JP4370360B2 - Dialog system using video distribution technology - Google Patents

Description

  The present invention relates to a moving image distribution technique, and in particular, by using a technique for transmitting and receiving a moving image file between a dedicated terminal connected to a television set in each home and a server installed on the Internet, online shopping and online video are performed. The present invention relates to a moving image distribution system that realizes a rental service and a remote dialogue (video chat) service.

At present, with the explosive spread of the Internet, many people are connected to this communication network to obtain and transmit various information.
In other words, an information terminal such as a personal computer (hereinafter “PC”) is prepared, connected to an ISP (Internet Service Provider) server through a communication line such as a telephone line, WWW (World Wide Web), e-mail, etc. Enjoy the service.
Recently, online shopping for purchasing various products through the Internet is becoming common.
In addition, with the spread of so-called broadband networks using broadband communication networks such as ADSL and optical fiber, it is expected that Internet distribution of video content with audio such as movies and promotional videos will be generalized in the future.
The spread of EC (electronic commerce) via the Internet eliminates the need for an intermediary that has previously been interposed between producers and consumers, and can be expected to reduce costs accordingly.

As described above, it cannot be denied that the advent of the Internet has brought various possibilities and conveniences to personal life and corporate activities.
However, since there are some problems inherent in the EC using the current Internet, it is only a secondary transaction form and is not far from the actual transaction amount.
First of all, there is a problem that the Internet communication environment mainly composed of personal computers is still difficult for elderly people, children and housewives and cannot be used as easily as watching TV.
Second, the Internet is an illegal area of information, and it is used in peaceful homes with children because illegal goods such as spears and drugs are traded, and fraudulent commercial laws are left open. There is a problem that can not be.
Third, while the Internet is a treasure house of information, there is a problem that general users cannot efficiently obtain only useful information and services for themselves because various information is flooded in a disorderly manner.

On the other hand, TV shopping that accepts orders from general viewers over the telephone by running advertisements for products and services using normal TV broadcasting has been growing, and there are even dedicated channels.
In this TV shopping, the familiar TV is the medium, so anyone in the family can easily purchase products, and there is a sense of security for products and transactions because of the intermediary between TV stations. There are also benefits to be gained. In addition, since it is possible to receive a description of a product mainly composed of moving image and sound, there is also an advantage that the characteristics of the product can be fully understood.
However, because the broadcast is intended for the general public, individual viewers need to continue watching the program until a product of interest appears, and they cannot quickly check information about the product they want. There was a grudge.
From the point of view of the product provider, there is no way to narrow down the target audience effectively, so it is necessary to pay a large amount of broadcasting fees to secure a broadcasting frame and to carry out uniform product advertisements to the general public. There was a problem.

In addition, as described above, with the spread of broadband networks, an increase in services for distributing moving image content to each user via the Internet is expected.
However, at present, in order to avoid copyright infringement, it is generally not permitted to download paid content in the user's information terminal, so the user must repeat the download every time the same content is viewed. I could not get it and it was very troublesome.
Of course, it is technically possible to store the video file in the user's information terminal at the same time as streaming playback of the video content. However, if this is allowed, there is a risk of illegal copying. It becomes difficult to find a provider.

Furthermore, as a more essential problem, there has been no system in which a general user can easily distribute moving image content to a third party via the Internet.
Certainly, video files that have been personally photographed by users have been posted on their own Web pages, and other users have downloaded them to a personal computer for viewing. Alternatively, an attempt has been made to connect a CCD camera to both personal computers and hold a video conference via the display.
However, in order to realize these, knowledge and time and effort concerning the Internet and image processing are required, and it is difficult to use them except for some enthusiasts and business operators.

  This invention was devised in order to solve the above-mentioned problems of the conventional Internet communication environment. You can watch service video advertisements and video content in your field of interest via the Internet, save video content for a limited time as needed, and easily send video files shot by the user via the Internet. The purpose is to realize a system.

In order to achieve the above object, an interactive system using the moving image distribution technology according to claim 1 includes a center server, a plurality of dedicated terminals connected to the center server via the Internet, and IDs possessed by each user. The center server includes a user database storing attribute information of each user in association with a user ID and a dedicated terminal ID, and a user ID and a dedicated terminal ID transmitted from each dedicated terminal. Means for executing an authentication process with reference to the user database, means for generating a web page for prompting identification of a partner user and transmitting it to at least one dedicated terminal, and information for identifying the partner from one dedicated terminal Is transmitted from the other dedicated terminal and means for transmitting the video file transmitted from the dedicated terminal to the other dedicated terminal. Means for transmitting the video file to one dedicated terminal, each dedicated terminal for connecting an input / output terminal for connecting a TV, a video input camera and an audio input microphone. Input / output terminal, card reader for reading user ID and dedicated terminal ID stored in ID card, means for transmitting user ID and dedicated terminal ID to center server, requesting user authentication, input through camera and microphone Means for converting the user's video and audio into a video file and transmitting the video to the center server; and displaying the video of the video file from the dedicated terminal of the other party transmitted from the center server on the television screen and transmitting the audio to the speaker It is characterized by having a means to output through.
As a result, the user can easily enjoy the video chat.
Or, by interacting with the staff of the product / service provider through this system during online shopping, it becomes possible to directly ask questions about unclear points only with video advertisements.

A dialog system using the moving image distribution technique according to claim 2 is based on the system according to claim 1, and the center server further stores a moving image file transmitted from both dedicated terminals. It is characterized by having means.
As a result, the conversation contents can be saved.

  A dialogue system using the moving image distribution technology according to claim 3 is based on the system according to claim 1 or 2, and each of the dedicated terminals has a built-in hard disk and is transmitted to the center server. Means is provided for storing the file and the moving image file transmitted from the center server in the hard disk.

  According to the dialogue system using the moving image distribution technology according to the present invention, the user can easily enjoy online video chat.

  FIG. 1 is an image diagram showing an interactive moving picture distribution system 10 for realizing a shopping system, a first video rental system, and an interactive system according to the present invention, and a center server 12 managed by an operator of this system. And a large number of dedicated terminals (set top boxes / STBs) 14 installed in each home, and a large number of local servers 16 managed by a company that provides products and services to general users using this system. Yes.

  The center server 12 is actually formed by connecting a plurality of computers to a network, and includes a WWW (World Wide Web) server function, a video content distribution server function, a database server function, a mail server function, an authentication server function, It has a payment server function, an electronic commerce server function, a time server function, and the like.

The center server 12 and each local server 16 are network-connected via the Internet 18 respectively. A business tie-up contract and a system use contract are concluded in advance between the system operator and the product provider.
The center server 12 and each dedicated terminal 14 are also connected to each other via the Internet 18. However, the dedicated terminal 14 is connected to the Internet 18 via a server (not shown) of an Internet service provider (ISP). Further, the ISP server and the dedicated terminal 14 are always connected via a high-speed and large-capacity so-called broadband network such as ADSL or optical fiber.
The center server 12 is also connected to a host computer 20 of a credit card company or a financial institution via a payment network such as CAFIS.

FIG. 2 is a block diagram showing a hardware configuration of the dedicated terminal 14, and includes a CPU 21, a hard disk 22, a memory (ROM, RAM) 23, a network controller 24, a TV controller 25, connected to the CPU 21 via a system bus. An IC card reader 26, a media processor 27, and an infrared communication unit 28 are provided.
A general television 29 is connected to the TV controller 25 via an input / output terminal and a connection cable.
Further, a broadband modem 30 is connected to the network controller 24 and is connected to the Internet 18 via the broadband modem 30 and the broadband network 31.
Further, a CCD camera 32 and a headset (headphone, microphone) 33 are connected to the media processor 27 via a dedicated port. The media processor 27 has a function of encoding / decoding moving image data and audio data in real time, and is connected to a memory 34 dedicated to image processing.

FIG. 3 is a block diagram showing the functional configuration of the system 10. The center server 12 includes a time limit management unit 40, a transaction processing unit 41, a moving image file processing unit 42, an authentication processing unit 43, and a Web page generation. A unit 44, a product / service database 45, a moving image database 46, and a user database 47 are provided.
The time limit management unit 40, the transaction processing unit 41, the moving image file processing unit 42, the authentication processing unit 43, and the web page generation unit 44 are configured so that the CPU of the computer constituting the center server 12 performs necessary processing according to the OS and the dedicated program. It is realized by executing.
The product / service database 45, the moving image database 46, and the user database 47 are stored in the hard disk of the computer.

The product / service database 45 stores information related to products and services supplied from the product / service provider to the user through the system 10.
FIG. 4 shows an example of data items set in the product / service database 45, with “product / service ID” at the top, “provider ID”, “product / service classification”, “product / service”. Items such as “name”, “video file ID”, “charge”, “target age”, “target sex”, “product / service overview”, and “order history” are set.

Of these, the “product / service name”, “fee”, “target gender”, and “product / service overview” can be arbitrarily set by the provider in principle, unless they are contrary to public order and morals.
On the other hand, the “product / service classification” needs to be set in accordance with a classification (type) system defined in advance by the system operator. This classification system has a hierarchical structure. For example, the following classification system is prepared for the rental video business.
・ [Rental Video] → [Movie] → [Separate Western / Japanese Movies] → [Genre (Distinction between Adult, Anime, Historical Drama, Western Drama, etc.) ”
・ [Rental Video] → [Baseball] → [Genre (Professional Baseball, Major League Baseball / University Baseball / High School Baseball etc.]
Only in the case of the video rental business, ID information related to the moving image file of the rental video main body is described in the “moving image file ID”.

In addition, the following classification system is prepared for the online shopping business.
-[Shopping] → [Genre 1 (high-level classification such as PC, clothing, liquor, food, etc.)] → “Genre 2 (Medium classification such as desktop type, notebook type, PDA, peripheral device, etc.)] →“ Genre 3 ( Printer, scanner, drive, memory, etc.)
Of course, these classification systems are merely examples, and a specific level may be determined in consideration of user convenience and operator complexity.
The “target age” is based on the premise of self-reporting by the operator, but system videos are also checked for adult videos.

The moving image database 46 stores information regarding moving image files (moving image advertisement files and moving image files of rental video bodies) handled in the system 10.
FIG. 5 shows an example of data items set in the moving image database, with “moving file ID” first, “product / service ID”, “moving file name”, “storage directory”, “distribution history”. ”,“ Expiration date ”and the like are set.
The “expiration date” can be set to an absolute time limit such as “December 31, 2002”, but can also be set to a relative time limit such as “within 3 days after delivery”. .
The moving image file itself is encoded in advance in the system based on standards such as MPEG4 and MPEG2, and stored in a predetermined directory on the hard disk.
Although not shown, it is desirable to set an item that describes the capacity (number of bytes) of the moving image file.

The user database 47 stores information related to registered users of the system 10.
FIG. 6 shows an example of data items set in the user database. The “dedicated terminal ID”, “name”, “age”, “sex”, “address”, “user ID”, "Phone number", "email address", "mobile phone number", "occupation", "work", "work phone number", "family structure", "credit limit", "transaction prohibition conditions", " Items such as “payment balance”, “credit card information”, and “usage history” are set.

A user who wishes to use the system 10 applies for a new subscription through the nearest agency. Specifically, in addition to attribute information such as name, age, gender, address, phone number, email address, mobile phone number, occupation, work place, work address, work phone number, family structure, etc. , Credit card number, etc. are required.
The application form must be filled in with all necessary information, and prescribed contractual clauses (for example, do not connect a dedicated terminal other than where you declared it, such as your home, or do not lend your ID card to others) The dedicated terminal 14 and the ID card 50 are issued to the user on the condition that they agree with the swearing contract clause. You may be required to present your driver's license, student ID card, health insurance card, etc. during this enrollment procedure.
A unique ID (MAC address) is assigned to the dedicated terminal 14. Further, the ID card 50 incorporates an IC memory, and the ID of the dedicated terminal 14 is stored together with the ID of the user in the IC memory.

When a user joins his / her child to this system, “use limit” and “transaction prohibition condition” can be described as special items on the application form.
For example, if a child user has a usage limit of “3,000 yen” per month, and the child user attempts to purchase a product that exceeds 3,000 yen per month, the transaction processing unit 41 “exceeds the limit amount”. A warning message is sent and the transaction is rejected. As a result, it is possible to prevent a child from purchasing a large amount of merchandise without the knowledge of the parent.
In addition, when a prohibition condition for “exclusion of adults” is attached to a child user, even if the child user orders video rental or adult goods purchase with an adult classification, the transaction processing unit 41 Detects this and the transaction is rejected. Alternatively, it may be configured to be controlled by the web page generation unit 44 so that adult information is not displayed in the service menu from the beginning when a child user uses it. As a result, the child user can be protected from harmful information.

The contents described in the application form are stored in the user database 47 by the system operator.
As described above, instead of performing the subscription procedure at the agency, the user can also subscribe by accessing the Web site of the center server 12 from a personal computer via the Internet 18 and entering the necessary items in a predetermined input form. . In this case, the dedicated terminal 14 is delivered to the home by a courier service or the like.
When relatives living together join this system, their own user ID is associated with one dedicated terminal 14.

The user who has completed the subscription procedure installs the dedicated terminal 14 at the home 51 and connects to the broadband modem 30 via the LAN cable and also connects to the television 29 via the AV cable. Further, the CCD camera 32 and the headset 33 are connected to the plug of the dedicated terminal 14 as necessary.
Here, when the dedicated terminal 14 and the TV 29 are turned on and the remote control device 52 is operated to adjust the TV 29 to the dedicated channel, the control program and the dedicated program stored in the memory 23 and the hard disk 22 of the dedicated terminal 14 are displayed. The web browser program is activated, and a message prompting the user to insert the ID card 50 is displayed on the screen 53 of the television 29 as shown in FIG.

Accordingly, when the user inserts his / her ID card 50 into the card slit of the dedicated terminal 14, the IC card reader 26 reads the user ID in the IC memory.
At the same time, an opening signal is output from the dedicated terminal 14 to the IP address of the center server 12. Upon receiving this, the authentication processing unit 43 of the center server 12 sets a “open” flag for the MAC address of the dedicated terminal 14 in a dedicated terminal database (not shown).
The authentication processing unit 43 refers to the user database 47 and confirms that the user ID associated with the dedicated terminal 14 matches the user ID of the ID card 50.
After clearing this authentication step, the user can select the menu button 54 listed in the lower column of the screen 53.

Hereinafter, a processing procedure when the user uses the system 10 as an online shopping system will be described with reference to the flowchart of FIG.
First, when the user operates the remote controller 52 to place the selection frame 55 on the “shopping” button 54 and presses the enter key, the web page generation unit 44 generates a web page for providing an online shopping service (S10). 18 to the dedicated terminal 14 (S11).
As a result, as shown in FIG. 9, a shopping page on which a large number of merchandise / service selection buttons 56 are arranged is displayed on the television screen 53 (S12).
These selection buttons 56 have “product / service classification” written thereon, and the user selects a necessary button 56 from among these by remote control operation. If the corresponding button does not exist in the list, the user can select the “▼” button and scroll down to search for the target product / service.

When the user selects, for example, “PC” from among the selection buttons 56 described above, the Web page generation unit 44 lists the intermediate classifications (desktop type, notebook type, PDA, peripheral device, etc.) included in the “PC”. The web page thus displayed is displayed on the television screen 53 to prompt the user to make a selection.
On the other hand, when the user selects “Desktop type”, the Web page generation unit 44 extracts the product / service information with the “Desktop type” classification from the product / service database 45, and the product name or manufacturer name. A product selection page in which a plurality of model numbers, prices, etc. are listed is displayed on the television screen 53.
When the user selects a specific desktop personal computer from among them, the video file processing unit 42 having received this (S13) refers to the video database 46 and extracts the video file for advertisement associated with the ID of the product. Then, streaming delivery is performed to the dedicated terminal 14 via the Internet 18 (S14). At this time, the data of the moving image file is divided into a plurality of block units (for example, 1 block = 500 kbytes) and transmitted to the dedicated terminal.

In the dedicated terminal 14 that has received this, the distributed moving picture data in the MPEG4 format is decoded (decoded and expanded) by the moving picture reproduction program, and the video of the moving picture advertisement is displayed on the television screen 53 in real time (S15). In addition, sound is output from the speaker of the television 29.
In the dedicated terminal 14, the moving image / audio data is stored in block units in the hard disk 22 in parallel with the streaming reproduction (S16). As a result, the user can watch the video advertisement for several minutes in real time, and then rewind and play back the video advertisement downloaded in the hard disk 22 to confirm it many times.

The time required to download this video file depends on the data amount of the video file and the communication environment on the user side, and when the dedicated terminal 14 is connected to a high-speed, large-capacity line such as FTTH using optical fiber. The download is completed in the middle of the streaming playback, and the rewind playback and pause operation are possible thereafter.
For this reason, it is desirable to synthesize and display an icon and a message for identifying whether “downloading” or “downloaded” on the television screen 53.

As a result of viewing the video advertisement, the user who decides to purchase operates the cursor button of the remote controller 52 to align the selection frame with the “purchase” button on the screen 53 and presses the enter button.
This product selection information is transmitted to the center server 12 via the Internet 18.
Receiving this (S17), the Web page generating unit 44 generates a confirmation page in which the product name and price are specified, and transmits the confirmation page to the dedicated terminal 14 to display it on the television screen 53 (S18).
On the other hand, when the user selects the “confirm” button on the screen 53, the transaction processing unit 41 confirms the balance information in the user database 47 (S19), and if the balance is sufficient, the transaction processing unit 41 stores the balance information in the product / service database 45. At the same time that the order information is described in the corresponding record, the product order information is transmitted to the local server 16 of the product provider (S20).
Along with the product ID, the order information is attached with the user's name, address, and telephone number data stored in the user database 47. As a result, the local server 16 of the provider who has received the order information can immediately output a delivery command to the delivery server within the company.
Thereafter, the transaction processing unit 41 updates and registers the remaining amount obtained by subtracting the product price from the balance as a new balance in the user database 47 (S21).

As a payment method, the so-called amount method in which the price is subtracted from the advance payment paid by the user in advance as described above is employed, so that there is no risk of an uncollected accident.
If the advance payment is insufficient, the user can increase the balance by bringing cash to the nearest agent. Alternatively, the balance can be increased by bank transfer or credit card settlement.

Of course, in addition to the above-described prepaid method, the user can also make a credit card payment every time a product is purchased.
In this case, a payment method selection page is displayed after the transaction confirmation page, and the user is allowed to select a credit card payment.
Upon receiving this credit card payment selection information, the transaction processing unit 41 transmits the card number and payment amount information to the host computer 20 of the credit card company to which the user is a member, and inquires whether payment is possible.
Then, when a settlement-possible telegram is transmitted from the computer 20, the same product order process as described above is executed.

By adding a credit card function or a debit card function to the ID card 50 of each user, the payment processing can be simplified.
In this case, the ID card 50 adopts a type that incorporates a CPU in addition to the memory, and stores the program and card information (card number, password, etc.) for realizing the credit card function and the debit card function in the memory. Keep it. Information for identifying each user's dedicated terminal is also stored in the memory.
As a result, when the user inserts the ID card into the card slit of the dedicated terminal 14, the user's card information is read by the IC card reader 26 of the dedicated terminal 14 and transmitted to the center server 12. On the other hand, when the ID card is inserted into another dedicated terminal, access to the card information is rejected by the CPU in the card, so that security against theft or counterfeiting of the ID card is ensured.

Thereafter, when the user selects a credit card on the payment method selection page, the transaction processing unit 41 transmits a card number and payment amount information to the host computer 20 of the credit card company, and inquires whether payment is possible. When a settlement-acceptable message is sent from the computer 20, the same product order process as described above is executed.
When the user selects a debit card on the payment method selection page, the transaction processing unit 41 transmits a card number, a personal identification number, and payment amount information to the host computer of the financial institution, and requests a withdrawal from the user's account. When a payment completion message is transmitted from the computer, the same product order processing as described above is executed.
It should be noted that the password can be operated so that the user inputs it via the remote control device 52 at each settlement.

The purchase history information of the product / service by the user and the distribution history information of the moving image file for advertisement to the user are stored in the user database 47 together with the date / time information every time.
By using the history information and attribute information stored in the user database 47, it is possible to carry out effective marketing.
For example, when the user accesses the center server 12, the web page generation unit 44 checks the history information in the user database 47, and stores the product information of the genre that the user frequently purchases or browses the video advertisement. This corresponds to generating a web page posted in the top item of the new arrival information column and displaying it on the television screen 53.
It is also effective to reflect the history information in the arrangement of the selection button 56 displayed on the online shopping providing screen of FIG. That is, the button 56 is arranged in descending order of purchase record by the user, or a user selects a selection button “PDA” for a user who frequently watches a video advertisement regarding PDAs included in the subordinate concept of “PC”. Generate and arrange this at the top of the menu.

A product / service provider can also develop a rental video business by using the system 10 as a rental video system.
In this case, first, a rentable video title is registered in the product / service database 45. At this time, “Rental Video” is described as a high-level concept of the product / service classification item, a specific title name is used for the product / service name, a rental fee is used for the fee, and age restrictions such as “20 years or older” for the target age. Describe each piece of information. In addition, a tagline of the video is described in the product / service overview item.
At the same time, information related to the video file of the video main body is registered in the video database 46. At this time, the rental period (for example, 3 days) is described in the “expiration date” item.
Further, if there is an advertisement moving image file (promotion video) related to the video, information related to this is also stored in the moving image database 46.

Hereinafter, a processing procedure when the user uses the video rental service will be described with reference to the flowchart of FIG.
That is, the user who desires online distribution of rental video selects the “rental video” button 54 from the opening menu of FIG.
Receiving this, the Web page generation unit 44 generates a Web page for providing the video rental service (S30), and transmits it to the dedicated terminal 14 via the Internet 18 (S31).
As a result, as shown in FIG. 11, a rental video page in which a number of video genre selection buttons 57 are arranged is displayed on the television screen 53 (S32).
These selection buttons 57 indicate the genre of the video to be rented, and the user selects a necessary button 57 from among these by a remote control operation. If the corresponding button 57 does not exist in the list, the user can select the “▼” button and scroll down to search for the target genre.

When the user selects, for example, “movie” from the selection buttons 57 described above, a specific video title, rental fee, and rental expiration date are displayed through a selection screen of “foreign movie” and “Japanese movie”, and a video lower genre selection screen. Then, it reaches the list screen in which the playback time and the like are listed.
When the user selects a specific video title from among them, the video file processing unit 42 that has received the video title (S33) refers to the video database 46 and the video file for advertisement associated with the product / service ID of the rental video. Are extracted from a predetermined directory on the hard disk and streamed to the dedicated terminal 14 via the Internet 18 (S34).

In the dedicated terminal 14, the distributed moving picture data in the MPEG4 format is decoded (decoded / developd) by the moving picture reproduction program, and the promotion video of the movie is displayed on the television screen 53 in real time (S35). Corresponding sound is output from the speaker of the television 29.
In the dedicated terminal 14, the moving image / audio data is stored in the hard disk 22 in parallel with the streaming reproduction (S36).
As a result of viewing this video advertisement, the user who decides to borrow operates the cursor button of the remote controller 52 to align the selection frame with the “rental” button on the screen and presses the enter button.
This rental selection information is transmitted to the center server 12 via the Internet 18.
Receiving this, the Web page generation unit 44 (S37) generates a confirmation page clearly indicating the video title, rental fee, expiration date, etc., and displays it on the TV screen 53 (S38).
On the other hand, when the user selects the “confirm” button on the screen 53, the transaction processing unit 41 confirms the balance information in the user database 47 (S39), and if the balance is sufficient, the transaction processing unit 41 stores the information in the product / service database 45. Describe the order information in the corresponding record. At the same time, the moving image file processing unit 42 extracts the moving image file of the video body from a predetermined directory based on the command of the transaction processing unit 41, and distributes the streaming file to the dedicated terminal 14 via the Internet 18 (S40).
Thereafter, the transaction processing unit 41 updates and registers the remaining balance obtained by subtracting the rental fee from the balance as a new balance in the user database 47 (S41).

In the dedicated terminal 14, a dedicated moving image reproduction program is activated to decode the distributed moving image data in the MPEG4 format. As a result, the video image is displayed in real time on the television screen 53, and sound is reproduced from the speaker (S42).
In the dedicated terminal 14, video moving image data is sequentially stored in the hard disk 22 in parallel with the video streaming reproduction (S43). As a result, the user can view and play back the video downloaded in the hard disk 22 as many times as possible within the expiration date after watching the video for several tens of minutes to 2 hours in real time.

As described above, an expiration date is set in advance in the video file of the video body, and the expiration date information is also transmitted to the dedicated terminal 14 together with the video file of the video body.
As a result, the CPU 21 of the dedicated terminal 14 monitors the time data output from the clock circuit immediately after the moving image file is stored in the hard disk 22 in accordance with the time limit management program. When the expiration date comes, the moving image file in the hard disk 22 is immediately deleted (S44).
This expiration date monitoring is also carried out in the expiration date management unit 40 of the center server 12, and after the expiration date, the inside of the hard disk 22 of the dedicated terminal 14 is checked via the Internet 18 and whether or not the corresponding video file has been deleted. (S45).
If it has not been deleted for some reason (S46), a signal for instructing deletion is transmitted to the dedicated terminal 14 to be surely deleted (S47).

Since the hard disk 22 of each dedicated terminal 14 is shared and connected to the center server 12 in a fully accessible state, the time limit management unit 40 can check the presence or absence of a video file for each dedicated terminal 14 and delete it. It can also be executed.
In this way, the expiration date information is associated with the video file, and the dedicated terminal 14 side voluntarily deletes it after the expiration date, and the center server 12 side also manages the expiration date, and deletes it when a deletion omission is found after the expiration date arrives Since the video file of rental video is securely deleted after the expiration date, the copyright protection effectiveness can be ensured.

Unlike the general personal computer, the dedicated terminal 14 does not have an I / O port for taking out the information in the hard disk 22 to the outside, and the information itself is stored in an encrypted form. It is a mechanism that cannot be copied and reused.
In addition, if the power of the dedicated terminal 14 is turned off or the hard disk 22 is forcibly removed, the center server 12 can detect this. There is a system in place.
Therefore, although it can be said that the risk of illegal copying of a moving image file within the expiration date is extremely low, this system is provided with a function for identifying the source of illegal copying.

That is, when the moving image data decoding process is executed in the media processor 27 of the dedicated terminal 14, as shown in FIG. 12, the invisible digital watermark information 59 is embedded in each frame 58 constituting the moving image.
The digital watermark information 59 to be embedded here includes, for example, the ID of the dedicated terminal 14, the user ID, the moving image file ID, and download date / time information.
As a result, even if the moving image file stored in the hard disk 22 of the dedicated terminal 14 is illegally copied and leaked to the outside, the digital watermark information 59 is visualized by applying the moving image file to a dedicated detection program.
Since the digital watermark information 52 includes the dedicated terminal ID, user ID, moving image file ID, and download date / time information as described above, it is possible to easily identify the source of the illegal copy.
Since the digital watermark information 59 is engraved on all the frames 58 constituting the moving image file, the outflow source can be identified in the same manner even when partially copied as a still image.

In the rental video service using this system 10, since the video file is once downloaded into the user's dedicated terminal 14 as described above, the user can enjoy it repeatedly within the expiration date. it can.
Moreover, since the moving image file is surely deleted as soon as the expiration date comes, there is no copyright infringement problem even if it is stored in the hard disk 22. On the other hand, in the case of the conventional streaming distribution, the video data must be discarded simultaneously with the reproduction from the request for copyright protection, and the convenience for the user is impaired.
In addition, since there is no need to set up a store or hire a staff like a conventional rental video business, there is an advantage that a business can be easily opened. As a result, in addition to movie videos, it is possible to carry out a rental business for relatively minor video titles that were conventionally difficult to circulate, such as baseball broadcasts, entertainment news, and TV dramas.

  In addition, when transmitting moving image data from the center server 12 to the dedicated terminal 14, a predetermined encryption process is performed on the moving image data, and the transmission can be performed only by the intended dedicated terminal 14. Even if the video data is stolen by a malicious third party along the way, the interest of the copyright holder is not harmed.

  The expiration date is also set for the above-mentioned movie file for product / service advertisement, and the movie file is surely deleted by the center server 12 and the dedicated terminal 14 after the expiration date as in the case of the movie file of the rental video itself. It is desirable to prepare a mechanism for the electronic watermark information and to embed the digital watermark information during the decoding process in the dedicated terminal 14.

When other users in the home use this system, their own ID card 50 may be inserted into the slit of the dedicated terminal 14.
As a result, a menu screen dedicated to the user is formed through the web page generation unit 44 and displayed on the television screen 53.

In the above description, the case where the advertisement video file is delivered from the center server 12 to the dedicated terminal 14 in response to a delivery request from the user has been described. It is also possible to distribute files.
For example, while the traffic amount of the communication network is decreasing such as at midnight, the moving image file processing unit 42 extracts one or a plurality of advertising moving image files from the hard disk for each user, and the corresponding dedicated terminal 14 via the Internet 18. To push delivery.
At this time, the moving image file processing unit 42 refers to the user database 47 and preferentially extracts and distributes the moving image file for advertisement of the genre that the user frequently purchases or browses the moving image advertisement.

In response to this, the dedicated terminal 14 stores the video file for advertisement in the hard disk 22 in accordance with a dedicated control program.
The next day the user downloads the video file for rental video and other video files for advertisement from the center server 12 during the idle time (ten seconds to tens of seconds), the advertisement video file is stored in the dedicated terminal. It is played through the television by the control program.
As a result, the user can view a video advertisement in a field in which the user is interested in a short waiting time until the video playback.

When the reproduction of the advertisement moving image file is completed, information indicating the completion of reproduction is transmitted from the dedicated terminal 14 to the center server 12.
In the center server 12 that has received this, the transaction processing unit 41 registers the reproduction result information in the user database 47. Further, the reproduction result information and user attribute information (name, e-mail address, address, etc.) are transmitted to the local server 16 of the product / information provider (when there is user's consent).
The merchandise / service provider can send out e-mails and DMs based on this information to develop effective sales promotion activities.

FIG. 13 is a functional configuration diagram showing another embodiment of the video rental system.
The second video rental system 60 is characterized in that the center server 12 includes a reservation processing unit 61 and a mail processing unit 62, and other functional configurations are substantially the same as the center server 12 in the system 10 described above. However, the authentication processing unit 43 is omitted for convenience of illustration.
On the other hand, in the dedicated terminal 14, the CPU 21 and the media processor 27 operate according to the OS and the dedicated program, so that the mail receiving unit 63, the distribution request unit 64, the data storage unit 65, the reproduction processing unit 66, and the file management unit 67. A list generation unit 68 and a Web page display unit 69.

Hereinafter, a processing procedure when the user uses the second video rental system 60 will be described with reference to the flowchart of FIG.
First, a user who desires online distribution of rental video selects the “rental video” button 54 from the opening menu of FIG. As a result, a transmission request for the rental video service Web page is output from the distribution request unit 64 of the dedicated terminal 14 to the center server 12 (S60).
Receiving this, the Web page generating unit 44 generates a Web page for providing the video rental service, and transmits it to the dedicated terminal 14 via the Internet 18 (S61).
As a result, as shown in FIG. 11, a rental video page on which a number of video genre selection buttons 57 are arranged is displayed on the screen of the television 29.
On the other hand, when the user selects "Movie", the specific video title, rental fee, rental deadline, playback time, etc. are listed through the "Western movie" and "Japanese movie" selection screen and the video lower genre selection screen. Get to the list screen.

When the user selects a specific video title from these, a transmission request for a download Web page is output from the distribution request unit 64 to the center server 12 (S62).
Receiving this, the transaction processing unit 41 transmits the download Web page to the dedicated terminal 14 through the Web page generation unit 44 (S63).
Receiving this, the web page display unit 69 of the dedicated terminal 14 displays the download web page on the screen of the television 29. This download Web page describes the video title, expiration date, rental fee, etc. selected by the user.

Also, a transmission request for related information such as the file size (total number of bytes), expiration date, and title of the rental video file is output from the distribution request unit 64 of the dedicated terminal 14 to the transaction processing unit 41 (S64). .
Receiving this, the transaction processing unit 41 transmits the related information recorded in the moving image database 46 via the moving image file processing unit 42 (S65).
The data storage unit 65 describes these pieces of information in a download database (not shown) provided in the hard disk 22.

When the user confirms the contents of the download web page and selects the button displayed as “rental” by remote control operation, the distribution request unit 64 requests the transaction processing unit 41 to download the video file. Is output (S66).
Receiving this, the transaction processing unit 41 continuously sends out the corresponding moving image file to the dedicated terminal 14 through the moving image file processing unit 42 (S67). Further, according to the same procedure as described above, rental fee settlement processing is executed (S68).
In the dedicated terminal 14, the data of the moving image file transmitted by the data storage unit 65 is stored in a predetermined area of the hard disk 22 (S70). At the same time, the same data is read out by the reproduction processing unit 66, and the moving image and audio are reproduced through the television 29 (S71).

In the middle of downloading the above video file, if the download is interrupted because the center server 12 is down or the dedicated terminal 14 is turned off, the data storage unit 65 describes the number of bytes received so far in the download database in the hard disk 22 To do.
When the network between the dedicated terminal 14 and the center server 12 is restored, the distribution request unit 64 checks the number of received bytes described in the download database and distributes the remaining portion of the video file. Ask the center server 12.
Receiving this, the transaction processing unit 41 causes the moving image file processing unit 42 to transmit the remaining bytes of moving image data to the dedicated terminal 14 in units of blocks.
Because this so-called byte range distribution function is provided, the second video rental system 60 eliminates the need to download a relatively large volume of a video file from the beginning and realizes efficient distribution of the video file. it can. This byte range distribution function can also be applied when the moving image file is distributed from the center server 12 to the dedicated terminal 14 in the shopping system or the first video rental system described above.

The user can view the moving image file stored in the hard disk 22 any number of times until the expiration date elapses.
Specifically, when the user inserts his / her ID card 50 into the IC card reader 26 of the dedicated terminal 14, the list generation unit 68 checks the download database in the hard disk 22, and the video title associated with the user's ID To generate a list.

FIG. 15 is an example of the list, and a list of titles (main title / subtitle) and expiration dates is displayed.
Each video title has an icon indicating the current state. For example, “Japanese animals / natural monuments” is marked with an “OK mark 70” with a thumbs up, indicating that the download has been completed and the video file has already been stored in the hard disk 22. Has been.
On the other hand, “Japanese movie A” has a “FD mark 71” imitating a floppy disk, and the user has applied for video rental and the payment process has been completed. Is not completed, indicating that a download reservation is in progress.

Here, when the user selects a video title with the FD mark 71 by remote control operation, the distribution request unit 64 outputs a download request for the video file to the center server 12, and the video file processing unit 42 transmits the corresponding video file. Is done.
The data of the transmitted moving image file is sequentially stored in the hard disk 22 by the data storage unit 65, and simultaneously read out by the reproduction processing unit 66 and reproduced through the screen of the television 29 and the speaker.
When a part of the data of the moving image file is stored in the hard disk 22, the distribution request unit 64 requests the center server 12 to transmit the subsequent data by the byte range distribution function similar to the above, and the moving image file Data for the remaining number of bytes is transmitted from the processing unit 42 in units of blocks.

By the way, since the capacity of the hard disk 22 of the dedicated terminal 14 has a certain limit (for example, 20 to 100 GB), when a large number of moving image files are downloaded, a situation in which the disk capacity becomes insufficient occurs.
For this reason, if the disk capacity becomes insufficient during the moving image data storage processing by the data storage unit 65 (S69), the file management unit 67 executes the deletion processing of the stored moving image file (S72) to secure the necessary area. .
At this time, the file management unit 67 checks the expiration date information of the stored moving image file, and deletes the files in order from the closest expiration date.

However, the deleted moving image file also displays the title of the moving image file with the FD mark 71 in the list created by the list generation unit 68 as long as the expiration date remains.
Therefore, when a user who wants to view the moving image file selects the title with the remote controller, the distribution request unit 64 transmits a re-download request to the center server 12, and distribution and simultaneous reproduction are immediately possible.
At this time, deletion processing of other stored moving image files is executed by the file management unit 67 as necessary, and the disk capacity is secured.

The list generation unit 68 checks the expiration date information of each moving image file when generating the list, and deletes the moving image file whose expiration date has passed from the list. As a result, the user can no longer reproduce the moving image file thereafter.
However, as long as there is room in the capacity of the hard disk 22, the expired moving image file is not immediately deleted, but is retained in the hard disk 22 for a certain time (for example, 5 hours).
If there is an input requesting rental again for the same title within this period, a request to that effect is sent from the distribution request unit 64 to the center server 12, and the transaction processing unit 41 executes the charging process. File distribution is not performed.
Instead, new expiration date information is added to the moving image file held in the hard disk 22 of the dedicated terminal 14 and added to the movie list of FIG. At this time, of course, “OK mark 70” is added to the video title.

On the other hand, when 5 hours have passed after the expiration date, the moving image file is deleted by the file management unit 67.
As a result, at the time of re-rental, the moving image file is delivered again.
Needless to say, the file management unit 67 preferentially deletes the moving image file when the expiration date has expired and the capacity has fallen shortly while it is temporarily left in the hard disk 22.

The list generation unit 68 lists only the moving image files associated with the user IDs recorded on the ID card 50 and displays them on the screen of the television 29.
Therefore, even if a single dedicated terminal 14 is shared by several family members and a large number of video files downloaded individually by each person are stored in the hard disk 22, the video related to the user who is currently inserting the ID card 50 Only files are selected and displayed in a list.
For this reason, even if a video file with an adult type code is stored in the hard disk 22, it is not displayed in a list when used by a child user, and therefore cannot be played back. ing.

By the way, when a moving image file having a length of about 2 hours is downloaded from the center server 12, when a relatively low speed ADSL line is used, it takes about 2 hours.
Of course, in the case of this system 60, playback is performed at the same time as downloading, and so-called trick play such as rewinding and fast-forwarding is possible in units of blocks, so the user does not have to wait for 2 hours.
However, in order to freely enjoy trick play for the entire moving image file, the entire moving image file needs to be already downloaded.
For this reason, the user can set a download reservation without reproduction for the dedicated terminal before going to bed or going to work, for example.

When the set time comes, the distribution request unit 64 is activated, and requests the center server 12 to distribute the video file reserved by the user.
The moving image data transmitted from the moving image file processing unit 42 is stored in the hard disk 22 by the data storage unit 65.
As a result, the user can enjoy trick play on the downloaded video file immediately after getting up or returning home.

Furthermore, the user can make a download reservation via a mobile phone, a PDA (personal digital assistant), a laptop computer, or the like that has an Internet connection function when away from home.
For example, the user accesses the website dedicated to the mobile phone provided in the center server 12 from the mobile phone 72 via the Internet 18 and inputs his / her user ID and password. Select.
Receiving this, the reservation processing unit 61 transmits a search page for a video file that can be reserved and displayed on the display of the mobile phone 72.
On the other hand, the user selects a target video title by specifying a keyword, a genre, and the like, then selects and inputs a download start date and time, and transmits it to the center server 12.
Receiving this, the reservation processing unit 61 passes the reservation information input by the user to the mail processing unit 62, and generates an e-mail for download reservation.

In this e-mail, the ID and mail server name (mail address) of the user are described in the destination field, and characters indicating a reserved mail such as “DNA RESERVE” are described in the title field.
Further, the following information is described in the text column.
(1) URL of the content server where the video file is stored + file name + extension
(2) Movie file name
(3) Video file extension (file format)
(4) Title characters for list display
(5) Rental expiration date
(6) Content type
(7) Download start time

The following is a specific description example of the reservation mail.
<Subject>
DNARESERVE
<Text>
movie_url = http: //enrak.tv/video/art01.m4t ← (1)
movie_title = art01 ← (2)
movie_type = m4t ← (3)
movie_list = Japanese Movie A ← (4)
expiration = 2002-08-18 10:46:21 ← (5)
protected = 1 ← (6)
dl_time = 2002-08-15 15:25:00 ← (7)

The mail receiving unit 63 of the dedicated terminal 14 periodically (for example, every 10 minutes) based on the user ID and mail server information described in the currently inserted ID card 50, the mail processing unit 62 ( Connect to a mail server and request delivery of a reservation email.
When the reservation mail is accumulated in the user's mailbox, the mail receiving unit 63 receives the e-mail from the mail processing unit 62 and extracts the reservation information described in the text column (the reservation information is extracted. Later, the email is deleted).
This reservation information is passed to the distribution request unit 64, and the distribution request unit 64 requests the center server 12 to distribute the video file.
Receiving this, the transaction processing unit 41 executes the necessary billing process, and then distributes the target moving image file to the dedicated terminal 14 via the moving image file processing unit 42.
This moving image file is stored in the hard disk 22 via the data storage unit 65.
As a result, the user can play the target moving image file immediately after returning home and enjoy trick play.

FIG. 16 shows an example of the server configuration of the second video rental system 60. The center server 12 includes a web server 74, a mail server 75, a database server 76, and a distribution server 77 connected via a hub 73. The content server 78 is provided. Each server is connected to the Internet 18 via a router 79.
In this case, the Web server 74 functions as the transaction processing unit 41, the authentication processing unit 43, the time limit management unit 40, the Web page generation unit 44, the reservation processing unit 61, and the mail server 75 functions as the mail processing unit 62. Fulfill.
Further, a user database 47, a product / service database 45, and a moving image database 46 are provided in the database server 76.
Further, the distribution server 77 exhibits the function as the moving image file processing unit 42, and the actual moving image file is stored in the content server 78.

As shown in the figure, the distribution server 77 and the content server 78 can be distributed in different locations from the center server 12.
As a result, for example, the distribution server 77 and the content server 78 are installed in the movie company 80 having the copyright of the movie file, and necessary data relating to the movie file is registered in the database server 76 in the center server 12, Can be distributed to the dedicated terminal 14 through the distribution server 77 of the movie company 80.

In the above, the example in which the moving image file is transmitted from the center server 12 side to the dedicated terminal 14 has been described. However, since this system 10 can perform bi-directional distribution of the moving image file, the moving image captured by the user The file can be transmitted to the center server 12, or can be distributed to the local server 16 of another user or a product / service provider by relaying the center server 12.
In this case, the user connects the audio input / output headset 33 and the video input CCD camera 32 to the dedicated terminal 14.

Hereinafter, a processing procedure when the user uses the system 10 as a video chat system (interactive system) will be described with reference to the flowchart of FIG.
First, a user who wishes to perform a video chat (video conference) with another user using the interactive video file distribution function of the system 10 selects the “video chat” button 54 from the opening menu of FIG. select.
As a result, the web page for requesting the selection of the other party's user ID is transmitted from the web page generation unit 44 (S50). On the other hand, the user operates the remote controller 52 to select a numeric keypad on the screen 53, and selects and inputs the other party's user ID.
In response to this, the web page generation unit 44 (S51) transmits a confirmation screen displaying the name and service charge of the other party (S52).
On the other hand, when the user selects the “confirm” button on the screen 53, the transaction processing unit 41 confirms the balance information in the user database 47 (S53). If the balance is sufficient, the transaction processing unit 41 stores the balance information in the product / service database 45. The order information is described in the corresponding record, and the balance remaining after subtracting the service charge from the balance is updated and registered in the user database 47 as a new balance.
At the same time, the web page for video chat is distributed from the web page generation unit 44 to the dedicated terminal 14 of the application user and the other user (S54).

Here, when both users select the “start” button on the screen 53 (S55), the video chat between the users relaying the center server 12 becomes possible thereafter.
That is, the video and audio of one user are input to the dedicated terminal 14 through the microphone of the CCD camera 32 and the headset 33, converted into the MPEG4 format by the media processor 27 (S56), and divided into IP packets. Then, it is transmitted to the center server 12 via the Internet 18 (S57).
The moving image file processing unit 42 of the center server 12 transfers this IP packet to the dedicated terminal 14 of the partner user (S58).
In the dedicated terminal 14 of the other user, the moving image data is decoded, the video data is displayed on the television screen 53, and the audio data is output from the headphones (S59).
Both the dedicated terminals 14 execute the above-described encoding / decoding processing in real time, thereby realizing bidirectional moving image distribution / moving image reproduction.

When the user selects, a moving image file related to video chat is stored in the hard disks 22 of both dedicated terminals 14.
In addition, a backup of the moving image data can be left on the center server 12 side. When this backup request is transmitted from the user's dedicated terminal 14 to the center server 12, the moving image file processing unit 42 stores the moving image files transmitted from the dedicated terminals 14 of both users in the hard disk of the server, and the moving image database 46. Describe necessary items in

This video chat is well-utilized as a communication tool between individuals, such as between a husband and wife who are on their own, but has a greater value as a communication tool between general users and businesses.
For example, if a user who is shopping online can select the “face-to-face explanation” button displayed near the video advertisement display area of the product, the user can directly interact with the staff of the product provider. In the one-way product description, you can ask questions until you are satisfied with the unclear points.
In addition, it can be applied to remote English lessons, remote PC support, remote care business, remote medical examination by doctors, etc.

In the above description, the system 10 was constructed by connecting the stationary dedicated terminal 14 to the stationary television 29. However, the system is constructed by a small PDA equipped with an OS such as Linux, for example. You can also
In this case, a dedicated program necessary for realizing the function as a dedicated terminal is stored in the memory of the PDA. The PDA's liquid crystal display and speakers will take the place of the TV 29.
This PDA is connected to the center server 12 via the Internet 18 by inserting a wireless communication card into the CF card slot. Alternatively, the center server 12 can also be accessed by cooperation between a Bluetooth module embedded in the main body and a Bluetooth-compatible mobile phone.

Like the stationary dedicated terminal 14, the user completes the authentication by inserting his / her ID card into the card slot of the PDA, and can select a menu by tapping the liquid crystal display with a stylus pen.
The moving image data in MPEG4 format transmitted from the center server 12 is decoded by a dedicated program in the PDA, and is streamed and reproduced through a liquid crystal display and a speaker. This moving image data is stored in a small hard disk built in simultaneously with reproduction.
When video chatting is performed, the user's video and audio are captured using a built-in or external CCD camera and microphone.

It is a schematic diagram which shows the whole image of the bidirectional | two-way moving image delivery system which concerns on this invention. It is a block diagram which shows the hardware constitutions of a dedicated terminal. It is a block diagram showing a functional configuration of the interactive video distribution system It is explanatory drawing which shows the example of a data item set in a goods and service database. It is explanatory drawing which shows the example of a data item set in a moving image database. It is explanatory drawing which shows the example of a data item set in a user database. It is a layout figure which shows the state by which the opening menu was displayed on the television screen. It is a flowchart which shows the process sequence at the time of a user using an online shopping service. It is a layout figure which shows the state by which the page for shopping was displayed on the television screen. It is a flowchart which shows the process sequence at the time of a user using a video rental service. It is a layout figure which shows the state by which the page for rental videos was displayed on the television screen. It is an image figure which shows a mode that digital watermark information was embedded in each flame | frame which comprises a moving image. It is a block diagram which shows the function structure of a 2nd video rental system. It is a flowchart which shows the process sequence in a 2nd video rental system. It is a layout figure which shows the example of a display of a video title list. It is a conceptual diagram which shows the server structural example of a 2nd video rental system. It is a flowchart which shows the process sequence at the time of a user using a video chat service.

Explanation of symbols

10 Interactive video distribution system
12 Center server
14 Dedicated terminal (STB)
16 Local server
18 Internet
21 CPU
22 Hard disk
23 memory
24 Network controller
25 TV controller
26 IC card reader
27 Media processor
28 Infrared communication unit
29 TV
30 Broadband modem
31 Broadband network
32 CCD camera
33 Headset (headphone, microphone)
40 Time Limit Management Department
41 Transaction Processing Department
42 Movie file processing section
43 Authentication processing section
44 Web page generator
45 Product / Service Database
46 Video database
47 User database
50 ID card
52 Remote control device
53 TV screen
54 Menu button
55 Selection frame
56 Button for product / service selection
57 Button for video genre selection
58 Frames that make up a video
59 Digital watermark information
60 Second video rental system
62 Reservation processing part 61 and mail processing part
63 Mail receiver
64 Delivery request section
65 Data storage
66 Playback processor
67 File Management Department
68 List generator
69 Web page display area
70 OK mark
71 FD mark
72 mobile phone
73 Hub
74 Web server
75 Mail server
76 Database server
77 Distribution server
78 Content server
79 routers

Claims (3)

An interactive system comprising a center server, a plurality of dedicated terminals connected to the center server via the Internet, and an ID card possessed by each user,
The center server stores a user database storing attribute information of each user in association with a user ID and a dedicated terminal ID,
Means for executing an authentication process with reference to the user database when a user ID and a dedicated terminal ID are transmitted from each dedicated terminal;
A means for generating a web page that prompts identification of the other user and sending it to at least one dedicated terminal;
Means for transmitting a video file transmitted from the dedicated terminal to the other dedicated terminal when information identifying the other party is transmitted from the dedicated terminal;
Means for transmitting the video file transmitted from the other dedicated terminal to one dedicated terminal,
Each dedicated terminal above has an input / output terminal for connecting a TV,
An input / output terminal for connecting a camera for video input and a microphone for audio input;
A card reader that reads the user ID and the dedicated terminal ID stored in the ID card;
Means for transmitting a user ID and a dedicated terminal ID to the center server and requesting user authentication;
Means for converting video and audio of a user input through a camera and a microphone into a video file and transmitting the video to a center server;
An interactive system using moving image distribution technology, comprising: means for displaying video of a moving image file transmitted from a center server from a dedicated terminal of the other party on the television screen and outputting sound through a speaker.   The interactive system using the moving image distribution technique according to claim 1, wherein the center server includes storage means for storing a moving image file transmitted from both dedicated terminals. Each of the above dedicated terminals has a built-in hard disk,
The interactive system using the moving image distribution technique according to claim 1 or 2, further comprising means for storing the moving image file transmitted to the center server and the moving image file transmitted from the center server in the hard disk. .

Images