TWI400696B - Disc, player for playing disc and playing method thereof - Google Patents

Description

Disc, player for playing disc and playing method thereof

The invention relates to a disc, a player for playing a disc and a playing method thereof.

With the rapid development of optical disc and disc playback technology, more and more content is stored on the web server to download the content to the player during playback of the disc to play the disc with the player.

The downloaded content can be applications, audio, advertisements, games, animations, subtitles, and the like. The application refers to the application expressed by the JAVA language or the application expressed by other languages. Compared with other languages, the platform independence of the JAVA language determines that the application it expresses is more versatile. The JAVA application can be used to control the playback of different players. Storing it on a web server provides a wider commercial platform for different player manufacturers and provides users with more flexible applications.

After storing the above content on the web server, it can be downloaded to the player at any time to play the disc. This method is applicable to many optical discs and corresponding players, such as Blu-ray Disc and corresponding Player, eDVD (enhanced DVD) and the corresponding player.

Currently, the range of downloading content from the Internet is determined by the URL (Uniform Resource Locator) list (Walled Garden) stored in the disc. If the URL corresponding to the downloaded content is not in the URL list stored in the disc, the download is refused. The content.

However, the content corresponding to the list of URLs on the disc is only the content. The provider confirms that it is available to the user, ie it is stored directly on the web server and is not certified. Authentication means that when the content provider of the disc saves the content corresponding to the disc to the web server, the disc content provider itself or another certification authority (CA, Certificate Authority, such as Internet Explorer of Microsoft Corporation and Navigator of Netscape Corporation) Etc.) Confirmation can be provided to the user and the content of the private key (Private key) is added. The private key is digital information greater than or equal to 500 bits.

If the content stored on the Internet by the above-mentioned disc content provider is not authenticated, the content is easily changed by other people (such as hackers, pirates, advertisers, etc.), and the URL is still stored with the disc. The URLs listed on the URL list correspond to each other, so that the player performs the downloaded content, which is likely to cause damage to the player and the content of the optical disc, which causes great trouble to the user.

It may also be a new URL that the user enters according to his or her needs, or an unnamed URL that the system automatically jumps out during playback (eg, provided by hackers, pirates, advertisers, etc.). If the URLs are executed by the player corresponding to the list of URLs stored on the disc, it is also possible to generate the same hazard as described above.

In addition, if the third party allowed by the content provider or the content provider provides the user with new entertainment content, even if the downloaded content is required by the user and does not cause damage to the content of the disc, the player or the disc, If the URL corresponding to the content is not on the list of URLs stored on the disc, the player will still refuse to execute the downloaded content, which significantly reduces the user's entertainment range and limits the business model of the content provider.

Therefore, there is a need for an improved optical disc, a player for playing a disc, and a method of playing the same to avoid the above drawbacks.

The present invention provides a compact disc having a public key.

The present invention also provides a player for playing a disc having a public key.

The present invention also provides a method of playing a disc having a public key.

The technical problem to be solved by the present invention is achieved by the following technical solution: the optical disc of the present invention is used for playing with the downloaded content. The disc has a public key that is used to verify whether the downloaded content is authenticated content.

The optical disc player of the present invention comprises a reading device, a network interface and a verification module. The reading device is configured to read the disc content and the public key; the network interface is configured to receive the downloaded related content; and the verification module is configured to verify, according to the read public key, whether the downloaded content is authenticated content.

The playing method of the playing optical disc according to the present invention is to verify the downloaded content according to the read public key after reading the optical disc content and the public key and downloading the content, to confirm whether the downloaded content is the authenticated content.

According to the technical solution of the present invention, the optical disc, the player for playing the optical disc and the playing method thereof according to the present invention determine whether to execute the downloaded content by detecting whether the downloaded content is authenticated, and therefore, no matter how the URL changes. As long as the corresponding content is authenticated, it can be executed, and even if the URL corresponding to the downloaded content corresponds to the URL stored on the CD, the downloaded content will be rejected without being authenticated. Avoid the impact of executing virus-related information, and improve the The user's interest in watching the disc.

1 shows an embodiment of the present invention. In this embodiment, the disc 2 is played by the player 3, and the player 3 is linked with the web server 4 to download the content of the web server 4 during playback. To play the disc 2 in conjunction with the content already existing on the disc 2.

The downloaded content can be applications, audio, advertisements, games, animations, subtitles, and the like. The application refers to the application expressed by the JAVA language or the application expressed by other languages. Compared with other languages, the platform independence of the JAVA language determines that the application it expresses is more versatile. The JAVA application can be used to control the playback of different players, store them on a web server to provide a wider commercial platform for different player manufacturers, and provide users with more flexible applications.

And the downloaded content is certified content, that is, when the content provider of the optical disc stores the content corresponding to the optical disc on the web server, the optical disc content provider itself or another certification authority (CA, Certificate Authority, For example, Internet Explorer of Microsoft Corporation and Navigator of Netscape, etc.) confirm the content that can be provided to the user and added a private key, and the private key is digital information greater than or equal to 500 bits. Because of the existence of a private key, the content of such downloads is not easily modified on the Internet.

FIG. 2 is a schematic structural view of a compact disc 2 according to an embodiment of the present invention. The optical disc 2 includes a BCA (Burst Cutting Area) area 22, a lead in area 24, and a Media Content Area 26. Wherein, the BCA area 22 includes a public key 23, and the public key 23 is used for verifying the playing of the optical disc 2 Whether the content downloaded is authenticated, corresponds to the private key of the downloaded content and is greater than or equal to the digit information of 500 bits.

The verification is performed by an asymmetric algorithm (such as a hash algorithm, etc.), in which the digital information obtained by downloading the private key of the content and the public key 23 of the optical disc 2 is obtained by a digital information (described later).

The public key 23 shown in FIG. 2 is located in the BCA area 22 of the optical disc 2. This is only an example. The public key 23 can also be located in other areas of the optical disc 2, such as the lead-in area 24 of the optical disc and the optical disc content area 26. In addition, FIG. 2 only shows a public key 23, and in fact, a plurality of public keys 23 may be present to point to different contents of the entire optical disc 2, respectively. The public key 23 of the disc 2 can also be used to be sent to the web server 4 to obtain the right to play the disc 2.

FIG. 3 shows an optical disc player 3 according to an embodiment of the present invention. The optical disc player 3 includes a network interface 31, a control system 32, a drive 39, and an output device 40.

The control system 32 is used to control the working process of the optical disk drive 39 and the output device 40, and includes a RAM 33, a ROM 35, and a CPU 38. A buffer 34 is included in the RAM 33 for buffering the received content delivered via the network interface 31. The ROM 35 includes a detection module 36 and a verification module 37. The ROM 35 is linked to the RAM 33 and receives the downloaded content transmitted by the RAM 33.

The CPU 38 is linked to the RAM 33 and the ROM 35 and controls the operations of the RAM 33 and the ROM 35. The disc drive 39 is used to read the media content and the public key 23 of the disc 2 under the control of the control system 32, and to transfer the read public key 23 to the ROM 36 in the control system 32, and to deliver the media content to the output device. 40.

The detection module 36 in the control system 32 is configured to detect whether the downloaded content transmitted by the buffer 34 is complete. If not, the content of the download is discarded; the verification module 37 detects the download in the detection module 36. If the content is complete, it is used to verify whether the downloaded content is certified content, and its verification is achieved by using the mature public key system algorithm and protocol, for example, by downloading the digits of the private key in the content and transmitting the video to the disc drive 39. The digital operation relationship of the public key 23 is obtained, and the verification result is calculated. For a simple example, the relationship between the public key 23 of the optical disc 2 and the private key of the downloaded content is Y=B ^x , wherein the public key 23 includes digits Y and B, and the digit of the private key of the downloaded content includes X, and the verification module of B ^x is calculated, if the calculation result is Y, that is, the content downloaded by the verification, and that content is certified and download the executable play; if the calculation result is not Y, that is, the content download unverified, then Player 3 will refuse to execute the downloaded content. The output device is configured to output information read by the optical disc drive and information output by the control system. The roles of the above components are all achieved by the cooperation of the CPU 34.

FIG. 4 is a flowchart of a method for playing a disc according to an embodiment of the invention. After the player 3 reads the content of the optical disc and the public key (S100), the content related to the content of the optical disc is downloaded from the web server (S110).

Next, integrity detection is performed on the downloaded content (S120) to confirm whether the downloaded content is complete, and if it is incomplete, the content of the download is discarded (S130).

If the downloaded content is complete, the read optical disk public key 23 is used to detect whether the downloaded content is the authenticated content (S140). If it is unauthenticated content, it will give up the execution of the downloaded content (S130); The content of the certificate directly executes the downloaded content (S150), thereby achieving the cooperation with the information stored on the disc 2 to play the disc 2.

According to the technical solution of the present invention, the optical disc, the player for playing the optical disc and the playing method thereof according to the present invention determine whether to execute the downloaded content by detecting whether the downloaded content is authenticated, and therefore, regardless of the URL. The change may be performed as long as the corresponding content is authenticated, and even if the URL corresponding to the downloaded content corresponds to the URL stored on the disc, the downloaded content will be rejected without being authenticated. This avoids the impact of executing virus-related information and increases the user's interest in watching the disc.

Although the present invention has been described in connection with the specific embodiments thereof, it will be apparent to those skilled in the Accordingly, the present invention is intended to embrace all such alternatives, modifications and

2‧‧‧DVD

3‧‧‧ Player

4‧‧‧Web server

22‧‧‧BCA District

23‧‧‧ public key

24‧‧‧ lead-in area

26‧‧‧Media Content Area

31‧‧‧Network interface

32‧‧‧Control system

33‧‧‧RAM

34‧‧‧ buffer zone

35‧‧‧ROM

36‧‧‧Test module

37‧‧‧ verification module

38‧‧‧CPU

39‧‧‧Disc drive

40‧‧‧Output device

1 is a schematic diagram showing the relationship between an optical disc and related components according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the optical disc of FIG. 1; FIG. 3 is a schematic structural view of the player of FIG. Method flow chart.

Claims (12)

An optical disc player (3) comprising: a reading device (39) for reading the content of a disc (2) and a public key; a network interface (31) for receiving from a a download content of the server, wherein the download content is for cooperating with the content stored on the optical disc (2) during playback; a verification device (37) utilizing the read from the optical disc (2) The public key (23) verifies whether the downloaded content is authenticated according to a public key system using a public key and a private key; and an output device (40) for authenticating and verifying only the downloaded content The download is played out of date. The disc player of claim 1, further comprising a detecting means (36) for detecting the integrity of the downloaded content, wherein the verifying is not performed if the detected content is incomplete. The optical disc player of claim 1, wherein the download content is an application adapted to control playback of the optical disc player. For example, the optical disc player of claim 3, wherein the downloaded application is a JAVA language application. The disc player of claim 1, wherein the download content is a subtitle. A playing method for playing a disc (2) by a disc player, comprising the steps of: reading (S100) the content of the disc and a public key; downloading (S110) content from a server to the disc player Which should The download content is for cooperating with the content stored on the optical disc (2) during playback; using the public key (23) read from the optical disc (2) to use a public key and a private key A public key system verifies (S140) whether the downloaded content is authenticated; and plays the downloaded content only when the downloaded content is authenticated and verified. The playback method of claim 6, further comprising detecting (S120) the integrity of the downloaded content to confirm whether the downloaded content is complete, wherein if the downloaded content is incomplete, the verifying step is not performed (S140) And if the downloaded content detected is complete, the verification step is performed (S140). If the playback method of claim 6 or 7 is verified, the downloaded content is unauthenticated, and the downloaded content is refused to be played. The playback method of claim 8, if the downloaded content is authenticated, the downloaded content is played. The playback method of claim 6, wherein the download content is an application adapted to control playback of the optical disc player. The playback method of claim 10, wherein the downloaded application is a JAVA language application. The playback method of claim 6, wherein the download content is a subtitle.