KR20090127555A - Video display device for pay-TV broadcasting and its control method - Google Patents

Abstract

PURPOSE: An image display device for watching charged broadcasting and a method of controlling the same are provided to synchronize information between the image display device with separate operability and a CAM(Conditional Access Module), thereby removing inconvenience of individually controlling two devices. CONSTITUTION: A charged broadcast processing unit(60) performs a descramble processing operation of a charged broadcast signal. A controller(80) transmits watching environment information of a free broadcast pre-stored in a memory unit according to connection of the charged broadcast processing unit. The controller controls watching environment setting of the charged broadcast based on watching environment setting information of the free broadcast.

Description

Image display device for receiving charged broadcasting and method of controlling the same}

The present invention relates to a video display device equipped with a CAM (Conditional Access Module) for pay-TV viewing, and more particularly, to a video display device for pay-TV viewing and a control method thereof for controlling additional information of pay-TV. will be.

Currently, an image display device is a device capable of receiving and displaying satellite broadcast, terrestrial broadcast, cable broadcast, etc., and receives the received digital broadcast (video / audio) signal in the form of compressed MPEG-2 and outputs it to the display screen.

The broadcasts that can be viewed on the video display device are largely classified into free channel broadcasts and paid channel broadcasts. Currently, paid channel broadcasts are descrambled by scrambled broadcasts by the Common Interface (CI) and the CAS (Conditional Access System). It is scrambled to watch.

Here, the CI method is divided into a PCMCIA module, which is a PC card equipped with a CAS function for watching pay channel broadcasting, and when the module (hereinafter referred to as CAM) is inserted into the CI slot of the digital set-top box, the corresponding CAS function is performed. Represents an interface that can be defined.

The second CAS method is equipped with a reception limiter for pay channel broadcasting inside a digital set-top box that encrypts a specific broadcast so that viewers can watch it at a certain price. That is, it includes a card such as a smart card for decoding a control word, which is a descramble key for decoding subscriber information and an encrypted broadcast signal, and an interface module for inserting the same into a CAS slot. do

That is, a conditional access system module (CAM) and a smart card which allow a user to control the reception of a pay broadcast by performing a descramble process of the descrambler in order to watch a pay broadcast. (Smart card) is purchased to establish an environment in which to watch paid broadcasting, and accordingly, the pay broadcasting is tuned to watch the desired pay broadcasting.

On the other hand, such paid broadcasts also provide additional services such as language selection and grade restriction using the CAM according to broadcast content.

That is, according to the conventional method of providing an additional service, a CAM constructed for watching pay TV provides an additional service through a smart card according to its own subject, and the video display device adds the additional information included in the broadcast signal. To provide services.

However, the method of providing additional services according to the related art provides the additional services for the paid broadcast and the free broadcast as described above, so that the user who views the free broadcast and the paid broadcast is free to use the additional information of the same nature. It is inconvenient to control the additional information for the broadcast and the additional information for the paid broadcast, respectively.

The embodiment according to the present invention has been devised to solve the above problems, so as to solve the inconvenience of having to control each of the two pieces of additional information from the user's point of view by synchronizing the additional information between the free and paid broadcasting. do.

According to an exemplary embodiment of the present invention, a video display device for viewing pay broadcasting includes: a pay broadcasting processor configured to perform a descramble processing operation of a pay broadcasting signal; An external interface unit to which the pay broadcasting processor is bound; A memory unit which stores viewing environment information of preset free broadcasting; And transmitting viewing environment information of free broadcasting previously stored in the memory unit according to whether the pay broadcasting processing unit is connected, and controlling the viewing environment of the pay broadcasting based on the viewing environment information of the free broadcasting. It is configured to include a control unit.

In addition, the control method of the video display device for pay-TV broadcasting according to an embodiment of the present invention comprises the steps of setting the viewing environment of the free broadcast; Determining whether the pay broadcasting processor is connected; Delivering viewing environment information of the free broadcast according to whether the pay broadcasting processor is connected; And setting the viewing environment of the pay broadcasting based on the viewing environment information of the delivered free broadcasting.

According to an embodiment of the present invention, a video display device and a control method thereof for paying broadcast viewing are synchronized between information display device having a separate operability and CAM, and the control is simplified. The inconvenience of having to control each can be reduced, and accordingly, the desired information can be easily changed to a single setting to freely control the broadcasting content that changes frequently.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

1 is a view showing the configuration of a video display device for pay-TV viewing according to an embodiment of the present invention, Figure 2 is a view showing the operation flow of the video display device for pay-TV viewing according to an embodiment of the present invention 3 is a flowchart illustrating a step-by-step method of controlling a video display device for viewing pay TV according to an embodiment of the present invention.

As shown in FIG. 1, an image display device for paying broadcast viewing according to an exemplary embodiment of the present invention includes a broadcast receiving unit 10 for receiving and processing a broadcast signal input from the outside, and the broadcast receiving unit 10. An image processing unit 20 for signal processing to display an image signal of a broadcast signal received through the display unit; a display unit 30 for displaying an image signal processed through the image processing unit 20; and a request command from a user. A key input unit 40 for receiving an input, a memory unit 50 for storing viewing environment information of free broadcasting set through the key input unit 40, and a pay broadcasting processing unit performing a descramble processing operation of a pay broadcasting signal 60, the external interface 70 to which the pay broadcast processor 60 is bound, and the free broadcast stored in the memory unit 50 according to whether the pay broadcast processor 60 is connected. And a control unit 80 for controlling the viewing environment setting of the pay broadcasting by transmitting the viewing environment information.

In addition, the broadcast receiver 10 includes a tuner 12, a demodulator 14, and a demultiplexer 16.

In addition, the pay broadcast processor 60 is configured to include a smart card 64 and the CAM 62 to which the smart card is bound.

Referring to the operation of the video display device for watching pay TV according to an embodiment of the present invention configured as described above are as follows.

The digital broadcast signal is transmitted in the form of a packetized transport stream by time division multiplexing a video signal, an audio signal, and additional data.

The broadcast receiver 10 receives a broadcast signal transmitted from the outside through an antenna, and tuners 12 for tuning a broadcast signal having a frequency band corresponding thereto according to a tuning control signal of the controller 80 to be described later; Demodulator 14 for outputting the tuned broadcast signal of a specific channel in the form of a transport stream through a VSB (Vestigial Sideband) demodulation process and error correction process, and a transport stream output through the demodulator 14 And a demultiplexer 16 for dividing the data of the form into a video signal, an audio signal, and various additional data defined by PSIP (Program and System Information Protocol) information and outputting them in the form of a bit stream.

The video data separated by the demultiplexer 16 is processed by the image processor 20 and displayed on the display unit 30.

In this case, the image processing unit 20 includes an MPEG-2 decoder and a scaler for converting video data so as to conform to a vertical frequency, resolution, aspect ratio, and the like that match the output standard of the display unit 30.

The display unit 30 may be applied to various types of display modules, such as digital light processing (DLP), liquid crystal display (LCD), plasma display panel (PDP), and the like.

In addition, the audio signal is processed by an audio processor (not shown) and output to a speaker. The audio processor may include an AC-3 decoder.

On the other hand, the received digital broadcast, there are largely paid and free-to-air (free-to-air), in order to view the paid broadcast to connect the pay-cast processing unit 60 to the external interface unit 70 to use do.

Here, the external interface 70 is preferably a PCMCIA module.

In addition, the pay broadcast processor 60 includes a CAM 62 for performing a descrambling processing operation of the pay broadcast signal and a smart card 64 inserted into the CAM 62.

That is, the user must separately purchase the CAM 62 and the smart card 64 and insert it into the external interface 70 to establish an environment for pay-TV viewing.

The controller 80 extracts PMT information from the additional information scrim separated by the demultiplexer 16, analyzes the extracted PMT, and decodes the currently selected channel as a pay channel. Checks whether there is a CA_SYSTEM_ID that indicates that the channel requires scrambling.

In this case, when CA_SYSTEM_ID exists in the PMT information of the channel selected by the user, the controller 80 determines that the channel is a pay channel for descrambling and transmits the corresponding broadcast signal to the pay broadcast processor 60.

In addition, when CA_SYSTEM_ID does not exist in the PMT information of the channel selected by the user, the controller 80 determines the channel as a free channel and bypasses the corresponding broadcast signal to the image processor 20.

The memory unit 50 stores viewing environment information of free broadcasting.

Here, the viewing environment information of the free broadcast is the viewing environment information of the broadcast program that the user can watch without additional sanctions, and includes menu language setting information, viewing restriction information, country information, time information, and password information.

However, in general, even if the user has already set up the viewing environment for the free broadcast, if the environment for viewing the paying broadcast is established, the viewing environment for viewing the paying broadcast should also be separately set.

Therefore, the controller 80 detects the connection of the pay broadcast processor 60, and when the pay broadcast processor 60 normally operates, the viewing environment information of the free broadcast stored in the memory unit 50. To the pay broadcast processor 60.

That is, the controller 80 transmits the viewing environment information of the free broadcast stored in the memory unit 50 so that the viewing environment of the pay broadcasting is set based on the viewing environment information of the free broadcasting previously set by the user. .

In addition, the pay broadcasting processor 60 synchronizes the viewing environment of the free broadcasting and the pay broadcasting using the viewing environment information of the free broadcasting delivered through the control unit 80.

That is, the pay broadcasting processor 60 sets the pay environment of the pay broadcast in the same manner as the watch environment of the free broadcast by using the transmitted viewing environment information of the free broadcast.

Accordingly, the user can easily set a viewing environment for pay broadcasting without going through a separate setting process.

In addition, the controller 80 periodically checks the viewing environment of the set free broadcasting and the viewing environment of pay broadcasting, and accordingly, the viewing environment of the set free broadcasting and the paying broadcasting are watched according to whether the viewing environment of a specific broadcasting is changed. Reset the environment.

That is, the controller 80 transmits the changed viewing environment information to the pay broadcasting processor 60 when the viewing environment of the free broadcasting is changed after the viewing environment setting of the free broadcasting and pay broadcasting. To reset the viewing environment.

In addition, the pay broadcasting processor 60 is configured to control the viewing environment information of the paid broadcasting when the viewing environment of the pay broadcasting is changed at a time after the viewing environment of the pay broadcasting is set based on the viewing environment information of the free broadcasting. In step 80, the viewing environment of the preset free broadcast is reset.

That is, referring to the operation flow of the control unit 80 and the pay broadcasting processing unit 60 as shown in FIG. 2, first, the pay broadcasting processing unit 60 receives corresponding connection information as the CAM is connected. 80).

In addition, the pay broadcasting processor 60 transmits information on whether the smart card 64 is inserted into the CAM 62 to the controller 80.

The controller 80 checks whether the pay broadcasting processor 60 is normally operated based on the CAM connection information and the operation information of the smart card from the pay broadcasting processor 60.

Subsequently, when the normal operation of the pay broadcasting processor is confirmed, the controller 80 transmits the viewing environment information of the free broadcast previously stored in the memory 50 to the pay broadcasting processor 60.

In addition, the pay broadcasting processor 60 synchronizes the viewing environment of the free broadcasting and the paying broadcasting based on the viewing environment information of the delivered free broadcasting. That is, the viewing environment of the paying broadcast is set in the same manner as the viewing environment of the set free broadcasting.

Subsequently, the pay broadcast processor 60 transmits the viewing environment setting information of the pay broadcast to the controller 80.

In addition, the controller 80 and the paid broadcast processor 60 transmits the corresponding change information to the other side according to whether the viewing environment of the corresponding free broadcast or the viewing environment of the paid broadcast is changed, thereby viewing or paying the free broadcast. The viewing environment of the broadcast is reset.

Accordingly, the user can set a viewing environment for pay broadcasting without performing a separate operation.

As such, the video display device for paying broadcast viewing according to the embodiment of the present invention synchronizes information between the video display device having a separate operability and the CAM and simplifies the control, thereby controlling the two devices from the user's point of view. It is possible to reduce the inconvenience to do, and accordingly, simply change the desired information to a single setting to freely control the broadcasting content that changes from time to time.

As shown in FIG. 3, in the method of controlling a video display device for paying broadcasts according to an exemplary embodiment of the present invention, the pay broadcast processor 60 is connected to establish an environment for paying broadcasts. (S10).

Subsequently, when the environment for pay-TV viewing is established, it is determined whether the pay-TV processing unit 60 operates normally (S20).

When the pay broadcasting processor 60 operates normally, the determination result (S20) transfers the viewing environment information of the free broadcast set by the user to the pay broadcasting processor 60 (S30).

Subsequently, the viewing environment of the free broadcast and the viewing environment of the paid broadcast are synchronized based on the viewing environment information of the delivered free broadcast (S40).

That is, the viewing environment of the paid broadcasting is set in the same manner as the viewing environment of the free broadcasting based on the preset viewing environment information of the free broadcasting (S50).

In operation S60, it is determined whether a viewing environment of a specific broadcast is changed among the set free and pay broadcasts.

Subsequently, when the viewing environment of the specific broadcast is changed (S60), the viewing environment of the free broadcast or the viewing environment of the paid broadcast is reset using the changed viewing environment information (S70). In other words, if the viewing environment of the free broadcast is changed, the viewing environment of the paid broadcasting is reset using the changed viewing environment information. If the viewing environment of the paying broadcasting is changed, the viewing environment of the free broadcasting is reset using the changed viewing environment information. do.

As such, the video display device and the control method for pay-TV viewing according to an embodiment of the present invention synchronize the information between the video display device having a separate operation and the CAM and simplify the control. It is possible to alleviate the inconvenience of having to control each device), and accordingly, it is possible to freely watch and control broadcasting content that changes frequently by simply changing desired information into one setting.

1 is a view showing the configuration of a video display device for viewing pay TV according to an embodiment of the present invention.

2 is a diagram illustrating an operation flow of an image display device for pay-TV viewing according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a step-by-step control method of a video display device for viewing pay TV according to an embodiment of the present invention.

<< Explanation of symbols for main part of drawing >>

10: broadcast receiving unit 20: image processing unit

30: display unit 40: key input unit

50: memory unit 60: pay broadcast processing unit

70: external interface unit 80: control unit

Claims (9)

A pay broadcast processor configured to perform a descrambling processing of the pay broadcast signal; An external interface unit to which the pay broadcasting processor is bound; A memory unit which stores viewing environment information of preset free broadcasting; And, A control unit which transmits the viewing environment information of the free broadcast previously stored in the memory unit according to whether the pay broadcasting processing unit is connected, and controls the viewing environment of the pay broadcasting based on the viewing environment information of the free broadcasting. Image display device for viewing pay-TV, characterized in that configured to include. The method of claim 1, And the viewing environment information includes at least one of menu language setting information, viewing restriction information, country information, time information, and password information. The method of claim 1, And the controller is configured to synchronize the viewing environment of the free broadcasting and the paying broadcasting based on the previously stored viewing environment information of the free broadcasting. The method of claim 3, wherein The pay-TV processing unit is configured to set the viewing environment of pay-TV as the viewing environment of the free broadcast on the basis of the viewing environment information of the free broadcast. The method of claim 3, wherein And the controller is configured to reset the viewing environment of the free and pay broadcasting using the corresponding change information according to whether the viewing environment of the specific broadcast is changed. In the control method of the image display device for pay-TV viewing with pay-TV processing unit for pay-TV viewing, Setting a viewing environment of the free broadcast; Determining whether the pay broadcasting processor is connected; Transmitting viewing environment information of the free broadcasting according to whether the pay broadcasting processor is connected; And, And setting a viewing environment of pay broadcasting based on the viewing environment information of the delivered free broadcasting. The method of claim 6, Setting the viewing environment of the pay broadcast is And a step of synchronizing the viewing environment of the free broadcasting and the viewing environment of the paying broadcasting based on the preset viewing environment information of the free broadcasting. The method of claim 6, Setting the viewing environment of the pay broadcast is And setting a viewing environment of pay broadcasting in the same manner as the preset viewing environment of the free broadcasting through the pay broadcasting processor. The method of claim 6, And resetting the viewing environment of the free and paid broadcasts by using the corresponding change information according to whether the viewing environment of the specific broadcast is changed. Way.

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