KR100510633B1 - Method for using amount display in satellite broadcasting receiver - Google Patents

Abstract

The present invention relates to a usage display method for displaying a usage record of a user on a screen in a limited reception system of a satellite broadcasting receiver. In particular, the program information corresponding to a channel selected according to a user's selection of a paid broadcasting channel is read and made into a database. When the user finishes watching the paid broadcast, if the user further requests to display the usage information on the broadcast, the user requests the display of the usage information on the paid broadcast by using the OSD of the decoder using the database program information and usage information. By displaying, the user can learn the paid broadcasting usage details in detail on the TV screen, so that the user can use the satellite broadcasting receiver more easily and conveniently.

Description

How to display usage on satellite receivers {METHOD FOR USING AMOUNT DISPLAY IN SATELLITE BROADCASTING RECEIVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiver, and more particularly, to a usage display method for displaying a usage record of a user on a screen in a conditional access system.

In general, a Direct Broadcast Satellite Set Top Box (DBS STB) compresses video / audio / data according to the MPEG 2 standard so that a broadcast signal transmitted digitally through satellites can be restored and viewed on TV. Is a device that

In satellite broadcasting, the adoption of a restricted access system (CAS) is essential for viewer management and toll collection.

The CADA is a TV program scrambled by a transmitting station for pay-per-channel (PPC) or pay-per-view (PPV) other than free and basic channels of satellite broadcasting. It is a system that manages the subscriber to receive the data service signal and the data service signal descrambled by using a smart card. Here, the PPC is a service that collects a predetermined fee for receiving a channel and is able to receive a broadcast, and the PPV is a service that calculates and charges a fee per program as a reception time.

In addition, the CAS controls and monitors subscriber access to the program to collect and store usage information from subscriber receivers. To this end, the limited reception system operator (RSMS) issues a smart card to the subscriber.

The smart card is an integrated circuit (IC) card similar to a credit card. The smart card stores channel information that can be viewed by the user in the case of a paid channel in the memory portion and usage information in the case of a PPV. Therefore, the information stored in the smart card can be extracted at the request of the limited reception system operator or the receiver, and the smart card also provides a control word (CW) necessary for descrambling the scrambled TV program.

The receiver receives an RSMS (Resource and Subscriber Management System) message from a broadcast signal, and includes an entitlement management message (EMM) including individual information such as the contents of a customer contract or a registration number, an EMM, a program or a control signal, and the like. The decryption key analyzed in the Entitlement Control Message (ECM) including common information is transmitted to the smart card, and the broadcast signal is descrambled using the CW received in response.

On the other hand, the CAS operating method can be roughly divided into two.

First, information of a channel that can be received in a Euro channel (PPC) method is input to a smart card, and usually pays a fixed fee. The second method is to pay as much as the time watched by the variable fee method of the PPV channel method, which can be divided into two methods. That is, the postpay method and the token method are as much as the time watched.

The postpaid method stores usage information on a smart card when selecting a PPV channel and charges for a certain period of time according to the amount, and records the usage record on the smart card only in this case according to the current 'Mugunghwa satellite' standard. .

The token method stores a token corresponding to a certain price in a smart card and decreases the token when selecting a PPV channel, and does not record a usage record according to the current 'Mugunghwa satellite' standard.

In this case, the pay channel (PPC) method pays a fixed fee according to the viewable channel, so a separate display of the usage record will not be required.

In addition, the post-payment method among the PPVs is based on the current 'Mugunghwa satellite' standard, which is a very small part of the contents watched by the user through the 'user record report' in the satellite broadcasting receiver as shown in FIG. Time 3) the end time of the viewing) can only be known, so only this can be informed to the user. This is because the memory capacity of the smart card is limited.

In addition, since the token method in the PPV does not record the usage record, the satellite broadcasting receiver may inform the user only about the remaining amount of the token through the 'token report' as shown in FIG.

Therefore, the conventional satellite broadcasting receiver employing the above-described limited reception system cannot display the usage record or display more detailed information to the user, such as broadcasting station name, title, classification, price, etc. It can be inconvenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a usage record of substantial contents to a user on a TV screen in a CA system using a smart card. The present invention provides a method of displaying a usage record in a satellite broadcasting receiver that displays the graphic.

A method of displaying a usage record in a satellite broadcasting receiver according to the present invention for achieving the above object includes a first step of databaseting program information of a selected channel when a user selects a pay broadcasting channel; A second step of additionally databaseting usage information when viewing ends, and a third step of displaying program information on the screen together with database-based usage information when a user requests to display usage information. It features.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a general satellite broadcasting receiver for performing a usage record displaying method according to the present invention. The satellite broadcasting receiver 21 is a tuner for correcting an error generated when a satellite signal is received and performing demultiplexing. And a descrambler 21-descrambled by receiving a control word (CW) if demultiplexed data is scrambled in the TP demultiplexer 21-1, the tuner and the TP demultiplexer 21-1. 2), the MPEG decoder 21-3 which decodes the data output from the descrambler 21-2 by using an MPEG algorithm and outputs it to a TV, descrambling and storing information when selecting PPV by a user A microcontroller (hereinafter referred to as a microcomputer) 21-5 for controlling the display of information, a nonvolatile memory 21-4 for storing information on the PPV broadcast under the control of the microcomputer 21-5, andIt consists of a smart card interface unit (21-6) for interface with the smart card (22).

4 is a flowchart illustrating a usage display method in a satellite broadcasting receiver according to the present invention.

According to the present invention configured as described above, when a signal emitted from a satellite is received by a small dish antenna, it is input to a tuner and a transport packet (TP) demultiplexer 21-1 through a low noise block (LNB) down converter. . The tuner and the TP demultiplexer 21-1 remove data errors and noise generated during a transmission process, and selectively demultiplex only data corresponding to a desired TV or data channel among data of multiple input channels to descrambler ( 21-2). At this time, the video and audio data for the pay channel (PPC) or PPV are scrambled for limited reception.

Therefore, if the user selects the PPV, the descrambler 21-2 needs to descramble for normal TV viewing, and for this purpose, the descrambler 21-2 needs the scramble CW. This is provided by the smart card 22.

That is, the demultiplexed data in the tuner and the TP demultiplexer 21-1 can be classified into two types according to its configuration format, which is a packetized elementary stream (PES) that delivers video / audio data to be broadcasted to a TV. PSI (Program Specific Information), which is information required for demultiplexing.

The PSI delivers information and program guide information capable of demultiplexing a desired channel in the form of a table. Among these, an RSMS message is required to obtain a CW, such as an EMM and an ECM table. Also included in the PSI is an event information table (EIT), a service description table (SDT) for a broadcast network, and a time and date table (TDT) having time information for program guide information required by the present invention. Here, the EIT informs the program information of each broadcasting station, the SDT informs the user how many times the channel is currently being broadcast, and the TDT indicates the current time.

Therefore, if the demultiplexed data is scrambled, the microcomputer 21-5 may extract the necessary portion of the contents of the EMM and ECM tables found through the tuner and the TP demultiplexer 21-1 and the smart card interface unit 21-6. The smart card 22 is transferred to the smart card 22 according to the interface standard (ISO / IEC 7816-3 standard), and the CW is obtained from the smart card 22 in response to the descrambler 21-2.

The descrambler 21-2 descrambles the scrambled PES data using CW and outputs the descrambled PES data to the MPEG decoder 21-3. The MPEG decoder 21-3 decodes MPEG data to transmit a video / audio signal to a TV or the like, and the video and audio are displayed on the TV.

On the other hand, when the user selects the PPV (step 401), the microcomputer 21-5 reads information on the broadcast selected by the tuner and the TP demultiplexer 21-1 from the EIT, SDT, and TDT tables (step 402). The database is stored in the nonvolatile memory 21-4 (step 403).

The content recorded in the nonvolatile memory 21-4 is not only a channel ID, a start time, and an end time to be recorded in the existing smart card 22, but also an event name, a content, a rating. , Price and so on.

To this end, look at the process of reading the item to be used in the present invention from the EIT, SDT, TDT table.

That is, the station name uses the service ID item of the EIT and then uses the service provider item in the service descriptor of the SDT.

The start time records the time at which the user started watching in the nonvolatile memory 21-4 using the TDT, and the end time records the time at which the user finished watching in the nonvolatile memory 21-4 using the TDT. do.

The title refers to the event name entry in the Short Event Descriptor of the EIT.

The classification refers to the Content Nibbles item in the Content Descriptor of the EIT.

The rating refers to the rating item in the Parental Rating Descriptor of the EIT.

The price is recorded based on the price item in the access descriptor of the EIT according to the charge rate set by the user actually watched.

Each item is stored in the nonvolatile memory 21-4 whenever the user selects the PPV.

That is, when the PPV is selected by the user, the microcomputer 21-5 reads the EIT, SDT, and TTD tables, records the station name, start time, title, classification, and rating in the nonvolatile memory 21-4, and then the user When the PPV broadcast ends (step 404), the EIT and TDT tables are read again (step 405), and the end time, price, total price, etc. are additionally recorded in the nonvolatile memory 21-4 (step 406).

Thereafter, whenever there is a 'usage display' command by the user's remote controller or the like (step 407), the microcomputer 21-5 reads the usage history stored in the nonvolatile memory 21-4 (step 408). By controlling the OSD of the decoder 21-3 (step 409), the PPV broadcast usage history is displayed on the TV screen as OSD characters.

For example, if the postpay method is shown in Figure 3a, if the token method is displayed on the TV screen as shown in Figure 3b.

This information is accumulated in a certain time unit, and then deleted and stored again.

On the other hand, the present invention can be applied to the case that you want to sum up the user's selection details later in all fields using CAS.

As described above, according to the usage display method of the satellite broadcasting receiver according to the present invention, the information corresponding to the channel selected according to the user's pay broadcasting channel selection is made into a database, and when the pay broadcasting of the user is finished, the broadcasting is performed. If the user further requests to display the usage information for the paid broadcasting after the database of the usage information, the user can display the details of the paid broadcasting usage on the TV screen by displaying the databaseized usage information using the OSD of the decoder. This makes it easier for the user to use the satellite broadcast receiver.

1A is a view showing an example of a usage display screen by a postpay method in a conventional PPV.

1B is a view showing an example of the usage display screen by the token method of the conventional PPV.

2 is a block diagram of a satellite broadcasting receiver for performing a usage display method according to the present invention;

3A is a view showing an example of the usage display screen by the postpay method of the PPV according to the present invention;

Figure 3b is a view showing an example of the usage display screen by the postpay method of the PPV according to the present invention

4 is a flowchart for performing a usage display method according to the present invention.

Explanation of symbols for main parts of the drawings

21: Satellite Broadcast Receiver 21-1: Tuner and TP Demultiplexer

21-2: Descrambler 21-3: MPEG Decoder

21-4: Nonvolatile Memory 21-5: Microcomputer

21-6: smart card interface 22: smart card

Claims (4)

A usage display method in a satellite broadcasting receiver, A first step of, when the user selects a paying broadcasting channel, program information including at least one or more of a broadcasting station name, a program start time, a title, a classification, and a rating of the selected channel in a non-volatile memory in the receiver; A second step of, if the viewing of the selected channel is ended, additionally databaseing usage information including at least one of an end time and a price in the memory; And a third step of displaying program information on the screen together with the usage information databased in the memory when the user requests to display the usage information. The method of claim 1, wherein the second step A method of displaying usage in a satellite broadcasting receiver, wherein the user records according to a predetermined charge rate for a time actually watched by a user. The method of claim 1, wherein the third step On-screen display Usage information display method in the satellite broadcasting receiver characterized by displaying the usage information in the form of characters. The method of claim 1, wherein the third step If the user requests to display the usage information, the usage display method of the satellite broadcasting receiver, characterized in that the display of the accumulated amount of the amount used or the amount of available tokens in a certain time unit.

Images