JP2000295541A - Broadcast receiver, method for processing contract information of the broadcast receiver, and recording medium for contract information processing program for the broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a broadcast receiver by which a contract status can be confirmed at a practical speed and the contract status with respect to respective channels can be confirmed even when a package contract is made for a plurality of channels. SOLUTION: Contract information is set in an ID list included in an SI (program information) in a transport stream, a control means 8 separates the contract information from the SI resulting from being separated from the transport stream that is received by a reception means 2 and demultiplexed by a demultiplexer means 3, and a restriction reception control means 10 collates the contract information with contents of an IC card. Thus, the contract status can quickly be confirmed with respect to each channel even when a package contract is made for a plurality of channels as well as a contract of a single channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiving apparatus, a contract information processing method for a broadcast receiving apparatus, and a contract information processing program recording medium for a broadcast receiving apparatus. And an interactive function using information about a contract, that is, a system in which bidirectional information exchange between a viewer and a broadcaster can be easily realized.

[0002]

2. Description of the Related Art In recent digital broadcasting, unlike conventional terrestrial broadcasting, viewers contract with a broadcasting company,
It is common to manage the contract and pay broadcast viewing using a conditional access system called CA (Conditional Access). The broadcast radio wave is transmitted after performing concealment called scramble, and has an STB (Set
A receiver in the form of a Top Box) or a television compatible with CS broadcasting is provided with a CA control module composed of an IC card or the like in order to cancel the scramble. This IC card is usually attached to a receiver, and this IC card sends a key for descrambling the broadcast to the receiving device side, and the receiving device can use the key to descramble and view the broadcast. With the ability to do so. Which program can be descrambled is determined by ECM (Entitlement Control Message: common information) transmitted along with the program
And the contract status of the IC card, and this is changed by the following two means.

[0003] In a contract channel whose viewing is determined by a contract, viewing is performed by purchasing the channel. For this type of broadcast, if the viewer makes a contract with the broadcaster using communication means such as telephone contact, postal mail, or an Internet homepage before the viewer starts viewing, the broadcaster can provide the viewer with an EMM (Entitlement Management).
Message: An individual packet of contract change for individuals called an individual information is transmitted. When the viewer receives the EMM packet by selecting a radio wave broadcast by the broadcaster, information contained in the EMM, that is, which channel has been contracted is recorded on the IC card, and the scramble is released. By storing information for generating a key, actual broadcast viewing can be performed.

[0004] Also, a program called Pay Per View (hereinafter referred to as PPV), which can be purchased in program units, is broadcast. When the viewer performs a purchase confirmation operation and views the PPV program, the purchase of the PPV program is recorded on the IC card. This record
When the data is totaled, the data is transmitted to the broadcast center side of the broadcasting company via a telephone line or the like connected to the STB, and is charged.

[0005] In addition to realizing contracts and purchases on a channel-by-channel basis and on a program-by-program basis as described above, age restrictions that allow only viewers who have reached a certain age to view programs, and prohibition of viewing in specific areas. It is possible to control whether or not viewing is possible under various conditions such as:

Next, conditional access control will be described. As shown in FIG. 13A, a fixed-length packet is included in an MPEG-2 transport stream (TS).
Audio (Audio) A, Video (Video) V, SI,
CA data is multiplexed, and these are distinguished from each other by a header. The data of SI and CA is configured by the transport decoder into a section format as shown in FIG. The data-byte section is sent to the IC card which is a part of the conditional access control means 10, whereby the contents of the common information ECM are entered in the IC card.

[0007] As shown in FIG. 14A, the configuration of the ECM includes, as program information, a protocol number PN, a broadcast program number identifier PNI, a work key identification WKI, and a section D.
V, service identification SI, scramble key SK, number classification NG, program number PNU, registration determination type RJT, reference registration code RRT, pay-per-view viewing fee PVC, scramble effect control SEC, date / time / minute information YMD, program information change PIC, It includes a tampering detection AD, an extended area EA, and a program message PM.

Further, as shown in FIG. 14 (b), this ECM has a protocol number P as control information.
N, broadcast program number identifier PNI, work key identification WKI,
Division DV, individual information number IIN, decoder identification number DI
N, forced on / off FNF, tampering detection AD, and extended area EA.

FIG. 15 shows a schematic configuration of a broadcasting system that enables conditional access. In FIG. 15, an A / V / D signal, which is a digital signal of video and audio of a produced program, is scrambled by a scrambler S on a broadcaster side, and is transmitted to a receiver side in a transport stream. . The scramble key Ks used for this scramble is encrypted by the encryption unit C1 and
It is transmitted in a CM (common information), which is retransmitted at a cycle of about 0.1 second to 1 second and updated at a cycle of about 1 second to 10 seconds. The work key Kw used for encrypting the scramble key Ks is encrypted by the encryption unit C2 and transmitted as EMM (individual information). The work key Kw is updated in a long cycle, and is updated by the fixed master key Km. Encrypted.

On the other hand, on the receiver side, the scrambled A / V / D signal transmitted in the transport stream is decoded by the descrambler DS. As the scramble key Ks used in the descrambler DS, the one transmitted by the ECM and decrypted by the decryption unit DC1 is used. The work key Kw used to decrypt the scramble key Ks is transmitted and decrypted by the EMM (individual information). The one decoded by the unit DC2 is used. The decryption of the work key Kw is performed by using the master key Km unique to the IC card. The decrypted work key Kw is temporarily stored in the IC card, and is taken out from the IC card when decrypting the scramble key Ks. Is used. Whether the broadcast contents can be viewed by the receiver is determined depending on what kind of Kw is held, but the contents cannot be referred to.

Conventionally, an apparatus for receiving this type of broadcast is shown in FIG.
It was configured like 1. In FIG. 11, 1 is CS
The antenna 2 is a receiving unit that decodes the CS broadcast received by the CS antenna 1, has a front end such as a tuner, selects a CS broadcast, and performs QPSK (4
Demodulation of phase shift keying). Reference numeral 3 denotes a demultiplexing unit, which outputs video information, audio information, EMM and EC from the MPEG2 transport stream output from the receiving unit 2.
M (Entitlement Control Message: common information) and SI
(Program information). 4 is a descrambler,
The video information and the audio information output from the demultiplexing unit 3 are descrambled using the key information. Reference numeral 5 denotes audio decoding means for decoding audio information descrambled by the descrambler 4. Reference numeral 6 denotes an audio output unit which outputs an audio signal decoded by the audio decoding unit 5 as a sound. Reference numeral 7 denotes a video decoding unit that decodes video information descrambled by the descrambler 4. Numeral 8 denotes control means implemented by a CPU or the like, which acquires control information such as EMM, ECM, SI, etc., separated from the transport stream by the demultiplexing means 3, creates a program table list, and receives the receiving means 2 And the descrambler 4. Reference numeral 9 denotes a storage unit including a memory, which is used as a table when the control unit 8 creates a program table. Reference numeral 10 denotes a conditional access control unit, which includes an IC card for storing a viewer's contract form and contract status, and sets a key for a program which has a right to receive according to the viewer's age restriction, a contract channel, and a contract program. Generate and enable reception. Reference numeral 12 denotes a screen generation unit, which generates screen information such as a program table generated by the control unit 8. Reference numeral 13 denotes a synthesizing unit, which is a video signal of a CS broadcast decoded by the video decoding unit 7 and an OSD (On Screen Displa) generated by the screen generating unit 12.
The video signal of y) is synthesized. 14 is a video output means,
The video signal synthesized by the synthesizing means 13 is output as an image on a screen.

Next, the operation will be described. The CS broadcast received by the CS antenna 1 is selected by a tuner or a front end of the receiving means 2, a desired broadcaster's broadcast is selected, and a radio wave modulated by QPSK is demodulated during transmission. The demultiplexing unit 3 separates video information and audio information from the MPEG-2 transport stream obtained by the demodulation operation of the receiving unit 2,
M, ECM (Entitlement Control Message) and SI (program information) are separated. The control means 8 uses the EMM or ECM
And the SI, and transfers the contents of each packet to the conditional access control means 10. When it is determined by the operation of the conditional access control unit 10 described later that the program corresponds to the viewable contract, the control unit 8 sends key information to the descrambler 4. The descrambler 4 receives the key information supplied from the control means 8, and descrambles the scramble applied to the video information and the audio information.

[0013] This scramble is to encrypt a video signal and an audio signal in advance when a broadcaster transmits a broadcast signal. When a broadcast program that does not correspond to the content is viewed, the encryption is not released, and only a highly confidential image is displayed when the screen is viewed. As a result, unauthorized viewing can be prevented.

The audio decoding means 5 decodes the audio information output from the descrambler 4 and returns it to an analog audio signal. The audio output means 6 is the audio decoding means 5
The analog audio signal output from is output as sound.
The video decoding means 7 decodes the video information output from the descrambler 4 and returns it to an analog video signal. This analog video signal is output to the synthesizing unit 13, and the OS generated by the screen generating unit 12 as necessary.
It is combined with the D video signal.

The video signal synthesized by the synthesizing means 13 is output to the video output means 14, and the video output means 1
Reference numeral 4 shows a broadcast image in which the OSD screen is superimposed as necessary.

The conditional access control means 10 usually includes a contract management module such as an IC card, and updates contract information of an IC card by receiving EMM (individual information) and a program to be subjected to conditional access by receiving ECM (common information). Generate a key for viewing. The EMM contains contract management information sent to individual contractors. EMM of contract change
At the time of reception, when the contents of the EMM are transferred to the IC card, the contract information held by the IC card is updated. As a result, contract information different for each individual contractor is stored in the IC card. When receiving a program, E
The CM is acquired, and the contents of the ECM are transferred to the IC card to confirm whether or not reception is possible. If a contract is made and the content of the program matches the contract, key information for descrambling is generated from the IC card. If the program is a program that can be purchased immediately, that is, a PPV program, it notifies the receiver that the program can be purchased. The receiver confirms the purchase intention to the viewer, and if the purchase intention is confirmed, I
The purchase processing is performed on the C card. The storage means 9 includes a memory, and the EMM or EC obtained by the demultiplexing means 3
M and SI are temporarily stored.

A conventional broadcast receiving apparatus is configured as described above, and can enjoy various programs from a large number of channels exceeding 100 channels. Also,
In order to make it easy to check the program status of a large number of channels and the actual contract status, the STB displays a program guide on the screen of the receiving device, a so-called electronic program guide function (so-called E program).
PG) is provided. Actually, depending on the state of the contract, channels that cannot be viewed at all even when selected,
, There are channels that can be purchased in units of programs, channels that have been subscribed and always available for viewing, channels of free broadcasting, and the like. It is desired that these channels be distinguished in channel selection and the electronic program guide. It is only necessary for the receiver to have functions such as excluding from the program table and excluding from channels selected for channels that the user can not watch at all,
In the normal function of CA control, this distinction cannot be known without actually receiving. Such a function is provided by, for example, an IC having a broadcast receiving device mounted thereon, such as a scrambled broadcast receiving device disclosed in Japanese Patent Application Laid-Open No. 7-255046.
This is possible by making an inquiry to the card.

That is, the control means 8 shown in FIG. 11 instructs the conditional access control means 10 to read out the contract information from the IC card, and the IC card outputs the contract information to the control means 8 according to this instruction. The control means 8 generates a contract list to be displayed on the screen based on the contract information.
It controls the screen generation means 12. The screen generation means 12 generates contract list display information for performing OSD display based on this control. The synthesizing unit 13 outputs the contract list display information to the video output unit 14 and displays the contract list on the screen.

As described above, when the inquiry about the contract list stored in the IC card is made, the contract is made for each channel (for example, FIG. 12).
In the example of (a) 100), the contract list can be displayed without any trouble. This is because program management IDs generally assigned to channels and programs are different from IDs used for contracts and purchases, but in the case of individual channels, they have a correspondence relationship.

However, for example, as shown in FIG. 12A, when a plurality of channels 200, 300, and 400 are contracted collectively, the ID of a contract list given collectively to these plural channels is provided. (This FIG. 12
(10200 in the example of (a)) is the individual channel 20
Service ID individually assigned to 0, 300, 400
Is given without any correspondence, and FIG.
As schematically shown in FIG. 2 (b), the IC card storing this contract list only discloses its input / output specifications, and discloses the data processing method in the card. Since there is no
Reading from the card and trying to generate the IDs of the individual channels included in the collective contract based on the data of the collectively contracted list cannot be performed. For this reason, if multiple channels are contracted at once, the contract status of the individual channels that make up the collective contract is not known, and it is not sufficient to confirm the channel contract status Did not get.

Further, a configuration for realizing an interactive service in broadcasting has been proposed. For example, a script format language or a method of multiplexing and transmitting operation information to a broadcast is used. Depending on the result of operation and selection by the viewer,
This enables operations such as changing the OSD display and reception state to be presented. In the general interactive service method, it is possible to present information and images that the user prefers according to the selection of the viewer. However, in order to present information and images privilegedly to a specific viewer, a telephone call is required. It was necessary to deliver information from the terminal to the center via a line, and to perform processing such as transmitting an EMM enabling a specific viewer to view the program.

[0022]

The mechanism for confirming the contract status as described above generally depends on information obtained via a low-speed interface such as an IC card. The information on the contract and the purchase is managed separately from other information including the user operation and the SI. This is because contracts and purchases involve billing and are not linked to other information in order to ensure the security of the contractor or broadcaster. For this reason, a list of contracted channels is obtained from the IC card in a lump,
In the method of obtaining the contract status by comparing this content with the SI information, reliable information may not be obtained in the case of a collective contract as described above.

Also, a method has been proposed in which CA information for special contract confirmation is transmitted and the individual contract status is confirmed by referring to this from the SI.
When a low-speed interface such as an IC card is used, and the access speed of the IC card is slow and requires several hundred msec, when the number of target channels is large or when many inquiries are made continuously, A great deal of time is required from when an inquiry is made to when a response is obtained, and the inquiry cannot be made at a speed that can be practically used. In order to obtain CA information,
After obtaining an ECM (common information) and a specific CA (conditional reception control) packet, it is necessary to access an IC card or the like, which has a problem that it takes several seconds to several tens of seconds. For example, if a program guide is presented and the contract status is to be checked for all the programs displayed in the program guide, the acquisition of the CA packet and the I
Since communication with the C card is performed, it takes several tens of seconds to complete the display, which is not practical.

The contract information used for CA control is as follows:
In many cases, the information is transmitted by individual information, and the change of the content is managed only by the CA control module. Normally, all the contract information is once read out to the memory of the STB, and this memory is usually referred to when an inquiry is made. However, since the STB does not know when the content has been updated, it has been necessary to periodically repeat the confirmation process in order to display the contract status to the user.

Further, regarding the operation of the interactive service, in addition to the method shown in the description of the above-mentioned conventional example, an upstream line such as a telephone line (an information transmission path from an individual viewer to a broadcasting company) is used. Instead of using such a function, it is conceivable to use only the function of the receiving terminal to privilegely provide the image / audio information to a specific viewer. According to this, a service that looks like an interactive service from the viewer side becomes possible, and by answering the quiz, a specific program can be viewed or a bonus can be received by watching a serial drama every time. Such services can be provided without using a telephone line or the like. However, in the related art, it is impossible to provide such a form of service.

The present invention has been made in order to solve the above-mentioned problems of the related art, and can display the contract status of a program at a practical speed, and can also be used when a plurality of channels are collectively contracted. Broadcast receiving apparatus, a contract information processing method for a broadcast receiving apparatus, and a contract information processing program storage medium for a broadcast receiving apparatus that can display a contract list of individual channels even more, and that can more effectively utilize information on contracts The purpose is to get.

[0027]

According to a first aspect of the present invention, there is provided a broadcast receiving apparatus capable of receiving a broadcast based on a receiving contract with a broadcaster. Receiving means for outputting a transport stream for transmitting information of the received broadcast, and demultiplexing for demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream Means, a contract ID acquiring means for extracting a contract ID corresponding to a specific channel or a program from the program information extracted by the demultiplexing means, and a contract state acquiring means for acquiring a list of contracted contract IDs from the contract management module And a contract collator for collating a contract ID corresponding to the channel or the program with a list of contracted contract IDs. With the door, when performing display based on the program information, in which to perform the display that reflects the contract status of the display target channel or program.

According to a second aspect of the present invention, there is provided the broadcast receiving apparatus according to the first aspect of the present invention, in which a non-receivable channel or program is not presented when selecting a channel and presenting program information. It is something to do.

A broadcast receiving apparatus according to a third aspect of the present invention is a broadcast receiving apparatus capable of receiving a broadcast based on a reception contract with a broadcaster, and receiving the broadcast.
Receiving means for outputting a transport stream for transmitting information of the received broadcast, contract status updating means for changing management information of a contract management module based on information relating to an action accompanying a viewer's program viewing, Limited viewing means for enabling preferential treatment, preferential treatment, and preferential viewing only when the information on the program viewing action satisfies a certain condition is provided.

According to a fourth aspect of the present invention, there is provided a contract information processing method for a broadcast receiving apparatus, comprising: receiving means for receiving a broadcast and outputting a transport stream of the received broadcast for transmitting information; Multiplexing / demultiplexing means for demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream, so that a broadcast can be received based on a receiving contract with a broadcaster. A contract ID corresponding to a specific channel or a program from the program information extracted by the demultiplexing means.
From the contract management module
D is obtained, and the contract ID corresponding to the channel or the program is compared with a list of contracted contract IDs,
When displaying based on program information, a display reflecting the contract status of the display target channel or program is performed.

A contract information processing method for a broadcast receiving apparatus according to a fifth aspect of the present invention is the contract information processing method for a broadcast receiving apparatus according to the fourth aspect. It is intended to eliminate the presentation of impossible channels or programs.

Further, the contract information processing method for a broadcast receiving apparatus according to the invention of claim 6 of the present application comprises receiving means for receiving a broadcast and outputting a transport stream of the received broadcast for transmitting information. A contract information processing method for a broadcast receiving apparatus, comprising: a broadcast receiving apparatus for receiving a broadcast based on a receiving contract with a broadcaster; Is changed to enable preferential treatment, preferential treatment, and preferential viewing only when the information on the program viewing action satisfies certain conditions.

The contract information processing program recording medium of the broadcast receiving apparatus according to the invention of claim 7 of the present application receives a broadcast and outputs a transport stream of the received broadcast for transmitting information. Means for demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream, and receiving the broadcast based on a receiving contract with a broadcaster. A contract information processing program recording medium for a broadcast receiving apparatus, wherein a contract ID corresponding to a specific channel or a program is extracted from the program information extracted by the demultiplexing means, and a contracted contract is obtained from a contract management module. A list of IDs is acquired, and a list of contract IDs corresponding to the channel or program and a list of contracted contract IDs are acquired. Recording a program for matching, when performing display based on the program information, in which to perform the display that reflects the contract status of the display target channel or program.

The contract information processing program recording medium for a broadcast receiving apparatus according to the invention of claim 8 of the present application is provided by claim 7
In the above described recording medium for a contract information processing program of a broadcast receiving apparatus, when a channel selection operation and program information are presented, presentation of unreceivable channels or programs is excluded.

The contract information processing program recording medium of the broadcast receiving apparatus according to the ninth aspect of the present invention receives a broadcast and outputs a transport stream of the received broadcast for transmitting information. A contract information processing program recording medium for a broadcast receiving device having means for receiving a broadcast based on a receiving contract with a broadcaster, wherein the contract management is performed based on information on an act of the viewer accompanying the program viewing. The management information of the module is changed to record a program enabling preferential treatment, preferential treatment, and preferential viewing only when the information on the program viewing action satisfies a certain condition.

[0036]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. In the first embodiment, SI (program information)
By including information about the contract, the contract status of channels and programs can be displayed at a practical processing speed, and even if multiple channels are contracted collectively,
The contract status of each channel can be displayed.

FIG. 1 shows the configuration of a broadcast receiving apparatus according to Embodiment 1 of the present invention, which has the same block configuration as a conventional apparatus. In FIG.
Reference numeral 1 denotes a CS antenna, and 2 denotes a receiving means for decoding a CS broadcast received by the CS antenna 1 and has a front end such as a tuner.
SK (4-phase phase shift keying) demodulation is performed. Reference numeral 3 denotes a demultiplexing unit, which converts video information, audio information, and E from the MPEG2 transport stream output from the receiving unit 2.
MM (Entitlement Management Message) and ECM (Entit
lement Control Message) and SI. Reference numeral 4 denotes a descrambler that descrambles video information and audio information output from the demultiplexing unit 3 using key information. Reference numeral 5 denotes audio decoding means for decoding audio information descrambled by the descrambler 4. Reference numeral 6 denotes an audio output unit which outputs an audio signal decoded by the audio decoding unit 5 as a sound. Reference numeral 7 denotes a video decoding unit that decodes video information descrambled by the descrambler 4. Reference numeral 8 denotes control means implemented by a CPU or the like, and EMM, 8 separated from the transport stream by the demultiplexing means 3.
It acquires control information such as ECM and SI, creates a list of program guides, and controls the receiving means 2 and the descrambler 4. Reference numeral 9 denotes a storage unit comprising a memory,
Is used as a table when creating a program guide. Reference numeral 10 denotes a conditional access control means, which includes an IC card for certifying that the viewer is a legitimate viewer to a viewer who has contracted with the broadcaster, Limited reception that enables reception of only contract programs is enabled. Reference numeral 12 denotes a screen generation unit, which generates screen information such as a program table generated by the control unit 8.
Reference numeral 13 denotes a synthesizing unit that synthesizes a CS broadcast video signal decoded by the video decoding unit 7 and an OSD (On Screen Display) video signal generated by the screen generation unit 12. Reference numeral 14 denotes a video output unit,
And outputs the video signal synthesized as a video on the screen. Reference numeral 15 denotes a contract ID acquiring unit, which acquires a contract ID related to a specific program or channel from the program information (SI) obtained by the demultiplexing unit 3. Reference numeral 16 denotes a contract status acquisition unit, which acquires, from the conditional access control unit 10, information on the current contract held by the terminal, typically, a list of contracted or purchased contract IDs, and stores the list. Reference numeral 17 denotes a contract collation unit that compares information included in the contract ID acquisition unit 15 and information included in the contract state acquisition unit 16 to determine whether a predetermined contract ID has already been contracted or purchased.

Next, the operation will be described. The CS broadcast received by the CS antenna 1 is selected by a tuner or a front end of the receiving means 2, a desired broadcaster's broadcast is selected, and a radio wave modulated by QPSK is demodulated during transmission. The demultiplexing unit 3 separates video information and audio information from the MPEG-2 transport stream obtained by the demodulation operation of the receiving unit 2,
M (Entitlement Management Message) and ECM (Entitlement
ment Control Message) and SI (program information). The control means 8 receives the EMM, ECM and SI,
If it is determined that the program corresponds to the viewable contract, the key information is sent to the descrambler 4. The descrambler 4 receives the key information supplied from the control means 8, and descrambles the scramble applied to the video information and the audio information.

This scramble is to encrypt a video signal or the like in advance when a broadcaster transmits a broadcast signal. If you watch a broadcast program that does not apply, this encryption will not be decrypted, and even if you look at the screen, only a highly confidential image will be displayed, so to abandon continuing to watch it except for authorized subscribers As a result, unauthorized viewing can be prevented.

The audio decoding means 5 decodes the audio information output from the descrambler 4 and returns it to an analog audio signal. The audio output means 6 is the audio decoding means 5
The analog audio signal output from is output as sound.
The video decoding means 7 decodes the video information output from the descrambler 4 and returns it to an analog video signal. This analog video signal is output to the synthesizing unit 13, and the OS generated by the screen generating unit 12 as necessary.
It is combined with the D video signal. The video signal synthesized by the synthesizing unit 13 is output to the video output unit 14, and the video output unit 14 displays the OSD screen superimposed broadcast image as necessary.

The conditional access control means 10 uses an IC card (in order to confirm that the viewer is a legitimate viewer, to check the contract status transmitted from the broadcaster to the viewer who has made a contract with the broadcaster. This conditional access control means 10
, The ID information for viewer collation recorded on the IC card is read by the conditional access control means 10 and collated by the conditional access control means 10. As a result of the comparison, if a contract is made and the content of the program matches the contract, key information for descrambling stored in the IC card is read from the IC card. The storage unit 9 includes a memory, and stores the EMM, ECM, and SI obtained by the demultiplexing unit 3.

Although a series of these operations are the same as those of the conventional one, in the first embodiment, individual contract information can be queried at a speed suitable for practical use by the following method. That is, by referring to the contract ID list included in the SI (program information) in the transport stream, the contract information can be displayed at a higher speed than when referring to the IC card. Also in this case, it is possible to reliably display the contract information on each channel included in the collective contract.

FIG. 2 schematically shows the format of ECM (common information). 102 is an ES-PID, which is an ID for extracting an elementary stream such as video and audio. Reference numeral 103 denotes a CAS-ID, which is an ID indicating the type of CA used. Reference numeral 104 denotes type information, which indicates a type such as a contract ECM or a PPV ECM. 105
Is an ID list, which is an ID for viewing the program. Reference numeral 106 denotes rating, which is information for limiting the age of the viewer. Reference numeral 107 denotes a copy guard, which is information for restricting unlimited copying for protecting copyright of video information.

FIG. 3 shows an EIT (Event Information Format) which is included in SI (program information) and describes information on each program.
on Table) is shown schematically. 202 is eve
nt-ID, indicating the start time of the program and the like. 203 is the start time of the program, 204 is the program name, and 205 is the first embodiment.
, Is a contract information to be newly added, in which a list of contract types and contract IDs having a right to view this program are described.

Then, as shown in FIG. 4, the processing when the common information shown in FIG. 2 is received is as follows. First, in step S1, an ECM is received. Next, in step S2, the received ECM information is notified to the conditional access control unit 10 in FIG. Thus, the received ECM information is notified to the IC card included in the conditional access control unit 10. Next, in step S3, data is input / output between the conditional access control unit 10 and the IC card. As a result, the contract status stored from the IC card is read in advance. Then, in step S4, a response from the conditional access control unit 10 is received, and
If it is determined in step 5 that there is key information in the response, in step S6, the descrambler 4 shown in FIG.
Is set, and as a result, the reproduction of the program is started.
If it is determined in step S5 that there is no key information, it is determined in step S7 whether or not the key is PPV.
If it is determined that the program is PPV, the purchase is confirmed in step S8. If the viewer purchases the program, the fact is transmitted to the IC card. The IC card stores the purchase information, and after a certain period of time, the purchase information is transmitted to the broadcaster side via a telephone line or the like connected to the STB and is charged. In contrast, step S7
If it is determined that is not a PPV in step S9, in step S9, the reason for the inability to reproduce, such as no contract, is displayed.

Next, as shown in FIG. 5, the process for confirming the contract status of the program from the program information shown in FIG. 3 is as follows. First, step S11 is a step of starting the processing of the program information, which is triggered by the display processing of each cell in the display of the program search result. Next, step S12 refers to the free CA mode of EIT. Next, in step S13, it is determined whether or not the subject is a subject of CA. Step S14 is a step of extracting a contract information descriptor from the EIT when it is determined in step S13 that the contract information is the subject of CA. Step S15 is a step of determining that the program is free (no contract required) when it is determined in step S13 that the program is not subject to CA. Step S16 determines whether or not a contract information descriptor exists, that is, step S14.
Is a step of determining whether or not the contract information descriptor has been successfully extracted from the EIT. Step S17 is step S1
6 is a step of determining the contract type when the presence of the contract information descriptor can be detected. In this step, a contract program / channel whose viewability is determined by a prior contract and a program / channel that can be immediately purchased are determined. Classify. In step S18, when the presence of the contract information descriptor cannot be detected in step S16, it is determined that the contract state is unknown. Step S19 is contract collation means 1.
The operation of step S7 is a step of collating with the contract list held in the contract status acquisition means 16 when it is determined in step S17 that the contract type is a contract in units of channels. Step S20 is an operation of the contract collation means 17. If it is determined in step S17 that the contract type is a target of PPV or PPS (Pay Per Series: purchase of a plurality of program groups), a step of collating with the contract list is performed. Step S21 is a step of determining whether there is a match as a result of collation with the contract list in step S19, and step S22 is step S2.
Step 1 determines that a contract has been made if there is a match, as a result of the determination in Step 1. Step S23 determines that there is no contract if there is no match as a result of the determination in Step S21. Step S24 is a step of judging whether or not there is a match as a result of collation with the contract list in step S20. Step S25 is a contract if the result of judgment in step S24 indicates that there is a match. (Or purchased), step S2
Step 6 is a step of determining that a purchase is necessary when there is no matching result as a result of the determination in step S24.

As a result of such processing, the program information (SI)
By obtaining the contract ID of a specific program or channel, the contract status of the program or channel can be known without passing through the low-speed interface of the conditional access control unit. Improve user operability by discriminating the display in the channel list or program table according to the contract status, or by hiding programs or channels that cannot be viewed because no contract has been made. be able to.

Next, as shown in FIG. 6, the program contract list is updated as follows. This is the contract status acquisition means 1
6 is the operation. First, step S31 is a step of performing a process of receiving individual information, and step S32 is a step of transmitting the individual information obtained in step S31 to the limited reception control unit 1.
0, and step S33 is step S3.
Inputting / outputting the individual information transferred to the conditional access control means 10 to / from the IC card in step 2, step S
34 is a step of judging whether or not there is a contract change by inputting / outputting individual information with the IC card in step S33, and step S35 is a control means when it is determined in step S34 that there is a contract change. 8 is a step in which the conditional access control means 10 notifies the fact, and step S36 is a step of performing a contract list updating process in step S35.

When the viewer renews the contract, the contract list can be updated accordingly. The unnecessary update operation of the contract information is eliminated, and when the update is necessary, the change is immediately reflected.

In the conditional access control means 10 of the prior art,
From the standpoint of security, even if the contract contents are updated due to the reception of individual information or the expiration of the preset contract expiration date, the receiver will not be notified of the change, and the receiver will not be notified of the change Could not know. Therefore, in order to monitor the contract status,
It was necessary to inquire the C card or the like, and even if there was an update, the change was not immediately reflected. However, the conditional access control means 10 detected the change in the contract, or the IC card etc. , It is possible to immediately perform the operation of acquiring the contract status and reflect the update when the contract is changed.

As described above, according to the first embodiment, the contract information including the contract ID is provided in the ID list included in the SI (program information) in the transport stream, and the receiver refers to the contract information. At the same time, by referring to the contract status read from the IC card in advance, the contract status of a specific program or channel can be known. Therefore, even when a contract is made for a plurality of channels at a high speed without individually inquiring the IC card, the contract information for each of the channels can be reliably displayed. . Also, since only the contract ID is included in the program information and does not include key information for actually performing descrambling, confidentiality of conditional access control can be ensured.

Embodiment 2 In the second embodiment, an interactive function can be easily realized by effectively using contract information. FIG. 1 shows a configuration of a broadcast receiving apparatus according to a second embodiment of the present invention, which has the same block configuration as a conventional apparatus. FIG. 7 shows the E used in the second embodiment.
This shows the format of the CM. In FIG.
The same reference numerals as those in FIG. 2 indicate the same components. 201 to 20
4 is added in the format of FIG.
1 is a sub ID, 202 is operation information, 203 is sub data, and 204 is an expiration date.

FIG. 8 is a flowchart showing the operation in the second embodiment. In FIG. 8, S41 is EC
Step for starting reception processing of M, S42 is Step S4
S43: a step of determining the presence or absence of a subfield in the ECM, S44: a step of retrieving subdata by ID or newly creating subdata from the storage unit, S45. Is a step of determining the type of operation type, S46 is a step of updating the sub-data of the storage means by calculation, S47 is a step of calculating the sub-data of the storage means and sub-data in the ECM, and S48 is a result of the calculation. The step of determining authenticity, S49, is a step of performing a normal ECM reception process.

FIG. 9 shows updating of sub data by SI, where 301 is an option, 302 is a text character string,
303 is a sub ID, 304 is an operation, 305 is sub data, and 306 is an expiration date.

FIG. 10 shows an example of a simple quiz for a viewer to answer for conditional access. In the figure, reference numeral 401 denotes a screen of a TV receiver, and 402 denotes a quiz question. An example is the question that asks about the US capital. Numerals 403, 404, and 405 are options for the answer. In this example, New York, Washington, and Los Angeles are displayed as options. The viewer selects the correct answer from the above with the remote control, and if the answer is correct, for example, the pay program can be viewed once for free or the ending of the program can be viewed.

Next, the operation will be described. From the program selected and received by the CS antenna 1 and the receiving means 2 in FIG. 1, information such as EMM, ECM, SI, etc. is extracted from the transport stream by the demultiplexing means 3 and sent to the control means 8. However, in this control means 8,
The processing shown in FIG. 8 is performed on the ECM shown in FIG.

That is, first, in step S42, the ECM information received in step S41 is transferred to the conditional access control means 10. Next, in step S43, the conditional access control unit 10 stores the subfield information in the ECM information, that is, the sub ID 201 and the operation type information 20 in FIG.
2. It is determined whether or not the sub data 203 is included. If it is determined in step S43 that there is no subfield information, the control unit 8 immediately proceeds to step S43.
The process shifts to 49, and shifts to normal ECM reception processing. On the other hand, if it is determined in step S43 that the sub-field information is included, the control unit 8 searches the sub-data from the storage unit 9 in FIG. 1 based on the sub-ID in step S44. If this is not found as a result of this, this sub data is newly created. Then, in step S45, the type of operation is determined, and the type of operation is “+ =”, “−” in the C language notation.
= ”,“ * = ”,“ & = ”,“ | = ”,“ << = ”,
If it is determined to be a change operation such as “>> =”, step S4
6, the sub-data in the storage means 9 is updated by calculation,
Thereafter, the process proceeds to a normal ECM receiving process in step S49. On the other hand, in step S45, the operation type is “&”, “|”,
“&&”, “||”, “==”, “! =”, “<”,
If it is determined that the comparison operation is “>”, “<=”, “> =”, etc., the control unit 8 calculates the sub data in the storage unit 9 and the sub data in the ECM in step S47.
These steps S44, S45, S46 and S47 are the operations of the contract status updating means (corresponding to the control means 8). In step S48, it is determined whether the calculation result is true or false. If the control means 8 determines that the calculation result is false, it is determined that the viewing of the program is impossible, and the subsequent processing is not performed. On the other hand, if the control means 8 determines in step S48 that the calculation result is true, the process shifts to normal ECM reception processing in step S49, and the program can be viewed. Steps S48 and S49 are functions of the limited viewing means.

By performing such processing, for example, the viewer sends an answer to the quiz shown in FIG. 10 using the remote controller, and if the answer is correct, an interactive function, that is, for example, the next serial drama is executed. It is possible to easily realize two-way information exchange between the broadcaster and the viewer, who can view for free or cannot view a specific ending without correctly answering the quiz.
These series of processes do not require an upstream line such as a telephone line (an information transmission path from an individual viewer to a broadcaster) and can be realized only by the function of the terminal, so that a simple realization is possible. .

In addition, functions that are advantageous for the business promotion of the broadcaster, such as not being able to view a program unless a commercial is viewed, or preventing the next program from being viewed unless a continuous program is viewed each time. Can be easily realized, and a broadcast receiving apparatus that is highly convenient for each of the viewer and the broadcaster can be realized.

[0060]

As described above, according to the broadcast receiving apparatus according to the first aspect of the present invention, a broadcast receiving apparatus that can receive a broadcast based on a receiving contract with a broadcaster can broadcast the broadcast. Receiving means for receiving and outputting a transport stream for transmitting information of the received broadcast, and demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream Demultiplexing means, a contract ID obtaining means for extracting a contract ID corresponding to a specific channel or a program from the program information extracted by the demultiplexing means, and a contract for obtaining a list of contracted contract IDs from the contract management module. Contract for collating state acquisition means, a contract ID corresponding to the channel or program, and a list of contracted contract IDs When performing display based on the program information, a display reflecting the contract status of the channel or program to be displayed is performed, so that the display is included in the program information transmitted along with the broadcast. A broadcast receiving device that can display the contract status using the contract information and can quickly and accurately display the contract status for each of a large number of channels and the contract status of each channel when a plurality of channels are collectively contracted is obtained. effective.

According to the broadcast receiving apparatus of the second aspect of the present invention, in the broadcast receiving apparatus according to the first aspect, at the time of selecting a channel and presenting program information, presenting a non-receivable channel or program. The broadcast receiving device that can present only channels or programs that are actually viewable can be prevented because a reception contract has not been concluded and channels or programs that cannot be received can be prevented from being presented. There is an effect that can be obtained.

Further, according to the broadcast receiving apparatus of the third aspect of the present invention, the broadcast receiving apparatus which can receive the broadcast based on the receiving contract with the broadcaster receives the broadcast, and receives the broadcast. Receiving means for outputting a transport stream for transmitting information of a broadcast, a contract status updating means for changing management information of a contract management module based on information on an action accompanying a viewer's program viewing, and program viewing / listening Limited access means that allows preferential treatment, preferential treatment, and preferential viewing only when the information on the act satisfies certain conditions is provided. Viewing is possible,
There is an effect that a broadcast receiving apparatus capable of performing conditional access, which is advantageous for each of the broadcaster and the viewer, can be obtained.

Further, according to the contract information processing method for a broadcast receiving apparatus according to the invention of claim 4 of the present application, receiving a broadcast, and outputting a transport stream of the received broadcast for transmitting information. Means for demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream, and receiving the broadcast based on a receiving contract with a broadcaster. A contract information processing method for a broadcast receiving apparatus, wherein a contract ID corresponding to a specific channel or a program is extracted from the program information extracted by the demultiplexing unit, and a contract ID of the contracted contract ID is extracted from the contract management module. A list is obtained, the contract ID corresponding to the channel or the program is checked against a list of contracted contract IDs, and When performing a display based on a contract, the contract status of the target channel or program is reflected, so the contract status is displayed using the contract information included in the program information transmitted along with the broadcast This makes it possible to obtain a contract information processing method for a broadcast receiving apparatus that can quickly and accurately display the contract status of each of a large number of channels or the contract status of individual channels when a plurality of channels are collectively contracted.

Further, according to the contract information processing method for a broadcast receiving device according to the invention of claim 5 of the present application, in the contract information processing method for a broadcast receiving device according to claim 4, when selecting a channel and presenting program information. , The presentation of unreceivable channels or programs has been excluded, so that it is possible to prevent the presentation of unreceivable channels or programs that have not been subscribed to, and to prevent the presentation of unreceivable channels or programs. Alternatively, there is an effect that a contract information processing method for a broadcast receiving apparatus capable of presenting only a program is obtained.

Further, according to the contract information processing method for a broadcast receiving apparatus according to the invention of claim 6 of the present application, a reception for receiving a broadcast and outputting a transport stream of the received broadcast for transmitting information. Means for receiving a broadcast based on a receiving contract with a broadcaster, the contract information processing method for a broadcast receiving apparatus, comprising: The management information has been changed to allow preferential treatment, preferential treatment, and preferential viewing only when the information related to the program viewing activity satisfies certain conditions. It is possible to obtain a preferential treatment and preferential viewing, and to obtain a contract information processing method for a broadcast receiving apparatus that enables limited reception which is advantageous for each of a broadcaster and a viewer.

Further, according to the contract information processing program recording medium of the broadcast receiving apparatus according to the invention of claim 7 of the present application, a broadcast is received, and a transport stream for transmitting information of the received broadcast is output. And a demultiplexing unit for demultiplexing the transport stream output by the receiving unit and extracting program information from the transport stream. A contract information processing program recording medium for a broadcast receiving apparatus, wherein a contract ID corresponding to a specific channel or a program is extracted from the program information extracted by the demultiplexing unit, and a contract ID is obtained from a contract management module. A list of contract IDs is obtained, and a contract ID corresponding to the channel or program is obtained;
A program for collating with a list of contracted contract IDs is recorded, and when displaying based on program information, the display reflecting the contract status of the channel or program to be displayed is performed. The contract status can be displayed using the contract information included in the program information transmitted by the system, and the contract status for each of a large number of channels and the contract status of individual channels when multiple channels are contracted at once can be displayed quickly and accurately. There is an effect that a contract information processing program recording medium of the broadcast receiving device which can be displayed is obtained.

According to the contract information processing program recording medium for a broadcast receiving device according to the invention of claim 8 of the present application, the broadcast receiving device contract information processing program recording medium according to claim 7 includes: When presenting the information, the presentation of unreceivable channels or programs is excluded, so that it is possible to prevent the user from not presenting unreceivable channels or programs without signing a reception contract. There is an effect that a contract information processing program recording medium of a broadcast receiving apparatus that can present only viewable channels or programs can be obtained.

According to the contract information processing program recording medium for a broadcast receiving apparatus according to the ninth aspect of the present invention, a broadcast is received, and a transport stream for transmitting information of the received broadcast is output. A broadcast receiving apparatus for receiving a broadcast based on a receiving contract with a broadcaster, the information processing program recording medium comprising: The management information of the contract management module has been changed to record a program that allows preferential treatment, preferential treatment, and preferential viewing only when the information on the program viewing activity satisfies certain conditions. Broadcast, which enables preferential treatment, preferential treatment, and preferential viewing by effectively using The effect of the contract information processing program storage medium of the receiving device is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a broadcast receiving device according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a format of an ECM.

FIG. 3 is a diagram showing an SI format.

FIG. 4 is a diagram showing a flowchart of processing of common information.

FIG. 5 is a diagram showing a flowchart of a program contract status confirmation process.

FIG. 6 is a diagram showing a flowchart of a contract list update process.

FIG. 7 is a diagram showing an ECM format used in the second embodiment.

FIG. 8 is a flowchart showing an operation in the second embodiment.

FIG. 9 is a diagram showing an SI format in which sub data can be updated.

FIG. 10 is a diagram illustrating an example of a quiz according to the second embodiment.

FIG. 11 is a flowchart illustrating a configuration of a conventional broadcast receiving apparatus.

FIG. 12 is a schematic diagram showing a correspondence relationship between a contract list and a service ID when a plurality of channels are collectively contracted and when individual channels are contracted.

FIG. 13 is a diagram showing a format of ECM and EMM.

FIG. 14 is a diagram showing types and items of an ECM.

FIG. 15 is a conceptual diagram showing conditional access.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 CS antenna 2 receiving means 3 demultiplexing means 4 descrambler 5 audio decoding means 7 video decoding means 8 control means 9 storage means 10 conditional access control means 15 contract ID acquisition means 16 contract status acquisition means 17 contract collation means

Claims (9)

[Claims] A broadcast receiving apparatus capable of receiving a broadcast based on a reception contract with a broadcaster receives a broadcast, and outputs a transport stream of the received broadcast for transmitting information. Receiving means; demultiplexing means for demultiplexing the transport stream output by the receiving means and extracting program information from the transport stream; and a specific channel or a specific channel from the program information extracted by the demultiplexing means. Contract ID acquisition means for extracting a contract ID corresponding to a program; contract status acquisition means for acquiring a list of contracted contract IDs from a contract management module; contract ID corresponding to the channel or program; and contracted contract ID And a contract matching means for checking against the list of programs. When displaying based on program information, A broadcast receiving apparatus for performing display reflecting a contract status of a channel or a program. 2. The broadcast receiving apparatus according to claim 1, wherein, when selecting a channel and presenting program information, presentation of unreceivable channels or programs is excluded. 3. A broadcast receiving apparatus capable of receiving a broadcast based on a reception contract with a broadcaster, receives a broadcast, and outputs a transport stream of the received broadcast for transmitting information. Receiving means, contract status updating means for changing the management information of the contract management module based on information relating to the act of viewing the program by the viewer, preferential treatment, preferential treatment only when the information concerning the program viewing act satisfies certain conditions And a limited viewing means for enabling preferential viewing. 4. A receiving means for receiving a broadcast and outputting a transport stream for transmitting information of the received broadcast, demultiplexing the transport stream outputted by the receiving means, and And a demultiplexing means for extracting program information from the broadcast information, and a contract information processing method for a broadcast receiving apparatus capable of receiving a broadcast based on a receiving contract with a broadcaster. A contract ID corresponding to a specific channel or program is extracted from the extracted program information, a list of contracted contract IDs is obtained from the contract management module, and a contract ID corresponding to the channel or program and a contracted contract ID are obtained. Of the channel or program to be displayed when displaying based on the program information Contract information processing method of the broadcast receiving apparatus being characterized in that to perform the display was. 5. The contract information processing method for a broadcast receiving apparatus according to claim 4, wherein, when selecting a channel and presenting program information, excluding presentation of unreceivable channels or programs. Contract information processing method. 6. A receiving means for receiving a broadcast and outputting a transport stream of the received broadcast for transmitting information, whereby the broadcast can be received based on a receiving contract with a broadcaster. A contract information processing method for a broadcast receiving apparatus, comprising: changing management information of a contract management module based on information on an action accompanying a viewer's program viewing; and A contract information processing method for a broadcast receiving apparatus, which enables preferential viewing, preferential treatment, and preferential viewing. 7. A receiving means for receiving a broadcast and outputting a transport stream for transmitting information of the received broadcast, demultiplexing the transport stream output by the receiving means, and demultiplexing the transport stream. A contract information processing program recording medium for a broadcast receiving apparatus having a demultiplexing means for extracting program information from among the broadcast information, and capable of receiving a broadcast based on a receiving contract with a broadcaster; Extracts the contract ID corresponding to a specific channel or program from the program information extracted by the above, obtains a list of contracted contract IDs from the contract management module, and obtains a contract ID corresponding to the channel or program and a contracted contract When a program for collating with a list of IDs is recorded and displayed based on program information, the channel to be displayed is displayed. Contract information processing program storage medium of the broadcast receiving apparatus is characterized in that to perform the display that reflects the contract status of the channel or program. 8. The broadcast receiving apparatus according to claim 7, wherein, when selecting a channel and presenting the program information, excluding unreceivable channels or programs is excluded. Recording medium for contract information processing program of receiving device. 9. Receiving means for receiving a broadcast and outputting a transport stream for transmitting information of the received broadcast, wherein the broadcast can be received based on a reception contract with a broadcaster. A contract information processing program recording medium for a broadcast receiving device, wherein management information of a contract management module is changed based on information on an action accompanying a viewer's program viewing, and the information on the program viewing action satisfies a certain condition. A contract information processing program recording medium for a broadcast receiving apparatus, wherein a program for enabling preferential treatment, preferential treatment, and preferential viewing is recorded only in a case.