JP2003153225A - Pay broadcasting charging system and digital broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pay broadcasting charging system that charges viewing fees on a user in response to a viewing time of the user in digital broadcasting. SOLUTION: The digital broadcasting receiver of this invention is provided with an IC card 7 with a limited reception discrimination section 7a for generating an encryption decrypting key from ECM (Entitlement Control Message) data, a descramble section 3 that uses the encryption decrypting key to decrypt a received broadcast signal and a CPU 6 that controls the entire receiver. Every time periodically receiving the ECM data or a confirmation command from the CPU 6, the limited reception discrimination section 7a counts the number of reception times as the number of received ECM data or the number of received confirmation commands, records the counts to a prescribed memory area in the IC card 7 and calculates a viewing time depending on the number of received ECM data or the number of received confirmation commands to decide the viewing fees. When a non-viewing state/viewing state display discrimination section 7a2 for discriminating a setting state of non-viewing state/ viewing state display set by a user operation means discriminates the setting state of the non-viewing state display denoting stop of viewing, the CPU 6 allows the limited reception discrimination section 7a to stop counting the number of received ECM data or the number of received confirmation commands.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pay-broadcast charging system and a digital broadcast receiver for receiving pay-broadcasts, and more particularly, to a pay-per-view rate according to the viewing time of a user such as a PPV (Pay Per View) program. The present invention relates to a pay broadcast charging system and a digital broadcast receiver for charging.

[0002]

2. Description of the Related Art In recent years, digital broadcasting using CS broadcasting and BS broadcasting has been started, and terrestrial waves and CATV have also been studied in the direction of digital broadcasting. In such digital broadcasting, a digital pay broadcasting service that provides each content of video, audio, and data for a fee has already been implemented.

In the pay digital pay broadcasting service, only the user who makes a contract (that is, pays the charge) by encrypting the digital data in the digital pay broadcasting according to an encryption method such as MULTI2 However, the system is such that the encryption can be decrypted by the encryption / decryption key and the digital pay broadcast can be received.
Whether or not there is such a contract is determined by the ECM (Entitlement Control) multiplexed for each digital broadcasting service in the IC card installed in the digital broadcasting receiver.
Data including key information called "Message" is sent, and it is judged by a response from the IC card.
In the case of a user who has a legitimate contract, the encryption / decryption key for decrypting the encryption of the digital broadcast can be acquired from the IC card.

That is, the contract information of the user is previously stored in the IC card, and the ECM data acquired from the broadcast wave when the digital broadcasting service is selected and the contract stored in the IC card. Whether or not there is a contract for the digital broadcasting service is determined based on the information.

[0005] The contract information stored in the IC card is a TS (Tra) to which the pay broadcasting company providing the digital broadcasting service transmits the digital broadcasting service.
nstream Stream (transport stream), EMM (Entitlement Ma)
Each IC of each digital broadcast receiver, which is multiplexed as individual information called “nagement Message”
It is transmitted to the card. On the other hand, in the control section of the digital broadcast receiver, the EMM data transmitted included in the broadcast radio wave is constantly monitored by the number of the mounted IC card, and the EMM received corresponding to the number is monitored. Data is transmitted to the IC card. I
In the C card, new contract information can be recorded by accumulating EMM data in the non-volatile memory area.

[0006] As a program providing format of pay broadcasting, PPV
2. Description of the Related Art A system called “Pay Per View” that charges a viewing fee for each viewing program has been implemented. In the PPV method currently implemented, the viewing fee of the user is charged based on the following procedure.

First, in a digital broadcast receiver, PP
When the transport stream TS of the V-view viewing program is selected, the ECM data multiplexed in the transport stream TS relating to the PPV viewing program is extracted, and the I broadcast from the controller of the digital broadcast receiver is extracted.
When it is sent to the C card, the E
A response indicating that the transport stream TS in which the CM data is multiplexed is a PPV program can be obtained. The response includes information indicating whether the user who is going to view the program can purchase the PPV program, a viewing fee when the user can purchase the PPV program, and the like. In the control unit of the digital broadcast receiver that has received the response to the ECM data from the IC card, in the case of a PPV program that can be purchased, OSD (On-Screen Display) on the TV screen is displayed.
As a result of a display or the like, the user is inquired whether the selected transport stream TS is a PPV program and whether to purchase it. Furthermore, as the OSD display, a viewing fee, availability of recording, and the like are also displayed.

When the user desires to purchase the PPV program, a purchase command indicating that the PPV program being received is purchased is issued to the IC card by a remote control operation or the like. After that, the control unit of the digital broadcast receiver periodically sends the encryption / decryption key information for decrypting the encrypted PPV program as a response to the ECM data that is periodically transmitted to the IC card. You can get it.

Further, in the IC card, the purchase of the PPV program is recorded as viewing history information in a predetermined memory area in the internal non-volatile memory in response to the purchase command, and the viewing history is periodically recorded. Information is uploaded to a host station operated by a broadcaster or the like broadcasting PPV programs through a telephone line connected to the digital broadcast receiver. According to the viewing history information uploaded to the host station, the broadcaster who broadcasts the PPV program charges the user for the viewing fee for the viewed PPV program.

[0010]

However, in the conventional charge calculation of the viewing charge for the PPV program, as described above, the purchase command issued to the IC card by the user operation when the PPV program is purchased. As a result, the viewing of the PPV program is counted, and assuming that all the one PPV program is viewed, the viewing fee for all the PPV programs is calculated and the user is invoiced. It is supposed to be.

Thus, for example, in a long-time PPV program such as a movie, even if the PPV program is stopped for some reason while the PPV program is being viewed,
There is a problem that the viewing charges for all the programs are charged. Further, even for a user who desires to view only a part of the time of a PPV program, the viewing fee for one program is similarly charged.

The present invention has been made in view of the above circumstances, and in viewing a PPV program as a digital pay broadcast, the user is not charged for all the purchased PPV program time. It is possible to calculate the charge for the viewing charge of the PPV program according to the viewing time of the actual viewing.

[0013]

In order to solve the above problems, a pay broadcast charging system according to the present invention and a digital broadcast receiver for realizing the pay broadcast charging system have the following configurations. . That is, the first aspect of the present invention is an IC card having conditional access discriminating means for discriminating conditional information for conditional access and generating an encryption / decryption key for encryption / decryption, and an IC card encrypted for conditional access. Descrambling means for decrypting the input signal that is present by the encryption / decryption key,
A pay-broadcasting billing system for determining a viewing charge of the pay-broadcast viewed by the digital broadcast receiver capable of receiving and viewing the pay-broadcast by at least including a CPU controlling the entire digital broadcast receiver. In, an ECM (Entitlement Control M) for obtaining the encryption / decryption key included in the input signal
Each time the message) data is periodically transmitted from the CPU to the limited reception determination means in the IC card, the limited reception determination means outputs the E
By counting the number of received CM data as the number of ECM receptions and recording them in a predetermined memory area in the IC card, the viewing time can be calculated according to the number of ECM receptions, and the viewing charge can be determined. It is characterized by adopting a system.

Further, in the second invention, in the pay broadcast billing system according to the first invention, the user operation means that can be operated by the user stops the viewing from the middle or the beginning of the pay broadcast program. The ECM reception count is stopped by setting the non-viewing display indicating to that effect and by making the limited reception determining means in the IC card determine the set state of the set non-viewing display. At the same time, it is characterized by adopting a pay-broadcast charging system for stopping viewing of pay-broadcast.

Further, in a third aspect of the present invention, in the pay broadcast billing system according to the second aspect of the present invention, the non-viewing display is restored by the user operation means that can be operated by the user, and the user can view the display. The count of the number of ECM receptions that have been suspended is set by setting the display during watching to the effect to the effect and by determining the set state of the set display during viewing by the limited reception determining means in the IC card. It is characterized by adopting a pay-broadcast billing system for restarting the viewing of the pay-broadcast that has been stopped.

Further, a fourth invention is a digital broadcast receiver capable of realizing the pay broadcast billing system according to any one of the first to third inventions, and determines limited information for limited reception. And an IC card having conditional access determination means for generating an encryption / decryption key for encryption / decryption, and a descrambler for decrypting an input signal encrypted for conditional access with the encryption / decryption key. A CPU for controlling the entire digital broadcast receiver, and further, the limited reception determination means is configured to count and record the ECM reception number and / or set by the user operation means. The digital broadcast receiver is provided with at least means for discriminating between setting states of non-viewing display and viewing display.

Further, a fifth invention is the pay broadcast charging system according to the first invention, wherein each time the ECM data is transmitted from the CPU to the conditional access discrimination means in the IC card. In the CPU, the EC
Count the number of M data transmissions as the number of ECM transmissions,
By recording in a predetermined memory area in the CPU,
The present invention is characterized in that a pay-broadcast billing system capable of displaying a viewing time and / or a viewing charge of the pay broadcast on the screen of the digital broadcast receiver.

Further, a sixth aspect of the present invention is the pay broadcast charging system according to the second and fifth aspects, wherein the CPU determines the setting state of the non-viewing display, thereby the number of ECM transmissions. It is characterized by a pay-broadcast billing system that stops the counting of.

Furthermore, a seventh aspect of the present invention is the pay broadcast charging system according to the third and sixth aspects, wherein the setting state of the display during viewing is stopped by the CPU, thereby canceling the setting. The present invention is characterized in that a pay-broadcast billing system is used for restarting the counting of the number of ECM transmissions.

Furthermore, an eighth invention is the digital broadcasting receiver according to the fourth invention, further capable of realizing the pay broadcasting accounting system according to any one of claims 5 to 7. As a receiver, the CPU is provided with counting and recording means for the number of ECM transmissions, and / or
The digital broadcast receiver is provided with at least determination means for determining the setting state of the non-viewing display and the viewing display set by the user operation means.

Further, a ninth aspect of the present invention is an IC card having conditional access discriminating means for discriminating conditional information for conditional access and generating an encryption / decryption key for encryption / decryption, and an encryption for conditional access. It is possible to receive and view pay broadcasts by at least including a descrambling unit that decrypts the encrypted input signal with the encryption / decryption key and a CPU that controls the entire digital broadcast receiver. In a pay broadcast billing system that determines a viewing charge of the pay broadcast viewed by a digital broadcast receiver, the CPU periodically sends a request signal to the CPU from the conditional access determination means in the IC card. Each time the confirmation command transmitted to the limited reception determination means in the IC card is transmitted to the limited reception determination means, By counting the number of confirmation commands received as the number of confirmation commands received and recording them in a predetermined memory area in the IC card, the viewing time can be calculated according to the number of confirmation commands received and the viewing fee can be determined. It is characterized by using a broadcasting billing system.

Furthermore, a tenth aspect of the present invention, in the pay broadcast billing system according to the ninth aspect, stops viewing from the middle or the beginning of a pay broadcast program by user operation means that can be operated by the user. The count of the number of confirmation commands received is stopped by setting the non-viewing display indicating the effect, and by making the limited reception determining means in the IC card determine the set state of the non-viewing display that has been set. In addition to the above, the present invention is characterized by adopting a pay-broadcast charging system in which viewing of the pay-broadcast is stopped.

Further, an eleventh invention is, in the pay broadcast billing system according to the tenth invention, restored by the user operation means operable by a user so that the non-viewing display can be restored for viewing. The limited reception discriminating means in the IC card discriminates the number of confirmation command receptions that have been canceled by setting the display during in-view display to that effect, and by discriminating the set state of the display during in-view. The present invention is characterized in that a pay-broadcast charging system is adopted in which counting is restarted and viewing of the suspended pay-broadcast is restarted.

Further, a twelfth invention is the ninth to the first invention.
As a digital broadcast receiver capable of realizing the pay-broadcast charging system according to any one of the inventions of 1), limited reception for determining limited information for limited reception and generating an encryption / decryption key for encryption / decryption An IC card having a discriminating means, a descrambling means for decrypting an input signal encrypted for conditional access by the encryption / decryption key, and a CPU for controlling the entire digital broadcast receiver are provided. ,
Further, the limited reception determination means includes at least a means for counting and recording the number of received confirmation commands, and / or a means for determining the setting status of the non-viewing display and the viewing display set by the user operation means. The digital broadcast receiver is provided as a feature.

Further, a thirteenth invention is the pay broadcast charging system according to the ninth invention, wherein each time the confirmation command is transmitted from the CPU to the limited reception determining means in the IC card. In the CPU, the number of confirmation commands transmitted is counted as the number of confirmation commands transmitted and recorded in a predetermined memory area in the CPU, so that the viewing time and / or viewing fee of the pay broadcast is displayed on the screen of the digital broadcast receiver. It is characterized by a pay broadcast charging system capable of displaying.

Furthermore, a fourteenth invention is the pay broadcast charging system according to the tenth and thirteenth inventions, wherein the CPU transmits the confirmation command by discriminating the setting state of the non-viewing display. It is characterized by a pay-broadcast billing system that stops counting the number.

Further, a fifteenth aspect of the invention is the pay broadcast charging system according to the eleventh and fourteenth aspects of the invention, in which the setting state of the viewing-and-listening display is stopped by making the CPU determine the setting state. The present invention is characterized in that the pay broadcast charging system is used to restart counting the number of confirmation command transmissions.

Further, a 16th invention is the digital broadcast receiver according to the 12th invention, further comprising:
As a digital broadcast receiver capable of realizing the pay broadcast charging system according to any one of 3 to 15, the CP
U is provided with at least a means for counting and recording the number of transmitted confirmation commands, and / or a means for determining the setting state of the non-viewing display and the viewing display set by the user operation means. It is a feature of the present invention as a digital broadcast receiver.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a pay broadcast charging system according to the present invention and a digital broadcast receiver for realizing the pay broadcast charging system will be described with reference to the drawings.
In the embodiments described below, for simplification, the case of satellite digital broadcasting will be described as an example.
The present invention is not limited to such a case. For example, even if other media such as terrestrial digital broadcasting is used, only the circuit block of the receiving antenna and the converter unit is changed. The circuit blocks (that is, the circuit blocks other than the above-mentioned circuit blocks) provided for realizing the pay broadcast billing system can have the same circuit configuration and can obtain the same effect. You can

Further, even in the case of a reproduction signal from the storage device in which the transport stream TS is separately recorded, the transport stream TS is bypassed to the tuner section shown in the present embodiment and is sent to the descramble section. By inputting, exactly the same effect can be obtained.

FIG. 1 is a circuit block diagram showing the configuration of a typical satellite digital broadcast receiver that realizes the present invention.
Although the circuit configuration and the like may be slightly different depending on the model, the basic processing content is the same for all models. The function of the digital broadcast receiver 10 for receiving satellite digital broadcast will be briefly described with reference to FIG.

The satellite broadcast radio wave received by the antenna 1 is down-converted to a required frequency band, and then the digital broadcast receiver 1 is passed through the antenna input terminal 10a.
Input to 0. The tuner unit 2 tunes to the frequency instructed by the CPU 6 in response to the user's channel selection operation, performs digital demodulation such as 8PSK, transmission descrambling, deinterleaving, error correction, etc. Selection of a transmission slot corresponding to a digital broadcasting service by user selection is performed based on an instruction from the CPU 6. In the descrambling unit 3, the input signal encrypted for conditional access in pay broadcasting or the like is decrypted using the encryption / decryption key. The decryption key information for decrypting such an encrypted input signal is
The limited information for limited reception such as ECM data and EMM data is discriminated and acquired from the IC card 7 having the limited reception discriminating unit 7a for generating the encryption / decryption key for encryption / decryption. The acquired encryption / decryption key information is given to the descrambling unit 3 by the CPU 6.

A data separating unit 4 following the descrambling unit 3 separates the digital broadcasting service (video, audio, data, etc.) selected by the user from the transport stream TS defined by the MPEG standard.
Separated digital broadcasting services (that is, elementary stream ES: Elementary Stream)
m) is the MPEG decoding unit 5 for the video / audio information.
To the video output terminal 10c and the audio output terminal 10d. On the other hand, regarding the data service, the data processing is performed from the data output terminal 10e, and the data processing required in each digital broadcasting service is performed.

Further, regarding the reproduction signal from the storage device in which the transport stream TS is separately recorded, the external signal input terminal 1 provided in the digital broadcast receiver 10 is also provided.
By directly inputting from 0b to the descrambling unit 3, it is possible to perform the processing after the descrambling unit 3 in exactly the same way as in the case of receiving from satellite digital broadcasting.

Next, the viewing fee charging process in the conventional PPV system will be described with reference to FIG. here,
FIG. 2 is a flowchart showing a conventional operation relating to a pay broadcast viewing time in the digital broadcast receiver having substantially the same circuit configuration as the digital broadcast receiver 10 shown in FIG. Broadcasters that supply PPV programs have
Digital broadcast receiver 1 of a user who is registered as a user
EMM (Ent) for writing contract information with the broadcaster to the IC card 7 installed in
elementManagementMessag
e) Send the data. The EMM data is stored in a predetermined memory area of the non-volatile memory in the IC card 7, whereby the contract information with the broadcasting company is recorded and saved.

When the contract information with the broadcaster who broadcasts the PPV program is registered in the IC card 7, the flowchart of FIG. 2 is started. When the user selects the PPV program from the contracted broadcaster (step S1), the digital broadcast receiver 1
The CPU 6, which is a control unit that controls the overall control of 0, determines whether the received transport stream TS is a pay broadcast (step S2). If it is determined that the broadcast is not a pay broadcast (NO in step S2), the operation illustrated in FIG. 2 ends, while if it is determined that the broadcast is a pay broadcast (YES in step S2), the CPU 6 of the digital broadcast receiver 10 , Filtering processing for extracting ECM data multiplexed in the input transport stream TS is performed (step S
3).

The extracted ECM data is supplied from the CPU 6 to the IC card 7 in order to obtain the encryption / decryption key information for the encryption / decryption of the input signal, that is, the input transport stream TS (step S4). As a response to the ECM data from the IC card 7, when the purchase contract of the PPV program is already completed,
Data indicating that the PPV program can be purchased is stored in the CPU.
It is sent back to step 6 (step S5). Furthermore, the PP
IC with data showing that V programs can be purchased
From the card 7, the response data regarding the viewing fee of the PPV program and the presence / absence of recording limitation are also stored in the CPU.
It has been sent back to 6.

Next, the CPU of the digital broadcast receiver 10
6, it is determined whether the program is a viewable program based on the response data (step S).
6). When it is determined that the program can be viewed (YES in step S6), an encryption / decryption key for decrypting the encryption is obtained based on the response from the IC card 7 and the ECM data, and the digital decryption key is obtained. It is set in the descrambling unit 3 of the broadcast receiver 10 (step S11), and the pay broadcast program transmitted in the subsequent transport stream TS is decrypted with respect to encryption.

On the other hand, when it is determined that the program is not a viewable program (NO in step S6), whether the program can be purchased as a PPV program is determined by the CPU 6 based on the response data from the IC card 7. Is determined (step S7). If it is determined that the PPV program can be purchased (YES in step S7), the C
In order to prompt the purchase of the PPV program by the program processing, the PU 6 can purchase information of the PPV program on the TV screen, and information regarding the viewing fee and the recording availability at the time of purchase (that is, PPV purchase). The screen) is displayed as an OSD display (step S8).

On the other hand, when it is determined that the PPV program cannot be purchased (NO in step S7), the C
By the program processing, the PU 6 causes the purchase prohibition screen indicating that the purchase of the PPV program is impossible to be OSD-displayed on the television screen (step S12), and ends the operation shown in FIG.

In step S8, the PPV purchase screen is displayed as O.
When SD is displayed, the user has the OSD of the PPV purchase screen.
If you want to watch the PPV program according to the display,
A PPV program purchase operation is performed by remote control operation or the like (YES in step S9). If the PPV program purchase operation is not performed (NO in step S9) and the non-purchase operation that does not want to purchase the PPV program is performed (YES in step S13),
Although the operation shown in FIG. 2 is ended, if the non-purchase operation is not performed (NO in step S13), the process returns to step S9,
Wait for user operation.

When the CPU 6 of the digital broadcast receiver 10 receives the user's PPV purchase operation in step S9 (YES in step S9), it sends a purchase command indicating that the PPV program is purchased to the IC card 7. (Step S10). When the IC card 7 receives the purchase command indicating that the PPV program is purchased, the ECM data that is periodically transmitted thereafter is
Each time, the CPU 6 of the digital broadcast receiver 10 immediately responds with the encryption / decryption key information for the encryption / decryption.

In the CPU 6 of the digital broadcast receiver 10, the received decryption key information from the IC card 7 is
The descrambling unit 3 connected to the latter stage of the tuner unit 2 is set (step S11). Then, the subsequent encrypted input signal, that is, the input transport stream TS signal is converted into a decrypted transport stream TS signal in the descrambling unit 3, and is output after the descrambling unit 3. The PPV program is supplied to the data separation unit 4 and the MPEG decoding unit 5 in the state where the user can watch the PPV program.

The ECM data is regularly transmitted in the transport stream TS signal, and the encryption / decryption key for encryption / decryption is changed each time. Then, each time the ECM data is received, the process shown in FIG. 2 is repeated at any time, whereby the changed encryption / decryption key is newly set in the descrambling unit 3, and the user is interrupted. It is possible to watch the PPV program.

When the IC card 7 receives the purchase command indicating the purchase of the PPV program in step S10 of FIG. 2, the received purchase command is used as viewing history information inside the IC card 7. Of the non-volatile memory of the PPV program viewing history recording memory area 7b is sequentially recorded, and the viewing history information indicating the history of PPV program purchase is regularly (for example, once a month).
(About once) or when the PPV program viewing history recording memory area 7b in the IC card 7 becomes full, etc.
Uploaded via a telephone line to a host station operated by a broadcasting company broadcasting V programs. The broadcaster broadcasting the PPV program calculates a viewing fee based on the uploaded viewing history information and bills the user for the viewing fee for the PPV program.

As described above, the conventional charging process for PPV programs is based on the viewing history information of PPV programs recorded in the IC card 7, that is, the purchase record for each PPV program. Therefore, the unit of charge for the PPV program is one program unit. Thus, for example, when the user purchases a PPV program for a long time, the viewing fee for one program is charged even if the viewing is stopped during the broadcast of the program. In addition, depending on the program, the user may
Although it is possible to imagine a case in which only a part of the V program is desired to be viewed, even in such a case, the viewing fee for one program is charged. For the user, such viewing fee billing is very disadvantageous.

The pay-broadcast billing system according to the present invention realizes the billing system for improving the above-mentioned disadvantage of the user, and the details of the pay-broadcast billing system according to the present invention will be described below. To do. Here, as an example of the circuit configuration of the digital broadcast receiver for realizing the pay broadcast charging system according to the present invention, the configuration of the digital broadcast receiver 10 shown in FIG.

(Invention of Claims 1 to 4) First, a digital broadcast receiver 10 (that is, a digital broadcast receiver 10 that realizes a pay broadcast charging system according to claims 1 to 3 of the present invention).
In the digital broadcast receiver according to claim 4, I
In addition to the PPV program viewing history information (that is, PPV program purchase command history information) recorded in the predetermined memory area in the non-volatile memory area in the C card 7, that is, the PPV program viewing history recording memory area 7b, While watching a purchased PPV program, an ECM (Entitlement Controller) is periodically transmitted to the IC card 7.
ol Message) The number of data, IC card 7
In the above, a process for counting the number of ECM receptions and adding the number of ECM receptions of the purchased PPC program to each purchased PPV program in the PPV program viewing history recording memory area 7b is added.

That is, in the inventions according to claims 1 to 4, the ECM is provided in the IC card 7 and
The digital broadcast receiver 10 is provided in the conditional access discriminating unit 7a which is the conditional access discriminating means for discriminating the conditional information for conditional access such as data or EMM data and generating the encryption / decryption key for the encryption / decryption. A process of counting up the number of ECM data transmitted from the CPU 6 to the IC card 7 as the number of ECM receptions and writing in a predetermined memory area in the nonvolatile memory area in the IC card 7, that is, a PPV program viewing history recording memory area 7b. An ECM reception number counting section 7a ₁ (that is, ECM reception number counting and recording means) is provided.

Thus, as the counting and recording processing of the number of ECM receptions newly required for realizing the pay broadcast charging system according to the present invention, the IC card 7 side installed in the digital broadcast receiver 10 side If the IC card 7 is exchanged, the control unit in the conventional digital broadcast receiver 10, that is, the processing of the CPU 6 does not involve any additional processing and is based on the actual viewing time. Thus, it is possible to easily realize a billing method for calculating the viewing fee of the PPV program.

FIG. 3 shows the EC for each PPV program purchased.
It is a memory block diagram which shows an example of a structure of the PPV program viewing history recording memory area 7b which has recorded and stored the number of M receptions.
As shown in FIG. 3, the number of ECM receptions received while viewing the purchased PPV program is also recorded for each purchased PPV program recorded in the PPV program viewing history recording memory area 7b.

The viewing history information indicating the history of PPV program purchases is regularly (for example, about once a month) or the IC card 7 together with the number of ECM receptions for each purchased PPV program. When the PPV program viewing history recording memory area 7b therein is full, the PPV program is uploaded to a host station operated by a broadcaster broadcasting a PPV program through a telephone line. The broadcaster broadcasting the PPV program calculates the viewing time based on the uploaded viewing history information and the number of ECM receptions for each purchased PPV program, and further, the viewing fee based on the viewing time. Is calculated and the user is billed for the program viewing fee. That is, the viewing fee can be set as a viewing fee according to the viewing time of each PPV program by calculating in consideration of the number of ECM receptions that are regularly received.

On the other hand, the ECM data multiplexed on the broadcast transport stream TS signal is regularly transmitted at a short cycle of several seconds.
The encryption / decryption key information for decrypting the encryption of the transport stream TS is updated in such a short cycle. That is, tampering is prevented by updating the encryption / decryption key information every short cycle. The pay-broadcast charging system according to the present invention determines the number of ECM data that can be regularly received in such a short period.
It is possible to calculate the viewing time by using the clock for the broadcast time instead of the clock, and it is not necessary to provide a new clock generating means in the IC card 7.

For example, the purchase P that has been selected and viewed
In the case where the update cycle of the encryption / decryption key of the PV program (that is, the ECM data reception cycle) is a one-second cycle, if it is a one-hour program, 3600 while watching the purchased PPV program. Once, the ECM data is sent to the IC card 7, and the encryption / decryption key update processing and the like are performed. Then, the ECM recorded in the PPV program viewing history recording memory area 7b of the IC card 7 as the number of ECM data of the purchased PPV program transmitted in the one second cycle.
If the number of receptions is 1800, for example, the user is watching the purchased PPV program for 30 minutes instead of 1 hour.

Therefore, when the viewing charge is calculated based on the viewing history information uploaded to the host station operated by the broadcaster broadcasting the PPV program and the number of ECM receptions for each purchased PPV program. , The viewing fee for one purchased PPV program (that is, one hour) is, for example,
If it is 1,000 yen, the viewing charge equivalent to 500 yen, which is half the price, can be obtained for 30 minutes calculated from the number of ECM receptions that are considered to be actually viewed.

The process of counting the number of ECM receptions recorded in the PPV program viewing history recording memory area 7b, that is, the process of the ECM reception number counting unit 7a ₁ of the limited reception determination unit 7a in the IC card 7 is the purchase PPV program. Is not counted only when continuously watching, and it is also possible to stop watching while watching. In the time period when the viewing is stopped, it is possible to skip the count processing of the ECM reception number during the time when the viewing is stopped and restart the counting of the ECM reception number when the viewing is restarted. Further, even when only a part of the program is viewed, by skipping the count of the number of ECM receptions from the beginning of the program to the part where the user actually wants to view, only the number of ECM receptions during the time when the program is actually viewed is displayed. It is also possible to count.

Whenever the IC card 7 receives ECM data, if the number of ECM receptions in the PPV program viewing history recording memory area 7b composed of a non-volatile memory is directly counted up, it takes a lot of time for writing, which is realistic. is not. Therefore, the EC in the RAM area in the IC card 7
An MCM received number count-up area is provided, and the ECM counted up in the ECM received number countup area
The number of receptions is stored in the non-volatile memory at regular intervals (every constant time or every certain number of times), when the IC card 7 is deactivated, or when the PPV program ends, that is, when the user next selects a channel. It is desirable to transfer to the PPV program viewing history recording memory area 7b.

The flow of processing in the IC card 7 when receiving ECM data as described above will be described with reference to the flowchart shown in FIG. Here, in FIG.
7 is a flowchart showing an example of a processing flow in a limited reception determination unit 7a in the IC card 7 when receiving CM data.

First, the conditional access discrimination section 7a of the IC card 7
When receiving the ECM data (step S21), confirms whether a purchase contract for the PPV program has been made (step S22). FIG. 1 shows that the PPV program purchase contract has been made (YES in step S23), and that the viewing status indicating that the PPV program can be viewed by the user operation is set. If it is determined by the non-viewing / viewing-indication determining unit 7a ₂ (YES in step S24), the ECM reception number counting unit 7a ₁ causes the IC card to record the number of received ECM data. The ECM reception number count-up area provided in advance in the RAM area 7 is counted up as the ECM reception number (step S25). On the other hand, when the PPV program purchase contract is not made (NO in step S23), or when the non-viewing display indicating that the viewing is stopped is set by the user operation, the non-viewing / viewing If it is determined by the middle display determination unit 7a ₂ (NO in step S24), the count-up of the ECM reception number is skipped, and further, the encryption / decryption key generation operation for decrypting the encryption is also skipped. It will be.

In step S24, the non-viewing / watching display determination unit 7a ₂ is used to determine the setting state of the display during viewing or the display during non-viewing, that is, whether the user is watching or has stopped viewing. However, by performing this determination processing, as described above, the PPV
Not only when watching programs continuously,
After interrupting the viewing of the program once, restarting the viewing,
Alternatively, even when only a part of the program is viewed, it is possible to count and record the number of ECM receptions only during the viewing time during which the program is actually viewed, and thus the actual viewing is performed. It is possible to calculate the viewing fee according to time.

As the viewing stopping means for stopping the viewing, the power of the digital broadcast receiver 10 itself is turned off, the IC card 7 is removed from the digital broadcast receiver 10, or another channel is selected. For example, if you want to resume viewing after a few minutes even after the interruption of viewing, it is possible to stop viewing by such means and then resume viewing. There are many waste points in terms of user operation and processing in the digital broadcast receiver 10.

Thus, the CP in the digital broadcast receiver 10
It is desirable that a part of the processing executed by the U6 or the IC card 7 should be provided with a viewing stopping means that can easily determine whether or not the user has watched. The viewing stop means (that is, the means for determining the setting state of the non-viewing display of the non-viewing / watching display determination unit 7a ₂ ) is the ECM extracted by filtering from the transport stream TS. A user operation means for prohibiting only the process of transferring data from the CPU 6 to the IC card 7 may be provided, but in FIG. 4, the non-viewing display or the viewing display set by the user operation means is displayed. The setting state can be discriminated by the processing of the conditional access discriminating unit 7a in the IC card 7 (that is, the non-viewing display or the viewing display can be set by the user operation means. In addition, the non-viewing / viewing display is read by the non-viewing / viewing display discriminating unit 7a ₂ provided in the conditional access discriminating unit 7a in the IC card 7. Then, it is possible to determine whether the display state during non-viewing display or the display state during viewing is determined).

As the user operation means for instructing the user to stop viewing, for example, a method of selecting and operating by remote control by displaying as a menu item in OSD display, a method of providing a dedicated button on the remote control, or a digital A method of providing a dedicated switch on the main body of the broadcast receiver 10 may be considered.

As described above, as a part of the processing executed by the CPU 6 or the IC card 7 in the digital broadcast receiver 10, the user operation means capable of determining whether or not the user has watched (that is, realized as a part of the internal processing). The advantage of using the non-viewing / viewing-in-progress display determining unit 7a ₂ ) is that normal viewing is performed even if the channel selection processing operation in the digital broadcast receiver 10 is stopped. Since it is possible to make the state completely the same as the state, it is possible to immediately present the digital broadcast program when the viewing is resumed.

On the other hand, when the power of the digital broadcast receiver 10 is turned off or another channel is selected without using the user operation means, the power is turned from the off state to the on state. , Or when re-tuning the program from another channel, a re-tuning operation for digital broadcasting is required. For re-tuning operation in digital broadcasting, the digital data necessary for the program to be selected is Acquisition is necessary, and it will take extra time to resume broadcasting compared to normal analog broadcasting channel selection.

Further, even when the IC card 7 is removed from the digital broadcast receiver 10, when the IC card 7 is reinserted, the initial activation process of the IC card 7 is required, and the initial activation process is required. The conversion process also takes time, which causes an extra time before the resumption of broadcasting.

Here, the user operation means is used to once set a state in which the viewing of the program is stopped, and then the viewing restarting means for restarting the viewing of the program again (that is, non-viewing / watching). The display discriminating unit 7a ₂ also serves as a unit for discriminating the setting state of the viewing-in-viewing display, that is, the viewing-stopping unit (that is, the non-viewing-in-display setting state in the non-viewing / viewing-in-display determining unit 7a ₂ It is desirable that the user operating means is the same as the user operating means of (the means for determining). That is, for example, by displaying as a menu item in the OSD display, a selection operation is performed by remote control operation, a method of providing a dedicated button on the remote control, or a method of providing a dedicated switch on the main body of the digital broadcast receiver 10 C in the digital broadcast receiver 10 by using the same means corresponding to the viewing stopping means.
Means capable of determining resumption of viewing as a part of the processing executed by the PU 6 or the IC card 7 (that is, means for determining the setting state of the in-viewing display in the non-viewing / viewing-in-display determining unit 7a ₂ ) Will be prepared.

Next, returning to the flowchart of FIG. 4, every time a predetermined time has elapsed from the start time of the purchased PPV program, the ECM that has been counted up in the ECM reception number count-up area is periodically updated. The ECM reception number counting unit 7a ₁ determines the reception number in a predetermined memory area provided in the nonvolatile memory, that is, a predetermined PPV program viewing history recording memory area 7b (shown in FIG. 3) corresponding to the purchased PPV program. A process of writing and recording in a place is executed (step S27). Note that in the flowchart of FIG. 4 showing the operation at the time of receiving ECM data, when the ECM reception number is written in the PPV program viewing history recording memory area 7b at the same time as the ECM data reception time and at a constant time interval. However, as described above, the present invention is not limited to such a case.

That is, it may be written periodically each time the number of ECM receptions reaches a predetermined number of times, or may be written in a time zone independent of the ECM data reception time. For example, the IC card 7
May be written when the PPV program is deactivated, or when the PPV program ends, that is, when the user performs the next channel selection operation, but in either case, as a matter of course, when the PPV program broadcast ends, The number of ECM receptions that have been counted up by the end of broadcasting is the PPV shown in FIG.
It is written in the program viewing history recording memory area 7b.

Here, as shown in FIG. 3, it is possible to record the contract information necessary for the charge calculation together. For example, depending on the broadcasting company, it is possible to set the contract content including various fee services such as discounting the viewing fee when all the one program is viewed, and the viewing fee in proportion to the viewing time is completely available. It need not be limited to being set. In the case where there is a matter that is affected by the viewing situation of the PPV program, such as the time zone in which the program is actually viewed, as the contract conditions related to the calculation of the viewing fee, the PPV of FIG.
It may be recorded in the program viewing history recording memory area 7b.

Then, in the flow chart of FIG.
Processing such as generation of an encryption / decryption key, which is the original processing when receiving ECM data, is performed (step S28). Further, the confirmation results in steps S23 and S24 are output as an OSD display (step S29).

(Invention of Claims 5 to 8) A digital broadcast receiver 10 (that is, a digital broadcast receiver of claim 8) which realizes the pay broadcast charging system of claims 5 to 7. Digital broadcasting receiver 1
0 from the CPU 6 to the conditional access discriminating unit 7a in the IC card 7
The number of ECM data transmissions transmitted to the ECM data transmission device is provided as an ECM transmission number counting unit 6a (that is, ECM transmission number counting and recording means) that can be counted and recorded by the CPU 6 as the ECM transmission number. It is a thing.

Here, the digital broadcast receiver 10 for realizing the pay broadcast charging system according to any one of claims 1 to 3 (that is, the digital broadcast receiver according to claim 4).
In the conventional digital broadcast receiver 10
The digital broadcast receiver 1 without additional processing in 6.
The number of ECM data received from the CPU 6 only in the IC card 7 mounted in 0 is counted and recorded as the number of ECM receptions. However, in the case of the invention described in claims 1 to 4, since the CPU 6 in the digital broadcast receiver 10 itself does not retain any recording of the viewing fee charged for viewing the purchased PPV program, the user is The viewing fee of the purchased PPV program charged by the broadcaster remains unknown.

Therefore, in the digital broadcast receiver 10 (that is, the digital broadcast receiver according to claim 8) that realizes the pay broadcast charging system according to any one of claims 5 to 7, the digital broadcast reception is performed. The CPU 6 in the machine 10 also determines the number of ECM data to be transmitted to the conditional access determination unit 7a of the IC card 7 while watching the purchased PPV program by using EC
EC with the function of counting and recording as M transmissions
The M transmission number counting unit 6a is added. In the digital broadcast receiver 10, the viewing time for the purchased PPV program is calculated based on the ECM transmission number counted and recorded by the ECM transmission number counting unit 6a, and further, the viewing time is determined according to the viewing time. The viewing fee is calculated, and the calculated viewing time and / or viewing fee is calculated using the OSD.
By a user operation capable of menu selection such as display, it is possible to display the OSD on the TV screen and present it to the user.

In such a case, the ECM transmission number counting unit 6a has a predetermined memory in a non-volatile memory area provided in the digital broadcast receiver 10 in order to surely record and store the transmission number of ECM data. It is necessary to write the ECM transmission number in the area, that is, the ECM transmission number recording memory area 6b.

As in the case of writing the ECM reception number in the PPV program viewing history recording memory area 7b formed of the nonvolatile memory in the IC card 7, the ECM transmission number recording memory area 6b is transmitted to the ECM transmission number recording memory area 6b. It is not a good idea to write each time you count up. CPU6
An ECM transmission number count-up area is provided in a RAM area inside the ECM transmission number count-up area, and the ECM transmission number counted up in the ECM transmission number count-up area is set at constant time intervals or at some timing (for example, when power-off is detected or I
When removing the C card 7)
It may be transferred to the M transmission number recording memory area 6b.

As in the case of the invention according to any one of claims 1 to 4, the CP is based on the user operation means operated by the user when the viewing is stopped / restarted.
The non-viewing / watching display discrimination unit 6c provided in U6 (that is, the non-viewing / viewing display setting state determining means set by the user operation means) is operated to operate the ECM.
By skipping the counting process of the ECM transmission number of the transmission number counting unit 6a or restarting the counting process, the number of ECM transmissions according to the viewing time actually being viewed is counted, and the CPU 6 E
Since it is recorded in the CM transmission number recording memory area 6b, the ECM transmission number can be set to a value that matches the ECM reception number recorded in the PPV program viewing history recording memory area 7b of the IC card 7.

(Invention of Claims 9 to 12) In the invention of any one of Claims 1 to 8, the viewing fee of the purchased PPV program is the PPV program in the IC card 7. Although it was determined by the number of ECM receptions recorded in the viewing history recording memory area 7b,
In the digital broadcast receiver 10 (that is, the digital broadcast receiver according to claim 12) that realizes the pay broadcast charging system according to claims 9 to 11, the number of ECM receptions is counted and shown in FIG. Instead of recording in the PPV program viewing history recording memory area 7b, the digital broadcast receiver 1
The confirmation command reception number counting unit 7 provided in the limited reception determination unit 7a of the IC card 7 determines the number of confirmation commands periodically transmitted from the CPU 6 of 0 to the IC card 7.
a ₁ ′ (that is, counting and recording means for confirmation command reception number), the confirmation command reception number is counted, and the PPV program viewing history recording memory area 7 shown in FIG.
By recording in b ', the viewing time is calculated, and thus the viewing fee of the PPV program based on the actual viewing time is calculated.

FIG. 5 is a memory block diagram in which the number of confirmation command receptions is recorded instead of the number of ECM receptions in the case of FIG. 3 described above.
PP that records and stores the number of confirmation commands received for each V program
It is a memory block diagram which shows an example of a structure of V program viewing history recording memory area 7b '. As shown in FIG. 5, the PPV
For each purchased PPV program recorded in the program viewing history recording memory area 7b ', the number of confirmation command receptions received during viewing of the purchased PPV program is also recorded.

Here, in the digital broadcast receiver 10, not only during viewing of pay broadcast, but periodically,
A confirmation command is issued from the CPU 6 of the digital broadcast receiver 10 to the IC card 7. The confirmation command is sent from the conditional access discrimination unit 7a of the IC card 7 to the CPU 6
To respond to various request signals to the IC card 7,
This is for confirming acceptance of the instruction request from the limited reception determination section 7a, and notifies the limited reception determination section 7a of the IC card 7 as a flag format in the response data. The contents confirmed by the confirmation command include, for example, PPV program viewing history information recorded in the PPV program viewing history recording memory area 7b '(that is, PPV program purchase command history information).
In order to receive a calling date acquisition request for uploading to a host station operated by a broadcaster, or to receive individual information, that is, contract information regarding a conditional access contract,
It transmits various information related to conditional access for pay broadcasting, such as an energization control information acquisition request for instructing reception of EMM data.

In order to periodically send such a confirmation command to the conditional access determination section 7a of the IC card 7, the CPU 6 of the digital broadcast receiver 10 uses a timer counting process, for example, every 15 seconds. The confirmation command is periodically issued to the conditional access determination unit 7a of the IC card 7, and each flag displayed in the response from the IC card 7 is checked to respond to the instruction from the IC card 7. Each process is being executed.

On the other hand, in the IC card 7, after the PPV program is purchased, the purchased PPV program is being viewed (that is, EC
While receiving M data), the number of confirmation commands transmitted from the CPU 7 of the digital broadcast receiver 10 is calculated by the confirmation command reception number counting unit provided in the limited reception determining unit 7a in the IC card 7. 7a ₁ ′ is counted as the number of confirmation commands received, and is recorded in association with the PPV program viewing history information recorded in the PPV program viewing history recording memory area 7 b ′ shown in FIG. 5, for example. Similar to the number of received ECMs in the case of any one of items 1 to 4, the viewing time of the purchased PPV program is calculated based on the number of received confirmation commands, and the viewing fee is determined according to the viewing time. Can be realized.

Note that, in the IC card 7, as in the case of the recording operation of the number of ECM receptions in the case of the inventions of claims 1 to 4, each time the IC card 7 receives the confirmation command, it is read from the nonvolatile memory. If the number of confirmation command receptions in the PPV program viewing history recording memory area 7b 'is directly counted up, it takes a writing time, which is not realistic. Therefore, the RAM in the IC card 7
A confirmation command reception number count-up area is provided in the area,
The number of confirmation command receptions counted up in the confirmation command reception number count-up area is periodically (every predetermined time or every predetermined number of times), when the IC card 7 is deactivated, or when the PPV program ends. At the time of the next channel selection operation by the user, the PP in the non-volatile memory
It is transferred to the V program viewing history recording memory area 7b '.

Further, the viewing history information indicating the history of the purchase of the PPV program recorded in the PPV program viewing history recording memory area 7b 'is periodically (for example, together with the number of confirmation commands received for each purchased PPV program). (About once a month), or when the PPV program viewing history recording memory area 7b 'in the IC card 7 becomes full, etc.
To the host station operated by the broadcasting company broadcasting the program,
Upload via phone line. The broadcaster broadcasting the PPV program calculates the viewing time based on the uploaded viewing history information and the number of confirmation commands received for each purchased PPV program, and further, based on the viewing time, The viewing fee is calculated and the user is billed for the program viewing fee. That is, the viewing fee can be set as a viewing fee according to the viewing time of each PPV program by being calculated in consideration of the number of confirmation commands received regularly.

Further, as in the case of the invention according to any one of claims 1 to 4, the IC is based on the user operation means operated by the user when the viewing is stopped / restarted.
The non-viewing / viewing display determination unit 7a ₂ (that is, the setting state of the non-viewing / viewing display set by the user operation unit) provided in the conditional access determination unit 7a in the card 7 is used. By performing the operation to skip the process of counting the number of confirmation command receptions or restart the counting, the number of confirmation command receptions corresponding to the actually viewed viewing time is counted, and FIG.
Since it is recorded in the PPV program viewing history recording memory area 7b 'in the IC card 7 shown in FIG. 5, it is possible to calculate the viewing fee corresponding to the viewing time actually viewed.

The flow of processing in the IC card 7 when the confirmation command is received as described above will be described with reference to the flowchart shown in FIG. FIG. 6 is a flowchart showing an example of the flow of processing in the limited reception determination unit 7a in the IC card 7 when the confirmation command is received.

First, the conditional access discrimination section 7a of the IC card 7
When the confirmation command is received (step S31), P
The viewing state of whether or not the PV program is being viewed is confirmed (step S32). This is a case where a PPV program is being viewed (YES in step S33), and the fact that the viewing status indicating that the PPV program can be viewed by the user operation is set is a non-viewing / viewing status. If it is determined by the display determination unit 7a ₂ (step S3)
4 YES), in order to record the number of received confirmation commands, the confirmation command reception number counting unit 7a ₁ ′, in the confirmation command reception number count-up area provided in advance in the RAM area of the IC card 7, Count up as the number of confirmation commands received (step S
35). On the other hand, when the PPV program is not currently being viewed (NO in step S33), or when a non-viewing display indicating that the viewing is to be stopped is set by a user operation. In-viewing display determination unit 7a ₂
If it is determined in step (N in step S34)
O), the count-up of the number of ECM receptions is skipped.

In step S34, the in-viewing / unviewing display determination unit 7a ₂ is used to determine the setting state of the in-viewing display or the non-viewing display, that is, whether the user is watching or is not viewing. However, by performing such identification processing, as described above, the PPV
Not only when watching programs continuously,
After interrupting the viewing of the program once, restarting the viewing,
Alternatively, even when only a part of the program is viewed, it is possible to count and record the number of confirmation command receptions only during the viewing time during which the program is actually viewed. It is possible to calculate the viewing fee according to the viewing time.

Every time a predetermined period of time elapses from the start time of the purchased PPV program, the confirmation command reception number counted up in the confirmation command reception number count-up area is periodically changed to the confirmation command reception number. The count unit 7a ₁ ′ writes and records in a predetermined memory area provided in the nonvolatile memory as shown in FIG. 5, that is, in a predetermined location corresponding to the purchased PPV program in the PPV program viewing history recording memory area 7b ′. The process is executed (step S37).

Note that in the flowchart of FIG. 6 showing the operation at the time of receiving the confirmation command, the number of confirmation commands received is shown as the PPV program shown in FIG. Although the case of writing in the viewing history recording memory area 7b 'is shown, as described above, the present invention is not limited to this case. That is, the number of confirmation command receptions counted up in the confirmation command count-up area is periodically (every constant time or every certain number of times) or in the IC in a time zone independent of the confirmation command reception time. The card 7 may be transferred to the PPV program viewing history recording memory area 7b 'in the non-volatile memory when the card 7 is deactivated or when the PPV program ends, that is, when the user performs the next tuning operation. Further, as a matter of course, at the end of broadcasting of the PPV program, the number of confirmation command receptions counted up by the end of broadcasting is written in the PPV program viewing history recording memory area 7b 'shown in FIG. .

Here, as shown in FIG. 5, it is possible to record the contract information necessary for the viewing charge calculation together. For example, depending on the broadcasting company, it is possible to set the contract content including various fee services such as discounting the viewing fee when all the one program is viewed, and the viewing fee in proportion to the viewing time is completely available. It need not be limited to being set. If the contract condition related to the calculation of the viewing fee is an item that is affected by the viewing status of the PPV program, such as the time zone in which the program is actually viewed, at the same time, viewing the PPV program in FIG. It may be recorded in the history recording memory area 7b '.

Finally, the confirmation results in steps S33 and S34 are output as an OSD display (step S
38).

(Invention of Claims 13 to 16) A digital broadcast receiver 10 (that is, claim 1) which realizes the pay broadcast charging system according to claims 13 to 15.
In the digital broadcast receiver described in 6, the CPU 6 of the digital broadcast receiver 10 sends the number of confirmation commands transmitted from the CPU 6 to the limited reception determination unit 7a in the IC card 7 as the confirmation command transmission number. Confirmation command transmission number counting unit 6 capable of counting and recording
a '(namely, a means for counting and recording the number of confirmation command transmissions) is provided.

Here, in the invention according to any one of claims 9 to 12, the number of confirmation commands received from the CPU 6 only in the IC card 7 mounted in the digital broadcast receiver 10 is used as a confirmation command. It is counted and recorded as the number of receptions and does not require additional processing in the CPU 6 in the conventional digital broadcast receiver 10 as in the invention according to any one of claims 1 to 4 described above. there were. However, such claim 9
In the case of the invention described in any one of claims 1 to 12, similarly to the invention described in any one of claims 1 to 4, the CPU 6 itself in the digital broadcast receiver 10 is charged for viewing the purchased PPV program. Since no recording of the viewing fee is left, the user remains in a state where the viewing fee of the purchased PPV program charged by the broadcaster is unknown.

Thus, the digital broadcast receiver 10 realizing the pay broadcast charging system according to any one of claims 13 to 15 (that is, the digital broadcast receiver according to claim 16).
, The CPU 6 in the digital broadcast receiver 10
Also in the above, the confirmation command transmission number counting unit 6a ′ having a function of counting and recording the number of confirmation command transmissions transmitted to the conditional access determination unit 7a of the IC card 7 while watching the purchased PPV program. Is to be added. In the digital broadcast receiver 10, the viewing time regarding the purchased PPV program is calculated based on the number of confirmation command transmissions counted and recorded by the confirmation command transmission number counting unit 6a ′, and further, the viewing time is calculated. A viewing fee according to the above is calculated, and the calculated viewing time and / or viewing fee is displayed on the TV screen by a user operation capable of menu selection such as OSD display.
It is possible to display the SD and present it to the user.

In such a case, the confirmation command transmission number counting unit 6a 'stores a nonvolatile memory area provided in the digital broadcast receiver 10 in order to reliably record and store the number of ECM data transmissions. It is necessary to write the confirmation command transmission number in a predetermined memory area, that is, the confirmation command transmission number recording memory area 6b '. As in the case of writing the confirmation command reception number in the PPV program viewing history recording memory area 7b 'composed of a nonvolatile memory in the IC card 7, the confirmation command transmission number recording memory area 6b' is confirmed. It is not a good idea to write each time the number of transmissions is counted up. CPU6
A confirmation command transmission number count-up area is provided in the internal RAM area, and the number of confirmation command transmissions counted up in the confirmation command transmission number count-up area is set at regular intervals or at some timing (for example,
Number of confirmation command transmissions in the non-volatile memory when the power is turned off or when the IC card 7 is removed
It may be transferred to b '.

Further, as in the case of the invention according to any one of claims 9 to 12, the CP is based on the user operation means operated by the user when the viewing is stopped / restarted.
Non-viewing / watching display determination unit 6c provided in U6
(That is, the means for determining the setting state of the non-viewing / watching display set by the user operation means) is operated to skip the counting processing of the confirmation command transmission number of the confirmation command transmission number counting unit 6a '. Or, or
By restarting the counting process, the number of confirmation command transmissions corresponding to the actually watched viewing time is counted and recorded in the confirmation command transmission number recording memory area 6b ′ in the CPU 6, and the confirmation is performed. The command transmission number can be set to a numerical value that matches the confirmation command reception number recorded in the PPC program viewing history recording memory area 7b 'of the IC card 7.

[0098]

As described above, according to the pay broadcast billing system and the digital broadcast receiver for realizing the pay broadcast billing system according to the present invention, each circuit unit and internal processing in the conventional digital broadcast receiver are It is possible to charge a viewing fee according to the viewing time actually watched by the user when viewing a pay broadcast in digital broadcasting, in particular, viewing a PPV system program, without any change.

Further, even while the pay broadcast program is being viewed, it is possible to stop the viewing or restart the stopped viewing by a simple user operation. It is possible to re-present a program within a much shorter time than the viewing restart method. Further, it is possible to realize only a part of the pay broadcast program by a simple user operation similar to the case of stopping / restarting the viewing. In any of these cases, it is possible to charge a viewing fee according to the actual viewing time.

[0100] Furthermore, in case the user wants to confirm the viewing charge of a pay broadcast program purchased in advance before the viewing charge from the broadcasting company comes in, the viewing time and / or the viewing charge of the pay broadcast is paid. Can be displayed on the screen of the digital broadcast receiver of the user.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing a configuration of a typical satellite digital broadcast receiver that realizes the present invention.

FIG. 2 is a flowchart showing a conventional operation for viewing a pay broadcast in a digital broadcast receiver having substantially the same circuit configuration as the digital broadcast receiver shown in FIG.

FIG. 3 is a memory configuration diagram showing an example of a configuration of a PPV program viewing history recording memory area in which an ECM reception number is recorded and stored for each purchased PPV program.

FIG. 4 is a flowchart showing an example of a processing flow in a limited reception determination unit in the IC card when receiving ECM data.

FIG. 5 is a memory configuration diagram showing an example of a configuration of a PPV program viewing history recording memory area in which the number of confirmation command receptions is recorded and stored for each purchased PPV program.

FIG. 6 is a flowchart showing an example of a processing flow in a limited reception determination unit in the IC card when a confirmation command is received.

[Explanation of symbols]

1 ... Antenna, 2 ... Tuner section, 3 ... Descramble section, 4 ... Data separation section, 5 ... MPEG decoding section, 6 ... CP
U, 6a ... ECM transmission number counting section, 6a '... Confirmation command transmission number counting section, 6b ... ECM transmission number recording memory area, 6b' ... Confirmation command transmission number recording memory area, 6
c ... Non-viewing / viewing-in-progress display determination unit, 7 ... IC card, 7
a ... conditional discrimination unit, 7a ₁ ... ECM reception counting unit, 7a ₁ '... confirmation command reception counting unit, 7a ₂ ...
Non-viewing / during-viewing display discrimination unit, 7b, 7b '... PPV program viewing history recording memory area, 10 ... Digital broadcast receiver, 10a ... Antenna input terminal, 10b ... External signal input terminal, 10c ... Video output terminal, 10d … Audio output terminal,
10e ... Data output terminal.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04H 1/00 H04N 7/08 Z H04N 7/08 G06K 19/00 Q 7/081 N 7/20 630 F Term (reference) 5B035 BB09 BC00 CA29 5B058 CA01 CA23 YA20 5C063 AA20 AB03 AC01 AC05 AC10 CA40 DA07 DA13 5C064 BA01 BB01 BB10 BC03 BC07 BC22 BC24 BD04 BD08 BD09 DA14

Claims (16)

[Claims] 1. An IC card having conditional access discriminating means for discriminating conditional information for conditional access and generating an encryption / decryption key for encryption / decryption, and an input signal encrypted for conditional access. Is provided with at least a descramble means for decrypting with the encryption / decryption key and a CPU for controlling the entire digital broadcast receiver, and the digital broadcast receiver is capable of receiving and viewing pay broadcasts. ECM (EntitlementC) for obtaining the encryption / decryption key included in the input signal in a pay broadcast billing system for determining the viewing charge of the pay broadcast.
ontrol Message) data is regularly
Each time the CPU transmits to the limited reception determination means in the IC card, the limited reception determination means counts the number of received ECM data as the number of received ECMs, and a predetermined memory area in the IC card. The pay-broadcast charging system is characterized in that the viewing time can be calculated according to the number of received ECMs and the viewing fee can be determined by recording in the. 2. The pay-broadcast charging system according to claim 1, wherein a non-viewing indication is displayed by the user operating means that can be operated by the user, indicating that the viewing of the pay-broadcast program is stopped during or from the beginning. By setting and setting the set state of the non-viewing display set by the limited reception determining means in the IC card, the counting of the ECM reception number is stopped, and
A paid-broadcast billing system characterized by stopping the viewing of paid broadcasts. 3. The pay broadcast billing system according to claim 2, wherein the non-viewing display is restored by a user operating means that can be operated by a user, and the viewing-indicating display indicating that viewing is possible is set. By making the limited reception discriminating means in the IC card discriminate the setting state of the display during watching, which has been set, the counting of the ECM reception number, which has been suspended, is restarted and stopped. In addition, a pay broadcast billing system characterized by restarting viewing of the pay broadcast. 4. A digital broadcast receiver capable of implementing the pay-broadcast charging system according to any one of claims 1 to 3, wherein the limited information for limited reception is discriminated and the encryption for decryption is performed. An IC card having conditional access discrimination means for generating a decryption key, a descrambler for decrypting an input signal encrypted for conditional access with the encryption / decryption key, and control of the entire digital broadcast receiver. And a CPU for controlling the number of ECMs, and the limiting reception discriminating means for counting and recording the ECM reception number, and / or
Alternatively, the digital broadcast receiver is provided with at least a determination unit for determining the setting state of the non-viewing display and the viewing display set by the user operation unit. 5. The pay broadcast charging system according to claim 1, wherein each time the ECM data is transmitted from the CPU to the limited reception determining means in the IC card, the CPU transmits the ECM data. EC number
By counting the number of M transmissions and recording them in a predetermined memory area in the CPU, the viewing time and / or viewing fee of the pay broadcast can be displayed on the screen of the digital broadcast receiver. Broadcast billing system. 6. The pay broadcast charging system according to claim 2 or 5, wherein the setting state of the non-viewing display is the CP.
A pay-broadcast charging system characterized in that the counting of the number of ECM transmissions is stopped by discriminating by U. 7. The pay broadcast charging system according to claim 3 or 6, wherein the setting state of the during-viewing display is set to the CPU.
The EC that was discontinued by making a distinction by
A pay-broadcast charging method characterized by restarting the counting of the number of M transmissions. 8. The digital broadcast receiver according to claim 4, further comprising a CPU as a digital broadcast receiver capable of realizing the pay broadcast charging system according to any one of claims 5 to 7. Digital broadcast reception characterized by at least a means for counting and recording the number of ECM transmissions and / or a means for determining the setting state of the non-viewing display and the viewing display set by the user operation means. Machine. 9. An IC card having conditional access discriminating means for discriminating conditional information for conditional access and generating an encryption / decryption key for encryption / decryption, and an input signal encrypted for conditional access. Is provided with at least a descramble means for decrypting with the encryption / decryption key and a CPU for controlling the entire digital broadcast receiver, and the digital broadcast receiver is capable of receiving and viewing pay broadcasts. In the pay broadcasting billing system for determining the viewing charge of the pay broadcasting, the request signal to the CPU from the conditional access determining means in the IC card is dealt with.
Each time a confirmation command periodically transmitted from the CPU is transmitted to the limited reception determination means in the IC card, the limited reception determination means determines the number of confirmation commands received by the confirmation command reception number. The pay-broadcasting charging system is characterized in that the viewing time can be calculated and the viewing fee can be determined according to the number of confirmation commands received by counting the number of the confirmation commands and recording it in a predetermined memory area in the IC card. 10. The pay-broadcast charging system according to claim 9, wherein a non-viewing indication indicating that the viewing is to be stopped from the middle or the beginning of the pay-broadcast program by the user operation means that can be operated by the user. By setting and setting the set state of the non-viewing display set by the limited reception determining means in the IC card, the counting of the number of confirmation commands received is stopped and the pay broadcast is viewed. A pay-broadcast billing system characterized by being canceled. 11. The pay-broadcast charging system according to claim 10, wherein the non-viewing display is restored by a user operation means that can be operated by the user, and the viewing-indicating display indicating that the viewing is possible is set. By making the limited reception discriminating means in the IC card discriminate the setting state of the display during viewing, which has been set, the counting of the number of confirmation command receptions which has been suspended is restarted and stopped. The paid broadcast billing system is characterized by restarting viewing of the paid broadcast. 12. A digital broadcast receiver capable of implementing the pay broadcast billing system according to claim 9, wherein the limited information for limited reception is discriminated and the encryption for decryption is performed. An IC card having conditional access discrimination means for generating a decryption key, a descrambler for decrypting an input signal encrypted for conditional access with the encryption / decryption key, and control of the entire digital broadcast receiver. And a CPU for controlling the reception of the confirmation command, and further, the limited reception determination means counts and records the number of confirmation command receptions, and / or the non-viewing display and the viewing-in-progress display set by the user operation means. A digital broadcast receiver characterized by comprising at least means for determining the setting state of. 13. The pay broadcast charging system according to claim 9, wherein each time the confirmation command is transmitted from the CPU to the conditional access determination means in the IC card,
In the CPU, the number of transmissions of the confirmation command is counted as the number of confirmation command transmissions and recorded in a predetermined memory area in the CPU, so that the viewing time and / or viewing of the pay broadcast is displayed on the screen of the digital broadcast receiver. A pay-broadcast billing system characterized by being able to display charges. 14. The pay broadcast charging system according to claim 10, wherein the CPU determines the setting state of the non-viewing display to stop counting of the number of confirmation command transmissions. Pay broadcasting billing method. 15. The pay-broadcast charging system according to claim 11, wherein the CPU determines the setting state of the viewing-and-listening display to restart counting of the confirmation command transmission number which has been stopped. Pay broadcasting billing method characterized by 16. The digital broadcast receiver according to claim 12, further comprising a CPU as a digital broadcast receiver capable of realizing the pay broadcast charging system according to any one of claims 13 to 15. A digital broadcast characterized by at least a means for counting and recording the number of transmitted confirmation commands, and / or a means for determining the setting state of the non-viewing display and the viewing display set by the user operation means. Receiving machine.