JPH06334616A - Broadcast reception system - Google Patents

Abstract

PURPOSE:To receive at the receiving station of a mobile object in a simple system by receiving only a normal broadcast signal when persistent cipher decoding information from an outside is not supplied. CONSTITUTION:A broadcasting station selected by the operation key input of a display control operating part 6 is received by a tuner part TU at the preceding state of decoders 1 and 2, and a detected digital signal is extracted as a viewing program signal by the decoder 1. When the signal is not scrambled 1, it is allowed the pass through a cipher decoder 3 as it is, converted into an analog signal by a signal processing circuit 4, and outputted from an outputting circuit 5. When the signal is scrambled pay broadcast, and the continuous cipher information is supplied from a cipher information supplier 11, the private receiver is confirmed by a receiver ID code 10 in the receiver. Then, the signal is decoded by a decoder 3, and outputted through the circuit 4 from the output 5. When the continuous cipher information is not supplied from the supplier 11, only the normal broadcast signal is received, so that the mobile object is easily received at the mobile object receiving station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, and more particularly to a broadcast receiving system which is installed in a vehicle or the like and moves over a wide range. The present invention relates to a multi-channel pay broadcast receiving system suitable for use in a mobile receiving station.

[0002]

2. Description of the Related Art A conventional multi-channel pay broadcasting system for music, video programs, etc. is provided with a fixed descrambler (decryption machine) as shown in Japanese Patent Publication No. 4-6634, and a pay broadcasting contract is made in advance. Decoding codes are supplied to the decryption machine on a regular basis by broadcasting, telephone line, etc.
It was a pay broadcasting system with a contract for each fixed station that allowed viewing for a certain viewing period.

[0003]

However, in mobile pay broadcasting, etc., the broadcast receiver is not fixed, and since it moves over a wide area, pay stations differ depending on the area, and contracts with multiple broadcast stations are made. If not, there is an inconvenience that the code cannot be viewed without the decoding code.

Further, when receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed when moving, the encrypted broadcast wave is received even when the normal broadcast signal is selected, It causes inconvenience that an unpleasant sound is output or strange images are displayed.

In addition, even when paying a certain amount of time according to a certain viewing time in advance to enable viewing of a plurality of pay broadcasts, it is unclear which pay broadcast is being watched, and it is fair to pay broadcasters. There is a problem that it is not possible to allocate various usage fees.

[0006] In the prepaid (prepaid) type viewing, there is also a problem that the output of the pay broadcast program being viewed is suddenly stopped when the viewing time corresponding to the prepaid amount expires.

The present invention has been made in view of the above points,
The purpose of the broadcast is to make it possible to realize regional pay broadcasting reception by mobile receiving stations that move in a wide range with a simple system, and to enable fair distribution of usage charges to pay broadcasting companies. To provide a receiving system.

[0008]

In order to achieve the above object, the present invention receives a pay broadcast in a broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and an ordinary broadcast signal are mixed. In order to perform the encryption, a decryption device provided inside the receiver and an encryption information supply device (for example, an IC card) for supplying continuous decryption information to the receiver from the outside in order to perform the decryption are provided. The decryption device operates by continuously supplying decryption information from an external encryption information supply device.

Further, the cryptographic information supply device for externally supplying the decryption information to the receiver from the outside, the data (indicating the time when the pay broadcasting signal corresponding to the paid (advance payment) amount of money can be received ( (Viewable time data) is stored, and when a pay broadcast signal is watched by connecting the encryption information supplier to the receiver, at least the pay broadcast station code and the actual viewing time data received from the receiver side are used as the encryption information. It is configured to prohibit the supply of the encrypted information from the encrypted information supply device when the total of the actual viewing time exceeds the viewable time according to the paid amount, which is input and recorded in the supply device. .

Further, this encryption information supply device can be reused by the writing device provided separately, when the user pays the amount of money according to the scheduled viewing time again. At the time of rewriting, the writing device reads the pay broadcasting station code received / viewed and the viewing time corresponding to it, which are stored in the cryptographic information supply device, and reads the usage record as a usage record for each period. Store the received pay broadcasting station code and viewing time in a storage device so that the paid amount can be distributed among pay broadcasting companies according to the received pay broadcasting station code and viewing time within that period. To

In addition to the above, when watching a pay broadcast in which the available viewing time is expired according to the paid amount, for example, only that program can be viewed even after the available viewing time expires, and the writing machine Allow reimbursement (payment of recharge) for payment of excess charge.

[0012]

Since the cryptographic information supply device including an IC card or the like can easily incorporate a relatively large-capacity semiconductor memory, it is possible to store the decryption information for the pay broadcasting of each region and to add it to the pay broadcasting. It becomes possible to supply the decryption code corresponding to the code and the like, and it is possible to receive the pay broadcast of any area.

Further, since the pay broadcasting station record such as the pay broadcasting station code and the actual viewing time is written from the receiver side into the cipher information supplying device such as an IC card, it is necessary to re-use the cipher information supplying device. When paying the usage fee, the viewing record of each user can be read, and by distributing the payment fee to the pay broadcaster based on this information for a certain period, the usage fee can be distributed almost according to the usage record. .

Further, even when watching a pay broadcast in which the viewable time according to the amount paid has expired, it is possible to select the post-payment payment method at the time of rewriting (payment of recharge) by the writing machine, so that there is a charge. It is possible to avoid sudden interruption of viewing of broadcasting.

It is easy to detect the state where the cryptographic information supplier is not connected to the receiver, and when this disconnection is detected, the presence / absence of encryption added to the broadcast wave is detected. Based on this, if you can select only non-encrypted normal broadcast, you will receive an encrypted broadcast wave and output an unpleasant sound when selecting a channel when the encryption information supply device is not connected. , It is possible to avoid the inconvenience that strange images are displayed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the configuration of a receiver according to the present embodiment for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed. In the figure, 1 is a decoder for extracting a viewing program signal from a digital broadcasting signal received and digitized by the tuner unit TU in the preceding stage, and 2 is program information, broadcasting station code, pay broadcasting from the digital broadcasting signal. The decoder 3 for taking out the additional code such as the encrypted code and the presence or absence of the encrypted code corrects the scrambled viewing program signal into a digital signal which the output signal can be taken out by the signal processing circuit 4 in the subsequent stage. Decryptor 4, a signal processing circuit for converting the modified viewing program signal into an analog signal, 5 an output circuit for the analog signal, 6 has a display for notifying program information and remaining viewing time, and an operation key input section The display control operation unit, 7 is a control circuit for transmitting the operation content of the operation key input unit to the tuner unit TU and controlling broadcast reception,
Reference numeral 8 is a timer for counting the reception time of pay broadcasting or free broadcasting (normal broadcasting), and 9 is a receiver and a cryptographic information supply device 1.
An interface with 1, reference numeral 10 is a receiver ID code that enables the use of dedicated pay broadcasting, and 11 is a cryptographic information supply device such as an IC card or a magnetic card.

FIG. 2 is a block diagram showing a cryptographic information supplier 11 such as the IC card or magnetic card described above, and a card writing terminal 30 to which the cryptographic information supplier 11 is connected as necessary. In this example, the cryptographic information supply device 11 includes a card interface unit 12, a card control unit 13, and a card storage device 14, but the card (the cryptographic information supply device 11) stores the card. In the case of being configured only with the device 14, the interface unit 12 and the functional unit of the card control unit 13 are arranged in the card writing terminal 30 and in the receiver of FIG. Further, in the card writing terminal 30, 15 is an interface unit of the card writing terminal, and 16
Is a storage device of the card writing terminal, 17 is a control unit of the card writing terminal, 18 is a charge storage unit of the card writing terminal, 19 is a display unit of the card writing terminal, and 20 is centralized control of data collection of the card writing terminal. It is a communication modem.

FIG. 3 shows an example of a scrambled digital broadcast data format. In FIG. 3, 21 is a sync signal section, 22 is a data control signal section, and 23 is a data control signal section.
Is scrambled data. The data format of this scrambled digital broadcast is, for example, as shown in FIG.
As shown in, the data control signal unit 22 for transmitting the broadcasting station code, the program information, the code for decrypting the scrambled pay broadcast, the data indicating the presence or absence of the code, etc., following the synchronization signal unit 21. And, following this, scrambled data, which is a digital viewing program signal that is scrambled when paying. Then, the synchronization signal 21 in which these signals 22 and 23 are inserted at regular intervals
Will be sent continuously.

Next, the operation of this embodiment will be described. In FIG. 1, the broadcasting station selected by the operation key input of the display control operation unit 6 is received by the tuner unit TU before the decoders 1 and 2, and the detected digital signal is taken out by the decoder 1 as a viewing program signal. . This viewing program signal is scrambled in the case of pay broadcasting and is not scrambled in the case of free broadcasting (normal broadcasting). In the case of free scrambled broadcasting, the viewing program signal passes through the decryption machine 3 as it is, is converted into an analog signal by the signal processing circuit 4, and is output from the output circuit 5.

Here, in this embodiment, the receiver is
The receiver automatically detects and identifies whether or not the cryptographic information supply device 11 is connected. Further, if the presence / absence of encryption is added to the broadcast wave, it is possible to easily identify whether or not the broadcast wave is an encrypted (scrambled) pay broadcast on the receiver side. Therefore, in this embodiment, when it is detected that the cryptographic information supply device 11 is not connected, the receiver is not scrambled based on the encryption presence / absence information added to the broadcast wave. It is designed to automatically select a mode in which only normal broadcast (not encrypted) can be selected, or to take this mode by user's operation. Therefore, in this reception operation mode, when a channel is selected when the cryptographic information supplier 11 is not connected, a scrambled (encrypted) broadcast wave is received, an unpleasant sound is output, and a strange image is output. It is possible to avoid the inconvenience that "is displayed".

In the case of scrambled pay broadcasting, if a collective individual contract for each broadcasting station has been completed, or if there is persistent cryptographic information from the cryptographic information supplier 11. , The receiver ID code 10 in the receiver confirms that the receiver is a dedicated receiver, and the scrambled viewing program signal output from the decoder 1 is decrypted by the decryptor 3 and then by the signal processing circuit 4. Output circuit 5 after converting to analog signal
Output from.

Here, the encryption information supply device 11 mainly
The receiver is installed in a car, etc. and is provided for traveling in a wide range of different pay broadcasting areas, and each scrambled pay broadcasting of a large number of pay broadcasting stations within a wide range can be received (decoding As is possible), decryption information for almost all possible pay broadcasts within a wide range is stored. In addition, when a collective individual contract for each broadcasting station is made on a monthly basis, although not shown, a cryptographic information supplier different from the cryptographic information supplier 11 (second cryptographic information supplier) Is prepared and connected to the receiver. This second cryptographic information supplier is provided mainly for receiving a contracted pay broadcast which covers only a predetermined area (for example, an area where a user lives), and receives the contracted pay broadcast. When selected, the second decryption information supplier supplies the decryption information to the decryption device 3. Also, the second cryptographic information supplier for the collective individual contract usually has a box type structure, and
The update information (valid period update information and, in some cases, update decryption information) is written in the encryption information supplier by a broadcast or telephone line, and is updated to an available state. It should be noted that the second cryptographic information supply device can be configured by an IC card or the like like the cryptographic information supply device 11. If the second cryptographic information supply device is configured by an IC card or the like, a card described later will be used. It is also possible that the writing terminal 30 performs the update process.

On the other hand, in the case of scrambled pay broadcasting, if the collective individual contract as described above has not been made, or if there is no persistent cryptographic information from the cryptographic information supply device 11, the timer 8 is used. You can receive the broadcast only for a short period of time to determine the broadcast content, make you interested in the pay broadcast, encourage the connection of the cryptographic information supply device 11, or receive the station from the beginning. The tuner circuit TU is controlled by the control circuit 7 so that it does not exist. In addition, when the collective individual contract has not been made, or when there is no continuous cryptographic information from the cryptographic information supply device 11, when the pay broadcast can be received for a short time, the decryption is performed inside the receiver. A storage unit that stores deciphering information for is prepared in advance.

Here, the encryption information supply device 11 is shown in FIG.
As shown in (4), it is connected to the card writing terminal 30 in advance (before watching the scrambled pay broadcast), and in this state, depending on the amount of money put into the fee storing unit 18 on the card writing terminal 30 side. , The card storage device 14 on the cryptographic information supplier 11 side from the card writing terminal 30 side to the card storage device 14 indicating the allowable reception range according to the prepaid amount such as the receivable time, the amount of money, the frequency, etc. Memorize the time).

Then, by connecting the cryptographic information supply device 11 in which the data indicating the remaining amount of time paid in advance (reception allowable range) is stored to the receiver as shown in FIG. The machine is configured to be ready to receive pay broadcasts. Here, in the present embodiment, when the cryptographic information supply device 11 is connected to the receiver, when the reception of the pay broadcast is selected, or when the prepaid remaining time becomes zero or the remaining time becomes short, Time The remaining time of the cryptographic information supplier 11 is displayed on the display unit in the display control operation unit 6.

When the cryptographic information supplier 11 having the remaining time is connected to the receiver and the operation of receiving the pay broadcast is selected,
From the data control signal extracted from the decoder 2, the presence / absence of a cipher, the broadcasting station code, the cipher data for scrambling and the like are read out, and as long as the cipher information supplier 11 has the remaining time for pay broadcasting reception, the cipher The continuous supply of the decryption information for operating the decryption device 3 is maintained. As a result, the receiver of this embodiment can receive pay broadcasting.

During the reception of the scrambled pay broadcast described above, the timer 3 inside the receiver operates to input the elapsed time data to the cryptographic information supply device (IC card etc.) 11. As a result, on the side of the cryptographic information supply device 11,
The remaining time (receivable time) stored inside (card storage device 14) is subtracted based on the input elapsed time data. At the same time, the pay broadcasting station code, the broadcast reception real-time data corresponding to the code, the broadcast reception time (reception start / end time), etc. are also stored in the cryptographic information supplier 11. The reason for doing so is that the usage record of each broadcasting station can be known later, and it is possible to distribute the usage fee to broadcasters based on the usage record, and to create data for creating audience ratings. Is to get

Further, in this embodiment, even if the remaining time of the cryptographic information supply device (IC card or the like) 11 is exhausted, by indicating the intention of post-payment of charges to the system, within a certain fixed time limit. It has become possible to receive pay broadcasts in. That is, when the remaining time of the cryptographic information supply device 11 becomes less than a certain time, the receiver causes the display unit of the display control operation unit 6 to display the remaining time and an alarm signal, and the output circuit 5 By issuing an alarm voice signal from the etc., the user is made aware that the remaining time for which the pay broadcast in the cryptographic information supplier 11 can be received is running short. As a result, the user who knows that the remaining time of the cryptographic information supply device 11 has decreased and wants to continue to receive the pay broadcast even after the remaining time of the cryptographic information supply device 11 is exhausted. in case of,
This is instructed to the receiver by a key input in the display control operation unit 6. As a result, the receiver becomes
Even after the remaining time of the device runs out, the mode is set so that the pay broadcast can be received within a certain fixed time limit, and the encrypted information supplying device 11 is operated during the above certain fixed time limit. Is configured to continue to supply the decryption information to the decryption machine 3.

At this time (after the remaining time of the cryptographic information supply device 11 is exhausted), the elapsed time data input from the receiver is input to the cryptographic information supply device 11 (reception record time data of pay broadcasting). Is added and stored as post-payment charge time data. At the same time, the pay station code,
Data such as broadcast reception time (reception start / end time) is also stored in the cryptographic information supply device 11.

Here, the encrypted information supply device (IC card or the like) 11 for which the remaining time when the pay broadcast is receivable is zero or the remaining time is short is, for example, a gas station,
When connected to the card writing terminal 30 installed at an appropriate place such as a roadside service area or a convenience store, the remaining time (including zero) of the encrypted information supplying device 11 and the postpaid charge time data described above are encrypted. If the information is stored in the information supply device 11, the postpaid fee, etc.
It is displayed on the display unit 19 of the card writing terminal 30. In this state, when the user puts money into the charge storage unit 18 of the card writing terminal 30, the payment process for the postpaid charge and the setting of the remaining time for which a new pay broadcast can be received are set according to the payment amount. You can do it.

At this time, the received real-time data for each pay broadcasting station stored in the cryptographic information supplier 11 is read by the card writing terminal 30 and written in the storage device 16 of the card writing terminal 30. And
The reception time data for each pay broadcasting station stored in the card writing terminal 30 is transferred from the card writing terminal 30 to the management station or the like via the communication modem 20 at an appropriate timing. As a result, in the management station or the like, the charge storage unit 18 of each card writing terminal 30 is collected in accordance with the reception time of each pay broadcasting station by collecting data for each card writing terminal 30 within a certain period. The usage fees for the paid broadcasts that have been put in are distributed and calculated for each pay broadcasting company according to the usage record.

Furthermore, in the present embodiment, as described above, a collective contract is made on a monthly basis for each broadcasting station where the user is performing pay broadcasting (or all pay broadcasting stations in the specified area). When a collective contract is signed, it is also possible to receive the scrambled specific pay broadcast by connecting the second encryption information supply device (not shown) for the contracted specified pay broadcast to the receiver. There is. Decryption data for deciphering only a particular contracted pay broadcast and data indicating the valid contract period are written in the second cryptographic information supply device, and during the valid contract period, the second device connected to the receiver is written. It is configured so that the decryption information supply device 2 can supply the decryption information to the decryption device 3 of the receiver. In the present embodiment, even when a pay broadcast is received using the second encrypted information supply device for receiving the collective contract broadcast, the pay broadcast station code and the broadcast reception received from the receiver as usage record data. Data such as time (reception start / end time) is sent to and stored in the cryptographic information supply device 11 including an IC card or the like.

It should be noted that, with the cryptographic information supply device 11 including an IC card and the second cryptographic information supply device for receiving the collective contract broadcast both connected to the receiver, the specific pay broadcast for which the collective contract has been completed is received. In this case, the supply of the decryption information from the encryption information supply device 11 is stopped by the command from the receiver,
During this period, the reception time data of the pay broadcast described above from the receiver is not sent to the cryptographic information supplier 11 (the subtraction processing of the receivable remaining time in the cryptographic information supplier 11 is not performed). It is like this.

Here, in this embodiment, as described above, when a scrambled pay broadcast is received,
Corresponding broadcasting station code, broadcasting reception time (reception start / end time), etc. are stored in the cryptographic information supply device (IC card etc.) 11, which is read by the card writing terminal 30,
In the management station and the like, the broadcasting station code and the broadcasting reception time can be aggregated and arithmetically processed, so that there is an advantage that the data of the audience rating of each pay broadcasting can be easily obtained.

In addition to the usage record of the scrambled pay broadcast, the usage record of the normal (free) broadcast without scramble may also be required for the audience rating survey and the like. In such a case, when receiving the normal (free) broadcast, the broadcast station code of the received normal broadcast and the broadcast reception time (reception start / end time) are stored in an appropriate memory means inside the receiver. The data stored in the memory means is transferred to and stored in the cryptographic information supply device (IC card or the like) 11 at an appropriate timing when the cryptographic information supply device (IC card or the like) 11 is connected to the receiver. To be done. In addition, the second for the above-mentioned collective contract pay broadcasting
It is also assumed that the usage history of pay broadcasting is required in a state where only the cryptographic information supplier of (1) is connected to the receiver and the cryptographic information supplier (IC card or the like) 11 is not connected to the receiver. In such a case, similarly, when a pay broadcast using the second cryptographic information supplier is received, the broadcast station code and the broadcast reception time (reception start / end time) of the received pay broadcast are
The data stored in the memory means is stored in an appropriate memory means inside the receiver, and the data stored in the memory means is transferred to the receiver at an appropriate timing when the encryption information supply device (IC card or the like) 11 is connected. Etc.) 11 for transfer and storage. Therefore, with such a configuration, when the card writing terminal 30 reads the data in the cryptographic information supplier 11, the pay / normal broadcast station code and the broadcast reception time received are read, so that
It becomes possible to use it as data for the audience rating survey of all broadcasting stations regardless of the usual way.

[0036]

As described above, according to the present invention, when receiving a pay broadcast by region in a moving body such as a car, the pay broadcast at the destination can be received even if each pay broadcast is not individually contracted. It becomes possible, and to the pay broadcasting companies, the usage fee of the pay broadcasting can be evenly distributed to the pay broadcasting companies according to the usage record. Furthermore, according to the broadcast reception result data stored in the cryptographic information supplier such as an IC card,
It is also possible to easily aggregate audience ratings of each broadcasting station.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a receiver according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a cryptographic information supply device shown in FIG. 1 and a card writing terminal to which the cryptographic information supply device is connected as necessary.

FIG. 3 is an explanatory diagram showing an example of a data format of digital broadcasting according to an embodiment of the present invention.

[Explanation of symbols]

 1 Decoder for taking out viewing signal 2 Decoder for taking out additional information 3 Decryption machine 4 Signal processing circuit 5 Output circuit 6 Display control operation unit 7 Control circuit 8 Timer 9 Interface 10 Receiver ID code 11 Cryptographic information supplier 12 Card Interface unit 13 Card control unit 14 Card storage device 15 Card writing terminal interface unit 16 Card writing terminal storage device 17 Card writing terminal control unit 18 Charge storage unit 19 Card writing terminal display unit 20 Communication modem 21 Sync signal unit 22 Data control signal section 23 Scrambled data 30 Card writing terminal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunari Tanaka 2520 Takaba, Katsuta-shi, Ibaraki Hitachi Ltd. Automotive Equipment Division (72) Inventor Keiro Shinkawa 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Shares Inside Hitachi, Ltd. (72) Inventor Tadao Takashima 2499-1 Hironodai, Zama City, Kanagawa Prefecture Xanavie Informatics Co., Ltd.

Claims (12)

[Claims] 1. A broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, and a decryption machine provided inside the receiver for receiving the pay broadcast. A cryptographic information supplier for externally supplying persistent decryption information to the receiver to perform decryption, wherein the decryptor is an external persistent decryption information from the cryptographic information supplier. The receiver is capable of receiving only the non-encrypted normal broadcast signal at the time of the channel reception operation when the receiver is configured to operate by the supply of the data and the continuous supply of the decryption information is not supplied from the outside. A broadcast receiving system characterized by the following. 2. A broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, and a decryption machine provided inside the receiver for receiving the pay broadcast. A cryptographic information supplier for externally supplying persistent decryption information to the receiver to perform decryption, wherein the decryptor is an external persistent decryption information from the cryptographic information supplier. In addition, the pay broadcast signal and the normal broadcast signal are added with the presence / absence information of the pay broadcast encryption, so that the decryption can be continuously performed from the external cryptographic information supplier. If no information is supplied, the receiver is allowed to receive only the unencrypted normal broadcast signal according to the encryption presence / absence information in the broadcast signal at the time of the channel reception operation. Broadcast receiving system and butterflies. 3. A broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, and a decryption machine provided inside the receiver for receiving the pay broadcast. A cryptographic information supplier for externally supplying persistent decryption information to the receiver to perform decryption, wherein the decryptor is an external persistent decryption information from the cryptographic information supplier. In addition, the pay broadcast signal and the normal broadcast signal are added with the presence / absence information of the pay broadcast encryption, so that the decryption can be continuously performed from the external cryptographic information supplier. If no information is supplied, the receiver can receive the encrypted pay broadcast signal for a certain period of time set by a timer according to the encryption presence / absence information in the broadcast signal at the time of channel reception operation. Broadcast receiving system, characterized in that a. 4. A broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, wherein a decryption machine provided inside the receiver for receiving the pay broadcast. A cryptographic information supplier for externally supplying persistent decryption information to the receiver to perform decryption, wherein the decryptor is an external persistent decryption information from the cryptographic information supplier. It is configured to operate by the supply of the
Data indicating the time at which the pay broadcast signal corresponding to the paid-in amount can be received is stored, and when the pay information signal is received by connecting the cryptographic information supplier to the receiver, the receiver side If at least the pay broadcasting station code and the actual reception time data received from are input to the cryptographic information supply device and can be recorded, and the total of the actual reception time exceeds the receivable time according to the paid amount, The broadcast receiving system is characterized in that the supply of the decryption information from the encryption information supplier is prohibited. 5. The encryption information supply device according to claim 4, wherein the cryptographic information supply device is reusable by re-paying an amount of money according to a receivable time by a separately provided writing device, and the writing device is rewritten. Sometimes, the received pay broadcasting station code and the actual reception time as the pay broadcasting usage record stored in the cryptographic information supplying device are read out, and the received pay broadcasting station code and the actual reception time as these usage results are read in a certain period unit. And are stored in the storage device,
A broadcast receiving system characterized in that the paid amount can be distributed among pay broadcasters according to the pay broadcasting station code received during the period and the actual reception time. 6. The encryption information supply device according to claim 5, wherein a pay broadcasting station code and actual reception time data corresponding to the pay broadcasting station code are stored in the cipher information supply device, and the paying device code is stored in the writing device. When the encryption information supply device is connected, the writing device reads out the pay broadcasting station code and the actual reception time data corresponding to it, and uses it as data for calculating the usage record such as the audience rating for each pay broadcasting program. A broadcast receiving system characterized by being provided. 7. The cipher information supply device according to claim 6, wherein a normal broadcasting station code as usage record data of the normal broadcasting signal other than the pay broadcasting signal and actual reception time data corresponding thereto When the encryption information supply device is connected to the writing device, the writing device reads a normal broadcasting station code and the actual reception time data corresponding to the normal broadcasting station code, and the normal ( A broadcast receiving system characterized by being provided as data for calculating usage results such as audience ratings for each (free) broadcast program. 8. The encryption information supply device according to claim 4, wherein the encryption information supply device can be reused by re-paying an amount corresponding to a receivable time by a separately provided writing device, and the writing device is re-written. At some time, it has a function of reading the received pay broadcasting station code and the actual reception time as the pay broadcasting usage record stored in the cryptographic information supplier, and the cryptographic information supplier is connected to the receiver. At this time, if the receivable time of the cryptographic information supply device according to the paid amount is about to exceed the total of the actual reception time of the pay broadcast signal, the receiver will give a voice or display in advance. A broadcast receiving system characterized by informing the user that the remaining time available for reception has decreased. 9. A broadcast receiving system for receiving a broadcast signal in which an encrypted pay broadcast signal and an ordinary broadcast signal are mixed, wherein a decryption device provided inside the receiver for receiving the pay broadcast. A cryptographic information supplier for externally supplying persistent decryption information to the receiver to perform decryption, wherein the decryptor is an external persistent decryption information from the cryptographic information supplier. It is configured to operate by the supply of the
Data indicating the time at which the pay broadcast signal corresponding to the paid-in amount can be received is stored, and when the pay information signal is received by connecting the cryptographic information supplier to the receiver, the receiver side If at least the pay broadcasting station code and the actual reception time data received from are input to the cryptographic information supply device and can be recorded, and the total of the actual reception time exceeds the receivable time according to the paid amount, Makes it possible to selectively prohibit the cryptographic information supply from the cryptographic information supply machine, and the cryptographic information supply machine can be reused by re-paying an amount corresponding to the receivable time by a separately provided writing machine. It is enabled, and the writing machine stores the received pay broadcasting station code and the actual reception time as the pay broadcasting usage record stored in the encryption information supplying machine at the time of rewriting. In addition, when the cryptographic information supplier is connected to the receiver, the receivable time according to the paid amount of the cryptographic information supplier is the actual reception time of the pay broadcast signal. If the total of the above is about to be exceeded, the receiver does not notify the user in advance that the remaining time that can be received is reduced by voice or display, whereby the user has already paid When instructing to continuously receive the pay broadcast signal even after the receivable time corresponding to the amount of money has expired, or automatically, only for a certain period of time after the receivable time has expired, While continuing the supply of the decryption information from the encryption information supply device to the receiver, the pay broadcasting station code and the actual reception time data received after the receivable time has expired are supplied to the encryption information supply device. The broadcast receiving system, wherein the excess time can be settled when the rewriting fee is paid by the rewriting machine. 10. A receiver for receiving a broadcast signal in which an encrypted pay broadcast signal and a normal broadcast signal are mixed, and a decryption device provided inside the receiver for receiving the pay broadcast. And a cryptographic information supplier that externally supplies persistent cryptographic decryption information to the receiver in order to perform decryption. A broadcast receiving system configured to operate by supply, wherein the time during which the pay broadcast signal can be received by the prepaid system according to claim 1 is limited according to a paid amount. The broadcast receiving system, wherein the encrypted information supplying device and the second encrypted information supplying device, in which the period during which the pay broadcast signal can be received is limited by a predetermined contract period, can be used. 11. The charge for the second cryptographic information supply device according to claim 10, wherein the first cryptographic information supply device and the second cryptographic information supply device are both connected to the receiver. A broadcast receiving system, characterized in that, when a pay broadcast signal for which a broadcast contract has been made is received, data for charge calculation is not supplied to the first encrypted information supplier during this period. 12. The broadcast receiving system according to claim 1, wherein the cryptographic information supplier has an identification code that can be used only by a dedicated pay broadcast receiver.