JPH10341425A - Data receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform parental control to data to be transmitted. SOLUTION: In the storage device 23 of a data reception terminal equipment 1, storage control information corresponding to a contract with a digital broadcast station side is stored beforehand. The digital broadcast station side superimposes the storage control information corresponding to the contract to program data and transmits them. A control information extraction circuit 11 extracts the storage control information superimposed to the program data and a comparison and judgement circuit 12 compares the storage control information stored in the storage device 23 with the extracted storage control information and record-controls the program data to a recording medium 17 along with the extracted storage control information only in the case that both match. At the time of reproduction, the storage control information stored in the recording medium 17 is reproduced and the comparison and judgement circuit 12 reads the storage control information stored in the storage device 23 and compares both. Then, in the case that both match, the program data stored in the recording medium 17 are reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to terrestrial broadcasting,
Satellite broadcasting, cable television system (CATV)
The present invention relates to a data receiving apparatus suitable for use in a pay broadcasting system or the like performed in the above.

[0002]

2. Description of the Related Art At present, pay broadcasting in which a viewing contract is made for each channel or program and a viewing fee is paid to view the program is provided in satellite broadcasting and CATV. For this purpose, the broadcast station scrambles the paid program data using a specific key regardless of analog broadcasting or digital broadcasting, and the receiving side descrambles the contracted channel or program. In general, a system for obtaining a key of the program and descrambling and viewing the program using the key is generally used. For this purpose, a database for subscriber management is required on the broadcast station side, and a receiving terminal device capable of viewing programs in accordance with contract conditions is required on the receiving side.

[0003] In order to deliver the key for descrambling, it is difficult to use the key illegally by anyone other than the contractor. Therefore, encryption is performed using unique identification information assigned to each receiving terminal device to which the contract is made. It is delivered in such a way that it can only be decrypted by the receiving terminal device.

[0004] Now, it is not unusual to own a plurality of television devices (TVs) in a home, but similarly, if it is attempted to receive the above-mentioned pay broadcast for each TV, the corresponding amount will increase. Since only a decoder is required, a plurality of receiving terminal devices are required in one home.

[0005] For this reason, reception terminal devices incorporating a recording medium have been proposed. The receiving terminal device directly records the received program data on a built-in recording medium. As a result, one receiving terminal device can be shared by a plurality of TVs, and a plurality of channels can be simultaneously recorded in the case of digital broadcasting.

However, if an illegal act such as dubbing and distributing the program data recorded on the built-in recording medium is performed, it becomes disadvantageous for the broadcasting station side. A system that can be viewed only by the contractor is required.

[0007] Therefore, in order to prevent unauthorized viewing, it is proposed that the program data to be recorded be recorded in a state before descrambling, and information for descrambling necessary for reproduction be recorded together with the program data. Have been.

[0008] Since the information for descrambling is coded with a unique identification code assigned to each receiving terminal device and transmitted, the program data can be decoded and reproduced only by the program. That is, only the receiving terminal device that has recorded the data. For this reason, it is not possible to view the program data recorded only in one home or the like where the receiving terminal device can be shared, and it is illegal to copy the program data and decode and view it on another receiving terminal device. Viewing can be prevented.

A proposal for recording and reproducing the scrambled program data is disclosed in, for example,
Japanese Patent Application Laid-Open No. 149449/1994 discloses a digital signal storage / transmission device, and Japanese Patent Application Laid-Open No. 7-303239 discloses a video / audio signal recording / reproducing device and a video / audio signal recording device.

[0010]

Here, for example, when a plurality of receiving terminal devices are owned by one household, one neighborhood association, or the like, a program recorded by one of the receiving terminal devices is used. There is a demand to share data (to be able to be reproduced by other receiving terminal devices).

However, a system for recording program data to be recorded in a state before descrambling, and recording information for descrambling required for reproduction together with the program data, reproduces the program data. Since it can only be performed by the receiving terminal device that recorded it,
Even within a limited group such as one family, one neighborhood association,
There was a problem that it became difficult to share program data.

Also, a receiving terminal device that records program data only records the program data, and receives viewing control information (parental control information) transmitted from the transmitting device to control the receiving terminal device. ) Is not performed, so that parental control cannot be performed on the reproduction of the recorded program data. For this reason, there has been a problem that a wide range of operations cannot be performed according to the age group of the viewers or the user level such as local viewing restrictions such as the above-mentioned one-home and one-town neighborhood associations.

Further, since the program data remains recorded on the recording medium of the receiving terminal device where the program data is recorded unless the program data is erased, the system has a low security level against unauthorized viewing. Was.

[0014] The present invention has been made in view of the above-mentioned problem, and allows program data recorded by a specific receiving terminal device to be shared within a predetermined group (a predetermined group). Data reception that enables parental control of recorded program data and improves the security level against unauthorized viewing. The purpose is to provide the device.

[0015]

A data receiving apparatus according to the present invention transmits handling control information, which is information relating to handling of data to be transmitted in accordance with a contract content, together with the data or separately from the data. A data receiving device for receiving the data and the handling control information from the side.

[0016] In order to solve the above-mentioned problem, handling control information storage means in which handling control information, which is information relating to handling of data in accordance with the contents of the contract with the transmitting side, is stored in advance; When the received data and the handling control information are received, the received handling control information is compared with the handling control information stored in the handling control information storage means. And control means for handling data indicated by the control information.

The handling control information may be, for example, information that permits data recording on the data receiving device side, or information that allows only a predetermined person to reproduce the recorded data. And a contract with the receiving side. The handling control information indicating the contents at the time of the contract is stored in advance in the handling control information storage means, while the transmitting side transmits the handling control information indicating the contents at the time of the contract together with the data when transmitting the data. I do.

When receiving the data and the handling control information from the transmitting side, the control means compares the received handling control information with the handling control information stored in the handling control information storage means. Then, only when both match, the data indicated by the received handling control information is handled.

Specifically, for example, when the handling control information permits recording of data to be transmitted, the data is recorded, and the handling control information permits reproduction of the recorded data. If there is, the data is reproduced.

In such a data receiving apparatus, matching between the handling control information from the transmitting side and the handling control information stored in the handling control information storage means is a condition for handling such as data recording and reproduction. Therefore, parental control for controlling data handling on the data receiving device side can be enabled by handling control information transmitted from the transmitting side.

For this reason, for example, if a contract is made to share data within a predetermined group at the time of contract, it is possible to record and reproduce data only within that group and prevent unauthorized use of data. However, the security level of the data receiving device can be improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a data receiving apparatus according to the present invention will be described below in detail with reference to the drawings.

The data receiving apparatus according to the present invention can be applied to a digital broadcast data receiving terminal apparatus for digitally broadcasting program data using a communication satellite.

First, the data receiving terminal device according to the first embodiment to which the present invention is applied has a configuration as shown in FIG. 1. Before explaining this, the data receiving terminal device must A digital broadcast station for transmitting data and the like will be described with reference to FIG.

In FIG. 2, the digital broadcasting station 30
When the input device 10 shown in FIG. 1 is operated and there is a request from a viewer or the like, the program database 3
1 (program DB), and each program data is read and supplied to each MPEG encoder 32.

Each of the MPEG encoders 32 performs a high-efficiency compression-encoding process on the supplied program data, and converts them into a transport stream multiplexer 33 (T
S.MUX: TS generation circuit).

In addition to the program data, the TS generation circuit 33 stores information on the program data from the program information DB 34, and stores and views each subscriber from the subscriber management DB 35. ECM information and EMM information including contract control information from the scramble control block 36, key information and its update information, and the like are supplied.

The TS generation circuit 33 multiplexes the information in units of, for example, 188-byte TS packets.
This is supplied to the scrambler 37. Scrambler 37
Performs scramble processing for each transport stream under the control of the scramble control block 36, and supplies this to the modulator 38. The modulator 38 modulates the scrambled transport stream at a predetermined frequency, and outputs this through an output terminal 39 to a transmission line to which each data receiving terminal device is connected in parallel.

Here, the subscriber management DB 35 is provided with a level corresponding to the contract condition of each viewer as shown in FIG. 3, and a recording identification code for permitting recording (accumulation) of the program, The playback identification code that allows playback of the program is
It is stored as the accumulation control information.

Specifically, for example, if the viewer makes this contract when the viewer wants to restrict the age-restricted program,
A reproduction identification code to which a level indicating a user who is permitted to view and a level indicating a user who is not permitted to view is stored and controlled in the subscriber management DB 35, and there is a request from the viewer. At this time, the reproduction identification code is multiplexed and transmitted in the transport stream of the program data.

For example, if the viewer makes this contract when he or she wants to watch within a predetermined group such as a home or a neighborhood association, a "reproduction permitted group level", which is a level indicating a group permitted to view, And a playback identification code to which a “per-terminal permission level”, which is a level of the data receiving terminal device permitting viewing in the group permitting viewing, is stored and controlled in the subscriber management DB 35, and a request from the viewer is received. When there is, the reproduction identification code is multiplexed and transmitted to the transport stream of the program data.

If this contract is made not only for reproduction but also for recording the program, a recording identification code with a "recording permission level", which is the level of the data receiving terminal device permitted to record, is added. The playback identification code is multiplexed and transmitted to the transport stream of the program data when a request is received from the viewer.

As will be described later, in the data receiving terminal device on the viewer side, the same identification code as each identification code multiplexed and transmitted from the digital broadcasting station to the transport stream is stored. The receiving terminal device detects a match between the transmitted identification code and the stored identification code, and records or reproduces the program data only when both match.

Next, the transport stream output from the digital broadcasting station to the transmission path is received by the data receiving terminal device according to the embodiment shown in FIG.

In the data receiving terminal device 1 according to the first embodiment shown in FIG. 1, the broadcast wave input via the input terminal 2 (the transport stream output from the digital broadcast station side to the transmission path) ) Is supplied to the demodulator 3. The demodulator 3 performs a predetermined demodulation process on the broadcast wave to form a baseband transport stream (TS) corresponding to the program data of the channel selected by the viewer.

This transport stream is transmitted to the descrambler 5 via the switch 4 during normal viewing.
The descrambler 5 cancels the scramble processing applied to the transport stream, and the MPEG decoder 6 performs a decoding process to convert the stream into program data. Then, the program data is encoded by the TV encoder 7 into a predetermined format, supplied to a television receiver connected to the output terminal 8, and displayed.

The TV encoder 7 is, for example, an NTS
Encodes a normal television signal or a high-definition television signal (HDTV signal) in accordance with the current television format such as the C system or the PAL system. In other words, the encoding operation to the input format corresponding to this is performed.

Information (EMM information and ECM information) for descrambling processing in the descrambler 5 is extracted by the descramble control block 9 and supplied to the descrambler 5, and is descrambled according to contract conditions and the like. 5, on / off control is performed.

Next, the recording operation of the program data of the program specified by the viewer in the data receiving terminal device 1 will be described.

In this case, first, the viewer uses the input device 1 such as a keyboard, a mouse, and a remote controller to notify the data receiving terminal device 1 of the viewer's intention.
By operating 0, the recording of the program data is designated. When this designation is made, the control information extraction circuit 11
The extraction of the storage control information multiplexed on the transport stream demodulated by the above is performed, and this is supplied to the comparison determination circuit 12.

The comparison / decision circuit 12 includes a control information extraction circuit 1
The record identification code is extracted from the storage control information extracted in step 1.

As described above, the data receiving terminal device 1
The storage device 13 stores in advance an identification code corresponding to the accumulation control information corresponding to the contract content. Specifically, as shown in FIG. 4, the storage device 13 stores an identification code for permitting recording and reproduction for each data receiving terminal device and an identification code for permitting recording and reproduction for each user, for each level. It is remembered.

The identification code for each data receiving terminal device is as follows:
For example, it is a code for managing viewing in a predetermined group such as a home or a neighborhood association, and the identification code for each user is a code for managing viewing for each individual such as father, mother, and child. .

When the recording identification code is extracted from the storage control information, the comparison determination circuit 12 reads out the recording identification code from the identification codes stored in the storage device 13 and determines whether or not the two match. .

If it is determined that the two do not match, the display control unit 21 storing character data such as various messages to the viewer transmits character data corresponding to the message indicating that recording is not permitted. , And supplies it to the television receiver via the output terminal 8. Thereby, the message is displayed on the screen of the television receiver, and the viewer recognizes that the program cannot be recorded.

When the comparison and determination circuit 12 determines that the two coincide with each other, it supplies the recording identification code read from the recording device 13 to the error correction code adding block 13.

The error correction code adding block 13 adds an error correction code to the identification code, and supplies this to the encryption block 14. The encryption block 14 encrypts the identification code to which the error correction code is added, and
It is supplied to the D multiplexing circuit 15. The ID multiplexing circuit 15 multiplexes the encrypted identification code into a predetermined area of the transport stream from the demodulator 3, and multiplexes the multiplexed identification code via a connector terminal 24a, 24b into, for example, a hard disk or a video recording / reproducing disk. And so on.

The recording / reproduction control circuit 16 controls the recording on the recording medium 17 of the transport stream in which the identification code is multiplexed. Thus, it is possible to record the program data only in the data receiving terminal device permitted at the time of the contract. In other words, the parental control for controlling the recording / reproducing operation on the data receiving terminal device side from the digital broadcast station side can be performed by the storage control information multiplexed on the transport stream of the program data.

Further, since the identification code is multiplexed on the transport stream of the program data and recorded on the recording medium 17, the reproduction is performed as long as the identification code does not coincide with the reproduction described below. However, it is possible to prevent unauthorized viewing by a viewer or a terminal device having no identification code and provide a system with a high security level.

The recording medium 17 may be used in combination with a plurality of so-called IC cards or other recording media.

The identification code is multiplexed and recorded in the transport stream of the program data.
This is because the storage area of the recording medium 17 is divided into a storage area for identification code and a storage area for program data, and the identification code or the transport stream of the program data is separately recorded in each of these areas. You may.

In this case, the transport stream of the program data from the demodulator 3 is transmitted to each of the connector terminals 24a, 24a.
4b, and supplies the identification code from the encryption block 14 to the recording medium 17,
The recording and reproduction control circuit 16 may control the storage in each of the areas. Thereby, the ID multiplexing circuit 15 required for recording and the ID separation circuit 18 described in the operation at the time of reproduction can be omitted, and the configuration of the data receiving terminal device 1 is simplified. be able to.

Next, the operation of reproducing the program data recorded on the recording medium 17 will be described.

In this case, first, the viewer operates the input device 10.
To specify the reproduction of the program data. When the reproduction is designated, the data receiving terminal device 1 selects the reproduction output from the recording medium 17 and controls the switch 4 so as to supply it to the descrambler 5. Further, the recording and reproduction control circuit 16 reads and controls the transport stream recorded on the recording medium 17 and supplies the transport stream to the descrambler 5 and the ID separation circuit 18 via the switch 4.

The ID separation circuit 18 extracts an identification code multiplexed and recorded in a predetermined area of the transport stream at the time of the above-mentioned recording, and supplies this to the decoding block 19. The decryption block 19 includes the encryption block 1
4 to decode the encrypted identification code and supply it to the error correction code check block 20. The error correction code check block 20 checks and corrects the error of the identification code, and supplies the same to the comparison determination circuit 12.

Here, in the storage device 23, an identification code unique to the data receiving terminal device according to the contract with the digital broadcasting station is stored in advance for each level. The comparison determination circuit 12 reads the reproduction identification code permitted for the data receiving terminal device from the storage device 23,
The reproduction identification code is extracted from the identification code for which the error has been checked and corrected by the error correction code check block 20. Then, it is determined whether or not the two match, and this determination output is supplied to the descrambling control block 9.

When the discrimination output indicating that the two do not match is supplied from the comparison / determination circuit 12, the descramble control block 9 supplies the transport stream reproduced from the recording medium 17 to the descrambler. 5, the descrambling operation is forcibly stopped, and the character data corresponding to the message indicating that the reproduction / viewing is not permitted is read from the display control unit 21 in which character data such as various messages to the viewer are stored. Then, this is supplied to the television receiver via the output terminal 8.

As a result, the message is displayed on the screen of the television receiver, and it is possible to make the viewer recognize that the program cannot be viewed by reproducing the program, and to receive data without permission from the digital broadcasting station. It is possible to prevent illegal reproduction and viewing on the terminal device.

On the other hand, the descramble control block 9 is supplied to the descrambler 5 via the switch 4 when the comparison output is supplied from the comparison / decision circuit 12 indicating that the two coincide with each other. The descrambler 5 is controlled so that the transport stream is descrambled.

The transport stream descrambled by the descrambler 5 is supplied to the TV encoder 7 as program data by being decoded by the MPEG decoder 6. Then, the signal is encoded into a television signal format by the TV encoder 7 and supplied to the television receiver via the output terminal 8. As a result, an image corresponding to the program data reproduced from the recording medium 17 can be displayed on the screen of the television receiver.

The encryption block 14 and the decryption block 19 may be detachable from the data receiving terminal 1 as one module 22. That is, by using this module 22 as a removable storage means such as an IC card, for example, data for encryption can be updated, and a system with a higher security level can be provided. .

In the above description, the descrambling operation of the descrambler 5 is stopped when the two do not match in order to prevent unauthorized viewing. 16, the recording medium 1
7 may be stopped. As a result, unauthorized viewing can be prevented as described above. Or, if the two do not match,
A part of the descramble operation of the descrambler 5 may be stopped. Specifically, by stopping a part of the descrambling operation, an incompletely reproduced image is supplied to the television receiver to make the screen intentionally difficult to view. This can also prevent unauthorized viewing.

Here, the data receiving terminal device 1 is designed so that the viewer can view the program by operating the input device 10 and inputting the reproduction identification code.

In this case, the comparison determination circuit 12 compares the reproduction identification code input from the input device 10 operated by the viewer with the reproduction identification code extracted from the identification code from the error correction code check block 20. If they do not match, a message is displayed via the display control unit 21 indicating that the message cannot be reproduced because the identification codes do not match.

The viewer sees this message and re-enters the identification code. If the identification code still does not match, the comparison / judgment circuit 12 determines the number of times this identification code does not match. It counts and controls the display of the number of discrepancies in the identification code via the display control unit 21. If the number of discrepancies reaches a predetermined number set by the system, the program recorded on the recording medium 17 Controls the display of a message to forcibly delete data.

Then, after the message is displayed, the number of times of discrepancy of the identification code is still added up.
Issue a forced erasure command. When this forced erasing command is issued, the forced erasing circuit 25 sets the connector terminals 24a and 24b.
Forcibly deletes the program data recorded on the recording medium 17 via. As the forced erasure, all the program data or a part of the program data such as an information part necessary for descrambling is erased.

After the forced erasure, the comparison and judgment circuit 1
2 controls display of a message indicating that program data has been forcibly erased via the display control unit 21. Thus, the viewer recognizes that the program data has been forcibly erased.

In the case where the reproduction identification code input from the viewer at the time of reproduction does not match the reproduction identification code multiplexed with the program data, the recording medium 17 is written to the recording medium 17 in accordance with the number of mismatches. By forcibly erasing the recorded program data, even if the program data is recorded on the recording medium 17, it is possible to strongly prevent unauthorized viewing of the program data. Security level can be improved.

An identification code is multiplexed in the transport stream of the program data recorded on the recording medium 17, and reproduction thereof requires the same identification code as the multiplexed identification code. The reproduction of the program data recorded on the recording medium 17 can also be managed by the digital broadcasting station, and parental control can be performed.

Next, the recording medium 17 provided in the data receiving terminal device 1 of this embodiment
The recording medium 17 can be lent or exchanged by means of a and 24b so that it can be viewed and listened to within a predetermined group set at the time of contract, such as a neighborhood association. I have.

Specifically, as shown in FIG. 5, a total of five data receiving terminal devices whose levels are respectively set according to contract conditions are registered as a first group consisting of user A's house to user E's house. And the data receiving terminal device (identification code = XXX-X)
XX0), if program data is recorded,
For example, the storage control information as shown in FIG. 3 is multiplexed and recorded on the transport stream of the program data on the recording medium 17 of the data receiving terminal device installed in the user A's house.

That is, in FIG. 3, the reproduction permission level for each terminal device in this case is “level 1” and the permission level for each user is “level 2”.
7, these identification codes are multiplexed and recorded on the program data as the storage control information.

As a result, "level" and "identification code" are set for each data receiving terminal device of the first group and for each user.

Here, in FIG. 5, the recording medium 17 on which the program data is recorded by the data receiving terminal device at the home of the user A is shown.
Is detached via the connector terminals 24a and 24b, and the user tries to reproduce the program data by attaching it to the data receiving terminal device at the home of the user B, the identification code recorded on the recording medium 17 is the data of the home of the user A. Since the level is “level 1” permitted by the receiving terminal device, the comparison and determination circuit 12
As a result, the discrepancy of the identification code is detected and the reproduction becomes impossible. Similarly, reproduction is impossible at the home of user C (level 2) and the home of user D (level 3) having an identification code different from “level 1”.

On the other hand, at the user C's house, the level of the data receiving terminal is “level 2” which is the same level as the data receiving terminal at the user A's house. Thus, the user can view the program recorded on the recording medium 17 after the coincidence of the identification codes is detected.

It should be noted that data cannot be reproduced at all by a data receiving terminal device outside this group.

As described above, for each data receiving terminal device and each user, the “level” and “identification code”
Is set, a plurality of subscribers can be grouped into one group, and program data can be shared and viewed only within this group. In addition, the digital broadcasting station can set a fee for each viewing level, and can perform a fine charging process on recorded program data.

The recording medium 17 is connected to each connector terminal 24.
a and 24b, the user can exchange the recording medium 17 between users of each level,
A library and sharing of program data can be achieved, and convenience can be improved.

Next, the data receiving terminal device can enable viewing restriction not only in such a group but also at home.

That is, in this case, as shown in FIG. 6, a first data receiving terminal installed in a living room or the like is used as a master terminal 1, and a second data receiving terminal installed in a child's room or the like is used as a master. As the slave terminal device 45, each of the terminal devices 1 and 45 has a relationship between a master device and a slave device. The program data is supplied to the slave terminal device 45 via the master terminal device 1 that receives the broadcast wave.

Specifically, the master terminal device 1 in this case is
The configuration shown in FIG. 7 is as shown in FIG. 7. In addition to the configuration of the data receiving terminal shown in FIG. 1, the communication device 53 for performing communication with the slave terminal and the demodulator 3 A selection switch 50 for selecting program data and program data reproduced from the recording medium 17;
And a control switch 51 for controlling the output of any of the program data selected by the above to the slave terminal device side.

Since the other configuration is the same as that of the data receiving terminal device shown in FIG. 1, the same reference numerals in FIG. 6 denote parts showing the same operations as those in FIG. I do.

The configuration of the slave terminal device is a simplified configuration in which circuits necessary only for reproducing program data are provided as shown in FIG. This slave terminal device 4
In response to the viewing request from 5, the viewer operates the input device 63 to select whether to view the program currently received on the master terminal device 1 side or to view the program recorded on the recording medium 17. Do it. This request command is transmitted to the communication connector 62 and the communication connector 54 shown in FIG.
Is transmitted to the master terminal device 1 via the communication terminal 53 and supplied to the communication device 53.

When the request command from the slave terminal 45 requests the transmission of the program data currently received by the master terminal 1, the communication device 53 transmits the program from the demodulator 3. The selection switch 50 is selectively controlled so as to select data, and the control switch 51 is ON-controlled. The request command from the slave terminal device 45 is transmitted to the recording medium 1 via the recording / reproduction control circuit 16.
7, the reproduction control of the program data is performed, the selection switch 50 is selectively controlled so as to select the program data subjected to the reproduction control, and the control switch 51 is turned on.

As a result, the program data currently received on the master terminal device 1 side or the program data reproduced from the recording medium 17 are transmitted to the external output terminal 52 and the external input terminal 55 of the slave terminal device 45 shown in FIG. The data is supplied to the descrambler 56 via the interface.

The descramble control circuit 57 controls the descrambling process of the program data supplied to the descrambler 56. The descrambled program data is decoded by the MPEG decoder 58, converted into a predetermined TV format by the TV encoder 59, and supplied to the television receiver in the children's room via the output terminal 60.

In the master terminal device 1 and the slave terminal device 45, when the master terminal device 1 records program data, the storage control information for the program data to be recorded is also recorded. You. Assuming that the reproduction permission level for each terminal indicated by the accumulation control information is “level 1”, the master terminal device 1 selects one of the identification codes stored in advance in the storage device 23 in accordance with the contract. "Level 1" from among the identification codes
, And the “level 2” identification code is similarly recorded as an identification code for each user.

When a request command to reproduce the recorded program data is supplied from the slave terminal device 45, the master terminal device 1 transmits the identification code extracted from the program data reproduced from the recording medium 17 as described above. Is compared with the identification code stored in the storage device 23.

In this case, assuming that the level of the identification code of the slave terminal device 45 is “level 3”, since the identification code of the slave terminal device 45 is not recorded on the recording medium 17, the master terminal device 1 Control switch 5
1 is turned off, and a message to the effect that viewing is prohibited read from the display control unit 21 via the communication device 53 is transmitted to the slave terminal device 45 side.

Thus, unauthorized viewing due to a request from the slave terminal device 45 can be prevented.

As described above, the data receiving terminal device is
In such a form like a parent-child terminal device,
Parental control can also be performed with respect to viewing of program data stored in the recording medium 17 by the slave terminal device 45.

Next, a data receiving terminal device according to a second embodiment of the present invention will be described.

In the data receiving terminal device according to the first embodiment, the "storage control information" is multiplexed with the program data and transmitted through the same communication line. In the data receiving terminal device, the program data and the storage control information are transmitted through different communication lines.

That is, the data receiving terminal device according to the second embodiment has the configuration shown in FIG. In addition,
In FIG. 9, the same reference numerals are given to the portions indicating the same operations as those of the respective portions of the data receiving terminal device of the above-described first embodiment, and redundant description will be avoided.

That is, the data receiving terminal device according to the second embodiment has a communication device 66 that receives the storage control information from the digital broadcast station side and supplies it to the comparison determination circuit 12.

In this case, the configuration of the digital broadcasting station is to transmit the storage control information from the TS generation circuit 33 to the data receiving terminal through a communication line different from the program data, as shown by the dotted line in FIG. A communication device 40 is provided.

In such a data receiving terminal device,
The digital broadcasting station and the data receiving terminal device are connected to terminal 4
1 and 65 via a telephone line. When the data receiving terminal device attempts to record a program, communication is performed between the communication devices 40 and 66 via the telephone line, and negotiation is performed on the program to be recorded and the viewing level.

The digital broadcasting station transmits the storage control information corresponding to the contract conditions established by the negotiation to the data receiving terminal via the communication line. Then, the data receiving terminal device which has received this performs viewing management of the viewer in the same manner as described above. Thus, even if the storage control information is transmitted on a communication line different from the program data, the same effect as that of the data receiving terminal device of the first embodiment can be obtained.

Finally, the description of each of the above embodiments is merely an example of the present invention, and various modifications may be made in accordance with the design and the like without departing from the technical concept of the present invention. Is of course possible.

[0100]

According to the data receiving terminal device of the present invention, parental control of data handling on the data receiving terminal device side can be performed from the transmitting side in accordance with the contents of the contract.

Therefore, it is possible to make viewing and the like in a predetermined group unit by contract, and it is possible to prevent unauthorized use of data and improve the security level of the data receiving terminal device. . Further, it is possible to perform various charging managements on the transmission side in accordance with the data use mode.

[Brief description of the drawings]

FIG. 1 is a block diagram of a data receiving terminal device according to a first embodiment to which a data receiving device according to the present invention is applied.

FIG. 2 is a block diagram of a digital broadcasting station that transmits program data and the like to the data receiving terminal device according to the first embodiment.

FIG. 3 is a diagram showing storage control information multiplexed on a transport stream of the program data.

FIG. 4 is a diagram showing the contents of the accumulation control information.

FIG. 5 is a diagram showing an example in which program data can be shared among a plurality of data receiving terminal devices.

FIG. 6 is a diagram for explaining an example in which the data receiving terminal device is used as a parent-child terminal device.

FIG. 7 is a block diagram of a master terminal device (master device side) when the data receiving terminal device is used as a parent-child terminal device.

FIG. 8 is a block diagram of a slave terminal device (child device side) when the data receiving terminal device is used as a parent-child terminal device.

FIG. 9 is a block diagram of a data receiving terminal device according to a second embodiment to which the data receiving device according to the present invention is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data receiving terminal device, 3 ... Demodulator, 4 ... Switch,
Reference numeral 5: descrambler 6: MPEG decoder, 7: TV encoder, 9: descramble control circuit 10: input device, 11: control information extraction circuit, 12: comparison determination circuit 13: error correction code addition block, 14: encryption block 15 ... ID multiplexing circuit, 16 ... Recording / reproduction control circuit, 17 ...
Recording medium 18 ID separation circuit 19 Decoding block 21 Display control unit 20 Error correction code check block 24a, 24
b: Connector terminal 25: Forced erasure circuit

Continuing from the front page (72) Inventor Shinichi Ooi 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Multimedia Technology Research Laboratories (72) Shoichi Koike 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Stock Company (72) Inventor Takuji Kimura 8-8 Shinsugitacho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture In-house Toshiba Multimedia Technology Research Laboratories (72) Isao Miyazaki 3-3-9, Shimbashi, Minato-ku, Tokyo No. Toshiba Abu E Co., Ltd. (72) Inventor Keiko Ando 3-3-9 Shimbashi, Minato-ku, Tokyo Toshiba Abu E Co., Ltd. (72) Inventor Mamoru Ota Minato-ku, Tokyo 3-9-9 Shimbashi Inside Toshiba Abu E Co., Ltd.

Claims (6)

[Claims] Claims: 1. A transmitting side, which transmits handling control information, which is information relating to handling of data to be transmitted according to a contract content, together with the data or separately from the data.
A data receiving apparatus for receiving the data and the handling control information, wherein handling control information storage means in which handling control information, which is information relating to handling of data according to a contract with the transmitting side, is stored in advance, When the data and the handling control information from the side are received, the received handling control information is compared with the handling control information stored in the handling control information storage means. And a control unit for handling data indicated by the handling control information. 2. A storage means for storing data and handling control information transmitted from the transmitting side, wherein the controlling means permits the handling control information transmitted from the transmitting side to record data. Yes, when the two coincide, the handling control information transmitted from the transmitting side is multiplexed with data and stored and controlled in the storage means, or the handling control information and data transmitted from the transmitting side,
2. The data receiving apparatus according to claim 1, wherein storage control is performed in each dedicated area of said storage means. 3. The handling control information stored in the storage means together with the data when the reproduction of the data stored in the storage means is designated, and the handling control information stored in the handling control information storage means. 3. The data receiving apparatus according to claim 2, wherein the handling control information is read out and compared, and only when the two match, the data stored in the storage unit is output controlled. 4. The control means counts the number of continuous mismatches between the two each time reproduction of data stored in the storage means is designated, and determines that the count value is equal to or greater than a predetermined count value. 4. The data receiving apparatus according to claim 3, wherein when the number of data items becomes shorter, all or a part of the data stored in the storage unit is controlled to be erased. 5. The control means displays and controls the number of continuous mismatches between the two, which is counted every time reproduction of data stored in the storage means is designated, and is stored in the storage means. 5. The data receiving apparatus according to claim 4, wherein display control is performed on the number of times of continuous mismatch between the data and the entire data until the whole or a part of the data is erased. 6. The storage means, when storing and controlling the handling control information in the storage means, performs a predetermined encryption process on the handling control information to perform storage control, and controls the storage means in the storage means. 6. The reproduction method according to claim 2, wherein, when controlling reproduction of the control information, the handling control information is subjected to decryption processing corresponding to the predetermined encryption processing and reproduced. Data receiving device.