JPH10224752A - Audio video signal transmitter, receiver, transmitter-receiver and transmitter, audio video signal transmission method, reception method, transmission reception method and transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an audio signal and a video signal from being illegally copied without deteriorating the audio signal and the video signal. SOLUTION: In the case of sending an audio visual(AV) signal from a device 10 to a device 20, a communication control section 12 of the device 10 acquires copyright information of the AV signal and authentication information of the device 20. The authentication information includes an operating state of the device 20 such as a state of a recording operation or a state of a display operation and functions of the devices. When the communication control section 12 acquires the authentication information denoting that the device 20 is in a recording state and copyright information denoting that the transmitted AV signal is inhibited to copy, the control section 12 inhibits the transmission of the AV signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio / video signal transmitting apparatus for preventing unauthorized duplication of audio and video information recorded on a recording medium, for example, in order to protect the copyright of the information. TECHNICAL FIELD The present invention relates to a receiving device, a transmitting / receiving device, a transmitting device, and an audio / video signal transmitting method, a receiving method, a transmitting / receiving method, and a transmitting method.

[0002]

2. Description of the Related Art Conventionally, for the purpose of protecting the copyright of a video signal, for example, a macrovision signal or a copy protection signal of a color stripe method is added to a composite video signal to prevent duplication of the video signal. It is known to

[0003]

However, even if a copy protection signal is added to a composite video signal, such as a macro vision signal or a color stripe type copy protection signal, a baseband signal such as an RGB signal is generated. Cannot be applied to

[0004] Even if a copy protection signal is added, if a device is physically connected, a video signal will be output regardless of the type and function of the connected device.

The present invention has been made in view of such circumstances, and illegally duplicates audio signals and video signals transmitted and recorded on a recording medium without deteriorating the signals. It is an object of the present invention to provide an audio / video signal transmitting apparatus, a receiving apparatus, a transmitting / receiving apparatus, and a transmitting apparatus, and a transmitting method, a receiving method, a transmitting / receiving method, and a transmitting method of an audio / video signal. .

[0006]

In order to solve the above-mentioned problems, an audio / video signal transmitting apparatus according to the present invention comprises: a reproducing means for reproducing an audio / video signal and its copyright information; Transmitting means for transmitting a video signal to an external device; communication means for communicating authentication information with the external device; audio transmitting from the signal processing means to the external device based on the copyright information and the authentication information A signal control means for controlling a video signal;

[0007] The audio / video signal transmitting apparatus controls the transmission of the audio / video signal based on the copyright information and the authentication information.

[0008] Further, the audio / video signal receiving apparatus according to the present invention is provided with an audio / video signal transmitted from an external device.
Receiving means for receiving a video signal, signal processing means for performing signal processing on the audio / video signal, communication means for communicating authentication information with the external device, and signal processing content of the signal processing means, Signal communication means for controlling authentication information communicated by the communication means.

In the audio / video signal receiving apparatus, the authentication information is supplied to the source of the audio / video signal to control the transmission of the audio / video signal.

[0010] An audio / video signal transmitting / receiving apparatus according to the present invention includes a receiving means for receiving an audio / video signal transmitted from a first external device, and performs signal processing on the received audio / video signal. Signal processing means, transmission means for transmitting the audio / video signal processed by the signal processing means to a second external device, and copyright information of the audio / video signal transmitted to the first external device Communication means for communicating authentication information with a second external device, and from the signal processing means to the external device based on the copyright information, the authentication information, and the signal processing content of the signal processing means. Signal control means for controlling an audio / video signal to be transmitted.

In the audio / video signal transmitting / receiving apparatus, the transmission of the audio / video signal is controlled based on the copyright information of the received audio / video signal and the authentication information of the destination, and the authentication information of the apparatus is transmitted to the audio / video signal. Supply to the source of the video signal to control the transmission of the audio / video signal;

[0012] Also, an audio / video signal transmitting apparatus according to the present invention includes a reproducing unit for reproducing an audio / video signal and copyright information thereof, a transmitting unit for transmitting the audio / video signal, Signal transmission means having a first communication unit for communicating, a first signal control unit for controlling an audio / video signal transmitted from the transmission unit based on the copyright information and the authentication information, and the signal transmission A receiving unit for receiving the audio / video signal transmitted from the means, a signal processing unit for performing signal processing on the audio / video signal, and a second communication unit for communicating authentication information with the first communication unit. And a second signal control unit that controls authentication information communicated by the second communication unit based on the signal processing content of the signal processing unit.

The audio / video signal transmission device controls the transmission of the audio / video signal based on the copyright information and the authentication information.

Also, in the audio / video signal transmitting method according to the present invention, the audio / video signal and its copyright information are reproduced, the authentication information is obtained, and the audio / video signal is reproduced based on the copyright information and the authentication information. It is characterized by controlling transmission of an audio / video signal.

Further, according to the audio / video signal receiving method of the present invention, an audio / video signal is received, the received audio / video signal is processed, and the content of the received audio / video signal is processed. Based on
The authentication information is supplied to a source of the audio / video signal.

Also, the audio / video signal transmitting / receiving method according to the present invention receives an audio / video signal,
The copyright information of the audio / video signal was received, the signal processing of the received audio / video signal was performed, the authentication information was obtained, and the signal processing was performed based on the copyright information, the authentication information, and the signal processing content. It is characterized by controlling transmission of an audio / video signal.

An audio / video signal transmission method according to the present invention is a method for transmitting an audio / video signal by transmitting a reproduced audio / video signal and receiving the transmitted audio / video signal. The transmitting side reproduces the audio / video signal and its copyright information, transmits the reproduced audio / video signal, and the receiving side receives the transmitted audio / video signal, and performs signal processing on the received audio / video signal. Then, based on the content of the signal processing of the received audio / video signal, the authentication information is supplied to the transmission side of the audio / video signal, and the transmission side acquires the authentication information, and based on the copyright information and the authentication information, The transmission of the reproduced audio / video signal is controlled.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a device 10 in which an audiovisual signal (hereinafter simply referred to as an AV signal) reproduced from the device 10 cannot be illegally copied by the device 20.
1 illustrates a communication system according to a first embodiment between a communication device and a device 20. The device 10 and the device 20 are connected via the composite cable 1.

The device 10 is a reproducing device for reproducing an AV signal recorded on a recording medium. The device 10 includes a signal processing unit 11, a communication control unit 12 for communicating with a device 20 connected to the device 10, and a collective output terminal 13 for connecting the device 20 and the composite cable 1.

The signal processing section 11 has a reproducing circuit for reproducing an AV signal recorded on a recording medium, and a transmitting circuit for transmitting the AV signal to the outside. The reproduction circuit of the signal processing unit 11 reproduces an AV signal from a recording medium, for example, an optical disk, a magnetic disk, a magnetic tape, and supplies the signal to a transmission circuit. The transmission circuit of the signal processing unit 11 transmits the AV signal to the device 20 via the composite cable 1.

Here, the AV signals transmitted from the device 10 to the device 20 are analog video signals and audio signals such as an RGB signal, a Y color difference signal, a composite video signal + audio signal, and a Y + C signal.

Further, the signal processing unit 11 transmits A
The copyright information is reproduced together with the V signal, and the copyright information is supplied to the communication control unit 12.

The copyright information indicates whether the video and audio recorded on the recording medium can be duplicated, and is provided for the purpose of protecting the copyright of the video and audio. The copyright information indicates whether the video and audio recorded on the recording medium can be duplicated, or the management information of the duplicate generation.

The communication control section 12 has a control circuit having a control function and a communication circuit having a bidirectional communication function. The communication control unit 12 controls the prohibition of the transmission of the AV signal and the permission of the transmission based on the copyright information supplied from the signal processing unit 11 and the authentication information transmitted from the communication control unit 22 of the device 20 described later. .

The device 20 transmits the AV transmitted from the device 10
A monitor device for receiving a signal and displaying the AV signal,
This is a recording device that records this AV signal on a magnetic tape, an optical disk, or the like. The device 20 includes a signal processing unit 21 and a communication control unit 2 that communicates with the device 10 connected to the device 20.
2 and a collective input terminal 23 for connecting the device 10 and the composite cable 1.

The signal processing section 21 has a receiving circuit for receiving the transmitted AV signal, and a signal processing circuit for performing signal processing on the received AV signal. The signal processing content of the signal processing unit 21 differs depending on the type of device of the device 20. For example, if the device 20 is a monitor device, it performs a process of displaying the received AV signal on a screen, and if it is a recording device, it performs a process of recording the AV signal on an optical disk, a magnetic disk, a magnetic tape, or the like.

The communication control section 22 has a control circuit having a control function and a communication circuit having a bidirectional communication function.
The communication control unit 22 manages authentication information unique to the device 20, and also manages the operation state of the device 20, that is, the signal processing content of the signal processing unit 21.

Here, the authentication information is information indicating the type and function of the device, address information for specifying the device, the operation state of the device, and the like. That is, if the device is a recording device,
Information indicating that the device is a recordable device, information indicating a state in which the recording device is operating and recording data, and the like.

The communication control unit 22 performs bidirectional communication with the communication control unit 12 of the device 10, and exchanges these authentication information.

The composite cable 1 for connecting the device 10 and the device 20 is a single cable formed by combining signal lines for transmitting or communicating signals between the devices.
That is, the composite cable 1 communicates with a signal line of an AV signal, for example, a signal line of an RGB signal, a signal line of a composite video signal + an audio signal, and a signal line of an analog video signal and an audio signal such as a Y + C signal. Control unit 12
And a communication line for performing two-way communication between the communication control unit 22.

At both ends of the composite cable 1, collective connectors 1a and 1b are provided, respectively. Furthermore, the device 10 and the device 20 have the collective connector 1
A group output terminal 13 and a group output terminal 23 are provided so as to correspond to a and 1b.

These collective terminals 13 and 23 are, for example,
Like S (separate) video terminals provided in commercially available AV equipment, all signal lines can be transmitted by one cable, and there is no need to handle a plurality of cables even when detaching or connecting. . That is, at the same time that the signal line of the AV signal is connected, a communication line for the communication control units 12 and 22 to perform bidirectional communication is connected.

Next, a case where the device 10 reproduces a recording medium in the communication system will be described with reference to a flowchart shown in FIG.

In the device 10, the signal processing section 11 reproduces the AV signal recorded on the recording medium, and transmits the analog AV signal from the collective output terminal 13. At this time, the signal processing unit 11 simultaneously reproduces the copyright information of the AV signal, and supplies the copyright information to the communication control unit 12.

When reproduction is started and the copyright information is supplied, the communication control unit 12 confirms the copyright information.
That is, the communication control unit 12 determines from the copyright information whether the AV signal reproduced from the recording medium can be freely copied, is prohibited from being copied, or is copied only for one generation. It is determined whether it is possible (step S1).

If the communication control unit 12 determines that copying of the AV signal to be reproduced from the copyright information is possible, this A
The output of the V signal is permitted, and the AV signal is transmitted from the signal processing unit 11 (step S2).

If the communication control unit 12 determines that copying of the AV signal to be reproduced from the copyright information is prohibited or determines that copying of only one generation is possible, the authentication information from the device 20 is used. It is determined whether the device connected from is correct (step S3). If it is determined that the device is correct, the output of the AV signal is permitted (step S2). If it is determined that the device is not the correct device, the output of the AV signal is stopped (step S4), and the AV signal is output.
Output a message to stop signal output (step S
5).

The determination as to whether the device 20 is the correct model is made specifically when the AV signal to be reproduced is prohibited from being copied.
It is determined from the authentication information whether the device 20 to which the AV signal is transmitted is a non-recording device, for example, a monitor device. If the device 20 is a non-recording device, the output of the AV signal is permitted,
An AV signal is transmitted from the signal processing unit 11. Further, even if the device 20 is a recording device, for example, a recording device, the output of the AV signal is permitted when the recording device is not in the recording state. This is because, for example, when a playback device and a monitor device are connected, a so-called cascade connection in which the playback device and the monitor device are connected via a recording device may be performed. When the recording device is not in the recording state, the output of the AV signal is permitted. The case where such a cascade connection is performed will be described later in detail.

When the AV signal to be reproduced can be copied for only one generation, the output of the AV signal is permitted. At this time, the communication control unit 12 transmits to the communication control unit 22 of the device 20 copyright information of an AV signal indicating that only one generation can be copied. When the device 20 is a recording device and is in a recording state, the communication control unit 22 records, on a recording medium, copyright information indicating that copying is prohibited, together with an AV signal. As a result, when a recording medium on which an AV signal that can be copied only for one generation is recorded is copied to another recording medium, the copied recording medium is re-copied to the next recording medium. Can not.

The above steps S1 to S
The processes up to 5 are performed at regular intervals after the devices 10 and 20 are connected and turned on. For this reason,
For example, if the device 20 enters the recording state from where it is not, the state can be detected and transmission can be prohibited. Further, if copying of a part of the AV signal recorded on the recording medium to be reproduced is prohibited, transmission can be prohibited only when the part is reproduced. At this time, a message indicating that the output has been stopped due to copyright protection is output because the device is not at fault.

As described above, in the communication system according to the first embodiment, when the device 10 transmits an AV signal to the device 20, only when the device 20 determines that the device 20 is the correct connection partner based on the authentication information. A signal is transmitted, and transmission from the device 10 is prohibited if the device is not the correct connection partner. Therefore, it is possible to prevent illegal duplication of these signals without deteriorating the audio signal and the video signal. Also,
Unauthorized duplication can be prevented without interfering with the connected device.

Further, by using the composite cable 1 having a single signal line for connection between the device 10 and the device 20, the above-mentioned exchange of the authentication information between the devices can be ensured. By not making it compatible with, it is possible to avoid the danger of being connected to another model and being duplicated.

The communication control unit 12 described in the above embodiment can communicate additional information in addition to the authentication information and the copyright information. In this case, the additional information is device information such as a device type, a serial number, a device-specific address, and the like, device setting information, communication information, and the like. Control such that recording can be performed only by the device can be performed.

FIG. 3 illustrates a communication system according to a second embodiment in which the devices 20 and 30 are connected in cascade to the device 10. In describing the communication system according to the second embodiment, components having the same functions as those in the above-described first embodiment will be denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted. . Note that the same applies to the following third embodiment. The device 10 and the device 20 are connected via the composite cable 1. The device 20 and the device 30 are connected via the composite cable 1.

The device 30 transmits the AV transmitted from the device 10
A monitor device for receiving a signal and displaying the AV signal,
A recording device for recording this AV signal on a magnetic tape, an optical disk, or the like. The device 30 includes a signal processing unit 31, a communication control unit 32 for communicating with the devices 10 and 20 connected to the device 30, a collective input terminal 33 for connecting the device 10 and the composite cable 1, and a device 20. And composite cable 1
And a set input terminal 34 for connecting Equipment 30
Is a device 1 having both input and output terminals.
0 and the device 20, and the signal processing unit 31 includes:
It differs in having a signal processing circuit for performing signal processing of the AV signal and a receiving circuit and a transmitting circuit for the AV signal.
That is, the device 30 is, for example, a monitor device having an input / output terminal or a recording device that records an AV signal on a magnetic tape, an optical disk, or the like.

The communication control unit 32 of the device 30 has a control circuit having a control function and a communication circuit having a bidirectional communication function with both the device 10 and the device 20. Based on the copyright information supplied from the communication control unit 12 and the authentication information transmitted from the communication control unit 22 of the device 20, the control of the inhibition of the transmission of the AV signal transmitted from the device 30 to the device 20 and the control of the permission of the transmission are performed. Do. Further, the communication control unit 32 manages authentication information unique to the device 30,
The content of the signal processing of the signal processing unit 31 is managed. The communication control unit 32 performs two-way communication with the communication control unit 12 of the device 10, and exchanges authentication information. That is, the communication control unit 32 supplies the authentication information to the communication control unit 12 of the device 10 based on the processing content of the signal processing unit 31 and the like.

More specifically, if the device 20 is a recording device and the device 30 is a monitor device,
The AV signal is always transmitted to 0. However, the device 30
From the device 20 to the device 20.
Transmission of the V signal is prohibited due to the contents of the copyright information. When the device 20 is a monitor device and the device 30 is a recording device, an AV signal is transmitted from the device 10 to the device 20 via the device 30 when the device 30 is not in a recording state. However, when the device 30 is in the recording state, transmission of the AV signal from the device 10 to the device 30 is prohibited due to the content of the copyright information.

That is, the communication control unit 32 of the device 30
It has the functions of both the communication control unit 12 of the device 10 and the communication control unit 22 of the device 20 described above.

The communication control unit 32 of the device 30 may supply the authentication information of the device 20 to the communication control unit 12 of the device 10 as well as the authentication information of the device 30. In this case, even when the device 30 is a monitor device, transmission of the AV signal from the device 10 can be prohibited.

In the communication system according to the second embodiment, reliable copy control can be performed even between a plurality of cascade-connected devices.

In the above-described second embodiment, the case where three models are connected in cascade has been described. However, the number of models cascaded may be larger.

FIG. 4 illustrates a communication system according to a third embodiment when a plurality of devices 20 are connected in parallel to the device 10a. The device 10a and each device 20 are connected via the composite cable 1. The device 20 is the same as in the first embodiment described above.

The device 10a includes a signal processing unit 11, a communication control unit 12a for communicating with each device 20 connected to the device 10a, and collective input terminals 13a and 13b for connecting the device 20 and the composite cable 1. Is provided. The device 10a
It differs from the device 10 of the first embodiment in that it has a plurality of collective output terminals. For example, when connecting from one device having a plurality of output terminals to a plurality of external devices, the device 10a can be connected, for example, from an optical disc reproducing device to a monitor device and a recording device.

The communication control unit 12a exchanges authentication information and the like with the communication control unit 22 of each device 20. The communication control unit 12a is different from the communication control unit 12 of the above-described first embodiment in that it can individually communicate with each communication control unit 22.

In the communication system according to the third embodiment, transmission can be prohibited when a connection is made to copy a large amount of AV signals recorded on a recording medium. In the third embodiment, transmission can be prohibited for each output terminal by providing a transmission unit individually for each set output terminal.

FIG. 5 illustrates a communication system according to a third embodiment in a case where communication is performed by encrypting authentication information and the like. The device 10b and the device 20b are the same as the device 10 and the device 20 of the first embodiment described above and the encryption / decryption device 1
4 and 24 are different. Device 10b and device 20
Are connected via the composite cable 1.

The communication control unit 12 of the device 10b and the device 20b
The communication control unit 22 of the encryption / decryption unit 14,
The communication is performed via the H.24. Thus, the security of communication data when communicating authentication information and copyright information can be improved.

The encryption / decryption can also be performed by a microcomputer using software.

FIG. 6 illustrates a communication system according to a fourth embodiment in which authentication information and the like are communicated via a signal line of an AV signal. The device 10c and the device 20c
The difference is that the device 10 of the first embodiment described above, the device 20 and the modems 15 and 25 are provided. The device 10c and the device 20c are connected via the composite cable 1.

The communication control unit 12 of the device 10c and the device 20c
The communication control unit 22 performs communication via the modems 15 and 25, respectively. The modems 15 and 25 perform communication by superimposing on one of the signal lines of the AV signal, for example, the signal line of the R signal or the signal line for audio. Modems 15, 25
Requires modulation and demodulation in a frequency band that does not interfere with an AV signal or the like on which the signal is superimposed. For example, when superimposed on an audio signal, the intermediate frequency of AM radio, 45
It can be modulated at 5 kHz. As described above, if the above-described collective cable 1 is used by superimposing the authentication information or the like on the AV signal, for example, if the communication control units 12 and 22 cannot establish communication, the communication control unit 12 or 22 determines that the device is unauthorized and outputs the AV signal. Is prohibited, it is possible to reliably protect against unauthorized use.

FIG. 7 illustrates a communication system according to a fifth embodiment in which a YUV signal, which is an AV signal reproduced from a recording medium, is converted into a composite video signal and output. The device 30a includes a signal processing unit 31 that converts a YUV signal transmitted from the device 10 into a composite video signal, a communication control unit 32a that communicates copyright information and authentication information with the device 10, and superimposes the composite video signal. And a macro vision encoder 35 that generates a macro vision signal. The device 10 is the same as in the first embodiment described above. The device 10 and the device 30a are connected via the composite cable 1.

The composite video output from the device 30a is transmitted to the connected device via a general connector terminal. Therefore, the AV reproduced by the device 10
If the copyright information of the signal indicates that copying is prohibited or that only one generation can be copied, the communication control unit 32a
Controls the macro vision encoder 35 to superimpose the macro vision signal on the composite video signal. By incorporating a CGMS encoder in parallel with the macro vision encoder 36, it is possible to realize a generation limit for analog input of a digital device.

In the communication system according to the fifth embodiment, conversion with a conventional composite video signal is possible.

FIG. 8 illustrates a communication system according to a sixth embodiment in which an input composite video signal is converted into an AV signal output from a collective connector. The device 30b includes a signal processing unit 31 that converts an input composite video signal into an AV signal, and a communication control unit 32b that communicates copyright information and authentication information with the device 20.
And a macrovision / C for detecting a macrovision signal and a CGMS signal superimposed on the composite video signal
A GMS detector 36. The device 20 is the same as in the first embodiment described above. The device 20 and the device 30b are connected via the composite cable 1.

The composite video signal input to the device 30b is received via a general connector terminal.
The macrovision / CGMS detection unit 36 outputs the macrovision signal and CGM superimposed on the composite video signal.
The S signal is detected, and this detection information is supplied to the communication control unit 32b. Therefore, when the macro vision signal is superimposed on the composite video signal, the communication control unit 3
2b is treated as prohibiting recording as copyright information of the AV signal, and if the device 20 is in a recording state or the like, transmission is prohibited. If the CGMS signal is superimposed on the composite video signal, the generation information of the AV signal is supplied to the device 20 based on the information of the CGMS signal. Sixth such
In the communication system according to the embodiment, conversion with a conventional composite video signal is possible.

[0067]

According to the audio / video signal transmitting apparatus of the present invention, the audio / video signal to be transmitted is degraded by controlling the transmission of the audio / video signal based on the copyright information and the authentication information. In addition, illegal duplication can be prevented.

Also, in the audio / video signal receiving apparatus according to the present invention, the authentication information is supplied to the source of the audio / video signal to control the transmission of the audio / video signal, thereby receiving the audio / video signal. Can be prevented from being illegally copied without being deteriorated.

Further, the audio / video signal transmitting / receiving apparatus according to the present invention controls the transmission of the audio / video signal based on the copyright information of the received audio / video signal and the authentication information of the transmission destination. By supplying the authentication information to the source of the audio / video signal and controlling the transmission of the audio / video signal, it is possible to prevent unauthorized duplication without deteriorating the audio / video signal to be transmitted or received. Wear.

Further, in the audio / video signal transmitting apparatus according to the present invention, based on the copyright information and the authentication information,
By controlling the transmission of audio and video signals,
Unauthorized duplication can be prevented without deteriorating the audio / video signal to be transmitted.

In the method for transmitting an audio / video signal according to the present invention, based on the copyright information and the authentication information,
By controlling the transmission of audio and video signals,
Unauthorized duplication can be prevented without deteriorating the audio / video signal to be transmitted.

Further, in the audio / video signal receiving method according to the present invention, the authentication information is supplied to the source of the audio / video signal to control the transmission of the audio / video signal, so that the audio / video signal to be received is controlled. Can be prevented from being illegally copied without being deteriorated.

Further, in the audio / video signal transmission / reception method according to the present invention, the transmission of the audio / video signal is controlled based on the copyright information of the received audio / video signal and the authentication information of the transmission destination. By supplying the authentication information to the source of the audio / video signal and controlling the transmission of the audio / video signal, it is possible to prevent unauthorized duplication without deteriorating the audio / video signal to be transmitted or received. Wear.

Further, in the audio / video signal transmission method according to the present invention, based on the copyright information and the authentication information,
By controlling the transmission of audio and video signals,
Unauthorized duplication can be prevented without deteriorating the audio / video signal to be transmitted.

[Brief description of the drawings]

FIG. 1 is a block diagram of a communication system to which the present invention is applied.

FIG. 2 is a flowchart illustrating the contents of a communication process in a communication system to which the present invention has been applied.

FIG. 3 is a block diagram of a communication system to which the present invention is applied.

FIG. 4 is a block diagram of a communication system to which the present invention is applied.

FIG. 5 is a block diagram of a communication system to which the present invention is applied.

FIG. 6 is a block diagram of a communication system to which the present invention is applied.

FIG. 7 is a block diagram of a communication system to which the present invention is applied.

FIG. 8 is a block diagram of a communication system to which the present invention is applied.

[Explanation of symbols]

1 Composite cable, 10, 10a, 10b, 10c, 2
0, 20b, 30, 30a, 30b Equipment, 11, 12
1,31 signal processing unit, 12,22,32 communication control unit, 13,24 set output terminal, 23,33 set input terminal, 14,24 encryption / decryption unit, 15,25 modem

Claims (51)

[Claims] 1. A reproducing means for reproducing an audio / video signal and its copyright information, a transmitting means for transmitting the audio / video signal to an external device, and a communication means for communicating authentication information with the external device. An audio / video signal transmitting apparatus, comprising: signal control means for controlling an audio / video signal transmitted from the signal processing means to the external device based on the copyright information and the authentication information. 2. When the copyright information indicates that the reproduction of the audio / video signal to be reproduced is prohibited and the authentication information indicates that the external device is a recording device,
2. The audio / video signal as claimed in claim 1, wherein said signal control means inhibits transmission of an audio / video signal.
Transmitter for video signals. 3. When the copyright information indicates that the reproduction of the audio / video signal to be reproduced is prohibited and the authentication information indicates that the external device is in a recording state,
2. The audio / video signal as claimed in claim 1, wherein said signal control means inhibits transmission of an audio / video signal.
Transmitter for video signals. 4. The communication means periodically communicates authentication information with an external device, the copyright information indicates that duplication of an audio / video signal to be reproduced is indicated, and the external device is in a recording state. 4. The audio / video signal transmitting apparatus according to claim 3, wherein, when the authentication information indicates that, the signal control means prohibits transmission of the audio / video signal. 5. The audio / video signal transmitting apparatus according to claim 1, wherein the authentication information includes authentication information of a device further connected to the external device. 6. The audio / video signal transmitting apparatus according to claim 1, wherein the communication means communicates copyright information based on the audio / video signal together with the authentication information with an external device. 7. When the copyright information indicates that the audio / video signal to be reproduced can be copied for one generation, and the authentication information indicates that the external device is in a recording state, 7. The audio / video signal transmitting apparatus according to claim 6, wherein said communication means communicates copyright information indicating that duplication is prohibited to an external device. 8. The audio / video signal transmitting apparatus according to claim 1, wherein said communication means communicates the encrypted authentication information. 9. The audio / video signal transmitting apparatus according to claim 1, wherein the communication unit combines the authentication information with the audio / video signal and performs communication. 10. An audio / video signal output terminal and an authentication information communication end are provided with a collective connection terminal, wherein the collective connection terminal is configured to transmit an audio / video signal and transmit the authentication information. 2. The audio / video signal transmission device according to claim 1, wherein the transmission line is connected to a collective connector provided at an end of a composite cable in which communication lines for communication are collected. 11. The audio / audio transmitted from an external device.
Receiving means for receiving a video signal, signal processing means for performing signal processing on the audio / video signal, communication means for communicating authentication information with the external device, and signal processing content of the signal processing means, An audio / video signal receiving apparatus comprising: signal control means for controlling authentication information communicated by a communication means. 12. The signal control means has authentication information based on the processing content of the audio / video signal performed by the signal processing means, and the communication means communicates the authentication information with the external device. The audio / video of claim 11, wherein
Video signal receiving device. 13. The apparatus according to claim 12, wherein when the signal processing means is an audio / video signal recording means, the communication means communicates authentication information indicating that the communication means is a recording device. Audio / video signal receiving device. 14. The signal control means generates authentication information based on an operation state of the audio / video signal performed by the signal processing means, and the communication means communicates the authentication information with the external device based on the operation state. The audio / video signal receiving apparatus according to claim 11, wherein: 15. The apparatus according to claim 14, wherein when the signal processing unit is in a recording operation state, the communication unit communicates authentication information indicating that the signal processing unit is in a recording operation state with the external device. A receiving device for an audio / video signal according to claim 1. 16. The audio / video signal receiving apparatus according to claim 11, wherein said communication means periodically communicates authentication information with an external device. 17. The audio / video signal receiving apparatus according to claim 11, wherein said communication means communicates copyright information based on the transmitted audio / video signal with an external device. 18. When the signal processing means records an audio / video signal received from the external device, the audio / video signal and copyright information based on the audio / video signal are recorded. An audio / video signal receiving apparatus according to claim 17. 19. When the copyright information indicates that the received audio / video signal can be copied for one generation, it indicates that the audio / video signal is copy-prohibited together with the audio / video signal. 19. The audio / video signal receiving apparatus according to claim 18, wherein copyright information is recorded. 20. The audio / video signal receiving apparatus according to claim 11, wherein said communication means communicates the encrypted authentication information. 21. The audio / video signal receiving apparatus according to claim 11, wherein the communication unit combines the authentication information with an audio / video signal and performs communication. 22. An audio / video signal input terminal and an authentication information communication end are provided with a collective connection terminal, wherein the collective connection terminal is provided with a transmission line through which an audio / video signal is transmitted and a authentication information. 12. The audio / video signal receiving apparatus according to claim 11, wherein the receiving apparatus is connected to a collective connector provided at an end of a composite cable in which communication lines for performing the above-mentioned communication are collected. 23. A receiving means for receiving an audio / video signal transmitted from a first external device, a signal processing means for performing signal processing on the received audio / video signal, and a signal processing by the signal processing means. Audio
Transmitting means for transmitting a video signal to a second external device; communicating copyright information of the audio / video signal transmitted to the first external device; and communicating authentication information to the second external device. Communication means, and an audio signal comprising signal control means for controlling an audio / video signal transmitted from the signal processing means to the external device based on the copyright information, the authentication information, and the signal processing content of the signal processing means. Video signal transmission / reception device. 24. If the copyright information indicates that duplication of the received audio / video signal is prohibited and the authentication information indicates that the second external device is a recording device, The audio / video signal transmitting / receiving apparatus according to claim 23, wherein the signal control means prohibits transmission of the audio / video signal. 25. If the copyright information indicates that copying of the received audio / video signal is prohibited and the authentication information indicates that the second external device is in a recording state, The audio / video signal transmitting / receiving apparatus according to claim 23, wherein the signal control means prohibits transmission of the audio / video signal. 26. The communication means periodically communicates copyright information and authentication information. The copyright information indicates that duplication of an audio / video signal to be received is indicated in the copyright information. 24. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein when the authentication information indicates that the apparatus is in a recording state, the signal control unit prohibits transmission of the audio / video signal. 27. The signal processing means is in a recording state,
If the copyright information indicates that the received audio / video signal can be copied for one generation, and the authentication information indicates that the second external device is in a recording state, 28. The audio / video signal transmitting / receiving apparatus according to claim 26, wherein the signal control unit inhibits transmission of the audio / video signal. 28. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein said communication means communicates the copyright information based on the audio / video signal together with the authentication information to a second external device. . 29. The copyright information indicates that the signal processing means is not in a recording state, and that the received audio / video signal can be duplicated for one generation.
29. The apparatus according to claim 28, wherein when the authentication information indicates that the external device is in a recording state, the communication means communicates copyright information indicating that copying is prohibited to the external device. Audio / video signal transmission / reception device. 30. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein said communication means communicates the encrypted authentication information. 31. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein the communication unit combines the authentication information and the copyright information into an audio / video signal and performs communication. 32. A first collective connection terminal in which an input end of an audio / video signal, a communication end for communicating copyright information with a first external device, and an output end of the audio / video signal. A second collective connection terminal in which a communication terminal for communicating authentication information with the second external device is provided. The first and second collective connection terminals are provided with a transmission line for transmitting an audio / video signal, 3. A connection connector provided at an end of a composite cable in which communication lines for communicating authentication information and copyright information are collected.
4. An audio / video signal transmitting / receiving device according to claim 3. 33. The audio / video signal to be transmitted to the second external device is a composite video signal, a macro vision encoder for superimposing a macro vision signal on the composite signal is provided, and duplication of the received audio / video signal is prohibited. 24. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein when the copyright information is indicated in the copyright information, a macrovision signal is superimposed on the composite video signal and transmitted. 34. An audio / video signal transmitted from a first external device is a composite video signal, comprising: a macrovision signal detecting means for detecting a macrovision signal from the composite video signal; Detects the macrovision signal, the signal control means controls the audio / video signal transmitted from the signal processing means to the external device based on the detection signal, the authentication information and the signal processing content of the signal processing means. 24. The audio / video signal transmitting / receiving apparatus according to claim 23, wherein: 35. A reproducing unit for reproducing an audio / video signal and its copyright information, a transmitting unit for transmitting the audio / video signal, a first communication unit for communicating authentication information, and the copyright Signal transmitting means for controlling an audio / video signal transmitted from the transmitting section based on information and the authentication information; and receiving for receiving the audio / video signal transmitted from the signal transmitting means. Unit, a signal processing unit for performing signal processing of the audio / video signal, a second communication unit for communicating authentication information with the first communication unit, and the second communication unit based on the signal processing content of the signal processing unit. And a second signal control unit that controls authentication information communicated by the second communication unit. 36. When the copyright information indicates that duplication of an audio / video signal to be reproduced is indicated in the copyright information and the authentication information indicates that the signal processing unit is in a recording state, the first information processing unit may execute the first method. 36. The audio / video signal transmission apparatus according to claim 35, wherein the signal control unit inhibits transmission of the audio / video signal from the signal transmission unit to the signal reception unit. 37. When the copyright information indicates that the audio / video signal to be reproduced can be copied for one generation, the transmitting unit transmits the audio / video signal and the first communication unit transmits the audio / video signal. The copy prohibition copyright information is communicated to the second communication unit, and the second signal control means records the audio / video signal and the copyright information indicating that the audio / video signal is copy prohibition. The apparatus for transmitting an audio / video signal according to claim 35. 38. A composite cable in which a transmission line for transmitting an audio / video signal having an aggregated connector provided at an end thereof and a communication line for communicating authentication information are assembled. A first collective connection terminal in which an output end of the video signal and a communication end of the authentication information are gathered; and the signal receiving means is configured such that the input end of the audio / video signal and the communication end of the authentication information are gathered. A first collective connection terminal, wherein the collective connector of the composite cable is connected to the first collective connection terminal and the first collective connection terminal, and the signal transmitting means and the signal receiving means 37. The audio / video signal transmission apparatus according to claim 35, wherein the transmission of the signal is performed. 39. Reproducing an audio / video signal and its copyright information, acquiring authentication information, and controlling transmission of the reproduced audio / video signal based on the copyright information and the authentication information. Audio / video signal transmission method. 40. When the copyright information indicates that the reproduction of the audio / video signal to be reproduced is to be prohibited and the authentication information indicates that the audio / video signal to be transmitted is to be recorded, the reproduced audio / video signal The method for transmitting an audio / video signal according to claim 39, wherein transmission of the video signal is prohibited. 41. The copyright information indicates that the audio / video signal to be reproduced can be duplicated for one generation,
If the authentication information indicates that the audio / video signal to be transmitted is to be recorded, the reproduced audio / video
The method for transmitting an audio / video signal according to claim 39, further comprising transmitting a transmission of the video signal and transmitting copyright information indicating that the transmitted audio / video signal is prohibited from being reproduced. 42. Receiving an audio / video signal, performing signal processing on the received audio / video signal, and transmitting authentication information to a source of the audio / video signal based on the content of the signal processing on the received audio / video signal. A method for receiving an audio / video signal. 43. An apparatus according to claim 42, wherein when the content of the signal processing of the received audio / video signal is a recording processing, authentication information indicating the recording processing is supplied to a source of the audio / video signal. The receiving method of the audio / video signal described in the above. 44. Receiving the copyright information of the audio / video signal, and if the copyright information indicates that one-generation duplication is possible, the prohibited audio / video signal is recorded and 43. The audio / video signal receiving method according to claim 42, wherein said copyright information is also recorded. 45. An audio / video signal is received, copyright information of the audio / video signal is received, signal processing of the received audio / video signal is performed, authentication information is obtained, and the copyright information, An audio / video signal transmission / reception method, comprising: controlling transmission of an audio / video signal subjected to signal processing based on authentication information and signal processing content. 46. If the copyright information indicates that copying of the received audio / video signal is prohibited and the authentication information indicates that the audio / video signal to be transmitted is to be recorded, the audio / video signal The method for transmitting / receiving an audio / video signal according to claim 45, wherein signal transmission is prohibited. 47. Recording the received audio / video signal, and the copyright information indicates that the received audio / video signal can be duplicated for one generation, and records the transmitted audio / video signal. 47. The audio / video signal transmission / reception method according to claim 45, wherein when the authentication information indicates that the transmission is performed, transmission of the audio / video signal is prohibited. 48. The copyright information indicates that the content of the signal processing of the received audio / video signal is not the recording processing, but that the received audio / video signal can be duplicated for one generation. -If recording the video signal is indicated in the above authentication information,
46. The audio / video signal transmission / reception method according to claim 45, further comprising transmitting the audio / video signal and transmitting copyright information indicating that the transmitted audio / video signal is prohibited from being reproduced. 49. A transmission method of an audio / video signal for transmitting a reproduced audio / video signal and receiving the transmitted audio / video signal, wherein the transmission side includes the audio / video signal and its copyright information. , And transmits the reproduced audio / video signal. The receiving side receives the transmitted audio / video signal,
Performs signal processing of the received audio / video signal, and supplies authentication information to the audio / video signal transmitting side based on the content of the received audio / video signal processing, and the transmitting side acquires the authentication information, A transmission method of an audio / video signal, comprising controlling transmission of a reproduced audio / video signal based on the copyright information and the authentication information. 50. When the transmission side indicates in the copyright information that duplication of the audio / video signal to be reproduced is indicated in the copyright information and the content of the signal processing of the received audio / video signal is recording processing, 50. The audio / video signal transmission method according to claim 49, wherein transmission of the video signal is prohibited. 51. A case where the copyright information indicates that the audio / video signal to be reproduced can be reproduced for one generation by the transmitting side, and the content of the signal processing of the received audio / video signal is a recording processing. 50. The method according to claim 49, further comprising transmitting an audio / video signal, transmitting copyright information of one generation duplication possible, and recording the copyright information of one generation duplication together with the audio / video signal. A method for transmitting audio and video signals.