JP2002074827A - Copy control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a conventional copy control has been performed using a source as it is, therefore, it has been impossible to permit copying after having deteriorated quality to some extent. SOLUTION: In a disk player 10 of a transmitter side, a sound quality restriction means 12 processes a program SRC so that the program satisfies copy permission conditions based on copy condition information, to generate program information CDQ for transmission, and transmits copy control information CCI corresponding to the copy condition information CQ to a disk recorder 20 of a receiver side together with the program information CDQ for transmission. Moreover, recording may be carried out after the copy control information CCI and the copy condition information including the program SRC have been transmitted to the receiver and the program has been processed at the receiver side according to the copy condition information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling copying of audio and video programs, and more particularly to a method for creating a copy on a receiving recorder after transmitting a program expressed in digital form through a digital interface. It relates to a copy control method.

[0002]

2. Description of the Related Art There are several proposals for copy control of a video program or an audio program recorded in a digital format, and actual operation is performed by setting rules. For example, for audio programs, a serial copy management system
SCMS) is operated to control whether or not to copy an audio program from a CD (compact disc) to an MD (mini disc). For video signals, a copy generation management system (hereinafter abbreviated as CGMS) is operated.
Both can be copied indefinitely, one generation copy is possible,
Alternatively, copy control information (hereinafter abbreviated as CCI) for identifying any of the three types of copy prohibition is transmitted via a digital interface together with a digital program, and copy control is performed on the receiving side based on the CCI. Things.

In both SCMS and CGMS, 1
When the CCI indicating generation copy is transmitted, information indicating further copy prohibition is recorded together with the program on a recording medium (for example, MD). When the copied program is reproduced and transmitted again, the CCI indicating copy prohibition is added and transmitted. Therefore, the recorder on the receiving side does not copy as a result of determining the CCI.

[0004] As a simple conventional example, FIG.
Audio program from IEC to MD (Internatio
(National Electrotechnical Commission) 60958 standard digital audio interface. In FIG. 5, the CD player 100 includes:
CD disk (not shown) by CD drive 101
And reproduces the audio signal SRC from the CD, and at the same time, reads out the copy control information CCI from the CD disk. To output to the digital interface 400, the modulating means 102 converts the audio signal SRC to IEC60958.
Format and copy control information CCI to IEC
Embed in a 60958 format signal.

[0005] The recorder 200 demodulates the audio signal of the IEC60958 format transmitted via the digital interface 400 by the demodulator 201, transmits the audio signal portion SRC-R to the MD drive 202, and embeds it on the transmission side. The copy control information CCI-R obtained by reproducing the obtained CCI is transmitted to the MD drive 202. The MD drive 202 determines the meaning of CCI-R, and performs recording of SRC-R if recording is possible.

[0006]

In the above conventional example, C
There is no problem for the purpose of transmitting and copying the audio program recorded in D as it is. However, DVD
(Digital Versatile Disc) For ultra-high-quality audio media such as audio, which has been proposed in recent years,
The conventional technique cannot cope with the copy control, since the copy control is performed after deteriorating the quality to some extent instead of simply recording the original signal as the copy control.

[0007]

In order to solve the above-mentioned problems, a copy control method according to the present invention comprises:
A method of transmitting program information and its copy control information to restrict copying of a program on a receiving side, wherein the copy control information indicates a degree of copy permission of a program to be transmitted, and the copy control information indicates a degree of copy permission of the program. Prepare copy condition information indicating copy permission conditions, and on the transmission side, generate a transmission program information by processing a program based on the copy condition information so that the copy permission conditions are satisfied. The corresponding copy control information is transmitted together with the transmission program information.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first aspect of the present invention is to prepare copy control information of a program to be transmitted and copy condition information representing copy permission conditions according to the degree of copy permission of the program, and transmit Processing the program so as to satisfy the copy permission condition based on the copy condition information to generate transmission program information; and receiving copy control information corresponding to the copy condition information together with the transmission program information. To the side. On the transmitting side, when transmitting a program as a transmission program in a state where the copy permission condition is not satisfied, copy control information having a stronger restriction than the copy control information corresponding to the copy condition information is transmitted to the transmission program. The information is transmitted to the receiving side.

According to a second aspect of the present invention, copy control information indicating a copy permission level of a program to be transmitted and copy condition information indicating a copy permission condition corresponding to the copy permission level of the program are prepared. A program in a state where the copy conditions are not satisfied is transmitted as a first transmission program by adding the first copy control information which is more restrictive than the copy control information corresponding to the copy condition information and simultaneously transmitting the copy condition information. And processing the program so that the copy permission condition is satisfied.
Is generated, and the second copy control information corresponding to the copy condition information is added and transmitted.

In a third aspect of the present invention, copy control information indicating a degree of copy permission of a program to be transmitted and copy condition information indicating a copy permission condition corresponding to the degree of copy permission of the program are prepared. Generating transmission program information in a state in which the processing of the program based on the copy condition information is not performed, and more strongly controlling copy control information together with the transmission program than copy control information corresponding to the copy condition information. The copy condition information is transmitted at the same time, and the receiving side generates the recording program information by processing the program based on the copy condition information so that the copy permission condition is satisfied. Copying the recording program according to copy control information corresponding to the copy condition information. To.

According to a fourth aspect of the present invention, copy control information indicating a copy permission level of a program to be transmitted and copy condition information indicating a copy permission condition corresponding to the copy permission level of the program are prepared. Generating first transmission program information in a state where the processing of the program based on the copy condition information is not performed, and the first copy control information having a stronger restriction than the copy control information corresponding to the copy condition information Together with the first transmission program, and further transmits the copy condition information at the same time. On the receiving side, the first copy program satisfies the copy permission condition based on the copy condition information. The transmission program is processed to generate second transmission program information, and copy control information corresponding to the copy condition information is transmitted to the second transmission program information. So as to transmit with transmission program.

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

(First Embodiment) FIG. 1 is a block diagram showing a configuration example for realizing a copy control method according to a first embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a disc player. A disc reproducing means 11 provided in the disc player 10 reads an audio program from an optical disc (not shown) and outputs it as an audio signal SRC.
At the same time, copy condition information CQ indicating the sound quality of a program that enables copying is also read out from the optical disc and output. Table 1 shows the relationship between the copy control information CCI and the copy condition information CQ.

[0015]

[Table 1]

For example, when CCI = 11 is specified,
All copying is prohibited regardless of the value of CQ. Also,
Conversely, when CCI = 00, free copying is permitted regardless of the CQ. When CCI = 10 and one generation copy is permitted, the program to copy is CQ
After processing from the original audio signal SRC up to the quality specified by, one-generation copy is possible.

In Table 1, if CCI = 10 and CQ =
Assuming the case of 10, circles are entered. In this case, the original audio program has, for example, 6 channels, and even if the sampling frequency of each channel is high sound quality of 96 kHz, the number of channels of the program to be copied is 6 channels or less, and the sound quality of each channel is CD. Level or below, that is, the sampling frequency is 4
It must be reduced to below 8 kHz.

In the example of (Table 1), the copy condition information CQ
However, since the instruction is issued to reduce the sound quality to the CD quality without changing the number of channels, the sound quality limiting unit 12 converts the signal of each channel of the audio signal SRC read out by the disk reproducing unit 11 according to the copy condition information CQ. CD
The sound quality is limited to the level and output as an audio signal CDQ. The sound quality limiting means 12 has a function of downsampling the audio signal of each channel of the audio program, lowering the sampling frequency and limiting the frequency band, thereby lowering the sound quality to about CD, and a multi-channel of the input audio program. It has a function of downmixing a signal to two channels, and how to use these functions is determined by copy condition information CQ. Since the downsampling function and the downmix function can be easily realized by those skilled in the art,
Description is omitted.

The formatting means 13 adds CCI to the audio signal CDQ. The modulation means 14 converts the audio signal CDQ into a signal for transmission. As a signal for transmission, for example, IEEE 1394 (The Institute of Ele
ctrical and Electronics Engineers, Inc.) An interface bus can be used. IEEE 1394
Various methods have been proposed as a transmission protocol of the Internet, one of which is called an AV protocol. The AV protocol is standardized as IEC61883, and defines a method of transmitting and receiving AV data requiring real-time characteristics by isochronous communication, a method of transmitting and receiving an instruction given to a device by asynchronous communication, and the like.

When transmitting and receiving data by isochronous communication, a transmission and reception system is defined for each data format such as video data and audio data. For example, C
The transmission and reception of audio data such as D is based on the Audio and Music Data Transmission Prot determined by the 1394 Trade Association (hereinafter referred to as 1394TA).
The transmission method is shown in ocol Rev 1.0 (hereinafter, referred to as AM protocol). In the AM protocol, an audio signal and its accompanying data can be transmitted simultaneously. In this embodiment, the transmission of the audio signal CDQ and the added CCI are output to the digital interface bus 300 using the AM protocol.

The disk recorder 20 is an IEEE 139
A demodulation unit 21 for demodulating signals of four formats and a disk recording unit 22 are provided. The demodulation means 21 uses the IEEE 139
4 by restoring the audio signals CDQ and CCI transmitted via the interface bus 300, respectively.
R and CCI-R are obtained and transmitted to the disk recording means 22. The CCI-R has the same contents as the CCI read from the disk reproducing unit 11, and instructs the disk recording unit 22 to perform copy control of the contents described in (Table 1). The disk recording means 22 reads the C
Controls recording of DQ-R on the disc. That is, CC
When IR = 11, the received music signal CDQ-R is not recorded, and CCI-R = 10 or CCI-R =
In the case of 00, the CDQ-R is recorded on the disc. The disc recording means 22 is not particularly limited, and an MD (mini disc), a DVD-RAM, or the like can be used. At this time, together with the recording of the CDQ-R, the CCI
-R also updates its contents and is recorded on the disc.
If CCI-R = 10, further recording is prohibited, so that CCI = 11 is recorded on the disc, and if CCI-R = 00, indicating free copy, CCI = 00 is recorded.

In this manner, an audio program that can be copied for one generation is transmitted from the disk player 10 after being subjected to sound quality restriction according to the copy condition information CQ, and can be recorded by the disk recorder 20 and can be recorded for two or more generations. Can be blocked.

If the receiving side is not a recording device such as the disk recorder 20 but a reproduction-only device such as an audio amplifier, the CC read from the disk reproducing means 11 is used.
Irrespective of I, sound quality limiting means 1 of audio signal SRC
2, the quality of the CDQ remains as it is in the SRC, and is sent to the formatting means 13. In this case, since the copy condition information CQ is not satisfied, the format unit 13 adds CCI = 11 to the CCI attached to the audio program CDQ. That is, since the high-quality audio program is transmitted to the interface bus 300 together with the copy control information indicating copy prohibition, the high-quality audio program can be reproduced by the reproducing device, but cannot be recorded by the recording device.
Appropriate recording control is achieved.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described. FIG. 2 is a block diagram showing a configuration example for realizing the copy control method according to the second embodiment of the present invention.

In FIG. 2, reference numeral 30 denotes a disc player. The disc reproducing means 31 and the sound quality restricting means 32 of the disc player 30 are the same as the disc reproducing means 11 and the sound quality restricting means 12, respectively, in FIG. Formatting means 3
3 and 34 have the same operation as the formatting means 13 in FIG. 1, but the formatting means 34 always inputs the high-quality audio signal SRC read out from the disc reproducing means 31, and the CCI means that copying is prohibited. CCI = 11 is added. Formatting means 3
3 is a sound quality limiting means 32 according to the copy condition information CQ.
The audio signal CDQ output after processing the sound quality is input, and copy control information CCI is added to the audio signal CDQ and output. The modulating means 35 multiplexes two audio signals with copy control information output from the formatting means 33 and 34, modulates the multiplexed audio signals into an IEEE 1394 standard AM protocol format, and outputs the modulated signals to the IEEE 1394 interface bus 300.

The disk recorder 40 is the same as the disk recorder 20 shown in FIG. 1, and includes a demodulation unit 41 for demodulating an IEEE 1394 format signal and a disk recording unit 22. The demodulation means 41 is the same as the demodulation means 21 of FIG. 1, and the disc recording means 42 is the disc recording means 2 of FIG.
Same as 2. Therefore, the disk recorder 40 shown in FIG.
Also, the audio signal transmitted via the IEEE 1394 interface bus 300 is copied or not according to the content of the copy control information CCI-R. When copying, the CCI is the same as in FIG.
The copy control information indicated by -R is updated, and CCI indicating copy prohibition is recorded for the one-generation copy permitted.

As described above, the disc recorder 40 uses the demodulation means 41 to demodulate the two types of audio signals transmitted through the IEEE 1394 interface bus 300, that is, the high-quality audio signal SRC and the processed audio. It is possible to receive and record an audio signal CDQ of which recording is permitted among the signals CDQ.

The playback device 50 converts an audio signal transmitted via IEEE 1394 into an analog signal,
The sound is emitted into the air after electrical amplification. 51 is
This is a demodulation unit similar to the demodulation unit 41, and is an IEEE 139
The audio signal transmitted through the four interface bus 300 is demodulated and transmitted to the audio reproducing means 52. The audio reproducing means 52 includes a DA converter, an analog amplifier, and a speaker, and converts an input digital audio signal into a sound wave.

Since the reproducing apparatus 50 has no means for recording, as described above, the reproducing apparatus 50 is multiplexed by a disc player and the IEEE 1394 interface bus 3
Among the two types of audio signals transmitted at 00, that is, the high-quality audio signal SRC and the high-quality processed audio signal CDQ, the high-quality audio signal SRC to which recording is not permitted can be received and reproduced. .

In the second embodiment, the IEEE 1
For example, a high-quality audio signal having a multi-channel and a sampling frequency of 96 kHz is transmitted to the 394 interface by designating copy prohibition, and the audio signal is processed and transmitted to a quality that allows simultaneous copying. Therefore, it is possible to listen in high sound quality, and at the same time, to copy by a recorder.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration example for realizing the copy control method according to the third embodiment of the present invention.

In FIG. 3, reference numeral 60 denotes a disc player. The disc reproducing means 61 of the disc player 60 is the same as the disc reproducing means 11 in FIG.

The operation of the formatting means 62 is the same as that of the formatting means 13 in FIG. 1, except that the formatting means 62 always receives a high-quality audio signal SRC read out from the disk reproducing means 61, and the CCI is always CC
I = 11 is added, and copy condition information CQ is also added, and output to the modulating means 63. The modulating means 63 is equivalent to the modulating means 14 in FIG.
The audio signal to which I and the copy condition information CQ are added is modulated into an IEEE 1394 standard AM protocol format,
Output to the IEEE 1394 interface bus 300.

Reference numeral 70 denotes a disk recorder, which is an IEEE standard.
It comprises a demodulating means 71 for demodulating a 1394 format signal, a sound quality limiting means 72 and a disk recording means 73. The demodulation unit 71 restores the audio signal SRC, copy control information CCI, and copy condition information CQ sent via the IEEE 1394 interface bus 300, and obtains SRC-R, CCI-R, and CQ-R, respectively. The sound quality limiting means 72 receives the high-quality audio signal SRC-R output from the demodulating means 71 and the copy condition information CQ-R as inputs, and performs sound quality restriction specified by CQ-R on the SRC-R. Audio signal CD with restriction
Q is output to the disk recording means 73. The disc recording unit 73 stores the copy control information CC output from the demodulation unit 71.
If the IR is one-generation copyable or free to copy, the copy control information is updated and recorded together with the input audio signal CDQ. If copying is prohibited, no recording is performed.

The reproducing apparatus 80 is the reproducing apparatus 50 shown in FIG.
And the description of the configuration and operation is omitted,
The audio signal transmitted via EEE1394 is converted into an analog signal, subjected to an electric amplification process, and emitted into the air.

In the present embodiment configured as described above, the two types of audio signal transmission required in the second embodiment may be transmission of only high-quality audio signals.
The transmission side system can be simplified.

(Embodiment 4) Next, Embodiment 4 of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing a configuration example for realizing the copy control method according to the present embodiment.

Referring to FIG. 4, the disc player 60
This is the same as the disc player 60 in FIG. 3, and the description is omitted. 90 is an IEEE1394 interface 30
A processing device (hereinafter, processor) that processes a signal input from 0 according to copy control information and copy condition information and outputs the processed signal to the IEEE 1394 interface 400.

The demodulation means 91 provided in the processor 90
Is the same as the demodulation means 71 in FIG.
The audio signal transmitted via the 1394 interface 300 and the copy control information and the copy condition information transmitted therewith are demodulated, and the audio signal SRC-R, the copy control information CCI-R and the copy condition information are respectively demodulated. Obtain CQ-R. Sound quality limiting means 92
3 is the same as the sound quality limiting means 72 in FIG. 3, and converts the input audio signal SRC-R into copy condition information CQ.
Audio signal CD by limiting the sound quality specified by -R.
Output as Q. The format unit 93 adds the copy control information CCI-R obtained by demodulation by the demodulation unit 91 to the input audio signal and outputs it. At this time, the disc recorder 70 in FIG. 3 updates the CCI-R and records it on the disc. However, the formatting means 93 of the processor 90 adds the CCI-R to the audio signal without updating the CCI-R. The modulating means 94 is equivalent to the modulating means 14 in FIG. 1, and converts the audio signal to which the copy control information and the copy condition information are added according to the IEEE.
Modulated to the E1394 standard AM protocol format, IEEE
Output to the E1394 interface bus 400.

In the present embodiment configured as above, as described in the second embodiment, even if the recorder does not have the sound quality limiting means, the sound quality is limited by the processor 90. Can be copied using the output.

In the embodiment of the present invention, the downsampling and downmix functions are mentioned as the functions provided by the sound quality limiting means. However, for example, the band may be limited or a part of the program may be deleted. , All means of processing the quality of the program are available,
Needless to say.

Also, in Table 1, the case where one combination of CCI and CQ is selected, and other than that, for example, if no processing is performed, processing is performed with CCI = 11, for example, (CQ = 11, CCI = 11) = 11), (CQ = 1
0, CCI = 10) and (CQ = 01, CCI = 00) may be explicitly used in combination of a plurality of types, that is, all three types.

In the embodiment, the copy control information C
As described above, the CI and the copy condition information are transmitted or embedded together with the copy-protected program.
The program and the corresponding copy control information CCI and copy condition information CQ may be transmitted separately, or may be associated independently. For example, the handling of the copy control information may be changed in association with the billing process, or the copy condition information may be modified or added again.

[0044]

As described above, according to the present invention, copy control information indicating the degree of copy permission of a program to be transmitted and copy condition information indicating copy permission conditions according to the degree of copy permission of the program are prepared. , On the sending side,
Based on the copy condition information, the program is processed to generate transmission program information so that the copy permission condition is satisfied, and copy control information corresponding to the copy condition information is
Since the program is transmitted together with the transmission program information to the receiving side, for example, copying of a multi-channel high-quality audio program is prohibited, but copying of a 2-channel processed sound program up to a CD quality can be permitted. Thus, a new degree of freedom can be provided for copy control.

Further, copy control information indicating the degree of copy permission of the program to be transmitted and copy condition information indicating the copy permission condition according to the degree of copy permission of the program are prepared, and a state in which the copy condition is not satisfied on the transmission side is prepared. Is transmitted as a first transmission program with the first copy control information having a stronger restriction than the copy control information corresponding to the copy condition information, and at the same time, the copy permission condition is determined based on the copy condition information. The program is processed so as to satisfy the condition, the second transmission program information is generated, and the second copy control information corresponding to the copy condition information is added and transmitted. In this case, you can listen to the original high-quality sound, and when copying, you can record with the permitted quality. Both also freely selection can be carried out.

Also, copy control information indicating the degree of copy permission of the program to be transmitted and copy condition information indicating copy permission conditions according to the degree of copy permission of the program are prepared, and the transmission side prepares a program based on the copy condition information. The transmission program information is generated in a state where the processing is not performed, and the copy control information that is more restrictive than the copy control information corresponding to the copy condition information is transmitted together with the transmission program, and the copy condition information is transmitted at the same time. On the receiving side, on the basis of the copy condition information, the program is processed so that the copy permission condition is satisfied, the recording program information is generated, and the recording program is generated in accordance with the copy control information corresponding to the copy condition information. The sender prepares two types of audio signals. It is not necessary, it is sufficient to output only the original high-quality audio program, Instrumented is simplified.

Further, copy control information indicating the degree of copy permission of the program to be transmitted and copy condition information indicating copy permission conditions according to the degree of copy permission of the program are prepared, and the transmission side prepares a program based on the copy condition information. The first transmission program information is generated in a state in which the first copy control information is not processed, and the first copy control information, which is more restrictive than the copy control information corresponding to the copy condition information, is generated.
And further transmits the copy condition information at the same time. On the receiving side, the first transmission program is processed based on the copy condition information so that the copy permission condition is satisfied. To generate the second transmission program information, and to transmit the copy control information corresponding to the copy condition information together with the second transmission program. Even if you do not have
The sound quality can be appropriately limited by a processor having a sound quality limiting function in the middle.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example for explaining a copy control method according to a first embodiment of the present invention;

FIG. 2 is a block diagram showing a configuration example for explaining a copy control method according to the second embodiment;

FIG. 3 is a block diagram showing a configuration example for explaining a copy control method according to the third embodiment;

FIG. 4 is a block diagram showing a configuration example for explaining a copy control method according to the fourth embodiment;

FIG. 5 is a block diagram showing a configuration example for explaining a conventional copy control method;

[Explanation of symbols]

 11, 31, 61 Disc playback means 12, 32, 72, 92 Sound quality restriction means 13, 33, 34, 62, 93 Formatting means 14, 35, 63, 94 Modulation circuit 21, 41, 51, 71, 81, 91 Demodulation Means 22, 42, 73 Disc recording means 52, 82 Audio playback means

Claims (15)

[Claims] 1. A method for restricting copying of a program on a receiving side by transmitting program information and copy control information of the program information from a transmitting side to a receiving side. Copy control information indicating the degree of copy and copy condition information indicating a copy permission condition corresponding to the degree of copy permission of the program are prepared. On the transmission side, the copy permission condition is satisfied based on the copy condition information. A copy control method for generating transmission program information by processing the program, and transmitting copy control information corresponding to the copy condition information to a receiving side together with the transmission program information. 2. The copy control method according to claim 1, wherein the copy condition information is a deterioration of program quality. 3. When the transmission side transmits a program as a transmission program in a state where the copy permission condition is not satisfied, copy control information having a stronger restriction than copy control information corresponding to the copy condition information is transmitted. 2. The copy control method according to claim 1, wherein the copy control information is transmitted to a receiving side together with the transmission program information. 4. The copy control method according to claim 3, wherein the more restrictive copy control information is copy prohibition. 5. A method for transmitting program information and copy control information of the program information from a transmitting side to a receiving side to restrict copying of the program on the receiving side, the method comprising: And copy condition information indicating a copy permission condition corresponding to a copy permission degree of the program, and a program in a state where the copy condition is not satisfied is defined as a first transmission program on the transmission side. The first, which is more restrictive than the copy control information corresponding to the copy condition information
At the same time as adding and transmitting the copy control information, the program is processed based on the copy condition information so that the copy permission condition is satisfied, and second transmission program information is generated. A copy control method characterized by adding second copy control information corresponding to (1) and transmitting the same. 6. A method for transmitting a program information and copy control information of the program information from a transmitting side to a receiving side to restrict copying of the program on the receiving side, the method comprising: And copy condition information indicating copy permission conditions corresponding to the degree of copy permission of the program, and the transmission side prepares the copy control information based on the copy condition information for transmission without processing the program based on the copy condition information. Generating program information, transmitting copy control information having a stronger restriction than the copy control information corresponding to the copy condition information together with the transmission program, and further transmitting the copy condition information simultaneously, The program, so that the copy permission condition is satisfied based on the copy condition information. Copy control method characterized in that processing to generate the recording program information, copying of the recorded program in accordance with the copy control information corresponding to the copy condition information. 7. The copy control method according to claim 6, wherein the copy condition information is deterioration of program quality. 8. The copy control method according to claim 6, wherein the more restrictive copy control information is copy prohibition. 9. A method for transmitting program information and copy control information of the program information from a transmitting side to a receiving side to restrict copying of the program on the receiving side, the method comprising: , And copy condition information indicating copy permission conditions according to the degree of copy permission of the program, and the first side is prepared on the transmission side without processing the program based on the copy condition information. And transmitting the first copy control information, which is more restrictive than the copy control information corresponding to the copy condition information, together with the first transmission program, and further transmitting the copy condition information. At the same time, on the receiving side, the copy permission condition is satisfied based on the copy condition information. Processing the first transmission program to generate second transmission program information, and transmitting copy control information corresponding to the copy condition information together with the second transmission program. Control method. 10. A method for transmitting a program, comprising adding, to a program to be transmitted, copy condition information indicating a copy permission condition of the program. 11. The program transmission method according to claim 10, wherein the copy permission condition is a program value reduction method. 12. A recorder characterized by processing a program according to a copy permission condition added to the received program and recording the processed program on a recording medium. 13. The recorder according to claim 12, wherein the processing is a method of reducing the value of the program. 14. A processing apparatus for processing a program according to a copy permission condition added to the received program, adding copy control information indicating that copying is possible to the received program, and transmitting the program again. 15. The processing apparatus according to claim 14, wherein the processing is a program value reduction method.