JP2000182321A - Method and system for information signal duplication managing, information signal outputting device and device and medium for information signal recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the convenience of the user of an information signal from being damaged, and to appropriately protect the right of the copyright holder of the information signal. SOLUTION: Contents ID, SCMS(serial copy management system) information as copy generation management information, and the allowable number of times of copy as the number of times of copy management information is added to a voice signal to be supplied as additional information, and detected by each part of an additional information detecting part 38, and supplied to a control part 50. The control part 50 manages copy history information constituted of the contents ID and the allowable number of times of copy of the voice signal to be copied by a copy history information management memory 52, and operates the copy control of the voice signal based on the copy history information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an information signal duplication management method for managing duplication of various information signals such as audio signals and video signals, an information signal duplication management system using this method, The present invention relates to an information signal output device, an information signal recording device, and an information signal recording medium used in this system.

[0002]

2. Description of the Related Art In recent years, with the spread of digital contents such as the Internet, compact discs (CDs), and digital video discs (DVDs), copyright infringement due to illegal duplication of these digital contents has become a problem. I have. In order to cope with this problem, it has been considered to add information for copy control to digital contents, and to prevent illegal duplication using the additional information.

[0003] The control for preventing the duplication includes a case where the duplication is not permitted at all according to the information source and a case where the duplication is permitted once but the duplication from the one-time duplication is prohibited ( Generation control). The former is the case of original software created and sold by a content maker, such as a DVD-ROM. The latter generation-limited copy control method is applied to, for example, broadcast information in broadcast media.

[0004] In the latter case of the copy control system with generation limitation, a system capable of effectively controlling the copy generation is desired. As a method of the copy control information capable of managing the copy generation, SCMS (Serial) for audio signals is used.
Copy Management System (Copy Management) system, CGMS (Copy Gene
ratio Management System)
A method has been proposed.

In the SCMS system, a copy prohibition / permission flag to be transmitted together with a digital audio signal and a category code indicating a type of a digital audio system such as a CD (compact disk) and a DAT (digital audio tape) are used. This is a method for controlling serial copying so that digital copying can be performed only once.

That is, in the case of this SCMS system,
SCM comprising copy prohibition / permission flag and category code to be transmitted together with digital audio signal
Based on the S information, the digital audio signal of the first generation can be copied, but the copy of the digital audio signal cannot be further copied, so that generation restriction control of the duplication of the digital audio signal can be performed. Has been.

In the CGMS system, for example, in the case of an analog image signal, 2-bit additional information for duplication control is superimposed on a specific one horizontal section in the vertical blanking period, and the digital image signal may be used. For example, this is a method in which 2-bit additional information for duplication control is added to digital image data and transmitted.

In the case of the CGMS system, the meaning of 2-bit information (hereinafter referred to as CGMS information) is: [00]... Can be copied [10]... Can be copied once (only one generation can be copied) [11] ] ... Reproduction is prohibited (absolute reproduction is prohibited).

The CGMS information added to the image information is [1
0], the CGMS-compatible recording apparatus determines that the duplicate recording of the image information is possible and executes the recording. However, the recorded image signal includes the CGMS rewritten to [11]. Information is added. If the CGMS information added to the image information to be recorded is [11], the CGMS-compatible recording apparatus prohibits the duplication recording of the image signal and prohibits the execution of the recording.

As described above, generation limit control of copy (duplication) can be performed for an audio signal or a video signal (image information) by the SCMS method or the CGMS method.

[0011]

By the way, the aforementioned S
When the CMS system or the CGMS system is used, generation management of duplication of an information signal such as an audio signal or a video signal is performed, thereby preventing the copied information signal from being copied to another recording medium. . However, for example, a first generation information signal recorded on a CD and provided from a content maker can be copied without limitation using the same recording device from that CD.

For this reason, instead of using the above-described method of limiting generations of duplication with the risk of mass duplication of information signals, for example, copying of information signals from the beginning on a medium such as a CD is prohibited. It is conceivable to provide an information signal by using a copy-prohibited disk.

[0013] However, when the information signal is provided by the copy-protected disk, the copyright of the copyright holder of the information signal can be surely protected, but the user of the information signal is not from the copy-protected disk. Therefore, it becomes impossible to use the desired information signal, so that the restriction imposed on the user is increased, which is considered to be undesirable.

For example, in the case of a copy-prohibited disc, only a desired song is selected from CDs performed within the range of private duplication, and the selected song is called a small magneto-optical disc called MD (mini disc) or a cassette tape. Music listening, such as copying on a car stereo or listening on a commuter train using a portable player, is limited.

[0015] In view of the above, the present invention provides an information signal capable of properly protecting the copyright of the copyright holder of the information signal and not impairing the convenience of the user of the information signal. It is an object to provide a duplication management method, an information signal duplication management system, an information signal output device, an information signal recording device, and an information signal recording medium.

[0016]

In order to solve the above problems, an information signal duplication management method according to the first aspect of the present invention comprises:
The information signal is transmitted by adding the identification information and the number of permitted duplications for limiting the number of duplications, and for each recording device, each information signal is identified by the identification information, and the number of permitted duplications for each information signal is determined. It is characterized by management.

According to the information signal duplication management method of the present invention, the number of permitted duplications added to the information signal is managed in each recording device for each information signal.
Then, based on the number of permitted duplications, for example, the duplication of the information signal to the recording medium is controlled.

As described above, the number of duplications can be limited for each recording apparatus and for each information signal.
The duplication management of the information signal can be performed without unduly harming the right of the copyright holder of the information signal and without impairing the convenience of the user using the information signal.

According to a second aspect of the present invention, there is provided the information signal duplication management method according to the first aspect, wherein the identification information and the number of permitted duplications are stored in the recording device. The duplication history information including the duplication number management information for management is stored and managed in a memory, and when duplicating the information signal, the duplication of the information signal to be duplicated stored in the memory is performed. The present invention is characterized in that, based on the history information, the duplication is controlled, and the duplication count management information is updated as necessary.

According to the information signal duplication management method of the present invention, duplication history information comprising identification information added to an information signal and duplication count management information for managing duplication permitted counts Is stored in the memory of the recording device.

When duplicating the information signal,
The duplication is controlled based on the duplication history information stored in the memory, and the duplication count management information of the duplication history information is updated as necessary.

Here, in the updating, when there is no copy history information having the same identification information in the memory of the recording device, the copy history information including the identification information and the copy number management information is additionally recorded. Then, a predetermined update process is performed on the copy number management information of the copy history information of the information signal.

Thus, the number of permitted duplications for each information signal is managed for each recording device, and for each information signal, how many more times duplication is possible is managed, and the number of permitted duplications is controlled according to the number of permitted duplications. Thus, the duplication control of the information signal can be appropriately and accurately performed.

According to a third aspect of the present invention, there is provided the information signal duplication management method according to the second aspect, wherein the recording apparatus performs duplication of the information signal. And duplicating by adding device identification information for identifying the device that has made the duplication to the information signal.

According to the information signal duplication management method of the present invention, when duplicating an information signal onto a recording medium, the device identification information of the duplicating recording device is added to the information signal. Be recorded.

Thus, by confirming the device identification information added to the information signal, it is possible to reliably identify which recording device has reproduced the information signal. In addition, the number of times of copying for each information signal can be managed reliably and accurately for each recording device.

According to a fourth aspect of the present invention, there is provided the information signal duplication management method according to the third aspect, wherein when duplicating the information signal, the information signal duplication is performed. In order to reduce the number of permitted duplications managed by the duplication number management information for, when erasing the already duplicated information signal from the recording medium, the device identification information added to the already duplicated information signal, Only when it matches the device identification information of the device that performs the deletion,
The number of permitted copies managed by the number-of-times-of-copying management information for the already-copied information signal is restored.

According to the information signal duplication management method of the present invention, when the information signal is duplicated, the duplication history information stored and managed in the memory of the recording device is the information signal. Is updated so that the number of permitted copies for is reduced.

Further, when the information signal already recorded on the recording medium is erased, and when the information signal to be erased is a signal duplicated by the own apparatus, the information to be erased is deleted. The copy history information of the signal is updated so that the number of permitted copies is restored.

Thus, when the information signal recorded on the recording medium is erased by the own device, it is determined that the erased information signal has not been duplicated, and the number of permitted duplications is increased.
Since the information signal is restored, the duplication of the information signal is permitted until the duplicated information signal is present for the initial number of times that the duplication is permitted.

Therefore, the convenience of the user of the information signal is not impaired, and the number of times the information signal is copied is limited, so that the rights of the copyright holder can be appropriately protected.

According to a fifth aspect of the present invention, there is provided an information signal duplication management method according to the first, second, third or fourth aspect, wherein The information signal is characterized by adding information for prohibiting the next generation copy.

According to the information signal duplication management method of the present invention, when the information whose copy number is limited is copied to the recording medium, the information for prohibiting the next generation duplication is used. Copying of the copied information signal is disabled.

Thus, since the information signal copied to the recording medium is not further copied, it is possible to appropriately protect the information signal without unduly damaging the rights of the copyright holder.

According to a sixth aspect of the present invention, there is provided an information signal duplication management method according to the first, second, third, fourth, or fifth aspect. When the permitted number of duplications is not added to the information signal that can be duplicated, the number of permitted duplications of the information signal is one, and the number of permitted duplications of the information signal is managed. It is characterized by.

According to the information signal duplication management method of the present invention, for example, a conventional information signal provided without the duplication permitted number is limited to one duplication permitted number. To be processed as an information signal. As a result, even for conventional information signals, without unduly harming the copyright of the copyright holder,
So that they can be properly protected.

According to a seventh aspect of the present invention, there is provided the information signal duplication management method according to the first aspect, wherein the identification information and the number of permitted duplications are digital watermark information. Is superimposed on the information signal.

According to the information signal duplication management method of the present invention, the identification information and the number of permitted duplications are superimposed on the information signal as electronic watermark information by electronic watermark processing. The digital watermarking process is a process of embedding information as noise in a portion that is not important to human perception existing in image data or music data, that is, a portion that is not redundant to music or video.

The additional information embedded in the image data or music data by such a digital watermarking process is not easily removed from the image data or music data. On the other hand, even after filtering processing and data compression processing on image data and music data, it is possible to detect additional information of a digital watermark embedded in the image data and music data from the image data and music data.

Therefore, for example, the digital information signal is
There is no D / A conversion to an analog information signal, and the number of permitted copies added to the information signal does not disappear due to filtering or data compression. Therefore, the number of permitted copies is reliably provided to the recording device together with the information signal, and the copy management using the permitted number of copies can be reliably performed.

The information signal duplication management method according to claim 8 is the information signal duplication management method according to claim 4, wherein the information for prohibiting the next generation duplication is digital watermark information. The information signal is superimposed on the information signal.

According to the information signal duplication management method of the present invention, the information for prohibiting the next generation duplication is superimposed on the information signal as digital watermark information by digital watermark processing. .

Thus, the information for prohibiting the next generation duplication can be reliably transmitted together with the information signal, so that the once duplicated information signal is further duplicated on another recording medium. Is prevented, and the rights of the copyright holder can be appropriately protected.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an information signal duplication management method, an information signal duplication management system, an information signal output device, an information signal recording device and an information signal recording medium according to the present invention will be described below with reference to the drawings. explain.

In the embodiment described below, an audio signal such as music is recorded as content information on a compact disk (hereinafter abbreviated as a CD) and provided to the user, and is recorded on the CD. An example will be described in which an audio signal is reproduced and output by a CD player and copied (copied) to a mini-disc (hereinafter, abbreviated as MD) by a recording device.

[About Authoring Apparatus] FIG. 1 shows an apparatus for recording an audio signal for creating a master CD on which music (audio signal) as content information is recorded, which is a so-called authoring apparatus used on the content maker side. is there.

As shown in FIG. 1, the authoring apparatus of this embodiment has an input terminal 1, a digital watermark information superimposing section (hereinafter, referred to as a WM superimposing section) 2, a digital watermark information forming section (hereinafter, a WM forming section). 3) Content ID generation unit 4, copy generation management information generation unit 5, copy count management information generation unit 6, data compression processing unit 7, additional information addition unit 8, recording processing unit 9, control unit 10, key operation Part 1
1 is provided. The CD 100 is a CD on which music is recorded by the authoring device of this example.

The authoring apparatus according to this embodiment adds three pieces of information, that is, a content ID, copy generation management information, and copy number management information, to a music piece as content information, and records the information on a CD 100. I do.
For this reason, the content ID generator 3, the copy generation management information generator 4, and the copy number management information generator 5 shown in FIG.
, The corresponding additional information is generated.

In this embodiment, the content ID
The generating unit 3 includes a content I as identification information for identifying a music piece to be recorded on the CD 100 as content information.
D is generated. In this embodiment, the content ID is an ISRC (International St).
and Standard Recording Code).

The copy generation management information generating section 4 is information for managing the generation of copies of each music piece, and in this embodiment, is SCMS information including a copy permission / prohibition flag and the like.

The copy number management information generating section 5 is information for limiting the number of copies of each music piece, and in this embodiment, for example, the number of permitted copies determined by the copyright holder.

The user of the authoring apparatus according to the present embodiment, before starting the recording of the music on the CD 100, starts the content I to be added to the music to be recorded on the CD 100.
D, SCMS information, and the number of permitted copies
Through the authoring device. The control unit 10 instructs the content ID generation unit 3, the copy generation management information generation unit 4, and the copy number management information generation unit 5 what information is to be generated based on an instruction input from the user. Form and supply control signals.

Thus, each unit of the content ID generation unit 3, the copy generation management information generation unit 4, and the copy number management information generation unit 5, based on the control signal from the control unit 10, controls the operation of the authoring apparatus of this embodiment. Content ID, SCMS information,
The number of permitted copies is formed, and these are supplied to the WM forming unit 6 and the additional information adding unit 8.

The WM forming unit 6 receives the supplied content I
D, SCMS information, and the number of permitted copies are subjected to digital watermarking processing to form respective digital watermark information.
As described above, the digital watermarking process is a process of embedding information as noise in a portion that is not important to human perception in image data or music data, that is, a portion that is not redundant to music or video.

The WM forming section 6 of the authoring apparatus
The supplied content ID, SCMS information, and the number of permitted copies are subjected to spectrum spread processing to form digital watermark information corresponding to each of the content ID, the SCMS information, and the permitted number of copies. These pieces of digital watermark information are supplied to the WM superimposing unit 2.

The music (digital audio signal) to be recorded on the CD 100 is input to the input terminal 1 through the WM.
It is supplied to the superimposition unit 2. As described above, the WM superimposing unit 2 includes the content I formed by the WM forming unit 6.
Digital watermark information corresponding to each of D, SCMS information, and the number of permitted copies is superimposed on the digital audio signal supplied through the input terminal 1.

In this case, each of the digital watermark information is
Although the digital audio signal can be superimposed on the same time domain, in this embodiment, each of the digital watermark information is superimposed on a different time domain of the digital audio signal. Then, in the WM superimposing unit 2, the content ID, SCMS information,
The digital audio signal on which the number of permitted copies is superimposed is supplied to the data compression processing unit 8.

The data compression processing section 7 performs data compression on the supplied digital audio signal by a predetermined method, and supplies this to the additional information adding section 8. As described above, the additional information adding unit 8 stores the content ID, the SCMS information, and the number of permitted copies from the content ID generation unit 3, the copy generation management information generation unit 4, and the copy count management information generation unit 5 into the CD.
100 is added to the digital audio signal of the music to be recorded.

In this case, each piece of additional information is recorded in a TOC (table of contents) or a directory of the CD 100 so as to correspond to the music to be recorded, or is stored in an area different from each music in association with each music. To be added. That is, at the time of reading, for each target music, the corresponding additional information is added so that it can be read.

The digital audio signal to which the content ID, the SCMS information, and the number of permitted copies have been added from the additional information adding unit 8 is transmitted to the CD 100 through the recording processing unit 9.
Will be recorded.

Thus, a CD 100 is created in which the content ID, the SCMS information, and the number of permitted copies are superimposed as digital watermark information, and the music piece added as the digital additional information is recorded. In this embodiment, many CDs on which the same information is recorded are created from the CD 100 (master CD) and can be provided to many end users.

[Reproduction Apparatus] FIG. 2 is a diagram for explaining an audio signal reproduction apparatus according to this embodiment.
In this embodiment, the audio signal reproducing device shown in FIG. 2 is a CD player. The CD player according to this embodiment can reproduce a CD 100S created based on the CD 100 created by the authoring apparatus shown in FIG.

As shown in FIG. 2, the CD of this embodiment
The player includes a reading unit 21, a data decoding unit 22,
D / A converter 23, analog audio signal output terminal 2
3a, digital interface 24, digital audio signal output terminal 241d, digital additional information output terminal 2
42d.

The reading section 21 reads out the music recorded on the CD 100S as a digital audio signal and additional information to be added to the music. The read music is supplied to the data decoding unit 22 and the digital interface 24. The additional information read from the CD 100S is transmitted to the digital interface 2
4 is supplied.

The data decoding section 22 decodes the music which has been converted into a digital audio signal which has been data-compressed by a predetermined method, and supplies the expanded digital audio signal to the D / A converter 23. D / A converter 2
Reference numeral 3 converts the music of the digital audio signal supplied after being expanded into the music of the analog audio signal, and outputs the music converted into the analog audio signal through the output terminal 23a.

In this case, the content ID, SCMS information, and the number of permitted copies of the digital data, which are added to the area other than the digital audio signal in the additional information adding section 8 of the authoring apparatus, are set to the digital audio signal. When the music of the signal is converted into an analog audio signal, it disappears.

However, the content I of the digital watermark information superimposed on the same time domain as that of the digital audio signal
D, SCMS information, and the number of permitted copies are not lost even if converted to an analog audio signal, and are output together with the analog audio signal, and are output to speakers, earphones, headphones,
Alternatively, it is supplied to an audio signal recording device or the like.

On the other hand, the digital interface 24 is supplied with the digital audio signal and the additional information converted into a digital signal as described above. The digital audio signal is output through the output terminal 241d, and the additional information is output through the output terminal 242d. Is output through The output music and additional information of the digital audio signal are supplied to, for example, an audio signal recording device having a digital interface.

[Recording Apparatus] FIG. 3 shows an audio signal recording apparatus for receiving a tune (audio signal) reproduced and output by the CD player shown in FIG. 2 and recording it on a recording medium. It is a figure for explaining. In this embodiment, the audio signal recording device shown in FIG.
(Mini disc) recording / reproducing device (hereinafter simply referred to as MD device). However, in the following, for simplicity of description, description of a sound reproduction system will be omitted.

As shown in FIG. 3, the MD of this embodiment
The device includes an analog audio signal input terminal 31, an analog interface 32, a compression encoding unit 33, a selector 34, a digital audio signal input terminal 35, a digital additional information input terminal 36, a digital interface 37,
Additional information detection unit 38, additional information addition unit 39, digital watermark information rewriting unit (hereinafter, referred to as WM rewriting unit) 40, and digital watermark information decoding unit (hereinafter, referred to as WM decoding unit).
41, a recording / deletion control unit 42, a reading unit 43, a deletion voice information additional information detection unit 44, a control unit 50, a key operation unit 51, a copy history information management memory 52, and a device I
A D memory 53 is provided. The MD 200 is a small magneto-optical disk called a mini disk, as described above.

As shown in FIG. 3, the MD apparatus according to this embodiment includes an analog interface 32 and a digital interface 37, receives an analog audio signal or a digital audio signal, and transmits the signal to the MD interface.
200, and MD200
The audio signal copied to the device can be deleted as necessary.

[Regarding Copy of Musical Piece (Audio Signal) to MD 200] The musical piece (analog audio signal) input through the analog input terminal 31 is supplied to the compression encoding unit 33 through the analog interface 32 and subjected to a predetermined data compression process. Is supplied to the selector 34.

The music (digital audio signal) input through the digital audio signal input terminal 35 is supplied to the selector 34 through the digital interface 37. The additional information input through the digital additional information input terminal 36 is
Is supplied to the additional information detection unit 38 through.

As shown in FIG. 3, the additional information detection unit 38 includes a content ID detection unit 381, a copy generation management information detection unit 382, and a copy number management information detection unit 383, and detects information supplied through the digital interface 37. , And detects additional information of interest.

That is, the content ID detection unit 381
Detects the content ID. The copy generation management information detection unit 382 detects SCMS information as copy generation management information. Also, the copy number management information detection unit 383
Detects the number of permitted copies as copy number management information. The content ID, SCMS information, and the number of permitted copies detected by each unit of the additional information
It is supplied to the control unit 50.

The selector 34 selects one of the data from the compression encoding unit 33 and the data from the digital interface unit 37 according to a selector control signal corresponding to a selection input from the user through the key operation unit 51. And output. The output data of the selector 34 is supplied to the recording / erasing control unit 42 via the additional information adding unit 39 and the WM rewriting unit 40. The output data of the selector 34 is also supplied to the WM decoding unit 41.

The WM decoding unit 41 extracts and determines the content ID, SCMS information, and the number of permitted copies that are superimposed on the output data (audio signal) from the selector 34 as digital watermark information. The discrimination output from the WM decoding unit 41 is supplied to the control unit 50.

As described above, in the WM decoding unit 41, the content ID, SCMS information,
The number of permitted copies is extracted and determined.
This is because a case where an analog audio signal is supplied is considered.

That is, in the CD 100S, the music that has been converted into a digital audio signal is recorded, and the content ID, SCMS information, and the number of permitted copies are recorded in an area other than the area where the music that has been converted into the digital audio signal is recorded. I have. For this reason, even if the digital audio signal and the additional information recorded on the CD 100S are read, if the digital audio signal is converted to an analog audio signal and output as an analog audio signal, the digital audio signal is different from the digital audio signal. ID, SCMS added to the area of
Information, the number of permitted copies, etc. are not output.

For this reason, it is superimposed on the digital audio signal,
Even when the digital audio signal is converted into an analog audio signal, the content ID, SCMS information, and the number of permitted copies, which are digital watermark information that can be accurately detected without disappearing, are detected. .

As a result, the MD apparatus of this embodiment can execute the content ID and SCM corresponding to the audio signal regardless of whether the signal is an analog audio signal or a digital audio signal.
S information and the number of permitted copies can be obtained.

In the WM decoding section 41, when the user switches the selector 34 to record the audio signal from the compression encoding section 33 in the MD 200, that is, when the audio signal supplied through the analog interface is processed. Only under the control of the control unit 50, each additional information set as digital watermark information may be detected.

The MD apparatus according to the present embodiment uses the content ID, SCMS
Based on the information, the number of permitted copies, and the copy history information stored in its own copy history information management memory 52, the number of copies is managed for each device and for each song.

In the MD device of this embodiment, the MD
When the SCMS information added to the music to be copied to the music 200 indicates that copying is prohibited, the control unit 50 controls the recording / deletion control unit 42 to copy the audio signal to the MD 200. Do not run.

When the SCMS information added to the music to be copied to the MD 200 indicates that one-generation copy is possible, the control unit 50 refers to its own copy history information management memory 52. Then, it is confirmed whether or not copy history information having the content ID of the music to be copied has already been stored.

FIG. 4 is a diagram for explaining copy history information stored in the copy history information management memory 52 of this embodiment. As shown in FIG. 4, the copy history information management memory 52 stores copy history information including a content ID and the number of permitted copies.

If there is no copy history information having the content ID of the music to be copied in the copy history information management memory 52, the control unit 50 of the MD apparatus of this embodiment adds the copy history information to the music. Copy history information including the content ID and the permitted number of copies is created in the copy history information management memory 52.

As a result, the copy history information corresponding to the music to be copied exists in the copy history information management memory 52. If the number of permitted copies of the copy history information corresponding to the music to be copied stored in the copy history information management memory 52 is 0, the control unit 50 determines the permitted number of times for the music. It is determined that the minute has already been copied, and the recording / erasing control unit 42 is controlled so that the song is not copied.

If the number of permitted copies of the copy history information corresponding to the music to be copied stored in the copy history information management memory 52 is one or more,
The control unit 50 subtracts the permitted number of times of copying of the copy history information by one, and the copy history information management memory 5
Then, the number of permitted copies of the corresponding copy history information stored in No. 2 is updated.

Then, the control unit 50 supplies the additional information adding unit 39 with the content ID of the music to be copied, SCMS information indicating that copying is prohibited, the number of permitted copies, and the device ID.

Here, when the music to be copied is supplied through the digital interface 37, the content ID and the number of permitted copies are determined by the content ID detecting section 381 of the additional information detecting section 38, This is information detected by the management information detection unit 383. When the music to be copied is supplied through the analog interface 32, the content ID and the number of permitted copies extracted and determined by the WM decoding unit 41 are used.

The SCMS information indicating that copying is prohibited is, for example, information formed in the control unit 50. The device ID is stored in the control unit 50.
The information is stored in advance in the device ID memory 53 connected to the device, is information unique to each device, and is information capable of identifying each device.

That is, in the present embodiment, the device ID unique to each device is stored in advance in the device ID memory 53, for example, at the time of manufacture. The information is read by the control unit 50 and is added to the additional information adding unit 39 together with other additional information.
Supplied to

Instead of providing the device ID memory individually, for example, the device ID is stored in the ROM provided in the control unit 50, and the device ID stored in the ROM is read out, and the additional information adding unit 39 is read. Of course.

The additional information adding section 39 adds content information, SCMS information, the number of permitted copies, and a device ID to the audio signal from the selector 34.
Further, the control unit 50 controls the SCMS indicating that copying is prohibited.
The information is supplied to the WM rewriting unit 40. The WM rewriting unit 40
The electronic watermark information is formed by spreading the SCMS information spectrum indicating the copy prohibition from the control unit 50, and supplies this to the additional information adding unit 39.

In this embodiment, the new SCMS information indicating the copy prohibition, which is the digital watermark information, is copied to the MD 200 after the SCMS information, which has already been superimposed, is removed. Superimpose on music.

Instead of removing the digital watermark information already superimposed as described above and superimposing new digital watermark information, for example, the copy prohibition which is newly set as digital watermark information is prohibited. May be superimposed at a position different from the digital watermark information already superimposed on the audio signal. That is, the SCMS information indicating the copy prohibition, which is the digital watermark information, may be extracted and superimposed on the music to be copied so that the determination can be made.

As described above, the additional information is added through the additional information adding unit 39 and the WM rewriting unit 40, and the music in which the SCMS information as the electronic watermark information is rewritten is supplied to the recording / erasing control unit 42. You.

In this case, the music supplied to the recording / erasing control unit 42 is one for which one-generation copying has been permitted, so that the recording / erasing control unit 42 The target music is copied to the MD 200. As a result, the music (audio signal) supplied from the CD player shown in FIG. 2 is controlled by the MD device of this embodiment shown in FIG. In this case, copying can be performed only the permitted number of times.

As described above, for the music piece that has been copied the permitted number of times, the copy history having the content ID of the music piece stored in the copy history information management memory 52 of the MD device is used. Since the number of permitted times for copying information is zero, further copying is not allowed as described above.

FIG. 5 is a circuit diagram of the embodiment shown in FIG.
CD100S to be played by D player
FIG. 4 is a diagram for explaining an MD 200 to which an audio signal is copied by the MD device shown in FIG. 3 which receives supply of an audio signal reproduced and output by the CD player.

As shown in FIG. 5, in this embodiment, the C created by the authoring apparatus shown in FIG.
A music piece is recorded on the CD 100S created from the D100. The music piece has a content ID, SCMS information as copy generation management information, and a copy permitted number as copy number management information. The information is also superimposed as watermark information.

When the music recorded on the CD 100S is reproduced by a CD player and supplied to the MD device and copied to the MD 200, the music copied to the MD 200 includes a content ID and copy generation management information. The SCMS information indicating copy prohibition, the number of permitted copies as copy number management information, and the device ID of the MD device are added. Superimposed.

S is added to the music recorded on the MD 200 and superimposed as digital watermark information.
As described above, the CMS information includes SC indicating that copying is prohibited.
Since the information is MS information, the music copied to the MD 200 cannot be copied to another recording medium by the SCMS information indicating that copying is prohibited. That is,
The copied music cannot be copied.

[Erase of Music (Audio Signal) Copied to MD 200] As described above, the MD apparatus of this embodiment also has a function of erasing music copied to MD 200. is there. When deleting the music copied to the MD 200 by the MD device of this embodiment, the number of permitted copies of the copy history information of the music to be deleted stored in the copy history information management memory 52 is increased by one. .

In this way, even if a piece of music has been copied once before and disappears due to deletion of the copied piece of music, the piece of music is copied for the permitted number of copies. Even after this, further copies are made possible.

The MD device of this embodiment is configured to accept, through the key operation unit 51, an input of an instruction to delete a song copied to the MD 200 from the user. In this case, all songs recorded on the MD 200 can be erased, or a desired song can be erased, for example, by erasing the number of songs. Have been able to.

When the user inputs an erasure instruction, the control unit 50 controls the readout unit 43 to add, from among the music pieces recorded on the MD 200, the additional music piece added to the music piece instructed to be erased. Read information. The read additional information is supplied to the additional information detection unit 44 for the erased audio signal. The additional information detection unit 44 includes a content ID detection unit 441 and a device ID detection unit 442, as shown in FIG.

[0109] The content ID detecting section 441 detects the content ID of the music piece instructed to delete. Further, the device ID detection unit 442 detects the device ID of the device that copied the song instructed to be deleted to the MD 200. The detected content ID and device ID are supplied to the control unit 50.

[0110] Then, based on the content ID from the content ID detection unit 441, the control unit 50
The copy history information in the copy history information management memory 52 is searched. If there is no copy history information with the same content ID, and even if there is copy history information with the same content ID, the device ID detected by the device ID detection unit 442 and the MD device of this embodiment If the device ID is different from the device ID, the music to be erased is not copied by the MD device, so the control unit 50 controls the recording / erasure control unit 42 to erase by the user. The tune instructed to be deleted is deleted from the MD 200.

However, copy history information having the same content ID as the content ID detected by the content ID detection unit 441 exists, and the device ID detection unit 4
42 and the device ID detected by
If the device ID of the device D matches, the music to be deleted is copied on the MD device.

In this case, the control unit 50 increases the number of permitted copies of the corresponding copy history information stored in the copy history information management memory 52 by one, and in this embodiment, performs recording / erasing. The control unit 42 is controlled to delete the music designated by the user to be deleted from the MD 200.

As a result, the MD 20
If the audio signal whose copy permitted number has been limited to 0 is deleted by this MD device, the copy permitted number of the copy history information stored in the copy history information management memory 52 is deleted. Since the minutes are added, the deleted copy of the deleted music can be copied.

That is, the number of permitted copies in this case corresponds to the number of the music pieces that can be formed by copying. Therefore, when the number of permitted copies is plural, and the number of copies permitted for each recording medium is different, the number of recording media on which the music has been copied is determined by the number of permitted copies of the audio signal (initial value). ).

After the music recorded on the CD 100S has been copied the permitted number of times, the subsequent copying of the audio signal does not become impossible. That is, as long as there are music pieces that have been copied for the permitted number of times of copying (initial value), the music pieces cannot be copied.

However, when the music is erased by using the copied MD device, as described above, the number of permitted copies of the copy history information managed by the MD device is increased by the erased amount. , The music can be further copied by the MD device.

As a result, for example, music copying provided by being recorded on a CD can be restricted without limiting the convenience of a user who wants to copy and enjoy the music on another recording medium. , The rights of the copyright holder of the music can be properly protected.

[Processing for Copying Music and Deleting Music] The processing for copying music performed in the MD apparatus of this embodiment will be described with reference to the flowchart of FIG. Will be described with reference to the flowchart of FIG.

FIG. 6 is a flow chart for explaining a process at the time of copying a music piece in the MD apparatus according to this embodiment, and is a processing executed when an instruction to start copying of the supplied music piece is input. It is.

When the user instructs the start of copying through the key operation unit 51, the control unit 50 causes the copy generation management information detection unit 382 or the WM decoding unit 41 to operate, for example, a CD player, as described above. SCMS as copy generation management information detected from music supplied from a playback device or an information signal output device
The information is confirmed (step S101).

Then, it is determined whether the SCMS information indicates that copy is prohibited, indicates that one-generation copy is possible, or indicates that copy is free (copy free) (step S102). ). Step S
In the determination process of 102, the confirmed SCMS information is
When the control unit 50 determines that it indicates that copying is prohibited, the control unit 50 controls the recording / erasing control unit 42 to
The copying of the audio signal instructed to be copied is not executed (step S103).

In the determination process of step S102, when the confirmed SCMS information indicates that the copy is free, the control unit 50 transmits the content ID detected by the additional information detection unit 38 and the copy generation management information. The additional information adding section 39 supplies the SCMS information as the copy information and the number of permitted copies as the copy number management information, and adds the additional information to the music to be copied, and the recording medium, in this embodiment,
Copy to the MD 200 (step S104). In this case, the number of permitted copies is set to be information indicating that the music is copy-free and copying can be freely performed.

In the determination process of step S102, if the confirmed SCMS information indicates that one-generation copy is possible, the contents I added or superimposed on the music to be copied are copied.
Based on D, the copy history information is searched for in the copy history information management memory 52 (step S105), and it is confirmed whether there is copy history information having the same content ID (step S106).

If it is determined in step S106 that there is no copy history information having the same content ID as the music to be copied, the copy ID information of the music to be copied is stored in the copy history information management memory 52. The copy history information including the permitted number of times is created in the copy history information management memory 52 (step S107).

In this embodiment, if the audio signal to be copied is a signal that can be copied for one generation, but the number of permitted copies is not added, the copy permission of the music is permitted. The number of times is determined to be one, and the control unit 50 creates copy history information with the number of permitted copies being one.

In the determination processing of step S106, when it is determined that there is copy history information having the same content ID as the music to be copied, and in the processing of step S107, the copy history information is stored in the copy history information management memory 52. After the creation, it is determined whether the number of permitted copies of the copy history information in the copy history information management memory 52 is one or more (step S108).

If it is determined in step S108 that the number of permitted copies is zero, it is determined that the permitted number of copies has already been completed for the music, and the process proceeds to step S103. Proceed to prohibit copying the song.

If it is determined in step S108 that the number of permitted copies is one or more,
The control unit 50 includes a copy history information management memory 52
Is decremented by one for the permitted number of copies of the copy history information stored in (step S109).

Then, the control unit 50 sets the content ID detected by the additional information detection unit 38 and the SCM indicating the copy inhibition formed by the control unit 50.
The S information and the device ID of the MD device of this embodiment stored in the ROM provided in the control unit 50 are supplied to the additional information adding unit 39, and the additional information is added to the music to be copied. , This is MD200
(Step S110).

As described above, the MD device (recording device) of this embodiment manages the number of permitted copies of a music in a recording device and a recording / reproducing device for copying a music, and an approximate number of permitted copies is made. For songs that have ended,
Prohibit copying the song. Thereby, the right of the copyright holder of the music can be properly protected without impairing the convenience of the user of the music.

Next, a description will be given of a process performed in the MD device according to the present embodiment at the time of erasing music recorded on the MD. FIG. 7 is a flowchart for explaining processing when erasing music recorded on the MD in the MD device of this embodiment.

As described above, the MD apparatus according to this embodiment can be configured such that, in response to an instruction from the user, all or a part of the music recorded on the MD 200 loaded in the MD apparatus, for example, a designated music piece. It is possible to delete the music that has been performed. When such a deletion instruction from the user is input through the key operation unit 51, the control unit 50 executes the processing shown in FIG.

When the user inputs an instruction to delete the music recorded on the MD 200, the control unit 50
MD of the content ID and device ID of the designated music
200, and retrieves copy history information in the copy history information management memory 52 based on the read content ID (step S201).

Then, the control section 50 determines whether or not there is copy history information of the music to be deleted (step S202). In this determination process, when it is determined that there is copy history information of the target music, the control unit 50 determines the device ID read from the MD 200 and the device ID of the MD device that deletes the music.
Are compared with each other (step S203), and it is determined whether or not both match (step S204).

In the determination processing of step S204, M
When it is determined that the device ID read from the D200 matches the device ID of the MD device, the music piece instructed to be deleted is read from the MD device by the MD2.
00, the number of permitted copies of the copy history information of the music piece instructed to be erased stored in the copy history information management memory 52 is increased by one (step S205) and erased. Is deleted from the MD 200 (step S206).

Further, in the determination processing of step S202, when it is determined that the copy history information corresponding to the music piece instructed to be deleted does not exist in the copy history information management memory 52, and in the determination processing of step S204. If it is determined that the device ID added to the song instructed to be deleted does not match the device ID of the MD device that executes the deletion of the song, the number of permitted copies in the copy history information is updated. Is not performed, the designated music is simply deleted from the MD 200 (step S206).

Thus, when erasing the music copied to the recording medium by the own device, the number of permitted copies of the copy history information stored in the copy history information management memory 52 is increased by one. Therefore, for example, even if the audio signal has already been copied for the permitted number of copies, it is possible to further copy the deleted audio signal recorded on the original CD 100S.

In this case, as described above, the number of permitted copies for each audio signal corresponds to the number of audio signals copied and present on a recording medium such as an MD.
Therefore, as described above, when the number of permitted copies of the copy history information is increased by erasing the copied music, the increased number of copies can be made. As a result, it is possible to appropriately protect the right of the copyright holder of the music without impairing the convenience of the user of the music.

When an instruction to delete music that has not been copied on the own device is given, for example, a warning message is displayed on an LCD (liquid crystal display) provided in the MD device, or a warning message provided in the MD device is displayed. LED
(Light emitting diode) is lit or blinked to notify the user of the instruction to delete the music not copied by the user and request confirmation input. In this way, it is possible to prompt the user to delete the audio signal in the device to which the audio signal instructed to be deleted is copied.

In the above-described embodiment, the case where the content information to be copied is an audio signal such as a music piece has been described as an example. However, the content information is not limited to an audio signal. Also, the present invention can be applied to a case where various types of computer data transmitted and received between computers are copied.

For example, when the content information is a video signal, as described above, C
By adding the GMS information, it is possible to limit the generation of the copy of the video signal. This CGMS
If the content ID and the number-of-copies management information are added in addition to the information, the number of copies is managed and the copy is controlled based on the number of copies in the same manner as in the above-described music copying system. Can be

Also, no matter what information signal the content information is, copy generation management information is not necessarily required. In other words, if the content ID capable of identifying the content information and the copy number management information are added in association with the content information, the recording device is configured based on the content ID and the copy number management information. And the recording / reproducing apparatus manages the number of copies, and appropriately controls the copying of the content information according to the managed number of copies.

Further, in the above-described embodiment, the audio signal such as music as content information is described as being provided by being recorded on a CD. However, the present invention is not limited to this. For example, when providing content information through various broadcast media that provides a broadcast program through a satellite broadcast or terrestrial broadcast, or a cable, or when providing various content information through a network such as the Internet, The invention can be applied.

In this case, in a content information output device for providing content information through a network such as satellite broadcasting, terrestrial broadcasting, cable, or the Internet, the content information to be output includes a content ID, copy generation management information, What is necessary is just to add copy number management information and the like. Therefore, the content information output device can be configured by changing the recording processing unit 9 of the authoring device shown in FIG. 1 to an output processing unit that forms a signal to be output.

In this case, the content information output device is:
The present invention can be applied to various output devices that output content information, such as information devices such as personal computers having a communication function, as well as broadcast devices.

When content information is provided through satellite broadcasting, terrestrial broadcasting, cable, or the like, a reception signal for receiving a desired broadcast signal, such as a set-top box, and making it usable and outputting it. The device corresponds to a reproducing device such as the above-mentioned CD player.

Further, in the above-described embodiment, the recording medium for recording the audio signal as the content information has been described as an MD (mini-disc), but the present invention is not limited to this. For example, the recording medium to which the content information is copied may be a solid-state memory made of a semiconductor, or not limited to a removable medium, but may be a hard disk built in a device.

A DVD (digital video disk)
Various recording media such as an optical disk such as an optical disc and a CD-R (rewritable CD), a magneto-optical disk, a magnetic disk, and a magnetic tape such as a video tape and a cassette tape can be used.

Accordingly, the recording device is not limited to the MD device, but may be a DVD regulation device or a recording / reproducing device, a recording device or a recording / reproducing device for various optical disks, a recording device or a recording / reproducing device for a magneto-optical disk, Recording and reproducing apparatus for magnetic disks, video tape recorders and digital video tape recorders, tape recorders for audio and digital audio tape recorders called DATs, and further, upon receiving the supply of content information, it is used for various types of recording. The recording device according to the present invention can be applied to various recording devices and recording / reproducing devices, such as a personal computer that records and retains data on a medium.

When the recording medium onto which the content information is copied is a CD-R, the device ID is RI
An ID called D (Recorder ID) can be used.

In the above-described embodiment, the digital watermark information of the content ID, the copy generation management information, and the copy number management information is formed by using the spread spectrum technique, and is superimposed on the content information. . However, the formation of the digital watermark information is not limited to the one using the spread spectrum technique, and the digital watermark information formed using various digital watermark techniques can be superimposed on the content information. In this case, a WM decoding unit corresponding to the digital watermark technology used for forming the digital watermark information is used.

In the above embodiment, the content ID may be superimposed on the information signal to be duplicated as digital watermark information when the content information is duplicated. In this case, for example, when deleting the copied content information, the device ID used as the digital watermark information may be detected.

In the above-described embodiment, the number of permitted copies of a CD created from a CD created by the authoring apparatus and provided to the user is not rewritten. However, each time a copy is made, this may be rewritten to manage the number of permitted copies of the content information recorded on the medium.

In this case, by referring to the number of permitted copies recorded on the recording medium, even if the content information is one-generation copy-capable content recorded on the recording medium, the number of permitted copies may be reduced. If the content information has already been copied, the number of permitted copies is set to, for example, zero, so that copying of the content information is prohibited, and the rights of the copyright holder can be appropriately protected.

As described above, a recording device that provides various contents information such as audio signals, video signals, and computer data with the number of permitted copies as the number-of-times-of-management management information provided, and copies the contents information. Alternatively, the recording / reproducing apparatus manages the number of permitted copies so that the conventional SCMS information or CGM can be used.
In addition to the copy generation management based on the S information, the number of permitted copies can be managed, so that the first generation content information can be copied any number of times. The problem of generation management can be solved.

Further, since the conventional copy generation management system such as SCMS or CGMS can be shared with the management of the number of copies, finer copy control can be performed.

As described above, the content information having no copy number management information is handled as content information that can be copied once, unless the content information is copy-prohibited or copy-free content information. Also, with regard to a conventional medium, the number of permitted copies can be managed, and the right of the copyright holder of the content information can be properly protected without impairing the convenience of the user.

Further, since the content ID and the number of permitted copies remain in the recording device or the copy history information management memory of the recording device, they can be used for, for example, searching for the content information copied in the device.

When the content information copied to the recording medium is deleted, the number of permitted copies is increased by the deleted number. As a result, the use of personal content information that temporarily copies the content information to a recording medium and uses the content by using a car stereo, a portable playback device, or the like is possible as in the related art. Illegal copying, such as copying large amounts of content information and selling it,
You can make it impossible.

[0160] Further, since a device ID capable of specifying the copying device is recorded on the recording medium, the copying device can be specified.

In the recording apparatus, since copy history information is managed, a conventional reproducing device or the like can be used as it is. For example, an ISRC code is already added to a CD (compact disk), and this is used as a content ID by a digital interface (I / O).
EC958), it is possible to identify each piece of content information by using this ISRC and manage the number of permitted copies for each piece of content information on the side of the apparatus that executes copying.

As described above, the contents I
By adding D, copy generation management information, and copy number management information to the content information as digital watermark information,
Even when a conventional playback device or the like is used in a so-called analog connection, the number of permitted copies of content information can be managed.

Since the number of permitted copies must be managed only for content information that can be copied for one generation, copy history information is stored in the copy history information management memory for copy prohibited or copy free content information. If not left, the copy history information management memory of the recording device and the recording / reproducing device that copy the content information can be effectively used.

As the copy history information management memory, for example, a memory detachable from a recording device or a recording / reproducing device may be used. By doing so, there is an advantage that the copy history information can be centrally managed even if the user uses a plurality of recording devices and recording / reproducing devices in combination.

[0165]

As described above, according to the duplication management method of the present invention, the number of duplications can be limited for each recording device and for each information signal. The duplication management of the information signal can be performed without unduly harming the rights of the copyright holder of the information signal and without impairing the convenience of the user who uses the information signal.

According to the duplication management method of the present invention, the permitted number of duplications for each information signal is managed for each recording device, and how many more times can be duplicated for each information signal. Is accurately managed, and the duplication control of the information signal can be appropriately and accurately performed in accordance with the number of permitted duplications.

Further, according to the copy management method of the present invention, by confirming the device identification information added to the information signal, it is possible to reliably identify which recording device has copied the information signal. be able to. In addition, the number of duplications for each information signal can be reliably and accurately managed for each recording device.

Further, according to the copy management method of the present invention, when the information signal recorded on the recording medium is deleted by the own device, the deleted information signal is not copied. As a matter of fact, the number of permitted duplications is restored, so that the information signal can be duplicated until the number of duplicated information signals is equal to the number of initial permitted duplications. As a result, the convenience of the user of the information signal is not impaired, and the number of times the information signal is copied is limited, so that the rights of the copyright holder can be appropriately protected.

According to the copy management method of the present invention, since the information signal copied to the recording medium is not copied further, the right of the copyright holder is not unduly harmed. , Can be properly protected.

According to the copy management method of the present invention, the conventional information signal can be appropriately protected without unduly harming the copyright of the copyright holder.

Further, according to the copy management method of the present invention, the digital information signal is D / A converted to an analog information signal, or the digital watermark information is added to the information signal by filtering or data compression. Since the superimposed identification information and the permitted number of duplications do not disappear, the identification information and the permitted number of duplications are reliably provided to the recording device together with the information signal, and the duplication management using the permitted number of duplications is reliably performed. be able to.

According to the copy management method of the present invention, the information for prohibiting the next generation copy can be reliably transmitted together with the information signal. The copied information signal is prevented from being further copied to another recording medium, and the rights of the copyright holder can be appropriately protected.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining a CD (Compact Disc) authoring device to which an embodiment of an information signal output device according to the present invention is applied.

FIG. 2 is a block diagram for explaining a CD player for reproducing an audio signal from a CD created from a master CD created by the authoring apparatus shown in FIG.

3 is a block diagram for explaining an MD apparatus to which an embodiment of a recording apparatus according to the present invention for recording an audio signal reproduced and output by the CD player shown in FIG. 2 on a recording medium is applied; is there.

4 is a diagram for explaining a copy history information management memory of the MD device shown in FIG.

FIG. 5 describes additional information added to content information recorded on a CD (compact disc) and additional information added to content information reproduced from a CD and copied to an MD (mini disc). FIG.

FIG. 6 is a flowchart for explaining processing when copying content information in the MD device shown in FIG. 3;

FIG. 7 is a flowchart for explaining a process at the time of erasing content information in the MD device shown in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input terminal, 2 ... Digital watermark information superposition part (WM superposition part), 3 ... Digital watermark information formation part (WM formation part), 4 ...
Content ID generation unit, 5: copy generation management information generation unit, 6: copy number management information generation unit, 7: data compression processing unit, 8: additional information addition unit, 9: recording processing unit, 10: control unit, 11 ... Key operation unit, 21 ... readout unit,
22: data decoding unit, 23: D / A converter, 2
3a: Output terminal for analog audio signal, 24: Digital interface, 241d: Output terminal for digital audio signal, 242d: Output terminal for additional digital information, 31: Input terminal for analog audio signal, 32: Analog interface, 33: Compression encoding Part, 34 ... selector, 3
5 ... Input terminal for digital audio signal, 36 ... Input terminal for additional digital information, 37 ... Digital interface, 3
8 additional information detection unit, 381 content ID detection unit,
382: copy generation management information detecting unit, 383: copy number management information detecting unit, 39: additional information adding unit, 40: digital watermark information rewriting unit (WM rewriting unit), 41: digital watermark information decoding unit (WM decoding unit) , 42 ... recording control unit,
43: Readout unit, 44: Additional information detection unit of erased voice information, 441: Content ID detection unit, 442: Device ID
Detection unit, 50: control unit, 51: key operation unit, 5
2: Copy history information management memory, 53: Device ID memory, 100, 100S: CD (compact disc),
200… MD (mini disc)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 AB05 AB07 BC03 BC06 CC04 DE49 DE50 FG18 GK17 HL07 HL11 9A001 BB04 BZ03 DD09 EE03 JJ13 JZ33 KK43 LL03

Claims (28)

[Claims] An information signal is transmitted by adding identification information and a permitted number of duplications for limiting the number of duplications. Each information signal is identified by the identification information for each recording device. An information signal duplication management method, comprising: managing the number of permitted duplications of an information signal. 2. The recording apparatus according to claim 1, wherein the copy history information including the identification information and the copy count management information for managing the copy count is stored and managed in a memory, and the information signal is copied. At this time, based on the duplication history information on the information signal to be duplicated stored in the memory, the duplication control is performed, and the duplication count management information is updated as necessary. 2. The information signal duplication management method according to claim 1, wherein: 3. The recording device according to claim 2, wherein, when duplicating the information signal, the duplication is performed by adding device identification information for specifying the duplicating device to the information signal. The information signal duplication management method according to claim 2. 4. When duplicating the information signal,
When the number of permitted duplications managed by the duplication number management information for the information signal is reduced, and the duplicated information signal is deleted from the recording medium, the device identification added to the duplicated information signal is deleted. Information
The copy permission number managed by the copy number management information for the already copied information signal is restored only when the device identification information of the device that executes the erasure matches the device identification information. 3. The information signal duplication management method according to 3. 5. The information signal to be copied according to claim 1, wherein information for prohibiting the next generation copy is added to the information signal to be copied. Information signal management method. 6. When the permitted number of duplications is not added to the information signal that can be duplicated, the permitted number of duplications of the information signal is assumed to be one, and the permitted number of duplications of the information signal is managed. 6. The information signal duplication management method according to claim 1, wherein the information signal is duplicated. 7. The identification information and the number of permitted copies are:
2. The information signal duplication management method according to claim 1, wherein the information signal is superimposed on the information signal as digital watermark information. 8. The method according to claim 4, wherein the information for prohibiting the next generation copy is superimposed on the information signal as digital watermark information. 9. An information signal output device for outputting an information signal whose copy number is limited, and information for receiving the information signal output from the information signal output device and recording the information signal on a recording medium An information signal duplication management system comprising a signal recording device, wherein the information signal output device restricts the number of times of duplication of the information signal to be output; A number-of-times-of-copy adding means for adding a number of times of permitted copying for the user, and an information signal output means for outputting the information signal to which the identification information and the number of times of permitted copying are added. Identification information detecting means for detecting the identification information from the information signal, and a permitted copy number detecting means for detecting the permitted number of copies from the supplied information signal; And the identification information from another information detecting means and the copy permission number from the copy count detecting means in association,
An information signal duplication control system, comprising: a duplication permission number management unit that manages the duplication permission number for each information signal. 10. The duplication permission number management means of the information signal recording device, the identification information from the identification information detection means and the duplication number for managing the duplication permission number from the duplication permission number detection means. A memory for storing duplication history information comprising management information; and updating means for updating the duplication count management information of the duplication history information for the information signal as necessary, wherein the information signal recording The apparatus, when performing the duplication of the information signal, based on the duplication history information on the information signal to be duplicated and stored in the memory, based on the duplication control information, it is provided with a duplication control unit that controls the duplication The information signal duplication management system according to claim 9, characterized in that: 11. The information signal recording device according to claim 1, further comprising a device identification information adding unit for adding, to the information signal, device identification information for specifying a recording device to be duplicated, to the information signal to be duplicated. Claim 10
2. An information signal duplication management system according to (1). 12. An information signal recording device, comprising: device identification information detecting means for detecting the device identification information added to a duplicated information signal duplicated on a recording medium; and duplicated information recorded on a recording medium. An information signal erasing unit for erasing a signal, wherein the updating unit of the information signal recording device, when duplication of the information signal is performed, the duplication managed by the duplication number management information for the information signal In order to reduce the number of times permitted, the information signal erasing means, when the already duplicated information signal is erased,
The device identification information from the device identification information detection means,
When the device identification information of the information signal recording device matches, the copy permitted number managed by the copy number management information for the already copied information signal is restored. 12. The information signal duplication management system according to 11. 13. An information signal recording device, comprising: a next-generation duplication prohibition information adding means for adding information for prohibiting a next generation duplication to the information signal recorded on the recording medium; And a next-generation duplication prohibition information detecting means for detecting information for prohibiting next-generation duplication from, when the information for prohibiting the next-generation duplication is detected by the next-generation duplication prohibition means, 13. The information signal duplication management system according to claim 10, wherein the duplication control means prohibits duplication of the information signal. 14. The duplication permitted number management means of the information signal recording apparatus, wherein the duplication permitted number detecting means detects the number of permitted duplication times from the supplied information signal, and sets the information signal once. 14. The information signal duplication management system according to claim 9, wherein the number of permitted duplications of the information signal is managed assuming that only the duplication is possible. 15. The information signal output device, wherein the identification information adding means superimposes the identification information on the information signal as digital watermark information; Is superimposed on the information signal as digital watermark information. In the information signal recording device, the identification information detecting means detects the identification information superimposed on the supplied information signal as digital watermark information. 10. The information signal duplication method according to claim 9, wherein the duplication permission number detection means detects the duplication permission number superimposed on the supplied information signal as digital watermark information. Management system. 16. The information signal recording device, wherein the next generation duplication prohibition information adding means superimposes information for prohibiting the next generation duplication on the information signal recorded as digital watermark information. 13. The method according to claim 12, wherein the next-generation duplication prohibition information detecting means detects information for prohibiting duplication of the next generation, which is superimposed on the input information signal as digital watermark information. Information signal duplication management system. 17. An identification information adding means for adding identification information to the information signal to be output, a copy number adding means for adding a permitted number of times for limiting the number of times of copying to the output information signal, And an information signal output means for outputting the information signal to which the number of permitted duplications has been added. 18. The identification information adding means superimposes the identification information on the information signal as digital watermark information. The duplication permission number adding means converts the duplication permission number into digital watermark information as the digital watermark information. 18. The information signal output device according to claim 17, wherein the information signal output device is superimposed on the information signal. 19. An identification signal for identifying an information signal,
An information signal recording device for receiving an information signal to which a number of permitted duplications for limiting the number of duplications is added and duplicating the information signal on a recording medium, wherein the identification information is obtained from the supplied information signal. Identification information detecting means for detecting the number of permitted duplications from the supplied information signal, the number of permitted duplications detecting means for detecting the number of permitted duplications, the identification information from the identification information detecting means, and the An information signal recording apparatus, comprising: a copy permission count management unit that manages the copy permission count of each information signal in the own device based on the copy permission count. 20. The duplication permission number management means of the information signal recording device, wherein the identification information from the identification information detection means and the duplication number for managing the duplication permission number from the duplication permission number detection means are provided. A memory for storing duplication history information comprising management information; and updating means for updating the duplication count management information of the duplication history information for the information signal as necessary, wherein the information signal recording The apparatus, when performing the duplication of the information signal, based on the duplication history information on the information signal to be duplicated and stored in the memory, based on the duplication control information, it is provided with a duplication control unit that controls the duplication 20. The information signal recording device according to claim 19, wherein: 21. The information according to claim 19, further comprising device identification information adding means for adding device identification information for specifying a recording device to be copied to an information signal to be copied. Signal recording device. 22. Apparatus identification information detecting means for detecting the apparatus identification information added to the duplicated information signal duplicated on the recording medium, and an information signal erasure for erasing the duplicated information signal recorded on the recording medium. Means, the updating means of the information signal recording device, when performing the duplication of the information signal, so as to reduce the number of permitted duplications managed by the duplication number management information for the information signal, When the information signal erasing unit erases the duplicated information signal, and the device identification information detected by the device identification information detecting unit matches device identification information of the information signal recording device. 22. The method according to claim 21, wherein the number of permitted copies managed by the number-of-times-of-copying management information on the already-copied information signal is restored. Placing information signal recording apparatus. 23. A next generation duplication prohibition information adding means for adding information for prohibiting next generation duplication to the information signal recorded on the recording medium, and for prohibiting next generation duplication from the information signal. Next generation copy prohibition information detection means for detecting the information of the information signal when the information for prohibiting the next generation copy is detected by the next generation copy prohibition means. 23. The information signal recording apparatus according to claim 20, wherein duplication is prohibited. 24. The duplication permitted number management means of the information signal recording device, if the duplication permitted number is not detected from the supplied information signal by the duplication permitted number detecting means, the information signal is set to 1 24. The information signal recording apparatus according to claim 19, wherein the number of permitted duplications of the information signal is managed on the assumption that the information signal can be duplicated only once. 25. The identification information and the number of permitted copies are superimposed on the information signal as digital watermark information, and the identification information detecting means is superimposed on the supplied information signal as digital watermark information. Wherein the number of permitted copies is detected by detecting the number of permitted copies superimposed on the supplied information signal as digital watermark information. 20. The information signal recording device according to item 19. 26. The information for prohibiting next-generation duplication is superimposed on the information signal as digital watermark information, and the next-generation duplication prohibition information detecting means adds digital watermark information to the input information signal. 24. The information signal recording apparatus according to claim 23, wherein information for prohibiting duplication of the next generation that is superimposed is detected. 27. Identification information for identifying an information signal;
An information signal recording medium characterized by recording an information signal to which a number of permitted duplications for limiting the number of times of duplication is added. 28. The information signal recording medium according to claim 27, wherein said identification information and said number of permitted copies are superimposed on said information signal as digital watermark information.