JPH1040639A - Digital copy system and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a digital copy of music, etc., from widely spreading over the limits of its private copy and to enable a high quality copy within the limits of the private copy. SOLUTION: At the time of transmitting a reproducing data reproduced from a recording medium by a 1st recording and reproducing unit to a 2nd recording and reproducing unit, an identification code peculiar to this 1st recording and reproducing unit is also transmitted, and hence the reproducing data and the identification code are recorded on a recording medium in the 2nd recording and reproducing unit. Then, at the time of transmitting a reproducing data reproduced from a recording medium by the 2nd recording and reproducing unit to the 1st recording and reproducing unit, only when the identification code in the transmitted data is confirmed to be the same as the identification code set to be peculiar to this 1st recording and reproducing unit, recording operation of the transmitted data to a recording medium is feasible by the 1st recording and reproducing unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a digital copy system composed of devices which can perform digital data communication and copy data, and a recording / reproducing apparatus which is one device of the digital copy system. Things.

[0002]

2. Description of the Related Art Data communication is possible with personal computers and various digital recording / reproducing devices. For example, music works, video works, software programs, and the like can be communicated and digitally copied.

FIG. 5 shows personal computers 50 and 51.
It is an example of a communication mode centering on. The user of the personal computer 50
For example, an MD (mini-disc) recording / reproducing device 5
4. The CD playback device 56 is connected so that digital data communication is possible, and exchange of music data and the like is enabled.

A personal computer 50 has a built-in (or external) CD-ROM driver 52 so that CD-ROM playback data from the CD-ROM driver 52 can be loaded into the personal computer 50. The personal computer 50 is provided with a built-in hard disk drive 50a, and stores various data on the hard disk.

Similarly, the user of the personal computer 51 connects the MD recording / reproducing device 55 and the CD reproducing device 57 to the personal computer 5 so that digital data communication is possible, and enables exchange of music data and the like. -Equipped with a ROM driver 53.
The personal computer 51 has a built-in hard disk drive 51a. The personal computers 50 and 51 can perform data communication with each other by exchanging the Internet, e-mail, or a floppy disk.

In consideration of such an example, the personal computers 50 and 51 are respectively provided with the MD recording / reproducing device 5.
4, 55, digital audio data reproduced from the CD reproducing devices 56, 57
a, 51a. In addition, digital audio data (music) M _DATA can be downloaded from an Internet provider or the like, and can be recorded on the hard disk drives 50a and 51a.

Further, the hard disk drives 50a,
The digital audio data recorded in the
It can also be supplied to the D recording / reproducing devices 54 and 55 for recording on a mini disk (magneto-optical disk). Since these communications are performed in the form of digital data, there is almost no deterioration of music or video data.

[0008]

In such a system, for example, a hard disk built in a personal computer may be used as a music bank. That is, music data (digital audio data) supplied from an MD, a CD, a CD-ROM, the Internet, an e-mail, a floppy disk, or the like is taken into a hard disk. Then, the music data stored in the hard disk is arbitrarily supplied to a device capable of digital audio recording, such as a mini disk, and dubbed to the mini disk. However, considering such a usage pattern, a digital copy with little data deterioration can be freely performed, which causes a problem in copyright management of music and the like.

On the other hand, conventionally, in a DAT (Digital Audio Tape) system or the like, an SCMS (Serial Copy
As known as the Management System) method, only one generation can be digitally copied, so that so-called private duplication rights are secured and music software that is illegal under copyright law is not flooded. . However, considering the use of the hard disk built in the personal computer as the music bank as described above, when the SCMS method is adopted, the copying operation as the music bank becomes impossible. In other words, the digital copy from the hard disk to the mini disk or the like cannot be executed since the first generation digital copy has already been performed at the stage of recording on the hard disk.

[0010]

SUMMARY OF THE INVENTION In view of the above problems, the present invention does not allow digital copies of music and the like to flood widely beyond private copies, and it is highly possible that private copies are in the range of private copies. The purpose is to enable high-quality copying.

Therefore, as a digital copy system,
For example, a first recording / reproducing unit capable of recording and reproducing digital data on a predetermined recording medium such as a mini disk or a DAT, and transmitting / receiving digital data to / from at least the first recording / reproducing unit Recording the digital data supplied from the first recording / reproducing unit on a predetermined recording medium such as a hard disk, and reproducing the digital data from the recording medium and supplying the digital data to the first recording / reproducing unit. It comprises a second recording / reproducing unit that can be used. When the first recording / reproducing unit transmits the reproduction data reproduced from the recording medium to the second recording / reproducing unit, the first recording / reproducing unit also transmits an identification code uniquely set to the first recording / reproducing unit, The reproduced data and the identification code are recorded on the recording medium in the second recording / reproducing unit. Also the second
When the reproduction data reproduced from the recording medium by the recording / reproducing unit is transmitted to the first recording / reproducing unit, the first recording / reproducing unit includes the first recording / reproducing unit in the transmitted data. Only when the same identification code as the identification code uniquely set to the data is confirmed, the recording operation of the transmitted data on the recording medium can be executed.

That is, when the recording medium in the second recording / reproducing unit is used as a music bank or the like,
A digital copy from the recording medium to another recording medium can be executed only by a digital copy in the first recording / reproducing unit used by the user.

As a recording / reproducing apparatus corresponding to the first recording / reproducing unit, a recording / reproducing processing means capable of recording and reproducing digital data on a recording medium such as a mini disk, and an identification unique to the apparatus. Storage means for storing a code, transmission means for generating transmission data by adding an identification code stored in the storage means to data reproduced by the recording / reproduction processing means, and transmitting the data to an external device; Receiving means for receiving the received data and extracting an identification code from the received data; and when the identification code extracted by the receiving means matches the identification code stored in the storage means. only,
Recording control means for permitting the recording / reproducing processing means to perform a recording operation on the recording medium for the data received by the receiving means.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital copy system according to an embodiment of the present invention and a recording / reproducing apparatus corresponding to a first recording / reproducing unit in the digital copy system will be described below.

In this embodiment, the recording / reproducing device corresponding to the first recording / reproducing unit is an MD / CD recording / reproducing device 70 shown by a broken line in FIG. A second copy forming the digital copy system of the present example together with the first recording / reproducing unit.
Is a personal computer 50 having a built-in hard disk drive 50a. The MD / CD recording / reproducing device 70 and the personal computer 50 are connected so that digital audio data can be transmitted and received.

The MD / CD recording / reproducing device 70 is a composite device capable of recording and reproducing music and the like on an MD (mini disk) and reproducing music and the like from a CD (compact disk). is there. This MD / C
FIG. 1 shows the configuration of the D recording / reproducing device 70.

The MD / CD recording / reproducing apparatus 70 can record and reproduce compressed digital audio data with respect to the loaded MD 90. Also, it is possible to reproduce music or the like as digital audio data from the loaded CD 91.

A system controller 1 for controlling the overall operation of the MD / CD recording / reproducing apparatus 70 is formed by a microcomputer. The system controller 1 controls the operation of each unit by a control signal _CNT based on operation information from the operation unit 2 and an internal program, and causes the display unit 3 to execute a required display operation. Operation unit 2
Are composed of various operation keys for the user to instruct a recording operation, a reproducing operation, an access operation, and the like of the CD 91 and the MD 90. Further, a nonvolatile memory 4 is provided so that data which should not be erased even when the power is turned off, such as an identification code described later, can be stored.

The interface processing and encoding / decoding processing section 5 (hereinafter referred to as IF processing section) executes processing for digital audio data communication with the personal computer 50 under the control of the system controller 1. . That is, processing such as transmission data encoding, transmission processing, reception processing, and reception data decoding is performed.

As will be described later, the digital audio data supplied from the personal computer 50 to the IF processing unit 5 can be recorded in the MD 90, and the user inputs an analog audio signal from an arbitrary music source. You can also record it as digital audio data. Further, digital audio data reproduced from the CD 91 can be dubbed and recorded.

A line input terminal 32 and a microphone input terminal 33 are provided for inputting an analog music signal.
The input audio signal from the line input terminal 32 is connected to the resistor R1,
The signal is supplied to the selection / mixing circuit 34 via R2. Further, an input audio signal from the microphone input terminal 33 is supplied to a selection / mixing circuit 34 via a microphone amplifier / AGC circuit 35.

A switch element Q is connected between the resistance parts R1 and R2, and the switch element Q is turned on / off by a control signal _CNT from the system controller 1. When the switch element Q is turned on, the input audio signal from the line input terminal 32 is not supplied to the selection / mixing circuit 34.
That is, when the system controller 1 is unnecessary, the input audio signal from the line input terminal 32 can be muted.

The selection / mixing circuit 34 has a line input terminal 3
2. Select or mix audio signals from the microphone input terminal 33 and output them. For example, when an audio signal is supplied from both the line input terminal 32 and the microphone input terminal 33, one of them can be selected and output, or they can be mixed and output.

The output of the selection / mixing circuit 34 is supplied to a T _IN terminal of the output switch 27 and an AGC / level adjusting circuit 36. The output of the output switch 27 is the volume control circuit 2
8. The signal is supplied to the speaker 30 or the headphone output terminal 31 via the amplifier circuit 29, and is output as sound.
Therefore, when the T _IN terminal is selected by the output switch 27, the line input terminal 32 or the microphone input terminal 33
Is output from the speaker 30 or the headphone output terminal 31.

The loaded CD 91 is rotated by a spindle motor 21 at a constant linear velocity (CLV). The optical head 22 irradiates a laser beam to the rotating CD 91 and detects the reflected light to thereby produce the CD 9.
1 is read out from the pits and supplied to the RF amplifier 23. Servo signal processor 24
Generates various servo signals of focus, tracking, sled, and spindle from the output of the RF amplifier 23, and executes the servo operation.

The decoder 25 performs EFM demodulation on the reflected light amount information (reproduced RF signal) read from the CD 91,
Perform CIRC decoding, etc., and perform 16-bit quantization, 4
Decodes to 4.1KHz sampling digital audio data format. The digital audio data output from the decoder 25 is converted into an analog audio signal by the D / A converter 26 and supplied to the _TCD terminal of the output switch 27.
Since the TCD terminal is selected for the output switch 27 during CD reproduction, the reproduced audio signal from the _CD 91 is output from the volume control circuit 2.
8. The signal is supplied to the speaker 30 or the headphone output terminal 31 via the amplifier circuit 29, and is output as sound.

The loaded MD 90 is rotated at a constant linear velocity (CLV) by the spindle motor 11 during recording and reproduction. The optical head 12 reads data recorded as pits or magnetic field information from the MD 91 that is rotationally driven, and supplies the data to the RF amplifier 13. The servo signal processor 14 generates various servo signals of focus, tracking, thread, and spindle from the output of the RF amplifier 13 to execute a servo operation.

The encoder / decoder 15 performs processing such as EFM demodulation and ACIRC decoding during MD reproduction. The data decoded by the encoder / decoder 15 is temporarily stored in a buffer memory 17 via a memory controller 16. The audio data is read out at a predetermined timing, and is decoded by the audio compression encoder / decoder 18 for the audio compression process (modified DCT process).
Bit quantized, 44.1KHz sampling digital audio data.

The digital audio data output from the audio compression encoder / decoder 18 is converted to a D / A converter 19
And is supplied to the _TMD terminal of the output switch 27. During MD playback, the output switch 27 is set to T
_{Since the MD} terminal is selected, the reproduced audio signal from the MD 90 is transmitted to the speaker 3 via the volume control circuit 28 and the amplifier circuit 29.
0 or the signal is supplied to the headphone output terminal 31 and is output as sound.

For the MD 90, a line input terminal 32,
Recording can be performed using the microphone input terminal 33 and the CD 91 as signal sources. The audio signal from the line input terminal 32 or the microphone input terminal 33 is mixed with the mixing / selection circuit 3
4. The digital audio data is supplied to an A / D converter 37 via an AGC / level adjustment circuit 36, and is converted into digital audio data of 16-bit quantization and 44.1 KHz sampling. The digital audio data is supplied to the audio compression encoder / decoder 18. Also, C
The digital audio data reproduced from D91, that is, the output of the decoder 25 is also supplied to the audio compression encoder / decoder 18.

The audio compression encoder / decoder 18 applies a modified DCT to the supplied digital audio data.
Processing is performed to compress the data amount to about 1/5. Then, the compressed data is temporarily written to the buffer memory 17 by the memory controller 16. Each time a predetermined amount of data is accumulated, the data is read out and supplied to the encoder / decoder 15. The encoder / decoder 15 performs ACIRC encoding and EFM modulation on the supplied data to generate recording data, and supplies the recording data to the magnetic head unit 20.

At the time of recording, the optical head 12 continuously irradiates the disk surface of the MD 90 with laser light at a high power to raise the irradiated portion to the Curie temperature. At this time, the magnetic head unit 20 disposed at the position facing the
Alternatively, when an S magnetic field is applied, the N / S information is recorded on the disk. Therefore, the magnetic head unit 20 applies the magnetic field of N or S according to the recording data, so that the audio data is recorded on the MD 90.

The digital audio data reproduced from the MD 90 and the CD 91 can be transmitted to the personal computer 50 via the IF processing unit 5. For this reason, with respect to the reproduction data from the MD 90, the data read from the buffer memory 17, that is, the digital audio data in a state where the audio compression processing has been performed is supplied to the IF processing unit 5. . The decoder 25 and the encoder / decoder 15
Is connected to a digital audio interface, so that digital audio data as reproduction data from the CD 91 can be supplied to the IF processing unit 5 at the stage when the digital audio data is read from the buffer memory 17.

The IF processing unit 5 encodes digital audio data to be transmitted, generates transmission data, and transmits the transmission data to the personal computer 50 in the form of digital data. In the personal computer 50, the transmission data can be directly recorded on the hard disk in the hard disk drive 50a. That is, digital audio data as music can be copied.

When digital audio data is transmitted from the personal computer 50, the IF processing section 5 receives and decodes the digital audio data, and supplies the decoded audio data (audio compression processing data) to the buffer memory 17. it can. Then, the digital audio data is encoded by the encoder / decoder 15, and then supplied to the magnetic head unit 20 as recording data, and is recorded on the MD 90.

Note that the personal computers 50 to 1
When 6-bit quantized, 44.1 KHz sampling digital audio data that has not been subjected to compression processing is supplied, the IF processing unit 5 supplies the received and decoded data to the audio compression encoder / decoder 18 to perform audio compression processing. After that, the data is accumulated in the buffer memory 17.

As described above, the MD / CD recording / reproducing apparatus 70 can copy digital audio data as music supplied from the personal computer 50 to the MD 90.

According to the MD / CD recording / reproducing device 70 and the personal computer 50, the hard disk of the personal computer 50 can be used as a music bank.

That is, first, the MD / CD recording / reproducing device 70
And reproduces the MD 90, and transmits the digital audio data at the time of the audio compression from the IF processing unit 5 to the personal computer 50. In the personal computer 50, the transmitted digital audio data is recorded in the hard disk drive 50a as one file in track (song) units. By repeating such an operation, the hard disk of the personal computer 50 has a state in which a large number of songs are stored as file data.

The user can select one of the files (songs) stored on the hard disk at any time as necessary.
Alternatively, a plurality of files are selected and transmitted from the personal computer 50 to the MD / CD recording / reproducing device 70. Then, the MD / CD recording / reproducing device 70 is loaded with, for example, an MD 90 which is a virgin disk on which nothing is recorded, and instructs execution of a recording operation. Then, the digital audio data transmitted from the personal computer 50 is digitally copied and recorded on the MD 90, thereby making it possible to create the MD 90 in which music desired by the user is collected. Of course, it is also possible to perform digital editing on the MD 90 after adding various editing processes to the music data on the personal computer 50 side.

Then, both copying from the MD90 to the hard disk, copying from the hard disk to the MD90,
Since the compression is performed in the form of digital data in the audio compression processing stage, there is almost no deterioration in sound quality and the like, and high-quality audio data can be maintained. In particular, since the data that has been compressed is transferred, it depends on the recording / reproducing speed of the MD 90, the degree of data compression, and the like.
Copying can be completed twice as fast.

However, if such a digital copy operation is not restricted at all, there is a danger that an illegal copy disc will be created beyond private copy when considering various communication forms as shown in FIG. 5, for example. is there. Accordingly, in this example, the MD / CD recording / reproducing device 70 uses the MD 90 (or C
D91) in the case of digital copying to the hard disk of the personal computer 50, and in the case of digital copying from the hard disk of the personal computer 50 to the MD90 of the MD / CD recording / reproducing device 70, the operation described below is performed to achieve high quality. Ensure that digital copies are made only within private duplication.

First, an identification code unique to the MD / CD recording / reproducing device 70 is set in advance at the time of manufacture, and is stored in the nonvolatile memory 4. The identification code may be coded by combining, for example, a maker name, a model name, and a production number (serial number) for each device. Of course, other contents such as a production place code and a production date may be added. In any case, the identification code is a code individually given to each device.

The MD / CD recording / reproducing device 70 uses the MD 90
FIG. 2 shows a transmission data image when digital audio data reproduced from the CD (or CD 91) is transmitted to the personal computer 50 and digitally copied to a hard disk. The IF processing unit 5 is supplied with digital audio data that has been reproduced from the MD 90, decoded by the encoder / decoder unit 15, and subjected to audio compression processing via the buffer memory 17. At this time, the system controller 1 reads the identification code from the nonvolatile memory 4 and supplies it to the IF processing unit 5.

In the IF processing section 5, encoding processing includes
The audio compressed digital audio data continuously supplied from the buffer memory 17 is packetized for each predetermined amount of data units (N samples) as shown in FIG. Then, by adding each packet data, the identification code supplied from the system controller 1 and the sync pattern, a continuous data stream is formed in units of one pack as shown in FIG. 2B. And this FIG. 2 (b)
A data stream such as
The output is transmitted for 0.

Such data is directly copied to the hard disk of the personal computer 50. Digital audio data recorded as a file on the hard disk includes, for example, a very small audio unit (for example, a pack data unit). Number to number 1
(Approximately 00 ms).

It is to be noted that the identification code may be added to at least the digital audio data without taking the pack form as shown in FIG. 2B. For example, in a mini disk system, there is a data portion in which actual audio information is not recorded, such as a linking sector. However, an identification code may be assigned to the timing of such an area and transmitted. CD9
Similarly, the identification code may be added when transmitting one piece of reproduction data.

The operation for digital copying from the hard disk of the personal computer 50 to the MD 90 of the MD / CD recording / reproducing apparatus 70 is as follows. FIG. 3 shows the processing of the system controller 1 at this time.
Shows an image of the decoding operation in the IF processing unit 5.

When the personal computer 50 executes the operation of reproducing the file (song) requested by the hard disk drive 50a and transmits it to the MD / CD recording / reproducing apparatus 70, the IF processing section 5 stores the data as shown in FIG. A stream will be provided.

At this time, the MD / CD recording / reproducing apparatus 70 performs the recording operation of the received digital audio data on the MD 90. During the recording, the system controller 1 and the IF processing unit 5 perform the processing shown in FIG. Is performed.

First, as a dubbing start, reception of a transmission from the personal computer 50 and recording operation on the MD 90 are started, but sync detection is performed in step F101 as decoding processing in the IF processing unit 5. By detecting the sync of the transmitted data, one unit as pack data is grasped, and based on this, a decoding process is performed in step F102. By this decoding process, the identification code added to the pack data is separated and supplied to the system controller 1 as shown in FIGS. 4A and 4B, and the digital audio from which the sync and the identification code have been removed. Data is obtained.

The system controller 1 proceeds to step F103
Then, the identification code separated and extracted from the received data is compared with the identification code stored in the nonvolatile memory 4.
And if it is determined that they match, from step F104
Proceed to F105, and supply the decoded digital audio data to the buffer memory 17 as shown in FIG.
Hereinafter, the recording process to the MD 90 is provided. During dubbing by digital copying, the processing of steps F101 to F105 is continued.

If the identification code added to the digital audio data transmitted from the personal computer 50 does not match the identification code of the MD / CD recording / reproducing device 70, a negative result is obtained in step F104, Proceed to step F106. Then, the system controller 1 stops the recording operation on the MD 90.

With the above-described processing, the MD / CD recording / reproducing device 70 converts the digital audio data transmitted from the personal computer 50 into the MD90.
The digital copy can be performed only when the MD / CD recording / reproducing device 70 has a unique identification code. The digital audio data to which the identification code unique to the MD / CD recording / reproducing device 70 is added is originally MD9
0 (or CD 91) and digitally copied to the hard disk of the personal computer 50.

In other words, this is limited to digital copying when the hard disk is used as a music bank in order for the user to make private copies and enjoy music and the like. It will not be copied unnecessarily.

That is, even if the music data reproduced from the hard disk drive 50a in FIG. 5 is distributed by the Internet, e-mail, floppy disk, or the like and stored in the hard disk drive 51a of another personal computer 51, the hard disk drive 51a Cannot be transferred to the MD recording / reproducing device 55 and digitally copied to the MD. Also a personal computer 5
Even if another recording device is connected to the recording device 0, digital copying cannot be performed.

Furthermore, since the MD / CD recording / reproducing apparatus 70 adopts the SCMS method, the SCMS flag is set at the stage when digital copying is performed from the hard disk of the personal computer 50 to the MD 90, and the subsequent generations are set. Digital copying of is prohibited. Therefore, the MD 91 created by digital copying cannot be used for anything other than personal enjoyment, for example, for producing a copy as a digital audio data source.

As can be seen from FIG. 2, an identification code is added for each pack data.
Considering a song, the identification code exists at intervals of about several milliseconds to several hundred milliseconds. Then, for example, a case where digital audio data editing processing and the like are performed in the personal computer 50 and a file of one new music piece is generated by being combined with digital audio data copied from another source, for example, may be considered. Since the process of repeatedly confirming the identification code is performed as shown in FIG. 3, the MD / CD recording / reproducing device 9 is merely used.
Only the audio data portion digitally copied from 0 can be recorded. That is, digital copying cannot be performed for a portion that may exceed private copying.

As can be seen from the above, in this example, high-quality data copying can be performed at high speed with respect to private copying, and there is a possibility that the copying operation may exceed the range of private copying. In some cases, the copying operation is prohibited, and a digital copy system preferable for both the user and the author can be constructed.

The present invention is not limited to the configuration and operation of the above example, and it goes without saying that various modifications are possible. In the above example, a digital copy system using an MD / CD recording / reproducing device and a personal computer has been described, but other digital recording / reproducing devices such as a DAT recording / reproducing device and a DVD (digital video disk) recording / reproducing device also constitute the system. The target of the unit.

The present invention can also be applied to the provision of music from a provider to general users by communication such as the Internet. That is, the provider inserts, for example, an identification code of a recording device used by a specific user who has contracted,
Music or the like is transmitted to the user's personal computer in the data form as described above, and downloaded to the hard disk. Then, only the specific user can digitally copy the music or the like to a mini-disc or the like, and a form of providing music or the like through communication can be realized.

[0062]

As described above, according to the present invention, the first recording / reproducing unit transmits the reproduced data reproduced from the recording medium to the second recording / reproducing unit. Is also transmitted, so that the second recording / reproducing unit records the reproduced data and the identification code on the recording medium. When the reproduction data reproduced from the recording medium by the second recording / reproducing unit is transmitted to the first recording / reproducing unit,
Recording / reproducing unit records the transmitted data only when the same identification code as the identification code uniquely set to the first recording / reproducing unit is confirmed in the transmitted data. The recording operation on the medium can be executed. Therefore, in the first recording / reproducing unit, the second recording / reproducing unit is not used.
The data transmitted to the recording / reproduction unit and digitally copied can be digitally copied from the second recording / reproduction unit. In other words, high-quality and high-speed copying can be performed for digital copying as private copying, and digital copying that may exceed the scope of private copying cannot be performed. There is an effect that a digital copy system preferable for both can be constructed.

[Brief description of the drawings]

FIG. 1 is a block diagram of an MD / CD recording / playback apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a transmission encoding process from the MD / CD recording / reproducing device of the embodiment.

FIG. 3 is a flowchart of a process at the time of copying received data in the MD / CD recording / reproducing apparatus of the embodiment.

FIG. 4 is an explanatory diagram of a reception decoding process in the MD / CD recording / reproducing device of the embodiment.

FIG. 5 is an explanatory diagram of an example of a system configuration capable of performing digital data communication.

[Explanation of symbols]

1 System controller, 4 Non-volatile memory, 5
IF processing unit, 12 optical head, 15 encoder / decoder unit, 16 memory controller, 17 buffer memory, 18 audio compression encoder / decoder unit, 20
Magnetic head, 50 personal computer, 50a
Hard disk drive, 70 MD / CD recording / reproducing device, 90 MD, 91 CD

Claims (3)

[Claims] 1. A first recording / reproducing unit capable of recording and reproducing digital data on and from a predetermined recording medium, and transmitting / receiving digital data to / from at least the first recording / reproducing unit. A second recording / reproducing unit that records digital data supplied from the first recording / reproducing unit on a predetermined recording medium, reproduces the digital data from the recording medium, and supplies the digital data to the first recording / reproducing unit. The first recording / reproducing unit is configured to be unique to the first recording / reproducing unit when transmitting reproduction data reproduced from a recording medium to the second recording / reproducing unit. The second recording / reproducing unit transmits the reproduced data and the identification code to a recording medium. When the reproduced data reproduced from the recording medium by the second recording / reproducing unit is transmitted to the first recording / reproducing unit, the first recording / reproducing unit transmits the reproduced data within the transmitted data. The recording operation of the transmitted data on the recording medium can be executed only when the same identification code as the identification code uniquely set to the first recording / reproducing unit is confirmed. Digital copy system. 2. The recording / reproducing unit according to claim 1, wherein the first recording / reproducing unit is configured to store an identification code set uniquely for the first recording / reproducing unit, an identification code included in transmitted data, 2. The digital device according to claim 1, further comprising a recording control unit that enables an operation of recording transmitted data on a recording medium when the identification codes stored in the storage unit match. Copy system. 3. A recording / reproducing processing means capable of recording and reproducing digital data on and from a recording medium, a storing means for storing an identification code unique to the apparatus, and a recording / reproducing processing means for reproducing the data. Transmitting means for generating transmission data by adding the identification code stored in the storage means to the received data, transmitting the data to an external device, and receiving the data transmitted from the external device, Receiving means capable of extracting an identification code from the receiving means, and only when the identification code extracted by the receiving means matches the identification code stored in the storage means, A recording control means for permitting a recording operation on a recording medium by the recording / reproduction processing means.