JP3684696B2 - Digital copy system, recording / reproducing apparatus, and recording / reproducing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a digital copy system configured between devices capable of performing digital data communication and data copying, and a recording / reproducing apparatus serving as one device of the digital copy system, And recording / reproducing methodIt is about.
[0002]
[Prior art]
Data communication is possible with personal computers and various digital recording / playback devices. For example, music works, video works, software programs, etc. can be communicated and digitally copied.
[0003]
FIG. 5 shows an example of a communication form centered on the personal computers 50 and 51. A user of the personal computer 50 connects, for example, an MD (mini disk) recording / reproducing device 54 and a CD reproducing device 56 to the personal computer 50 so as to be able to communicate digital data, thereby enabling exchange of music data and the like.
[0004]
The personal computer 50 is provided with a built-in (or external) CD-ROM driver 52 so that CD-ROM reproduction 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 various data are stored in the hard disk.
[0005]
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 as to be able to communicate digital data so that music data can be exchanged and a CD-ROM driver. Equipped with 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 through the Internet, e-mail, floppy disk exchange, or the like.
[0006]
Considering such an example, the personal computers 50 and 51 can record the digital audio data reproduced from the MD recording / reproducing devices 54 and 55 and the CD reproducing devices 56 and 57, respectively, on the hard disk drives 50a and 51a. Digital audio data (music) M from Internet providers_DATACan be downloaded and recorded in the hard disk drives 50a and 51a.
[0007]
Further, the digital audio data recorded in the hard disk drives 50a and 51a can be supplied to the MD recording / reproducing devices 54 and 55 and recorded 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]
[Problems to be solved by the invention]
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 MD, CD, CD-ROM, Internet, e-mail, floppy disk or the like is taken into the hard disk. 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, digital copying with little data deterioration is performed freely, which causes a problem in copyright management of music and the like.
[0009]
On the other hand, in DAT (digital audio tape) systems and the like, as known as the SCMS (Serial Copy Management System) method, only one generation can be digitally copied, so-called private copying rights are secured. The music software that is illegal under the copyright law is not flooded. However, considering the form in which a hard disk built in a personal computer is used as a music bank as described above, when the SCMS method is adopted, a copy operation as a music bank becomes impossible. That is, since the first generation digital copy has already been performed at the stage of recording on the hard disk, the digital copy from the hard disk to a mini disk or the like cannot be executed.
[0010]
[Means for Solving the Problems]
In view of such problems, the present invention does not allow a digital copy of music or the like to overflow beyond private duplication, and enables high-quality copying within the scope of private duplication. Objective.
[0011]
  Therefore, as a digital copy system, for example, a first recording / reproducing unit capable of recording and reproducing digital data with respect to a predetermined recording medium such as a mini disk or DAT, and at least the first recording / reproducing unit Digital data can be transmitted to and received from the first recording / reproducing unit.Read from the first recording medium,The supplied digital dataSecondRecorded on a recording medium, andThe secondIt comprises a second recording / reproducing unit capable of reproducing digital data from a recording medium and supplying it to the first recording / reproducing unit.
  And the first recording / reproducing unit comprises:The firstWhen transmitting reproduction data reproduced from a recording medium to the second recording / reproducing unit,TheAn identification code set uniquely for the first recording / reproducing unit is also transmitted, and the reproduction data and the identification code are transmitted in the second recording / reproducing unit.The secondIn addition to being recorded on a recording medium, the second recording / reproducing unitThe secondTransmits reproduction data reproduced from the recording medium to the first recording / reproducing unit.DoIn the first recording / reproducing unit, in the transmitted data,TheOnly when the same identification code as the identification code uniquely set in the first recording / reproducing unit is confirmed, the transmitted dataThirdThe recording operation to the recording medium can be executed.
[0012]
That is, when the recording medium in the second recording / reproducing unit is used as a music bank or the like, the first recording used by the user can be digitally copied from the recording medium to another recording medium. Limited to digital copy on playback unit.
[0013]
  As a recording / reproducing apparatus corresponding to the first recording / reproducing unit, recording / reproducing means capable of recording and reproducing digital data with respect to a recording medium such as a mini-disc, and the present recording / reproducing apparatusofA storage means for storing a unique identification code, and the recording / playback meansRegenerationThe transmission unit generates the transmission data by adding the identification code stored in the storage unit to the data, transmits the data to the external device, and receives and transmits the data transmitted from the external device.TheReceiving means capable of extracting an identification code from the data, and extracted by the receiving meansSaidIdentifying codeWhenStored in the storage meansSpecificIdentification code andCompare the twoReceived by the receiving means only when they matchSaidRecording control means for permitting the recording operation of the data on the recording medium by the recording / reproducing means.
  Further, as a recording / reproducing method, the compressed digital data is reproduced from the recording medium by the recording / reproducing means, and the transmission data is added to the compressed digital data by adding a unique identification code of the recording / reproducing apparatus having the recording / reproducing means. Generating, transmitting to an external device, receiving data transmitted from the external device, extracting compressed digital data and an identification code from the received data, extracting the extracted identification code, and recording / reproducing The unique identification code of the apparatus is compared, and only when the two match, the recording operation of the extracted compressed digital data on the recording medium by the recording / reproducing means is permitted.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A digital copy system as 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.
[0015]
In this example, the recording / reproducing apparatus corresponding to the first recording / reproducing unit is assumed to be an MD / CD recording / reproducing apparatus 70 indicated by a broken line in FIG. The second recording / reproducing unit that forms the digital copy system of this example together with the first recording / reproducing unit is assumed to be a personal computer 50 incorporating a hard disk drive 50a. The MD / CD recording / reproducing apparatus 70 and the personal computer 50 are connected so that digital audio data can be transmitted and received.
[0016]
The MD / CD recording / reproducing apparatus 70 is a composite device that can record and reproduce music on an MD (mini disk) and can reproduce music from a CD (compact disk).
The configuration of the MD / CD recording / reproducing apparatus 70 is shown in FIG.
[0017]
The MD / CD recording / reproducing apparatus 70 can record and reproduce digital audio data compressed with respect to the loaded MD 90. In addition, music or the like as digital audio data can be reproduced from the loaded CD 91.
[0018]
The system controller 1 that controls the entire operation of the MD / CD recording / reproducing apparatus 70 is formed by a microcomputer. The system controller 1 controls the control signal C based on the operation information from the operation unit 2 and the internal program._NTThus, the operation of each unit is controlled, and the display unit 3 is caused to execute a required display operation. The operation unit 2 includes various operation keys for the user to instruct recording operation, reproduction operation, access operation, and the like of the CD 91 and MD 90.
Further, a nonvolatile memory 4 is provided so that data that should not be erased even when the power is turned off, such as an identification code to be described later, can be stored.
[0019]
The interface processing and encoding / decoding processing unit 5 (hereinafter referred to as IF processing unit) executes processing for digital audio data communication with the personal computer 50 based on 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.
[0020]
As will be described later, the digital audio data supplied from the personal computer 50 to the IF processing unit 5 can be recorded on the MD 90, and the user inputs an analog audio signal from an arbitrary music source. Can be recorded as digital audio data. Further, digital audio data reproduced from the CD 91 can be dubbed and recorded.
[0021]
A line input terminal 32 and a microphone input terminal 33 are provided for inputting analog music signals. The input audio signal from the line input terminal 32 is supplied to the selection / mixing circuit 34 via the resistance parts R1 and R2. Further, the input audio signal from the microphone input terminal 33 is supplied to the selection / mixing circuit 34 via the microphone amplifier / AGC circuit 35.
[0022]
A switch element Q is connected between the resistance parts R1 and R2, and the switch element Q is connected to the control signal C from the system controller 1._NTIs turned on / off. 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.
[0023]
The selection / mixing circuit 34 selects or mixes the audio signals from the line input terminal 32 and the microphone input terminal 33 and outputs them. For example, when audio signals are supplied from both the line input terminal 32 and the microphone input terminal 33, one can be selected and output, or they can be mixed and output.
[0024]
The output of the selection / mixing circuit 34 is the T of the output switch 27._INTerminal and the AGC / level adjustment circuit 36.
The output of the output switch 27 is supplied to the speaker 30 or the headphone output terminal 31 via the volume control circuit 28 and the amplifier circuit 29, and is output as sound. Therefore, the output switch 27_INWhen the terminal is selected, an audio signal from the line input terminal 32 or the microphone input terminal 33 is output from the speaker 30 or the headphone output terminal 31.
[0025]
The loaded CD 91 is rotationally driven by the spindle motor 21 at a constant linear velocity (CLV). The optical head 22 performs laser irradiation on the rotating CD 91 and detects the reflected light, thereby reading out data recorded in the pits on the CD 91 and supplying the data to the RF amplifier 23. The servo signal processor 24 generates various servo signals for focus, tracking, sled, and spindle from the output of the RF amplifier 23 and executes the servo operation.
[0026]
The decoder 25 performs EFM demodulation, CIRC decoding, and the like on the reflected light amount information (reproduced RF signal) read from the CD 91, and decodes the digital audio data in the form of 16-bit quantization and 44.1KHz sampling.
The digital audio data output from the decoder 25 is converted into an analog audio signal by the D / A converter 26, and the output switch 27 T_CDSupplied to the terminal. The output switch 27 is set to T during CD playback._CDSince the terminal is selected, the reproduced audio signal from the CD 91 is supplied to the speaker 30 or the headphone output terminal 31 via the volume adjusting circuit 28 and the amplifying circuit 29 and output as audio.
[0027]
The loaded MD 90 is driven to rotate at a constant linear velocity (CLV) by the spindle motor 11 during recording and reproduction. The optical head 12 reads out data recorded as pit 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 for focus, tracking, sled, and spindle from the output of the RF amplifier 13 and executes the servo operation.
[0028]
The encoder / decoder 15 performs processing such as EFM demodulation and ACIRC decoding during MD reproduction. Data decoded by the encoder / decoder 15 is temporarily stored in the buffer memory 17 via the memory controller 16. The data is read out at a predetermined timing, and the audio compression encoder / decoder 18 decodes the audio compression processing (modified DCT processing) to obtain digital audio data of 16-bit quantization and 44.1 KHz sampling.
[0029]
The digital audio data output from the audio compression encoder / decoder 18 is converted into an analog audio signal by the D / A converter 19, and the output switch 27 T_MDSupplied to the terminal. During MD playback, the output switch 27 is set to T_MDSince the terminal is selected, the reproduced audio signal from the MD 90 is supplied to the speaker 30 or the headphone output terminal 31 via the volume adjustment circuit 28 and the amplification circuit 29 and is output as audio.
[0030]
For the MD 90, recording can be performed using the line input terminal 32, 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 supplied to the A / D converter 37 via the mixing / selection circuit 34 and the AGC / level adjustment circuit 36, and is digital audio of 16-bit quantization and 44.1 KHz sampling. Data. The digital audio data is supplied to the audio compression encoder / decoder 18.
The digital audio data reproduced from the CD 91, that is, the output of the decoder 25 can also be supplied to the audio compression encoder / decoder 18.
[0031]
The audio compression encoder / decoder 18 performs a modified DCT process on the supplied digital audio data to compress the data amount to about 1/5. The compressed data is once written in the buffer memory 17 by the memory controller 16. Each time a predetermined amount of data is stored, the data is read and supplied to the encoder / decoder 15. The encoder / decoder 15 performs ACIRC encoding and EFM modulation on the supplied data, generates recording data, and supplies it to the magnetic head unit 20.
[0032]
At the time of recording, the optical head 12 continuously irradiates the disk surface of the MD90 with laser light at a high power to raise the irradiated portion to the Curie temperature. At this time, when the magnetic head unit 20 disposed at the opposing position applies an N or S magnetic field, the N / S information is recorded on the disk. Therefore, the magnetic head unit 20 applies the N or S magnetic field according to the recording data, so that the audio data is recorded on the MD 90.
[0033]
Incidentally, 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 is performed is supplied to the IF processing unit 5. .
The decoder 25 and the encoder / decoder 15 are connected to a digital audio interface so that digital audio data as reproduction data from the CD 91 can also be supplied to the IF processing unit 5 when it is read from the buffer memory 17. I have to.
[0034]
The IF processing unit 5 encodes the digital audio data to be transmitted, generates transmission data, and transmits it to the personal computer 50 in the form of digital data. In the personal computer 50, the transmission data can be recorded as it is on the hard disk in the hard disk drive 50a. That is, digital audio data as music can be copied.
[0035]
When digital audio data is transmitted from the personal computer 50, the IF processing unit 5 can receive and decode the digital audio data and supply the decoded audio data (audio compression processing data) to the buffer memory 17. The digital audio data is encoded by the encoder / decoder 15, supplied to the magnetic head unit 20 as recording data, and recorded on the MD 90.
[0036]
When digital audio data that has not been subjected to compression processing of 16-bit quantization and 44.1 kHz sampling is supplied from the personal computer 50, the IF processing unit 5 supplies the received and decoded data to the audio compression encoder / decoder 18. Then, after the audio compression process is performed, the data is stored in the buffer memory 17.
[0037]
As described above, the MD / CD recording / reproducing apparatus 70 can copy the digital audio data as music supplied from the personal computer 50 to the MD 90.
[0038]
According to such an MD / CD recording / reproducing apparatus 70 and the personal computer 50, the hard disk of the personal computer 50 can be used as a music bank.
[0039]
That is, first, the MD / CD recording / reproducing apparatus 70 performs the reproducing operation of the MD 90, and the digital audio data at the time when the sound is compressed is transmitted 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 units of tracks (music pieces).
By repeating such an operation, a large number of music pieces are stored as file data in the hard disk of the personal computer 50, respectively.
[0040]
The user selects one or a plurality of files from files (songs) stored in the hard disk at an arbitrary time as required, and transmits the selected files from the personal computer 50 to the MD / CD recording / reproducing apparatus 70. Then, the MD / CD recording / reproducing apparatus 70 is loaded with, for example, an MD 90 which is a virgin disc on which nothing is recorded, and an instruction to execute a recording operation is given. Then, the digital audio data transmitted from the personal computer 50 is digitally copied and recorded on the MD 90, thereby creating the MD 90 in which the songs desired by the user are collected.
Of course, the music data can be digitally copied to the MD 90 after each editing process is performed on the music data on the personal computer 50 side.
[0041]
Since copying from the MD 90 to the hard disk and copying from the hard disk to the MD 90 are performed in the form of digital data in the audio compression processing stage, there is almost no deterioration in sound quality or the like, and high-quality audio data can be maintained. In addition, since data that has undergone compression processing is transferred, copying can be completed at a speed as high as several tens of times the normal music playback speed, depending on the recording / playback speed of MD90 and the data compression rate. .
[0042]
However, if there is no restriction on the digital copy operation, there is a risk that an illegal copy disc may be created beyond private duplication when considering various communication modes as shown in FIG.
Therefore, in this example, when digitally copying from the MD90 (or CD91) in the MD / CD recording / reproducing apparatus 70 to the hard disk of the personal computer 50, and from the hard disk of the personal computer 50 to the MD90 of the MD / CD recording / reproducing apparatus 70 In each case, an operation described below is performed so that high-quality digital copying is performed only within the scope of private copying.
[0043]
First, the MD / CD recording / reproducing apparatus 70 is set in advance with an identification code unique to the apparatus at the time of manufacture and stored in the nonvolatile memory 4. The identification code may be coded by synthesizing, for example, a manufacturer name, a model name, and a manufacturing number (serial number) for each device. Of course, other contents such as a manufacturing place code and a manufacturing date may be added. In any case, the identification code is a code given to each device individually.
[0044]
FIG. 2 shows a transmission data image when digital audio data reproduced from the MD 90 (or CD 91) by the MD / CD recording / reproducing apparatus 70 is transmitted to the personal computer 50 and digitally copied to the hard disk.
The IF processing unit 5 is supplied with digital audio data that is 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.
[0045]
As an encoding process, the IF processing unit 5 packetizes audio compressed digital audio data continuously supplied from the buffer memory 17 for each predetermined amount of data units (N samples) as shown in FIG. To do. Then, each packet data, an identification code supplied from the system controller 1 and a sync pattern are added to form a continuous data stream in units of one pack as shown in FIG.
Then, the data stream as shown in FIG. 2B is transmitted and output to the personal computer 50.
[0046]
Such data is copied to the hard disk of the personal computer 50 as it is. However, in the digital audio data recorded as a file on the hard disk, for example, a rather fine audio unit (for example, several to several) is used as a pack data unit. An identification code is added every 100 milliseconds).
[0047]
Note that the identification code may be added to at least the digital audio data without necessarily taking the pack form as shown in FIG. For example, in a mini-disc system, there is a data portion where actual audio information is not recorded, such as a linking sector, but an identification code may be assigned to the timing of such an area and transmitted.
An identification code may be added in the same manner when CD 91 reproduction data is transmitted.
[0048]
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 processing of the system controller 1 at this time, and FIG. 4 shows an image of decoding operation in the IF processing unit 5.
[0049]
When the personal computer 50 executes the reproduction operation of the requested file (song) in the hard disk drive 50a and transmits it to the MD / CD recording / reproducing apparatus 70, the data stream as shown in FIG. Will be.
[0050]
At this time, the MD / CD recording / reproducing apparatus 70 performs a 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 of FIG. .
[0051]
First, as a dubbing start, reception of transmission from the personal computer 50 and recording operation to 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, decoding processing is performed in step F102.
By this decoding process, as shown in FIGS. 4A and 4B, the identification code added to the pack data is separated and supplied to the system controller 1, and the digital audio from which the sync and identification code are removed Data is obtained.
[0052]
In step F103, the system controller 1 compares the identification code separated and extracted from the received data with the identification code stored in the nonvolatile memory 4.
If it is determined that they match, the process proceeds from step F104 to F105, where the decoded digital audio data as shown in FIG. 4B is supplied to the buffer memory 17, and is then used for recording processing to the MD90. During dubbing by digital copy, the processing of steps F101 to F105 is continued.
[0053]
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 apparatus 70, a negative result is obtained in step F104, and the process returns to step F106. move on. Then, the system controller 1 stops the recording operation to the MD90.
[0054]
With the above processing, the digital audio data transmitted from the personal computer 50 can be digitally copied to the MD 90 by the MD / CD recording / reproducing apparatus 70 because an identification code unique to the MD / CD recording / reproducing apparatus 70 is used. Only when it is added. The digital audio data to which a unique identification code is added to the MD / CD recording / reproducing apparatus 70 is originally reproduced from the MD 90 (or CD 91) by the MD / CD recording / reproducing apparatus 70 and digitally recorded on the hard disk of the personal computer 50. The copied data.
[0055]
In other words, this is limited to digital copying when the hard disk is used as a music bank in order to allow users to make private copies and enjoy music, etc. The music data filed on the hard disk is copied unnecessarily. It will never be done.
[0056]
That is, even if the music data reproduced from the hard disk drive 50a in FIG. 5 is distributed via the Internet, e-mail, floppy disk or the like and stored in the hard disk drive 51a of another personal computer 51, the music data is reproduced from the hard disk drive 51a. The music data cannot be transferred to the MD recording / reproducing device 55 and digitally copied to the MD. Even if another recording device is connected to the personal computer 50, digital copying cannot be performed.
[0057]
Furthermore, since the MD / CD recording / reproducing apparatus 70 adopts the SCMS method, the SCMS flag is set when the digital copy is performed from the hard disk of the personal computer 50 to the MD 90, and the digital copy of the subsequent generation is made. Is prohibited. Therefore, the MD 91 created by digital copy cannot be used for manufacturing a duplicate product as a digital audio data source other than private enjoyment.
[0058]
Further, as can be seen from FIG. 2, an identification code is added for each pack data. For example, when one music piece is considered, the identification code exists at intervals of several milliseconds to several hundred milliseconds. Then, for example, a case where digital audio data editing processing or the like is performed in the personal computer 50, for example, a case where a new music file is generated by being combined with digital audio data copied from another source is considered. Since the process of repeatedly checking the identification code is performed as shown in FIG. 3, only the audio data portion digitally copied from the MD / CD recording / reproducing apparatus 90 can be recorded. That is, the digital copy cannot be made for a portion that may exceed the private copy.
[0059]
As can be seen from the above, in this example, with regard to private replication, high-quality data copying can be performed at high speed, and there is a risk that the copying act may exceed the scope of private replication. Therefore, the copy operation is prohibited, and a digital copy system preferable for both the user and the author can be constructed.
[0060]
The present invention is not limited to the configuration and operation of the above example, and it goes without saying that various modifications can be considered.
In the above example, a digital copy system using an MD / CD recording / reproducing apparatus and a personal computer has been described. However, other digital recording / reproducing apparatuses such as a DAT recording / reproducing apparatus and a DVD (digital video disk) recording / reproducing apparatus also constitute the system. The target of the unit.
[0061]
It can also be applied to music provision from providers such as the Internet to general users.
In other words, the provider, for example, inserts the identification code of the recording device used by the contracted specific user, transmits music or the like in the data format as shown in FIG. 4A to the user's personal computer, and downloads it 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 provision form by communication of music or the like can be realized.
[0062]
【The invention's effect】
As described above, according to the present invention, 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 is uniquely set to the first recording / reproducing unit. The identification code is also transmitted so that the reproduction data and the identification code are recorded on the recording medium in the second recording / reproducing unit. Further, when the reproduction 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 includes the first data in the transmitted data. Only when the same identification code as the identification code uniquely set in the recording / reproducing unit is confirmed, the recording operation of the transmitted data on the recording medium can be executed. For this reason, in the first recording / reproducing unit, it is possible to digitally copy from the second recording / reproducing unit the data which is transmitted from the first recording / reproducing unit to the second recording / reproducing unit and digitally copied.
In other words, high-quality and high-speed copying can be performed only 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 / reproducing 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 apparatus of the embodiment.
FIG. 3 is a flowchart of processing when receiving data is copied 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 apparatus of the embodiment.
FIG. 5 is an explanatory diagram of a system configuration example capable of digital data communication;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 System controller, 4 Non-volatile memory, 5 IF processing part, 12 Optical head, 15 Encoder / decoder part, 16 Memory controller, 17 Buffer memory, 18 Voice compression encoder / decoder part, 20 Magnetic head, 50 Personal computer, 50a Hard disk Drive, 70 MD / CD recording / reproducing device, 90 MD, 91 CD

Claims (7)

A first recording / reproducing unit capable of recording and reproducing digital data with respect to a predetermined recording medium;
Digital data can be transmitted / received to / from at least the first recording / reproducing unit. The digital data read from the first recording medium by the first recording / reproducing unit is recorded on the second recording medium. And a second recording / reproducing unit capable of reproducing digital data from the second recording medium and supplying the digital data to the first recording / reproducing unit,
The first recording reproduction unit, the reproduction data reproduced from the first recording medium when transmitting the second recording reproduction unit, said first identification code set uniquely in the recording reproducing unit also it sends,
Before Stories second recording unit, and records the identification code and the reproduced data transmitted from said first recording and reproducing unit to the second recording medium, is reproduced from the second recording medium wherein Transmitting reproduction data and the identification code to the first recording / reproducing unit ;
Before SL first recording reproduction unit, the identification code transmitted from the second recording unit, compares the identification code set in the specific of the first recording reproduction unit, both The digital copy system can execute the recording operation of the transmitted reproduction data and the identification code on the third recording medium only when they match . The first recording / reproducing unit has storage means for storing an identification code set unique to the first recording / reproducing unit;
Recording control means for enabling the recording operation of the transmitted data to the recording medium when the identification code included in the transmitted data matches the identification code stored in the storage means. The digital copy system according to claim 1, wherein: Recording / reproducing means capable of recording and reproducing digital data on a recording medium;
Storage means for storing a unique identification code of the recording / reproducing apparatus;
Transmitting means for generating transmission data by adding the identification code stored in the storage means to the reproduction data reproduced by the recording / reproducing means, and transmitting the data to an external device;
Which receives the data transmitted from the external device, receiving means capable of extracting an identification code from among the received said data,
Comparing the unique identification code stored in the identification code and the storage means extracted by the receiving unit, only if they match, the recording and reproduction of the data received by the receiving means Recording control means for permitting the recording operation to the recording medium by the means;
A recording / reproducing apparatus comprising:   4. The recording / reproducing according to claim 3, wherein the transmitting unit generates the transmission data by adding the identification code for each data unit of a predetermined amount to the data reproduced by the recording / reproducing unit. apparatus.   5. The recording / reproducing apparatus according to claim 4, wherein the data reproduced by the recording / reproducing means is compressed digital data. The recording / reproducing means reproduces the compressed digital data from the recording medium,
A transmission data is generated by adding a unique identification code of a recording / reproducing apparatus having the recording / reproducing means to the compressed digital data, and transmitted to an external device,
Which receives the data transmitted from the external device, and extracts the identification code and the compressed digital data from the received said data,
The extracted identification code is compared with the unique identification code of the recording / reproducing apparatus , and only when the two coincide with each other , the recording operation of the extracted compressed digital data on the recording medium by the recording / reproducing means Recording and playback methods that allow.   The transmission data is generated by adding the identification code to each unit of a predetermined amount of the compressed digital data in the step of transmitting the transmission data to an external device. Recording and playback method.

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