JPH04212756A - Recording and reproducing device, reproducing device, recording device, reproducing medium and transmitting system - Google Patents

Abstract

PURPOSE:To limit the number of generation in digital recording by updating and recording generation information every time the digital recording is executed and inhibiting the digital recording in the case of attaining a specified generation. CONSTITUTION:When dubbing is executed on a tape 9, a sub code decoder 21 discriminates whether the generation of the tape is the generation to be updated or whether succeeding dubbing can not be executed on the tape because the tape attains a certain generation. When the obtained generation information is inputted in a discrimination part 11 through a digital recording control signal conversion part 22, the discrimination part 11 discriminates whether or not a digital input signal is a signal which can be recorded by updating the generation. Then, a digital recording control signal generation part 12 records the updated generation information different from the reproduced tape on the tape according to the input signal which is judged.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a recording/playback device, playback device, or recording device that directly records and plays back digital signals, such as a digital audio tape recorder (hereinafter referred to as DAT), and a recording device that records digital signals. The present invention relates to a reproduction medium for reproducing data, and a transmission method for connecting between recording and reproducing devices or between a reproducing device and a recording device.

0002

[Background Art] In recent years, the standardization of interface specifications, which is a transmission method for connecting audio devices using digital signals, has progressed, and the standardization of interface specifications has progressed.
In addition to the analog output terminal, there is a
Products equipped with digital output terminals have been commercialized. In addition, playback media such as DAT tapes that can directly record and play back digital signals, recording and playback devices such as DAT,
Reproducing devices and recording devices have been put into practical use.

[0003] Hereinafter, the above-mentioned recording and reproducing apparatus, reproducing apparatus,
As an example of a recording device, a playback medium, and a transmission method, D
AT, CD player, BS tuner, DAT tape,
A digital audio interface will be explained with reference to the drawings.

FIG. 3 is a connection diagram of audio equipment centered on a DAT, FIG. 4 is a part of a signal format of a digital audio interface, and FIG. 5 is a part of a DAT recording format.

In FIG. 3, 61 is a BS tuner, and 61A and 61D are analog output terminals and digital output terminals of the BS tuner 61. 62 is a CD player, and 62A and 62D are analog output terminals and digital output terminals of the CD player. 63 is DAT; 63
A and 63D are analog output terminals and digital output terminals of the DAT63. 64 is an analog audio device such as an FM tuner or an analog record player, and 64A is an analog output terminal of the analog audio device 64. 65 and 66 are DAT, respectively, and 6
5B, 66B are analog input terminals of DAT65, DAT66, 65C, 66C are digital input terminals of DAT65, DAT66, 65A, 66A are DAT65, DAT6
6 analog output terminal, 65D, 66D are DAT65,
This is the digital output terminal of DAT66. From the digital output terminals 61D, 62D, 63D and 65D of each device,
Digital input terminal 65C of DAT65 and DAT66
Signals are exchanged at the digital input terminal 66C in a specified transmission format as shown in FIG. As shown in FIG. 4(a), two subframes, a left channel and a right channel, are configured at the time when an analog signal is sampled. Each subframe consists of 32 bits as shown in FIG. 4(b), including a 4-bit synchronization amble,
It is configured to transfer 20-bit audio data after the 4-bit error signal. The channel status signal, which is 1 bit of the remaining 4 bits, is configured to have meaning as one block of 192 bits, as shown in FIG. 4(c). Six bits from bit 0 to bit 5 of the channel status signal are control bits and indicate the purpose of the audio data and whether or not digital copying is possible. That is, when bit 2 of the channel status signal of the signal input to the digital input terminal 65C is "0", the DAT 65 cannot perform digital copying. (For example, see "Electronics Life," Volume 655, pages 18-19.) Also, for copyrighted items such as compact discs, there is a signal on the playback medium that indicates prohibition of digital copying, such as compact discs. When this compact disc is played back, bit 2 of the channel status signal will be “
0" is output from the digital output terminal. Therefore, when playing a compact disc on which such a music source is recorded, the signal from the digital output terminal 62D of the CD player 62 is output from the bit of the channel status signal. Since 2 is "0", the DAT65 cannot record.

[0006] Also, DAT63, DAT65, DAT6
The tape No. 6 has the recording format shown in Figure 5, and the PCM data in which the audio signal is encoded and the main ID for playing back the PCM data are located in the center of the tape.
It is stored in the CM area. The PCM area shown in FIG. 5(a) consists of 128 blocks, and one block is shown in FIG. 5(b).
It consists of 288 bits as shown in . The main ID is shown in Figure 5.
As shown in (c), format I is inserted one block at a time.
D. It is repeatedly recorded from ID1 to ID6 and ID7. As shown in Figure 5(d), format ID 2
When the bit is “00”, that is, when the DAT tape is recording audio data, digital copying is possible when the 2 bits of ID6 are “00”, and “1
0”, digital copying is prohibited. In other words, D
A tape recorded by an AT user has ID6 set to "00" and can be digitally copied, but in the case of a soft tape such as a music source, if "10" is recorded in ID6, digital copying is not possible.

However, it is now possible to record from the analog output terminal 62A of the CD player 62 to the analog input terminal 65B of the DAT65, and from the analog output terminal 63A of the DAT63 to the analog input terminal 65B of the DAT65, making it possible to record from the analog output terminal 62A of the CD player 62 to the analog input terminal 65B of the DAT65. Soft tapes allow analog copying even if digital copying is prohibited. However, in this case, the D
A conversion circuit or DAT63 DA conversion circuit and DAT
Since it goes through 65 AD conversion circuits, there may be some deterioration in sound quality compared to digital copy. Furthermore, once an analog recording has been performed on a tape, ID6 shown in FIG. 5(d) is "00".
Therefore, from now on, digital copies without sound quality deterioration will be used.
For example, from DAT65 to DAT66, the possibilities are endless.

[0008]

[Problem to be solved by the invention] As explained above,
Systems that use conventional recording and playback devices such as DAT, playback devices such as DAT and CD, recording devices such as DAT, playback media such as DAT tapes, and transmission methods such as digital audio interfaces can be enjoyed by individuals. Despite the freedom of recording for
Playback media such as compact discs and DAT music soft tapes contain a digital copy prohibition signal in the digital signal, so the digital signal cannot be directly copied, and DAT users will experience a slight deterioration in sound quality. This will force recording using analog signals. Therefore, there has been a problem in that the advantages of DAT for recording digital signals cannot be fully utilized.

On the other hand, DAT once recorded as an analog signal
Since the main ID ID6 of the tape is recorded as "00", unlimited digital copying is possible from then on.
Although the sound quality of compact discs and DAT music soft tapes deteriorates to some extent during analog recording, it is possible to make digital copies without deteriorating the sound quality. Therefore, there was a problem in that it could bring a very large disadvantage to the software industry such as music.

Conventional recording and reproducing devices such as DAT, DAT
, playback devices such as CDs, recording devices such as DAT, DAT
Systems that use playback media such as audio tapes and transmission methods such as digital audio interfaces are
Because only one bit (bit 2 of the channel status signal) was used to determine whether or not digital copying was possible, compact discs and DAT music soft tapes could never be copied using digital signals, and analog analog signals remained unchanged in content. However, there was a problem in that it was possible to record an unlimited number of recordings.

In view of the above problems, the present invention limits the number of generations from compact discs and DAT music tapes, and
A recording/playback device such as a DAT, which is capable of digital copying to a DAT, and limits the number of generations of subsequent digital copies from the copied DAT tape;
Playback devices such as DAT and CD, recording devices such as DAT,
It provides playback media such as DAT tapes and transmission methods such as digital audio interfaces.

0012

[Means for Solving the Problems] In order to solve the above-mentioned problems, the recording and reproducing apparatus of the present invention is configured to either update the generation when copying from the reproducing medium, or to update the generation after reaching a specific generation. medium identification means for identifying whether the reproduction medium is of a generation that cannot be copied; means for converting generation information obtained from the medium identification means into an output signal; input identification means for identifying whether the input signal is of a certain generation or an input signal that has reached a specific generation; and an input signal whose generation is updated and recorded when it is copied based on the generation information obtained from the input identification means. a recording control means for controlling whether copying is possible so that input signals reaching a specific generation can be copied and cannot be copied; and an input signal for updating and recording the generation when the recording control means determines that copying is possible. The apparatus is characterized by comprising a generation information setting means for recording updated generation information different from that of the reproduction medium on the recording medium.

Furthermore, the playback device of the present invention can determine from the playback medium whether the playback medium is of a generation that updates its generation when copied, or whether it is a playback medium of a specific generation that has reached a certain generation and cannot be copied thereafter. The present invention is characterized by comprising a medium identifying means for identifying the medium and a means for converting generation information obtained from the medium identifying means into an output signal.

Furthermore, the recording apparatus of the present invention determines from the input signal whether the input signal is of a generation whose generation will be updated and recorded when it is copied, or whether the input signal has reached a specific generation and cannot be copied thereafter. The input identification means for identifying and the generation information obtained from the input identification means enable copying of input signals whose generations are updated and recorded when copying, and prevent copying of input signals that have reached a specific generation. A recording control means for controlling whether copying is possible, and a generation information setting means for recording updated generation information on the recording medium, which is different from the reproduction medium, and an input signal for updating and recording the generation when copying is performed when the recording control means determines that copying is possible. It is characterized by having the following.

[0015] Furthermore, the playback medium of the present invention uses a signal of a plurality of bits recorded on the playback medium, and is a generation signal that updates the generation when copied, or a generation signal that reaches a certain generation and cannot be copied thereafter. The signal is characterized by including generation information indicating whether the signal is

Furthermore, the transmission method of the present invention uses a plurality of bits of a digital signal that connects devices to each other to determine whether the signal is of a generation that updates the generation when it is copied, or whether it is a signal of a generation that updates the generation when it is copied, or when a specific generation has been reached and subsequent copies are not possible. It is characterized by transmitting generation information indicating whether the signal is of a generation that cannot be used.

[0017]

[Function] The present invention has the following effects due to the above-described structure. The recording/playback device according to claim 1 can limit the number of digital copy generations by updating and recording generation information every time a digital copy is made and prohibiting digital copy when a specific generation is reached. . In addition, when digitally copying a compact disc or DAT music soft tape, the generation information output from the playback device determines that the recording device is capable of digital copying and plays back the digitally copied compact disc or DAT music soft tape. By controlling the generation information output by playing the media so that the recording device determines that digital copying is prohibited, it is possible to digitally copy compact discs and DAT music soft tapes by limiting the number of copy generations. Become. Therefore, the user is not forced to record using an analog signal, which degrades the sound quality to some extent.

[0018] The playback device of claim 2 is a recording device that updates and records the generation information during digital copying by outputting the generation information, or prohibits digital copying by discriminating it as a specific generation that cannot be digitally copied. By combining them, it is possible to limit the number of generations of digital copies.

[0019] The recording device according to claim 3 is combined with a playback device that outputs generation information by updating and recording generation information every time a digital copy is made, and prohibiting digital copy when a specific generation is reached. This makes it possible to limit the number of digital copy generations.

[0020] The playback medium according to claim 4 is a signal of a generation that updates the generation when it is copied, or a signal of a generation that reaches a specific generation and cannot be copied thereafter, depending on the recorded signal of a plurality of bits. By including generation information indicating the generation information, the generation information is determined by the playback device that outputs this generation information, and the generation information is updated and recorded every time a digital copy is made. By combining this with a recording device that prohibits copying, the number of digital copy generations can be limited.

[0021] The transmission method according to claim 5 is a generation signal that indicates whether the generation signal updates the generation when it is copied recorded on a playback medium or the generation signal reaches a specific generation and cannot be copied thereafter. By transmitting information from the playback device to the recording device, the recording device determines the generation information and updates and records the generation information each time a digital copy is made.
By prohibiting digital copying when a specific generation is reached, the number of digital copy generations can be limited.

[0022]

[Example] An example of the recording/reproducing device, reproducing device, recording device, reproducing medium, and transmission method of the present invention will be described below.
An audio system centered on DAT will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a DAT in one embodiment of the present invention. In FIG. 1, 1 is an analog input terminal, 2 is an AD converter, 3 is a digital input terminal, 4 is a digital demodulation circuit that demodulates a digital signal input to the digital input terminal according to the transmission method of an embodiment of the present invention; 5 is a selection switch for selecting the output signal of the AD converter 2 or the output signal of the digital demodulation circuit 4; 6 is an interleaving process for changing the temporal arrangement of the digital signals;
Addition of error correction code, subcode encoder 1 described later
3 is a recording signal processing circuit for adding an output signal, 7 is a recording amplifier, 8 is a recording head, and 9 is a magnetic tape which is a reproduction medium according to an embodiment of the present invention. A channel status decoder 10 obtains a channel status signal shown in FIG. 4(c) from the output signal of the digital demodulation circuit 4. 11, for example, as shown in Table 1, digital copying is prohibited when bit 2 of the channel status signal is “0” and bit 14 is “1”, and digital copying is prohibited when bit 2 and bit 14 are other than the above. This is a discriminating unit that discriminates so that it is possible. 12, in the case of digital copying, the main ID 6 shown in FIG. ID6
is a digital copy control signal generator which becomes "00". 13 is a subcode encoder that creates a subcode including ID6.

[0024]

[Table 1]

[0025]

[Table 2] Reference numeral 14 indicates operation switches including a recording switch, a playback switch, and an input selector switch for switching between recording the signal input to the analog input terminal 1 and copying the signal input to the digital input terminal 3; Reference numeral 15 denotes an input setting section that controls the selection switch 5 in accordance with the input changeover switch, and controls the ID 6 to be "00" in the case of analog recording. Reference numeral 16 denotes a recording prohibition setting section that controls the recording signal processing circuit 6 to prohibit recording according to the output signal of the determining section 11. 8 is a playback head, 17 is a playback amplifier, 18 is a playback signal processing circuit that performs error correction of the digital signal and deinterleave processing to restore the original temporal order, 19 is a DA converter, and 20 is an analog output terminal. It is. 21 is a subcode decoder that obtains signals such as the main ID, and 22 is a digital copy control that obtains bits 2 and 14 of the channel status signal from ID6, which is the output signal of the subcode decoder 21, as shown in Table 3, for example. This is a signal converter.

[0026]

[Table 3] 23 is a channel status encoder that includes the output signal of the digital copy control signal converter 22. 25 is a digital modulation circuit which obtains the digital output signal shown in FIGS. 4(a) and 4(b) from the output signal of the reproduced signal processing circuit 18, the output signal of the channel status encoder 23, etc., and 26 is a digital output terminal. A system controller 27 includes a determining section 11, a digital copy control signal generating section 12, an input setting section 15, a recording prohibition setting section 16, and a digital copy control signal converting section 22, and is composed of, for example, a microcomputer.

[0027] Focusing on the DAT configured as above,
The operation of an embodiment of the recording/reproducing apparatus, reproducing apparatus, recording apparatus, reproducing medium, and transmission method of the present invention will be described below with reference to the drawings and tables.

First, when digitally copying a compact disc or a DAT soft tape, input the signals shown in FIGS. When the switch is set to digital copy and the recording switch is pressed, the system controller 27, in decision step 31 of FIG.
It is determined that the recording switch is pressed, and the process proceeds to judgment step 32. In judgment step 32, it is determined that digital copy is set, and the input setting unit 15 sets the selection switch 5 to input the output signal of the digital demodulation circuit 4 to the recording signal processing circuit 6, and performs processing. Step 33 is reached. In processing step 33, the determining unit 11
inputs the output signal of the channel status decoder 10 and checks bit 2 and bit 14 of the channel status signal. When playing a compact disc or DAT soft tape, bit 2 is a signal indicating that digital copying is prohibited, that is, "0", and bit 14 is currently "0", so from Table 1, digital copying is possible. It is determined that Accordingly, the decision step 34 leads to the processing step 35. In processing step 35, the digital copy control signal generation section outputs a signal whose ID6 is "10" from Table 2 to the subcode encoder 13. Then, in process step 36, system controller 27 sets the recording mode. The output signal of the subcode encoder 13 including the ID 6 and the output signal of the selection switch 5 are recorded on a magnetic tape 9 by a recording head 8 via a recording signal processing circuit 6 and a recording amplifier 7. Therefore, even compact discs and DAT soft tapes can be digitally copied.

Next, the compact disc or DAT soft tape is digitally copied and played back on the DAT.
A case will be described in which an attempt is made to digitally copy a reproduced digital output signal using another DAT.

When the playback switch in the operation switch 14 of the playback side DAT is pressed, the system controller 27 recognizes that the playback switch has been pressed in a determination step 39, and transfers the signal recorded on the magnetic tape 9 to the playback head. 2
8 reproduces the audio signal, passes through the reproduction amplifier 17 and the reproduction signal processing circuit 18, and outputs the digital signal of the audio signal to the DA converter 1.
9 and the digital modulation circuit 25, and the subcode signal passes through the subcode decoder 21 and is inputted to the digital copy control signal converter 22. In processing step 40, the digital copy control signal converter 22 converts ID6 of the main ID into bits 2 and 14 of the channel status signal according to Table 3. Tape 9 I being played
Since D6 is "10", bit 2 of the channel status signal becomes "0" and bit 14 becomes "1". The output signal of the digital copy control signal converter 22 is input to the channel status encoder 23, and the channel status encoder 23 creates the signal shown in FIG. 4(c). Subsequently, in processing step 41, the digital modulation circuit 2
5 obtains the digital signals shown in FIGS. 4(a) and 4(b) from the output signals of the channel status encoder 23 and the reproduced signal processing circuit 18, and outputs them from the digital output terminal 26. When this signal is connected to the digital input terminal 3 of the recording side DAT and an attempt is made to record it, in the determination step 34 of the system controller 27 of the recording side DAT, the determination unit 11 determines that digital copying is prohibited as shown in Table 1. As a result, the recording prohibition setting section 16 is configured to, for example,
Recording is prohibited by blocking the signal output from the recording amplifier 7 to the recording amplifier 7. Therefore, digital copying cannot be performed using DAT from a compact disc or a tape recorded with DAT soft tape.

Next, a case will be described in which a signal input from the analog input terminal 1 is recorded and this tape is digitally copied.

When the input changeover switch of the operation switch 14 of the recording side DAT is set to analog recording and the recording switch is pressed, the system controller 27 determines analog recording in judgment step 32 and inputs the signal to the analog input terminal 1. A signal converted into a digital signal by the AD converter 2 is input to the selection switch 5. The input setting section 15 controls the selection switch 5 to select the output of the AD converter, and in processing step 37 outputs a control signal to the digital copy control signal generation section 12 so that ID6 becomes "00". Next, in processing step 36, the subcode signal including ID6 and the selection switch 5
The output signal is recorded on the magnetic tape 9. The tape recorded in this way is referred to as a first generation tape.

When creating a second generation tape by digitally copying a first generation tape, when the first generation tape is played back, in processing step 40 of the system controller 27 of the playback side DAT, the digital copy control signal converter 22, ID6 is "00", so from Table 3, bit 2 of the channel status signal is "1" and bit 14 is "
1". When the signal from the digital output terminal 26 including this signal is digitally copied by another DAT, in the judgment step 34 of the system controller 27 of the recording side DAT, the discrimination unit 15 determines whether the channel status signal Since bit 2 is "1" and bit 14 is "1", digital copying is possible from Table 1, and processing step 35 is reached, where the digital copy control signal generation unit 12 sets ID6 to "01" from Table 2. The tape recorded in this way is called a second generation tape.

Similarly, when creating a third generation tape by digitally copying a second generation tape, when the second generation tape is played back, the digital copy control signal converter 22 of the playback side DAT converts the data as shown in Table 3. outputs a signal in which bits 2 and 14 of the channel status signal are both "0". When the signal from the digital output terminal 26 including this signal is input to the digital input terminal 3 of the recording side DAT and digitally copied, the discriminator 15 detects that the channel status signal has both bits 2 and 14 of "0". 1, digital copying becomes possible, and the digital copy control signal generating unit 12 sets ID6 to be "10" from Table 2. The tape recorded in this way is referred to as a third generation tape.

Similarly, if you try to make a fourth generation tape by digitally copying a third generation tape,
When a generation tape is played back, the digital copy control signal converter 22 of the playing side DAT outputs a signal in which bit 2 of the channel status signal becomes "0" and bit 14 becomes "1" as shown in Table 3. Digital output terminal 26 containing this signal
When attempting to input a signal from the recording side DAT to the digital input terminal 3 of the recording side DAT to perform digital copying, in judgment step 34 of the system controller 27, the determining unit 11 determines that digital copying is prohibited as shown in Table 1. As a result, the recording prohibition setting unit 16 prohibits recording by, for example, cutting off the signal output from the recording signal processing circuit 6 to the recording amplifier 7. Therefore, it is not possible to make fourth generation tapes by digital copying.

As described above, the transmission method for connecting DATs includes a 2-bit channel status signal, which is a copy control signal, in the digital signal, and this 2-bit signal transmits copy generation information. I can do it. Further, the DAT, which is a recording device or a recording/playback device, includes a determining section that is an input identifying means that determines whether digital copying is possible based on generation information of a copy control signal of an input digital signal, and , is equipped with a copy control signal generating section which is a generation information setting means for obtaining ID6 in the main ID of the copy control subcode signal of the 2-bit generation information to be recorded on the tape which is the playback medium. , 2-bit generation information will be recorded. The DAT, which is a playback device or recording and playback device, also includes a subcode decoder, which is a medium identification means, that identifies a copy control subcode signal, which is generation information, from the reproduced value of ID6, and a subcode decoder that is included in the input signal. 2
By providing a copy control signal converter as an output means that outputs a copy control signal that is generation information with a value different from that of a bit copy control signal, it is possible to provide a copy control signal in a DAT that is a recording device or a recording/playback device. By providing a recording prohibition setting unit, which is a recording control means, so as to prohibit digital copying when the value reaches this value, it is possible to limit the number of generations of digital copying.

Furthermore, since the DAT on the recording side discriminates the copy control signal, which is 2-bit generation information of the signal in the transmission method, and controls whether or not digital copying is possible, the 1-bit generation information of the signal in the transmission method is judged. By signal, compact disc or DA
Unlike prohibiting digital copying of T-soft tapes, it is possible to limit the number of copy generations and enable digital copying of compact discs and DAT soft tapes.

Furthermore, as in this embodiment, if one bit of the 2-bit copy control signal corresponds to bit 2 of the channel status signal, which is a conventional copy control signal, conventional compact discs, etc. There is no need to change your digital audio equipment.

In the above explanation, the 2-bit copy control signal was explained as generation information, but there is an undefined part in the DAT subcode signal area, and the channel status signal is also undefined, as shown in FIG. 5(c). There is a used part. Therefore, it is also possible to use a copy control signal with an increased number of bits depending on the number of copy generations.

[0040]

[Effects of the Invention] As described above, the present invention provides recording and reproducing devices such as DAT, reproducing devices such as DAT and CD, recording devices such as DAT, reproducing media such as DAT tape, and transmission of digital audio interfaces. In a system using this method, generation information consisting of multiple bits is used as a condition for digital copying, and a playback device or recording/playback device reproduces and outputs the generation information recorded on the playback medium, and transmits this generation information. The system transmits information, and the recording device or recording/playback device updates and records this generation information or prohibits digital copying when a specific generation is reached, thereby achieving the following effects.

Even with playback media such as compact discs and DAT music soft tapes, it is possible to directly copy digital signals, forcing DAT users to record with analog signals that degrade the sound quality to some extent. There isn't.

[0042] Furthermore, once a playback medium has been recorded as an analog signal, the number of generations of subsequent digital copies is limited, and compact discs and DAT music software tapes can be reproduced with less deterioration in sound quality by digital copying after analog recording. You won't be able to create an unlimited amount. Therefore, there is less possibility that it will cause a huge disadvantage to software industries such as music.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a DAT in one embodiment of the present invention.

FIG. 2 is a flowchart showing processing of the system controller in FIG. 1;

FIG. 3 is a connection diagram of audio equipment centered on a DAT.

FIG. 4 is a format diagram showing main parts of a signal format of a digital audio interface.

FIG. 5 is a format diagram showing main parts of a DAT recording format.

[Explanation of symbols]

3 Digital input terminal 10 Channel status decoder 11 Discriminator 12 Digital copy control signal generator 13 Subcode encoder 21 Subcode decoder 22 Digital copy control signal converter 23 Channel status encoder 26 Digital output terminal 27 System controller

Claims (6)

[Claims] 1. A medium identification means for identifying from a playback medium whether the playback medium is of a generation that updates its generation when copied or a playback medium of a generation that reaches a certain generation and cannot be copied thereafter; An output means converts the generation information obtained from the identification means into an output signal and outputs the same; input identification means for identifying whether the input signal is of a generation that cannot be copied;
Based on the generation information obtained from the input identification means, when a copy is made, the generation is updated so that the input signal to be recorded can be copied, and an input signal that has reached a certain generation and cannot be copied thereafter can be made uncopyable. A recording control means to control, and an input signal which is determined to be copyable by the recording control means and whose generation is updated and recorded when copying is transmitted to a generation information setting means which records updated generation information on the recording medium which is different from the reproduction medium. A recording and reproducing device characterized by comprising: 2. A medium identification means for identifying from a playback medium whether the playback medium is of a generation that updates its generation when copied or a playback medium of a generation that reaches a certain generation and cannot be copied thereafter; A playback device characterized by comprising an output means for converting generation information obtained from the identification means into an output signal and outputting the signal. 3. Input identification means for identifying, from an input signal, whether the input signal is of a generation whose generation is updated and recorded when copied, or the input signal of a generation that has reached a certain generation and cannot be copied thereafter. Then, based on the generation information obtained from the input identification means, when copying, the generation is updated and recorded input signals can be copied, and input signals that have reached a certain generation and cannot be copied thereafter cannot be copied. A recording control means controls whether or not copying is possible, and an input signal that is determined to be copyable by the recording control means and whose generation is updated and recorded when copying is set to a generation information setting that records updated generation information on the recording medium, which is different from that of the playback medium. A recording device characterized by comprising means. [Claim 4] A multi-bit signal recorded on a playback medium indicates whether the signal is of a generation that updates the generation when copied, or a signal of a generation that has reached a certain generation and cannot be copied thereafter. A playback medium characterized by including generation information. [Claim 5] Depending on the signal of multiple bits of digital signals that connect devices, is the signal of a generation that updates the generation when copied, or is the signal of a generation that reaches a certain generation and cannot be copied thereafter? A transmission method characterized by transmitting generation information indicating. 6. Connecting digital audio equipment, one sampling period consists of two subframes, one subframe consists of a 4-bit synchronization amble and a 4-bit synchronization amble.
A digital audio interface signal consisting of a 32-bit error signal, 20-bit audio data, channel status, user data, channel status, and 1-bit parity bit each is transmitted as one unit in 192 frames. bit 2 and bit 8 to bit 15 of the channel status signal consisting of bit 0 to bit 191.
By a signal of multiple bits including one bit in
6. The transmission method according to claim 5, wherein generation information indicating whether the signal is of a generation that updates the generation when it is copied or the signal of a generation that reaches a certain generation and cannot be copied thereafter is transmitted.