JPH01227271A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To limit the number of the times of digital copy and analog copy by inhibiting the recording of a digital signal which contains a copy inhibiting bit and a category code which shows a recording and reproducing device and inhibiting the recording of an analog signal. CONSTITUTION:When digital-recording a signal which contains the copy inhibiting bit like a compact disk, a copy inhibition discriminating part 10 inputs the output signal of a digital input decoder 4, checks a channel status, discriminates that the copy inhibiting bit is present, inputs the output signal of a decoder 4 to a category code discriminating part 11 and discriminates the compact disk. Next, a system controller 27 sets a recording mode and the signal is recorded on a magnetic tape 9 by a recording head 8. When analog- copying a tape on which the compact disk is analog-recorded and reproduced, an inhibition signal is discriminated by an analog copy inhibiting signal discriminating part 31, the recording becomes impossible and the multigeneration analog copy becomes impossible. Thus, the number of the times of the digital copy and analog copy can be limited.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording and reproducing apparatus that can directly record and reproduce digital signals, such as a digital audio tape recorder (hereinafter referred to as DAT).

Conventional technology In recent years, the standardization of interface specifications for connecting audio devices using digital signals has progressed, and CD players, satellite broadcast tuners (hereinafter referred to as BS tuners), etc. have digital output terminals in addition to analog output terminals. What is available is being commercialized. Furthermore, recording and reproducing devices such as DAT that can directly record digital signals have been put into practical use.

Hereinafter, a DAT will be described as an example of the above-mentioned recording/reproducing apparatus with reference to the drawings.

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

In FIG. 5, 61 is a BS tuner;
61D is an analog output terminal and a digital output terminal of the BS tuner 61. e2 is a CD player, 62, and 62D is an analog output terminal of the CD player. 63 is DAT υ, 63 people, 63D is D A
T 63 (7) 7 fog output terminal, digital output terminal. 64 is an analog audio device such as an FM tuner or an analog record player,
64 people used analog audio equipment64. This is an analog output terminal.

65 and 66 are DAT and 65B respectively.

eeB is the analog input terminal of DAT65, DAT66; esc, 66C; is the DAT65. DAT66 digital input terminal, 66A, 66 people are DAT65°DAT
θ6 analog output terminal, 65D and 86D are DAT6
5, the digital output terminal of DAT66. Digital output terminals 61D and 62D for each device.

63D and asD, the fourth output terminal esc of DAT65 and the digital input terminal of DA'r66
Signals are exchanged in a prescribed format as shown in the figure. As shown in FIG. 4a, two subframes, one for the left channel and one for the right channel, are constructed during the sampling time of the analog signal. As shown in Figure 4, each subframe consists of 32 bits, and is configured to transfer 20 pits of audio data after a 4-bit synchronization signal and 4-bit spare data. remaining 4
The bits are structured so that 192 pintos have a meaning as one block, as shown in FIG. 4C using the channel status as an example. Six bits from bit 0 to pin 1-64 of the channel status are control bits, and indicate the purpose, whether digital copy is possible, etc. That is, if bit 2 of the channel status of the signal input to the digital input terminal esc is "0", DATes
cannot record digitally. (For example, see [Electronics Life Vol. 4, No. 656, pp. 18-19] Copyrighted items such as compact discs generally have a signal recorded on them indicating that digital copying is prohibited. When a compact disc is played back, a signal in which bit 2 of the channel status becomes 0 is output from the digital output terminal. Therefore, when a music source is reproduced, the DAT 65 cannot record the signal from the digital output terminal 62D of the CD player 62 because bit 2 of the channel status is "O".

In addition, DAT63, DATθ5, and DAT68 tapes have a recording format as shown in Figure 6, and the PCM data that encodes the audio signal and the main ID for playing the PCM data are stored in the PCM area at the center of the tape. recorded. The PCM area shown in Figure 6a is 12
It consists of 8 blocks, and one block consists of 288 bits as shown in FIG. The main 'Ll) is 14D, ID1 in one block jump as shown in Figure S.
to II)6. It is recorded repeatedly until the ID is completed.

As shown in Figure 6d, when the 2 bits of the formant ID are "00", that is, when the DAT is an audio recorder, digital copying is possible when the 2 bits of the ID6 are "Oo", and "10". In this case, digital copying is prohibited. In other words, the audio recorded by the DAT user
The IDe will be “0011” and digital copying will be possible, but in the case of soft tapes such as music sources, the ID
If "10" is recorded in 6, digital copying will not be possible.

However, recording from the analog output terminal 62 of the CD player 62 to the analog input terminal 65B of the DAT65,
It is not possible to record from the analog output terminal 63 of the AT63 to the analog input terminal 65B of the DAT65, and analog copying of compact discs and DAT soft tapes is possible even though digital copying is prohibited. However, in this case, since the signal passes through the DM conversion circuit of the CD player 62, the DM conversion circuit of the DAT 63, and the MU conversion circuit of the DAT 65, some deterioration in sound quality can be avoided compared to digital copying. Furthermore, since the IDe shown in FIG. 6(d) becomes "oO" for a tape that has been analog-recorded at -degrees, digital copies can be made infinitely thereafter.

Problems to be Solved by the Invention As explained above, although conventional DAT allows the freedom of recording for personal enjoyment, compact discs contain a code in the digital signal that prohibits digital copying. Therefore, it is not possible to directly record digital signals, and DAT users are forced to record with analog signals, which degrade the sound quality to some extent. Therefore, there has been a problem in that the advantages of DAT for recording digital signals cannot be fully utilized.

On the other hand, a DAT tape recorded with a -degree analog signal is
Since the main ID IDe is recorded as "00゛1," unlimited digital copying is possible from then on.Compact discs and DAT music soft tapes can be digitally copied, although the sound quality deteriorates somewhat when recording analog. It is possible to make copies without deterioration in sound quality by copying.Therefore, this has had the problem of causing a huge disadvantage to the music and other software industries.

In view of the above-mentioned problems, the present invention has been developed to
It is possible to digitally copy to a pDAT for a limited number of times, and digital copying from the copied DAT tape is prohibited from now on, and digital copying is possible even for analog-recorded DAT tapes. The present invention provides a recording and reproducing device including a DAT that limits the number of times.

Hereinafter, when bit 2 of the channel status is "O", this bit 2 will be referred to as a copy inhibition bit.

Means for Solving the Problems In order to solve the above problems, the recording and reproducing apparatus of the present invention includes a copy prohibition bit determination unit that determines the presence or absence of a copy prohibition pit indicating whether or not digital copying is possible in a digital signal that connects devices. , a category code determination section that determines the category code that indicates which device the output is from, an input setting section that selects digital copy or analog copy, and an analog copy prohibition signal that indicates prohibition of analog copy from the analog input signal. An analog copy prohibition signal determination unit that determines the presence or absence of an analog copy prohibition signal, an output signal of the copy prohibition bit determination unit, an output signal of the category code determination unit, and an output signal of the input setting unit, and two bits that indicate whether or not the reproduced signal can be copied. a copy control signal generation section that obtains a copy control subcode signal, and a copy control signal determination section that discriminates the copy control subcode signal when reproducing the recorded signal;
A copy prohibition bit setting section that sets a copy/-prohibition bit added to the digital output signal from the output signal of the copy control signal discriminator, a category code setting section that sets a category code, and the output of the copy prohibition bit discriminator. A recording prohibition setting section for prohibiting recording on a recording medium from the signal, an output signal of the category code discriminating section, an output signal of the analog copy prohibition signal discriminating section, and an analog copying from the output signal of the copy control signal discriminating section. It is equipped with an analog copy prohibition signal generation section that generates a prohibition signal.

According to the above-described structure, the present invention includes a recording prohibition setting section that prohibits recording of a digital signal including a copy prohibition pit and a category code indicating a recording/reproducing device, and also prohibits recording of an analog signal including an analog copy prohibition signal. If configured, even digital signals that include a copy prohibition bit, such as a compact disc, can be copied once, but it will no longer be possible to copy from what has been copied, thus limiting the number of digital copies. Can be done. Also, in the case of analog copying, when recording analog,
By adding an analog copy prohibition signal and repeating copies, if the configuration is such that a copy prohibition bit and a category code indicating the recording/playback device are added to the digital output signal, the number of analog copies as well as digital copies can be increased. It is possible to limit the

EXAMPLE Hereinafter, an example of the present invention will be described using a DAT as an example with reference to the drawings.

1 is an analog input terminal, 2 is a Muku converter, 3 is a digital input terminal, 4 is a digital demodulation circuit that demodulates the digital signal input to the digital input terminal 3, and 5 is an output signal of the Muku converter 2 or the digital demodulation circuit 4. e is a recording signal processing circuit that performs interleaving processing to change the temporal order of the digital signal, addition of an error correction code, and addition of an output signal of the subcode encoder 13 (to be described later); 7 is a recording amplifier, 8 is a recording head, and 9 is a magnetic tape. Reference numeral 10 denotes a copy inhibition bit determination unit that determines whether Z2 of the channel status is "01" or not. 11 indicates that the category code shown in C in FIG. 4 is a code generally indicating that the signal is from a DAT, or a signal that is a signal from a DAT but allows digital copying regardless of the presence or absence of a copy prohibition bit. This is a category code determination unit that determines whether the signal is a category code (hereinafter referred to as D-G) or another code indicating that the signal is from a category other than DAT.

(Hereinafter referred to as gold and white) Table 1 The function 12 of the copy control signal generation unit 12 determines the IDe of the main ID shown in FIG. is obtained, for example, as shown in Table 1, and in the case of analog recording, ID6 is a copy gain signal generator that becomes "o1".13 is a subcode encoder that creates a subcode including IDes.14 15 is an operation switch including a recording switch, a playback switch, and an input selection switch for switching between recording the signal input to the analog input terminal 1 or the signal input to the digital input terminal 3; 15 is the input selection switch; Control the selection switch according to the switch, and in the case of analog recording, IDQ
This is an input setting section that controls so that the value becomes "0".
is a recording prohibition setting that controls the recording signal processing circuit 6 to prohibit recording to the symbol processing circuit and others when the copy prohibition bit discriminator 10 detects a copy prohibition bit and the category code discriminator 11 detects a DAT category code. Department. 28 is a playback head, 1 is a playback amplifier, 18
19 is a reproduction signal processing circuit that performs error correction of digital signals and de-interleaving processing to restore the original temporal alignment;
is a DM converter, and 2o is an analog output terminal. 2
1 is a subcode decoder that obtains signals such as main ID, 2
2 is from ID6 which is the output of the subcode decoder 21,
This is a copy control signal generation section that outputs commands as shown in Table 2, for example, to a copy prohibition pit setting section 29, which will be described later, to a category code setting section 30, which will be described later, and to an analog copy prohibition signal generation section 32.

Table 2 The function 29 of the copy control signal discriminator 22 sets pit 2 of the channel status to "0" when the copy control signal discriminator 22 outputs that the copy prohibition bit exists.
3o is a copy prohibition pit setting unit that sets the value to be ゛°, and 1 in other cases. 3o is “110” when the copy control signal determination unit 22 outputs DAT.
00000" is output as DAT-C, the category code setting means sets the corresponding 8-bit category code. 23 is the channel status including the output signals of the copy prohibition bit setting section 29 and the category code setting section 3o. It is an encoder. 26 is a reproduction signal processing circuit 18
26 is a digital output terminal. The digital modulation circuit obtains the digital output signals shown in FIGS.

Reference numeral 31 denotes an analog copy prohibition signal determining unit that determines whether or not an analog copy prohibition signal is included in the analog input terminal, and 32 denotes an analog copy prohibition signal generating unit that is controlled by the copy control signal determining unit 220 command. Department.

33 is the output signal of the analog copy prohibition generating section 32.
This is an adder added to the output signal of the converter 19. The analog copy prohibition signal is composed of, for example, a minute level signal outside the audible band. 27 is a copy control signal generating section 12. Input setting section 16. Recording prohibition setting section 16. Copy control signal determination unit 22. Copy prohibition bit setting section 29. This is a system controller including a category code setting section 3o, and is composed of, for example, a microcomputer.

The operation of the DAT configured as described above will be explained below using drawings and tables. FIG. 2 is a flowchart showing part of the processing of the system controller 27.

First, when digitally recording a signal that includes a copy prohibition bit such as a compact disc, the digital input terminal 3
When the signals shown in FIGS. 4a and 4b are input to the input selector switch 14, the input selector switch of the operation switch 14 is set to digital recording, and the recording switch is pressed, the system controller 27 performs the following steps in judgment step 36 of FIG. , it is determined that the recording switch is pressed, and the process proceeds to judgment step 37. In judgment step 37, it is determined that digital recording is set, and processing step 38 is reached, where input setting section 16
Then, the selection switch 6 is set to input the output signal of the digital input decoder 4 to the recording signal processing circuit 6, and the process proceeds to a judgment step 39. In judgment step 39, the copy inhibition pit discriminator 1o inputs the output signal of the digital input decoder 4 and checks pit 2 of the channel status. Since pit 2 when playing the compact disc is a digital copy prohibition signal, that is, "0," it is determined that the copy prohibition bit is present, and the process proceeds to determination step 40. In determination step 40, the category code determination unit 11 inputs the output signal of the digital input decoder 4, checks pits 8 to 15 of the channel status, and goes to processing step 42 to determine that it is a compact disc.In processing step 42, the copy control signal generator 12 outputs a signal whose ID6 is "10" from Table 1 to the subcode encoder 13. Then, in processing step 53, the system controller 27 sets the recording mode. Output signal of subcode encoder 13 including IDe and selection switch 6
The output signal is sent to the recording signal processing circuit 6. The signal is recorded on the fB tape 9 by the recording head 8 via the recording amplifier 7.

Therefore, even compact discs can be digitally copied.

Next, play the tape that has been digitally copied from the compact disc on the DAT, and transfer the played digital output signal to the other DAT.
A case where an attempt is made to perform digital copy or analog copy using AT will be explained.

When the playback switch in the operation switch 14 is pressed, the system controller 27 recognizes that the playback switch has been pressed in a determination step 46, and the playback head 28 plays back the signal recorded on the magnetic tape 9, and the playback amplifier 17
．． The digital signal of the audio signal is inputted to the zero-person converter 19 and the digital modulation circuit 26 via the reproduction signal processing circuit 18, and the subcode signal is inputted to the copy control signal conversion section 22 via the subcode decoder 21. In judgment step 47, the copy control signal determination unit 22 determines whether the ID
6 is "10", the process goes to step 48, and the copy prohibition bit setting unit 29 outputs a command to the channel status encoder 23 to set bit 2 of the channel status to "0", and also outputs a command to the analog A command is output to the copy prohibition signal generating section 32 to output an analog copy prohibition signal. Next, the process goes to judgment step 49, and since ID6 is "11Q1&," processing step 5 is reached.
2, the category code setting unit 30 sets the channel status encoder to “1100” indicating that it is DAT.
The channel status encoder 23 outputs a command to set the code that becomes "0000".
Obtain the signal shown in Subsequently, in processing step 54,
The digital output decoder 25 obtains the digital signals shown in FIGS. When attempting to record this signal by connecting it to the digital input terminal 3 of another DAT, the copy prohibition bit determination section 10 determines that a copy prohibition bit is present in judgment step 39, and in judgment step 40,
The category code determination unit 11 determines that it is DAT. In processing step 41, the recording prohibition setting section 16
It is determined that digital recording is prohibited. As a result, the recording prohibition setting section 16 prohibits recording by, for example, cutting off the signal output from the recording signal processing surface 6 to the recording undef.

In the case of analog copying, when the input selector switch of the operation switch 14 is set to analog recording and the recording switch is pressed, if analog recording is determined in judgment step 37, the input is input to analog input terminal 1 in processing step 44, The signal converted into a digital signal by the digital converter 2 is input to the selection switch. The input setting section 15 controls the selection switch 6 to select the output of the D converter 2, and the process proceeds to a judgment step 56. At judgment step 66, the analog copy prohibition signal determination unit 3
1 detects the signal added by the analog copy prohibition signal generation section 32 during playback and outputs a signal to the recording prohibition setting section 16 to prohibit recording. In processing step 41, the recording prohibition setting section 16 Determines that analog recording is prohibited. Therefore, it is not possible to make digital copies or analog copies from tapes recorded on compact discs.

The above description has been made using a compact disc as an example, but the same applies to digital copies from other categories as long as the signal includes a copy prohibition bit.

Next, when recording a signal that does not include a copy prohibition bit like a BS tuner and digitally copying and analog copying a digital tape, only the differences from the compact disc described above will be explained.

When the digital output signal of the BS tuner is input to the digital input terminal 3, in judgment step 39, the copy prohibition bit determination unit 10 determines that bit 2 of the channel status is “
1'', that is, there is no copy prohibition bit, and the process proceeds to step 43. In processing step 43, the copy control signal generation unit 12 outputs a signal whose ID6 becomes "oO" to the subcode encoder.The tape thus digitally copied from the BS tuner is played back by the DAT, and the played digital output is When the signal is digitally copied using another DAT, since the ID6 of the reproduced signal is "OQ", the copy control signal discriminator 2
2 outputs a command to the copy prohibition pit setting section 29 not to add a copy prohibition bit, and outputs a command to the category code setting section 30 to output a category code indicating KDAT. In processing step 51, the copy prohibition bit setting unit 29 sets the channel status encoder 23 to indicate that bit 2 of the channel status is 11''.
Output the command so that If you try to record the signal from the digital output terminal 26 reproduced in this way by connecting it to the digital input terminal 3 of another DAT, it will not be possible to record because it does not contain copy prohibition pits. Digital copying is possible.

Further, in the case of analog copying, since the analog copy prohibition signal is not included in the judgment step 56, the process proceeds to the processing step 46, and the copy control signal generating unit 12 instructs the subcode encoder 13 that IDe becomes "o1°". A control signal is output as follows.Next, processing step 63 is reached,
The subcode signal including ID6 and the output signal of the selection switch 6 can be recorded on the magnetic tape 9, and thus the second
You can make generational tapes.

Next, record the signal input from analog input terminal 1,
The case of digital copying and analog copying of this tape will be explained.

When the input selector switch of the operating switch 140 is set to analog recording and the recording switch is pressed, analog recording is determined in the judgment step 37, and the digital signal is input to the analog input terminal 1 and sent to the AD converter 2 in the processing step 44. The converted signal is input to the selection switch.

The input setting section 15 connects the selection switch 5 to the Muku converter 2.
A trap control is performed to select the output of , and a decision step 56 is reached. Since the analog output signal from a device other than the DAT, such as a CD player, does not include an analog copy prohibition signal, processing proceeds to step 45. In processing step 46, a control signal is output to the copy control signal generation unit 12 so that IDa becomes "01". Next, in processing step 53, 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 digitally copying a first generation tape to create a second generation tape, when the first generation tape is played back, at the end of judgment step 4, the copy control signal determination unit 22 determines that IDe is “01”.
Therefore, from Table 2, copy prohibition pit setting section 29
In processing step 48, the copy prohibition pit setting section 29 outputs a command to add a copy prohibition pit to the channel status encoder 23, and the analog copy prohibition signal generation section 32, a command is outputted to add an analog copy prohibition signal to the analog output signal. Next, in judgment step 49, the copy control signal determining unit 22 outputs a command to the category code setting unit 30 to output a category code compatible with DAT-C. Processing step 5
At 0, the category code setting section 30 outputs a command to the channel status encoder 23 to output an 8-pit category code indicating that digital copying is possible regardless of whether or not copying is prohibited. The signal from the digital output terminal 26 including this signal is transferred to another DA.
When digital recording is performed with T, the category code determining unit 11 determines that it is DAT-C in judgment step 40, and proceeds to processing step 42. Finally, the copy control signal generator 12 sets ID6 to be "10" from Table 1.The tape recorded in this way is a second generation tape.Similarly, the second generation tape is When a third generation tape is created by digital copying, when the second generation tape is played back, the copy control signal determination section 22 determines that ID6 is 4"1o". Therefore, in the same way as tapes recorded and played back from analog compact discs, the following digital copies are impossible.

In addition, when analog recording is made to a compact disc and the played tape is to be copied analogously, judgment step 5 is performed in the same way as when copying a compact disc digitally.
6, in order for the analog copy prohibition signal determination unit 31 to determine the analog copy prohibition signal, processing step 41 is performed.
, and recording becomes impossible. Therefore, multi-generation copying by analog copying becomes impossible.

As described above, whether or not digital recording is possible is determined from the copy prohibition bit and category code of the channel status included in the digital signal connecting between DATs, and the presence or absence of the analog copy prohibition signal included in the analog signal is determined. The main ID ID6, which is a 2-bit copy control subcode to be recorded on the tape, is determined from the recording prohibition setting section that determines whether analog recording is possible or not, and the copy control signal and the output signal from the input setting section. From the copy control signal generator obtained and the ID6 value reproduced during reproduction,
By setting the copy prohibition bit and category code and controlling whether or not to add the analog copy prohibition signal to the analog output signal, it is possible to digitally copy the signal once even if it includes the copy prohibition bit. Since the output signal includes the DATO category code, multi-generation digital copying is impossible. Furthermore, even if copy-prohibited analog copies are made, analog copies over multiple generations can be avoided.

Furthermore, if the added analog copy prohibition signal is set at a minute level and outside the audible band, the sound quality will not be impaired.

The above explanation has been made using a DAT with a built-in AD converter and DA converter as an example, but AD converters and DA converters that can be connected to a recording/reproducing device can be configured as follows, similar to the present invention. It goes without saying that the number of analog copies and digital copies can be limited and is included in the present invention. That is,
When the analog input signal includes an analog copy prohibition signal, the AD converter adds a copy prohibition bit to the digital output signal, and when the digital input signal includes the copy prohibition bit, the DA converter adds an analog copy prohibition bit to the analog output signal. Add a prohibition signal.

Furthermore, the present invention prevents the creation of digital copies or reproductions with analog signals over multiple generations, and prevents reproductions that have deteriorated sound quality or are significantly inferior in performance and quality to the original. In different cases, there is no need to restrict copying as in the present invention.

Effects of the Invention As described above, the present invention provides a copy prohibition bit determination unit that determines whether a digital signal connected between devices has a copy prohibition focus indicating whether or not digital copying is possible, and a category that indicates from which device the digital signal is output. A category code discrimination section that discriminates the code; an input setting section that selects digital copy or analog copy; and an analog copy prohibition signal discrimination section that discriminates from the analog input signal whether or not there is an analog copy prohibition signal that indicates prohibition of analog copy. , a copy control signal for obtaining a copy control subcode signal consisting of 2 bits indicating whether or not the reproduced signal can be copied from the output signal of the copy prohibition bit determination unit, the output signal of the category code determination unit, and the output signal of the input setting unit; a copy control signal determining section that determines a copy control subcode signal when reproducing a recorded signal; and a copy control signal determining section that sets a copy prohibition bit that is attached to a digital output signal from the output signal of the copy control signal determining section. A prohibition pit setting section, a category code setting section for setting a category code, an output signal of the copy prohibition bit discriminating section, an output signal of the category code discriminating section, and an output signal of the analog copy prohibition signal discriminating section to the recording medium. The number of digital copies can be limited by providing a recording prohibition setting section for prohibiting the recording of data, and an analog copy prohibition signal generation section that generates an analog copy prohibition signal from the output signal of the copy control signal determination section. . Therefore, there will be no disadvantage to the software industry such as music.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a DAT according to an embodiment of the present invention, and FIG.
The figure is a flowchart showing part of the processing of the system controller in Figure 1.
−° ,・・−
1. The Goddess I〒Down bite H Reincarnation--Conflict Q
・ , l Roll #! j# Figure 3 is a block diagram showing the connection of audio equipment centered on conventional DAT, Figure 4 is a format diagram showing the main parts of the signal format of a digital audio interface, and Figure 5 is a recording format of DAT. FIG. 3...Digital input terminal, 10...Copy prohibition bit determination section, 11...Category code discrimination section, 12...Copy control signal generation section, 1
3...Subcode encoder, 21...
- Subcode decoder, 22... Copy control signal determination section, 23... Channel status encoder, 26... Digital output m-child, 27...
...System controller, 29...Copy prohibition bit setting unit, 30...Category code setting unit, 31...Analog copy prohibition signal determination unit, 32... -Analog copy prohibition signal generation section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure I + 0DODOQ: OAT Figure 5 Ul, ll Woodman^ Procedural Amendment April 1988! 7th day

Claims (1)

[Claims] A copy prohibition bit determination unit that determines whether or not there is a copy prohibition bit that indicates whether or not digital copying is possible in a digital signal that connects devices; a category code determination unit that determines a category code that indicates which device has output the digital signal; An input setting section for selecting copy or analog copy,
an analog copy prohibition signal determination unit that determines the presence or absence of an analog copy prohibition signal indicating prohibition of analog copy from an analog input signal, an output signal of the copy prohibition bit determination unit, an output signal of the category code determination unit, and the input setting unit. a copy control signal generation unit that obtains a copy control subcode signal consisting of 2 bits indicating whether or not the reproduced signal can be copied from the output signal of the output signal; and a copy control signal determination unit that determines the copy control subcode signal when reproducing the recorded signal. a copy prohibition bit setting section for setting a copy prohibition bit added to the digital output signal from the output signal of the copy control signal discriminating section; a category code setting section for setting a category code; and a copy prohibition bit discriminating section. A recording prohibition setting section for prohibiting recording on a recording medium from the output signal, the output signal of the category code discriminating section, and the output signal of the analog copy prohibition signal discriminating section; It is equipped with an analog copy prohibition signal generation section that generates a copy prohibition signal, and prohibits recording of digital signals including a copy prohibition bit and a category code indicating the recording/playback device, and analog signals including an analog copy prohibition signal. and a recording/reproducing device configured to limit the number of digital copies.