JPH08212699A - Recording and reproducing device - Google Patents

Abstract

PURPOSE: To realize prevention of copy and to restore the original from a copy even if the original is lost by providing a copy prohibiting means selecting a second recorded signal processing mode of a recorded signal processing means. CONSTITUTION: In a copy inhibited state, since an inhibition detecting section 6 outputs a copy-inhibited state, scramble data is bit-inversed by a inversing section 24, it is converted into scramble data being different from data at the time of normal recording, exclusive OR of block data and scramble data is made by a scramble section 15 and deviation of data is eliminated. Block data after scramble generated thus is modulated and a modulation data train is generated. A synchronizing signal pattern is generated by a synchronizing signal generating section 17, block data is outputted serially by a synchronizing adding section 18 and a recorded signal is generated. Therefore, a normal reproduced signals obtained by providing a device in which scramble processing at the time of reproducing is performed by bit-inversing and reproduction can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus effective for use in a copy protection system such as a VTR.

[0002]

2. Description of the Related Art At present, not only DAT which digitizes and records and reproduces audio signals, but also VTR which digitizes and records video signals for the purpose of improving high image quality and dubbing characteristics in the video field (hereinafter referred to as D-VTR). ) Is under development. In these devices such as DAT and D-VTR, there is no dubbing deterioration due to digital recording / playback.
From the viewpoint of copyright protection when copying music or video, a function to prevent copying is particularly required.

A conventional copy protection system will be described below. As an example, a VTR that detects a copy inhibition signal having a waveform superimposed in the blanking period of a video signal to prevent copying will be described. FIG. 11 shows a block diagram of a conventional recording / reproducing apparatus.

In FIG. 11, an input interface section 31 (abbreviated as an input I / F section in the figure) receives an input video signal and outputs a signal to a recording section 32 and a prohibition detecting section 34. The recorded video signal is subjected to processing such as modulation to generate a recording signal, and the magnetic tape 33 as a medium is used.
The prohibition detection unit 34 is a circuit for detecting the copy prohibition signal in which the waveform is superimposed in the blanking period of the received video signal, and outputting the copy prohibition / permission state to the recording unit 32.

The operation of the conventional recording / reproducing apparatus configured as above will be described. First, in the recording in the copy-permitted state, the copy-prohibited signal is not superimposed during the blanking period, and the output signal of the prohibition detector 34 outputs the signal in the record-permitted state. In this case, the recording unit 32 modulates the video signal as usual and records it on the magnetic tape 33. On the other hand, in the recording of the copy prohibition state, the copy prohibition signal is superimposed during the blanking period, and the prohibition detection unit 34
Detects this and outputs a signal indicating the recording prohibited state to the recording unit 32 as an output. In this case, the recording unit 32 does not perform a recording operation such as modulation and does not record on the magnetic tape.

As described above, when the copy prohibited state is detected, the recording operation itself is not performed and nothing is recorded on the medium to prevent copying.

[0007]

In this recording / reproducing apparatus, it is required that the recording operation itself is not stopped in the recording in the copy prohibited state and that it surely functions as copy protection. For example, in the conventional configuration, since the recording operation itself is not performed in the copy-prohibited state, it is important if the user erases or overwrites the original without making the user aware of the copy-prohibited state. However, there is a problem that it becomes impossible to restore various data.

The present invention solves such a problem, and realizes copy prohibition by generating and recording a recording signal such that a recorded signal is not normally reproduced in a normal reproducing system, and erasing. Another object is to provide a recording / reproducing apparatus that solves the above problems by enabling a specially prepared reproducing device to restore a normal signal (data) even if the original is lost in the overwriting. And

[0009]

In order to solve this problem, the present invention provides a first recording signal processing mode for converting an input signal into a recording signal which can be reproduced by a normal reproducing system at the time of recording, and a modulation system. Second recording signal processing of a processing type different from the first recording signal processing mode so as to change, convert at least a part of the recording signal (data), or change the time-series recording order on the medium. Mode, the copy prohibiting means selects the second recording signal processing mode of the recording signal processing means in recording in the copy prohibiting state.

As a result, in the copy-prohibited state, the signal is recorded in a recording form different from that in the copy-permitted state, so that the original data cannot be restored by the same reproduction method as in the copy-permitted state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is such that at least a data signal to be recorded in the first recording signal processing mode by processing digitized data to generate a recording signal. Recording signal processing means having a second recording signal processing mode for converting a part of data in a predetermined format, reproduction signal processing means for restoring a recorded signal from a reproduction signal at the time of reproduction, and recording and reproducing the signal on a medium. The recording / reproducing means and the copy prohibiting means for selecting the second recording signal processing mode of the recording signal processing means in recording in the copy prohibited state are provided. In the second recording signal processing mode, the normal Since there is a data conversion different from the recorded data of 1, the original data cannot be restored by normal reproduction.

According to a second aspect of the present invention, the digitized data is processed to generate a recording signal, and the processing order of the data processed in time series is changed with respect to the first recording signal processing mode. Then, the recording signal processing means having a second recording signal processing mode for changing the recording order on the medium, the reproduction signal processing means for restoring the recorded signal from the reproduction signal at the time of reproduction, and recording and reproducing the signal on the medium. The recording / reproducing means and the copy prohibiting means for selecting the second recording signal processing mode of the recording signal processing means for recording in the copy prohibited state are provided. In the second recording signal processing mode, normally, Since the processing order of the recorded data is different from the processing order of the recorded data, the normal reproduction reproduces the data whose order is replaced with the original data and cannot restore the original data.

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram of a recording / reproducing apparatus according to Embodiment 1 of the present invention. As an example, copy inhibition is performed by detecting a copy inhibition signal waveform-superimposed in a blanking period of a video signal. The case of VTR will be described.

In FIG. 1, an input interface section (indicated as an input I / F section in the figure) 1 receives an input video signal and outputs a signal to a signal processing section 2 and a prohibition detecting section 6, a signal processing section 2 Converts the received video signal into digital data, performs processing such as error correction code encoding processing and modulation processing to generate a recording signal, outputs the recording signal to the recording / reproducing unit 3, and the signal reproduced by the recording / reproducing unit 3. Is subjected to demodulation, error correction, etc. to be restored, converted into an analog signal, and output to an output interface section (labeled as an output I / F section in the figure) 5. The recording / reproducing section 3 is a magnetic tape 4 which is a medium.
The recording / reproducing electromagnetic conversion circuit, the output interface unit 5 outputs the reproduced signal to the outside, and the prohibition detecting unit 6 detects the copy prohibiting signal whose waveform is superimposed in the blanking period of the received video signal. , A circuit for outputting a recording mode signal indicating a copy prohibited / permitted state to the signal processing unit 2.

FIG. 2 is a block diagram showing the detailed structure of the signal processing unit 2. The data processing unit 11 converts the received video signal into digital data and performs coding / correction processing of error correction code and the like. Circuit for performing processing, ID generation unit 12
Is a circuit for generating identification data (block address etc.) necessary for a block which is a recording / reproducing unit, and the ID adding unit 13
Is a circuit that adds the identification data generated by the ID generation unit 12 to the series of data processed by the data processing unit 11 to form blocks, and the scramble data generation unit 14 generates scramble data for eliminating the bias of the block data. A pseudo random code generator such as an M sequence, a scrambler 15 for calculating an exclusive OR of scrambled data and block data, and a modulator 16 for recording the scrambled data on the magnetic tape 4. A circuit that performs modulation processing, a synchronization signal generation unit 17 is a circuit that generates a synchronization pattern for data block detection, and a synchronization addition unit 1
A circuit 8 adds the synchronization pattern to the data block to generate a final recording signal.

The sync detector 19 detects a sync signal for each block from the reproduced signal and punches out the block, and the demodulator 20 demodulates the modulated block signal to restore the original block data. The descramble data generation unit 21 includes a scramble data generation unit 14
The pseudo-random code generator that has the same configuration as the above and generates the same descramble data as the scramble data used at the time of normal recording, and the descramble unit 22 originally takes the exclusive OR of the demodulated block data and the descramble data. Arithmetic circuit for restoring block data of I,
The D protection unit 23 is a circuit for taking out only the ID portion of the descrambled block data and correcting the missing ID or error and protecting it by utilizing the continuity of the address information of consecutive blocks.

The inversion unit 24 is a circuit for controlling the scramble data according to the recording mode signal (copy prohibition enabled state). In the copy prohibited state, the scrambled data of the recording system is bit-inverted into another form of scrambled data. It is an arithmetic circuit that changes and does not invert bits in the copy enabled state, and outputs the original scramble data exactly the same as the descramble data used in the playback system,
This is a circuit for performing an exclusive OR operation of the scramble data and the recording mode signal.

The operation of the recording / reproducing apparatus configured as above will be described. First, the recording operation when copying is permitted will be described. The waveform of the copy prohibition signal is not superimposed on the blanking of the video signal which is the input signal, and the prohibition detection unit 6 outputs the copy permission state. In this case, the signal processor 2 operates as follows.

First, the data processing unit 11 digitizes the input signal and performs preprocessing such as coding of error correction code.
As a result, a series of preprocessed data is generated as shown in FIG. For this series of data, the block address and block attribute information ID0, ID
The ID generation unit 12 generates ID data composed of the data of 1 and the IDP which is the parity of both, and the ID addition unit 1
3 is added to form a block as shown in FIG. Figure 3 for this block data
The scramble data shown in (c) is generated by the scramble data generator 14, and the scramble unit 15 takes an exclusive OR with the scramble data. Here, the scramble data is for eliminating data bias so that stable modulation characteristics can be obtained regardless of the recording data. In this scramble processing, the prohibition detection unit 6 outputs the copy permission state, so the inversion unit 24 does not perform bit inversion of the scrambled data, but applies the same scramble as in the normal recording. The scrambled block data generated in this way is modulated to generate a modulated data string shown in FIG. In addition, a sync signal generation unit 17 generates a sync signal pattern of a block required for reproduction, and a sync addition unit 18 serially outputs the modulated block data following the sync signal to generate a recording signal.

In reproducing the magnetic tape recorded in this state, the recording / reproducing unit 3 equalizes the waveform of the reproduced signal from the magnetic tape 4 and extracts the reproduced clock by the PLL structure to restore the bit string recorded on the magnetic tape 4. Then, the synchronization signal detection unit 19 of the data processing unit 2 detects the synchronization pattern attached to each block and punches out the data block. After that, the data block is demodulated by the demodulation unit 20 to restore the recorded data block, the descramble data generation unit 21 generates the same scramble data as at the time of recording, and the descrambling unit 22 reproduces the reproduced block data and the descramble data. The original data block is obtained by exclusive ORing with the data. ID data (ID0, ID1, IDP), which is the attribute information of the block, is extracted from this reproduced data block, and the ID protection unit 23 detects an error by the ID parity and a protection process using the continuity of the ID data and the periodicity of the synchronization pattern. Then, an effective data block that is judged to have no error or is highly reliable as a data block is output to the data processing unit 11, and the data processing unit 11 performs error correction code correction processing and the like to convert the digital data into analog data. A reproduced signal is obtained by converting the signal.

As described above, when copying is permitted, since the scramble data at the time of recording and the scramble data at the time of reproducing are the same, the recorded data can be restored at the time of reproducing.

Next, the recording operation when copying is prohibited will be described. The copy inhibition signal is in a state in which the waveform is superimposed on the blanking of the video signal which is the input signal, and the inhibition detection unit 6 outputs the copy inhibition state. In this case, the signal processing unit 2
Operates as follows.

First, the data processing unit 11 digitizes the input signal and performs preprocessing such as coding of error correction code.
As a result, a series of preprocessed data is generated as shown in FIG. For this series of data, the block address and block attribute information ID0, ID
The ID generation unit 12 generates ID data composed of the data of 1 and the IDP which is the parity of both, and the ID addition unit 1
By adding at 3, a block as shown in FIG. 4B is formed. Figure 4 for this block data
The scramble data shown in (c) is generated by the scramble data generator 14. The above processing is the same as in the copy permitted state. On the other hand, in the copy-prohibited state, the prohibition detection unit 6 outputs the copy-prohibited state, so the inversion unit 24 performs bit inversion of the scrambled data and converts it into scrambled data different from that at the time of normal recording shown in FIG. ,
The scramble unit 15 takes an exclusive OR of the block data and the scramble data to eliminate the data bias. The scrambled block data thus generated is modulated to generate the modulated data string shown in FIG. In addition, a sync signal generation unit 17 generates a sync signal pattern of a block required for reproduction, and a sync addition unit 18 serially outputs the modulated block data following the sync signal to generate a recording signal.

The reproduction of the magnetic tape 4 recorded in this state is exactly the same as the reproduction in the copy-permitted state. The synchronization signal detecting unit 19 detects the synchronization pattern of the block from the reproduction bit string, punches out the data block, and the demodulation unit. 20 demodulates and restores the recorded data block, the descramble data generation unit 21 generates the same scramble data as when copying is permitted, and the descramble unit 22 performs the exclusive OR of the block data and the descramble data. Then, the data block which is determined as an original data block by the ID protection unit 23 and is determined to be a valid data block is output to the data processing unit 11, and an attempt is made to obtain a reproduced signal by performing error correction code correction processing and the like.

However, in the recording of the copy prohibited state,
Since the scramble data at the time of recording is different from the descramble data at the time of reproducing, the ID data (ID0, ID) which is the attribute information of the extracted block in the ID protection unit 23.
1, the IDP) is not correctly restored, the parity detection becomes an error, or the continuity of the ID is impaired, and a valid data block cannot be obtained. Even if it is determined that the block is a valid data block, the data in the block is also destroyed by descrambling different from that at the time of recording, and the error correction processing of the data processing unit becomes uncorrectable, making it impossible to restore normal data. Become.

As described above, according to the present embodiment, by changing only the scramble processing in the scramble processing, the data block is judged to be invalid in normal reproduction, or it becomes uncorrectable at the time of error correction and becomes normal. This makes it impossible to perform proper reproduction. Moreover, since only the scrambled data is changed, the recording form on the magnetic tape is exactly the same, and since there is no change in the modulation characteristics etc. necessary for tracking at the time of reproduction, the operation itself at the time of reproduction is It has no effect and only the data is unrecoverable. Therefore, it is possible to obtain a normal reproduction signal by preparing a device that can perform bit inversion reproduction as in the case where the descrambling process during reproduction is in the copy prohibited state, and when the original tape is lost by overwriting or erasing Also, the recorded contents can be restored from the copied tape.

In this embodiment, the reversal unit 24 changes the scramble data to realize the copy prohibition. However, only the ID generation value indicated by the arrow A in FIG. Even if the synchronization pattern indicated by the arrow B is changed so that the data blocks cannot be synchronized, a valid data block cannot be obtained and the same effect can be obtained.

The same effect can be obtained by converting the input signal itself indicated by the arrow C in FIG. 2 into another data format or the like by a predetermined procedure.

(Second Embodiment) Next, a recording / reproducing apparatus according to a second embodiment of the present invention will be described. FIG. 5 shows a detailed block diagram of the data processing unit 11 in FIG.
The D section 41 is a circuit for converting the received video signal into digital data, and the memory 42 is a memory for storing a data block converted into digital data by the A / D section 41 and a data block output from the reproduction deshuffling section 51, and a recording shuffling section. Reference numeral 43 denotes a circuit for performing shuffling by controlling a read address when reading a data block stored in the memory 42, and a data compression unit 44.
Is a circuit that performs compression processing with some data blocks transferred by the recording shuffling unit 43 as one compression unit, and the recording deshuffling unit 45 uses the recording mode signal to transfer the compressed data blocks transferred from the data compression unit. A circuit for controlling writing to the memory 46 according to the determined rule, the memory 46 is the recording deshuffling unit 4
5, the memory for storing the compressed data block transferred by 5 and the data block error-corrected by the error-correction decoding unit 48, the error-correction coding unit 47 is the memory 46.
Is a circuit for performing error correction coding on the compressed data blocks stored in the storage medium in the order stored and outputting as a recording block to which parity is added.

Further, the error correction decoding section 48 is a circuit for performing error correction processing on the reproduced recording block, and the reproduction shuffling section 49 reads out the error correction processed data block from the memory 46 according to a certain rule. The control circuit, the data decompression unit 50, the reproduction shuffling unit 49
The circuit for performing decompression processing on the compressed data block input from the reproduction deshuffling unit 51 controls the write address when writing the decompressed data block output from the data decompression unit 50 into the memory 42. Deshuffling circuit, D / A section 52
Is a circuit for converting the data block read from the memory 42 into an analog signal.

The operation of the recording / reproducing apparatus configured as described above will be described. First, the recording operation when copying is permitted will be described.

First, the A / D section 41 digitizes the input signal to form a data block. The data blocks digitized by the A / D unit 41 are sequentially written in the memory 42. The recording shuffling unit 43 generates an address for reading the data block from the memory 42 according to the shuffling rule, reads the data block from the memory 42, and transfers the data block to the data compression unit 44.

Now, the shuffling rule will be described. The shuffling is a process of making the amount of information uniform in one frame and compressing the image distortion due to the compression within the frame at the time of data compression to make deterioration due to the compression inconspicuous. FIG. 6 is a configuration diagram (conceptual diagram) of one frame of digitized image data output from the A / D unit 41. Each Ai, Bi, Ci of one square in FIG.
Di and Ei (i = 0, ..., 9) form one super block. FIG. 7 shows each super block Ai, Bi, Ci, Di,
It is a block diagram of Ei (i = 0, ..., 9). Each super block A
Each of i, Bi, Ci, Di, and Ei (i = 0, ..., 9) is composed of 27 data blocks (0 to 26 data blocks), and the A / D unit 41 performs recording shuffling. Part 42
Corresponds to the data block to be transferred to. Hereinafter, one data block will be represented as shown in (Equation 1).

[0034]

[Equation 1]

In the recording shuffling unit 43, the data compression unit Vij, which is composed of five data blocks shown in _{(Equation 2), is} sequentially compressed from the left data block C _{(i + 2) mod10, j.} 44.

[0036]

[Equation 2]

Next, the data compression unit 44 performs data compression processing on the data block output from the recording shuffling unit 43 for each data compression unit Vij. The recording deshuffling unit 45 determines that copying is permitted by the recording mode signal, generates an address to be written in the memory 46 according to the deshuffling rule which is the reverse process of the shuffling rule, and writes the data block in the memory 46. Here, the data block is stored in the memory 46 with the same configuration as in FIG.

The error correction coding unit 47 performs error correction coding on the data blocks stored in the memory 46 in the order in which they are stored, adds parity, and outputs the data as a recording block. The recording block output from the error correction encoding unit 47 is recorded on the magnetic tape after being subjected to modulation processing. The reason why deshuffling is performed and the data is recorded on the magnetic tape is that data reproduced simultaneously during variable speed reproduction is continuous on the screen so that the image during variable speed reproduction can be easily viewed.

FIG. 8 shows a format in which recording blocks are recorded on the magnetic tape 4. One frame of image data is recorded on 10 tracks on the magnetic tape, and one track is composed of 135 recording blocks. Numerical values on the tracks in FIG. 8 indicate the position of each recording block on each track.

FIG. 9 shows recording positions corresponding to data blocks on the magnetic tape recorded in the recording permission mode. 5 data blocks as an example
_{A 0,0, B 0, 0,} C 0,0, D 0,0, indicating the recording position corresponding to the E _0,0. With a magnetic tape recorded in the recording permission mode, the recording order is the same as the one-frame configuration of image data.

Next, the reproducing operation from the magnetic tape recorded in the recording permission mode will be described. Recording / playback unit 3
Are sequentially reproduced from the recording block at position 0 of track 0 on the magnetic tape 4. The reproduced recording block is demodulated and then input to the error correction decoding unit 48. The error correction decoding unit 48 performs error correction processing on the reproduced recording blocks in the order in which they are reproduced, and writes them in the memory 46 in the order in which they were reproduced. The reproduction shuffling unit 49 generates a read address from the memory 46 according to the shuffling rule, reads the error-corrected data block from the memory 46, and then the data expansion unit 5
Output to 0. In the data decompression unit 50, the data compression unit V
The expansion processing is performed for each ij, and the reproduction deshuffling unit 51
Then, according to the deshuffling rule which is the opposite rule to the shuffling rule, a write address for the memory 42 is generated and the data block is written to the memory 42. Memory 42
The data blocks written in the memory are read in the order in which they are written in the memory 42, converted into analog signals by the D / A section 52, and output.

In the case of the reproducing operation from the magnetic tape 4 recorded in the recording permission mode as described above, the D / A section 5
The order of the data output from 2 is the same as the order of the data input during recording, and a correct image is restored.

Next, the recording operation when copying is prohibited will be described. Since the recording operation when the copy is prohibited is different from the recording operation when the copy is permitted, only the process of the recording deshuffling unit 45 will be described. When the copy is prohibited, the recording deshuffling unit 45 determines that the copy is prohibited by the recording mode signal. When it is determined that copying is prohibited, the recording deshuffling unit 45 sequentially writes the data blocks sent from the data compression unit 44 into the memory 46. Memory 46
The data block written in is the error correction code processing,
After the modulation processing, it is recorded on the magnetic tape 4.

FIG. 10 shows the recording positions corresponding to the data blocks on the magnetic tape 4 recorded in the recording prohibition mode. 5 data blocks A as an example
_The recording positions corresponding to _0,0 , B _0,0 , C _0,0 , D _0,0 and E _0,0 are shown. In the structure of the recording blocks on the magnetic tape 4 recorded in the recording prohibition mode, the positions of continuous data blocks on the screen are dispersed in one frame.

Next, the reproducing operation from the magnetic tape recorded in the recording prohibition mode will be described. The reproducing operation from the magnetic tape recorded in the recording prohibition mode is the same as the reproducing operation from the magnetic tape 4 recorded in the recording permission mode described above. In the image reproduced from the magnetic tape recorded in the recording prohibition mode, the positions of consecutive data blocks are dispersed in one frame,
It cannot be restored as a normal image.

As described above, according to the second embodiment of the present invention, by changing only the writing position of the data block in the memory 46 at the time of recording, the magnetic tape recorded in the recording-prohibited mode is normally reproduced. This makes it impossible to restore a normal image. Further, since the processing of the recording deshuffling unit 45 is performed before the error correction coding and the modulation processing, the operation itself at the time of reproduction is not affected at all, and it cannot be restored as a normal image. Therefore, when the processing of the reproduction shuffling unit 49 at the time of reproduction is read from the memory 46, a normal image can be restored if a device capable of performing read control in the same order as stored in the memory 46 is prepared. Even if the original tape is lost by overwriting or erasing, the recorded contents can be restored from the copied tape.

[0047]

As described above, according to the present invention, in the recording in the copy-prohibited state, the modulation method is changed, at least a part of the recording signal (data) is converted, or the time-series recording on the medium is performed. With the configuration in which the recording order is changed and the copy prohibition process is performed, it is impossible to correctly restore the recorded signal (data) in normal reproduction, and it is possible to prevent the copy from being created. Moreover, since a specially prepared reproducing apparatus records in a state in which correct restoration is possible, even if the original is lost, it is possible to restore from the copied medium. Further, it is possible to surely make the reproduction impossible with a very simple structure, and the effect is great.

As described above, the present invention exerts a great effect by actually using it in a copy protection system such as a VTR.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a signal processing unit in the recording / reproducing apparatus.

FIG. 3 is a schematic diagram showing a recording process when copying is permitted in the recording / reproducing apparatus.

FIG. 4 is a schematic diagram showing recording processing when copying is prohibited in the recording / reproducing apparatus.

FIG. 5 is a block diagram showing a configuration of a data processing unit of a recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 6 is a block diagram of a 1-frame super block.

FIG. 7 is a block diagram of one super block.

FIG. 8 is a diagram showing a recording format of a magnetic tape.

FIG. 9 is a diagram showing an example of recording positions on a magnetic tape recorded in a recording permission mode.

FIG. 10 is a diagram showing an example of recording positions on a magnetic tape recorded in a recording prohibition mode.

FIG. 11 is a block diagram showing a conventional recording / reproducing apparatus.

[Explanation of symbols]

 1 Input I / F section 2 Signal processing section 3 Recording / reproducing section 4 Magnetic tape 5 Output I / F section 6 Prohibition detecting section 11 Data processing section 12 ID generating section 13 ID adding section 14 Scrambled data generating section 15 Scrambler section 16 Modulating section 17 synchronization signal generation unit 18 synchronization addition unit 19 synchronization detection unit 20 demodulation unit 21 descramble data generation unit 22 descramble unit 23 ID protection unit 24 inversion unit 41 A / D unit 42 memory 43 recording shuffling unit 44 data compression unit 45 Recording deshuffling unit 46 Memory 47 Error correction coding unit 48 Error correction decoding unit 49 Reproduction shuffling unit 50 Data expansion unit 51 Reproduction deshuffling unit 52 D / A unit

Claims (5)

[Claims] 1. A first recording signal processing mode for converting an input signal into a recording signal which can be reproduced by an ordinary reproducing method at the time of recording, and a second recording method which is different from the first recording signal processing mode.
A recording signal processing means having a recording signal processing mode of
What is claimed is: 1. A recording / reproducing apparatus comprising: a reproduction signal processing means for restoring a recorded signal from a reproduction signal at the time of reproduction; and a recording / reproducing means for recording / reproducing a signal on / from a medium. A recording / reproducing apparatus having copy prohibiting means for selecting the second recording signal processing mode. 2. The recording signal processing means has two modulation means having different modulation methods, and the copy prohibition means switches between the two modulation methods according to a copy prohibition / permission state. Recording and reproducing device. 3. The recording signal processing means has a second recording signal processing mode for changing at least a part of the recording signal in a predetermined format with respect to the first recording signal processing mode, and the copy prohibiting means comprises: 2. The recording / reproducing apparatus according to claim 1, wherein two recording signal processing modes are switched according to a copy prohibition / permission state. 4. The recording signal processing means processes the digitized data to generate a recording signal, and at least a part of the data signal to be recorded in the first recording signal processing mode has a predetermined format. 2. The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus has a second recording signal processing mode which is converted by the above method, and the copy prohibiting means switches between the two recording signal processing modes according to a copy prohibition / permission state. 5. The signal processing means processes the digitized data to generate a recording signal, and changes the processing order of the data processed in time series with respect to the first recording signal processing mode, 2. The recording according to claim 1, further comprising a second recording signal processing mode for changing a recording order on the medium, wherein the copy prohibiting means switches between two recording signal processing modes according to a copy prohibition / permission state. Playback device.