JP2001210007A - Recorder, and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to record data on a recording medium at a high speed, and also reproduce recorded data during recording. SOLUTION: AV data supplied from a data supply source 1 are stored once in a storage device 5 as noncompressed data 22 in an original data form via a path 2, a system bus 3, and a path 21. The stored noncompressed data 22 are processed during the time when a compression-ciphering/expansion-decoding device 6 can be used and are stored as compressed data 18, while the corresponding noncompressed data, which have become unnecessary, are deleted. The compression-ciphering/expansion-decoding device 6 has a compression-ciphering part 7, an expansion-decoding part 8, and a by-pass 24 not passing through the expansion-decoding part 8. During recording, this device is able to reproduce optional compressed data 18 stored in the storage device 5, or data themselves being recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device and a recording / reproducing device for, for example, audio data and / or video data.

[0002]

BACKGROUND OF THE INVENTION Audio and / or data from data sources
Or video data (hereinafter simply referred to as AV data)
Can be recorded on a hard disk device of a personal computer (personal computer) and output from the hard disk device. FIG. 5 shows an example of such a recording / reproducing apparatus. In FIG. 5, reference numeral 1 denotes a data source, for example, a CD (Compact Disc) -ROM drive. CD-R
For example, a CD-DA (Digital Audi)
o) is played and audio data can be played. CD
-Not limited to the ROM drive, a CD player may be used as the data supply source 1. AV from data source 1
Data is supplied to the system bus 3 via the path 2.

[0005] A CPU 4, a storage device (for example, a hard disk device) 5, a compression / encryption /
The decompression / decoding device 6 is connected. This configuration is realized by a general personal computer, and the whole or a part of the compression / encryption / decompression / decryption device 6 may be realized by software. The CPU 4 performs data transfer, write / read operations of the storage device 5, compression /
The operation of the encryption / decompression / decryption device 6 is controlled.

The compression / encryption / expansion / decryption device 6 has a compression / encryption unit 7 and an expansion / decryption unit 8. compression·
The encryption unit 7 performs compression encoding on the AV data received from the system bus 3 via the path 13 and performs encryption on the compressed data. The compressed and encrypted data is output to the system bus 3 via the path 14.

The storage device 5 stores compressed / encrypted data (hereinafter simply referred to as compressed data) 18 inputted from the system bus 3 via a path 17. The compressed data 18 is output to the system bus 3 via the path 19. By storing the compressed data in the storage device 5, the storage capacity of the storage device 5 can be effectively used. Further, by storing the encrypted data, the copyright of the AV data can be protected.

[0006] The decompression / decryption unit 8 receives the compressed data 18 from the storage device 5 via the system bus 3 and the path 15, and performs the decryption of the encryption and the decompression of the compression. The decrypted and decompressed data is sent to the system bus 3 via the path 16. Further, the AV data decoded and expanded by the expansion / decoding unit 8 is transmitted to the D / A
It is supplied to the converter 10. By the D / A converter 10,
The audio signal converted from digital to analog is taken out to the analog output unit 12.

When recording the AV data from the data supply source 1 in the storage device 5, (data supply source 1 → path 2 → system bus 3 → path 13 → compression / encryption unit 7 → path 14)
Data flows along the path of the system bus 3 → path 17 → storage device 5), and the compressed data 18 is stored in the storage device 5. When reproducing the compressed data 18 stored in the storage device 5, (storage device 5 → path 19 → system bus 3 → path 15 → decompression / decoding section 8 → path 9 → D / A converter 10 → analog output Data flows along the path of the unit 12).

[0008]

The above-mentioned recording / reproducing system has a problem that AV data from the data supply source 1 cannot be recorded at a high speed. CD player, CD
-A ROM drive, a DVD (Digital Versatile Disc or Digital Video Disc) drive or the like can transfer data at a high speed of N times, so that the data supply source 1 does not become a bottleneck in realizing high-speed recording. In addition, the path such as the path 2 and the system bus 3 can operate at high speed. Further, since the recording speed of the storage device 5 is sufficiently high, there is no problem. The problem is that the processing capability of the compression / encryption / decompression / decryption device 6 is low. This becomes a bottleneck in realizing high-speed recording, and the processing performance of the entire system is reduced by the apparatus
Was dependent on.

In order to enable high-speed recording of the system, a high-performance compression / encryption / decompression / decryption device 6 is required. However, data compression / encryption generally requires complicated arithmetic processing, making it difficult to increase the speed, and a high-speed device is expensive.

A compression / encryption / decompression / decryption device 6
Usually, since the compression / encryption unit 7 and the decompression / decryption unit 8 share some circuits, both cannot operate simultaneously. As a result, during recording of data, there is a problem that arbitrary data stored in the storage device 5 cannot be expanded / decoded.

Accordingly, an object of the present invention is to enable high-speed recording irrespective of the processing performance of data compression / encryption, and to simultaneously perform data compression / encryption for recording and storage of data. It is an object of the present invention to provide a recording device and a recording / reproducing device capable of reproducing different data.

[0012]

In order to solve the above-mentioned problems, the present invention is directed to an input means for inputting an uncompressed signal and a recording medium capable of recording and storing the uncompressed signal. Recording means for recording, compression means for compressing information on the uncompressed signal recorded on the recording medium, and non-compressed signal input from the input means once recorded on the recording medium by the recording means; Control means for compressing the compressed signal by the compressing means and recording the compressed signal on the recording medium again as a compressed signal.

According to a tenth aspect of the present invention, there is provided an input means for inputting an uncompressed signal, a recording means for recording the uncompressed signal on a recordable medium, and an uncompressed signal recorded on the recording medium. Compression / expansion means comprising a compression section for compressing information to generate a compressed signal, a decompression section for decompressing the information-compressed compressed signal recorded on the recording medium to generate a reproduction signal, and outputting the reproduction signal. In accordance with an output unit and a recording instruction from a user, an uncompressed signal input from the input unit is recorded on the recording medium by the recording unit, and the uncompressed signal once recorded on the recording medium is transmitted by the compression unit of the compression / expansion unit. The information is compressed and recorded as a compressed signal on the recording medium again, and the compression of the compressed signal stored in the recording medium is decompressed by the decompression unit of the decompression and decompression means in accordance with the user's reproduction instruction. A recording and reproducing apparatus and a control means for outputting from the output means the extended reproduction signal by.

According to the present invention, high-speed recording can be achieved by temporarily recording uncompressed data on a recording medium even if a low-speed processing compression / decompression device is used. Further, according to the present invention, since the compression process is not performed at the time of recording, even when only one compression / decompression device is provided, it is possible to perform reproduction simultaneously with recording.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. In one embodiment, the present invention is applied to a system similar to that of FIG. That is, AV data from the data supply source 1 is recorded in, for example, a storage device 5 (for example, a hard disk device) of a personal computer and output from the storage device 5. Data source 1 is C
Examples include a D-ROM drive, a CD player, and a DVD drive. The CD-ROM drive reproduces the CD-DA at N times speed (24 times speed, 48 times speed, etc.), whereby AV data is supplied to the system bus 3 via the path 2 at high speed. The data supply source 1 may be a receiver that receives data transmitted via a network, such as a music distribution system, instead of a recording medium playback device. Further, the data supply source 1 may be composed of a plurality of input devices such as these drives and receiving units, and a selecting unit that controls one of them.

CPU 4, storage device 5, compression / encryption / expansion / decryption device 6, operation unit 1 for system bus 3
3 and the display unit 14 are connected. The CPU 4 follows the program and receives an operation signal from the operation unit 13 to transfer data, write / read the storage device 5, operate the compression / encryption / expansion / decryption device 6,
The display operation of the display unit 14 is controlled. The operation unit 13 is a keyboard, a switch, a GUI, or the like operated by the user. When the user operates the operation unit 13,
An operation (recording operation, reproduction operation, etc.) is specified, and data to be recorded / reproduced is specified. The display unit 14 displays an operation state, data to be recorded / reproduced, and the like. The configuration in FIG. 1 is realized by a general personal computer, and the whole or a part of the compression / encryption / decompression / decryption device 6 may be realized by software.

The compression / encryption / expansion / decryption device 6 has a compression / encryption unit 7 and an expansion / decryption unit 8, and the compression / encryption unit 7 is connected to the system bus 3 via a path 13. Then, compression encoding is performed on the AV data received from the server, encryption is performed on the compressed data, and the compressed and encrypted data is output to the system bus 3 via the path 14.

The decompression / decryption unit 8 receives the compressed data 18 via the system bus 3 and the path 15 and performs encryption decryption and compression decompression. The decrypted and decompressed data is sent to the system bus 3 via the path 16. The AV data decoded and expanded by the expansion / decoding unit 8 is supplied to the D / A converter 10 via the path 9. An audio signal converted from digital to analog by the D / A converter 10 is extracted to an analog output unit 12.

In one embodiment, a path (referred to as a bypass) 24 that does not pass through the decompression / decryption unit 8 is provided inside or outside the compression / encryption / decompression / decryption device 6.
The AV data that has passed through the bypass 24 is
It is supplied to the A converter 10. The output of the decompression / decoding unit 8 and the data passed through the bypass 24 are selectively supplied to the D / A converter 10. This selection is controlled by the CPU 4.

In the storage device 5, AV data input from the system bus 3 via the path 17 is temporarily stored as uncompressed data 22, and thereafter, the compressed data 18 is stored. The compressed data 18 is output to the system bus 3 via the path 19. By storing the compressed data in the storage device 5, the storage capacity of the storage device 5 can be effectively used. Further, by storing the encrypted data, the copyright of the AV data can be protected.

As a compression method of AV data, when AV data is audio data, ATRAC (Adaptiv
e Transfer Acoustic Coding), MP3 (MPEG1 Audio L
ayerIII) or the like, and when the AV data is video data, MPEG or the like can be used. For example, ATRAC
Is used, the data can be compressed to 1/10 or less. Encryption methods include scramble, D
ES (Data Encryption Standard), embedding of digital watermark information, and the like can be used.

The AV data from the data source 1 is divided into blocks, for example, in units of prescribed capacity, and the compression / encryption unit 7 performs compression in units of blocks.
When ATRAC is used as compression encoding of audio data, the amount of data compressed by ATRAC or audio data of an integral multiple thereof is regarded as one block. In the case of video data, MPE is used as compression coding.
When G is used, one video frame or data of an integral multiple thereof is taken as one block. The sizes of these blocks are merely examples, and various sizes can be set.

In this embodiment, non-compressed and uncompressed data 22 other than the compressed data 18 is stored in the storage device 5. The uncompressed data is stored in the storage device 5 via the system bus 3 and the path 21 and output to the system bus 3 via the path 23. That is,
The AV data supplied from the data supply source 1 is temporarily stored in the storage device 5 as uncompressed data 22 via the path 2, the system bus 3 and the path 21 in the same data format.

As described above, since the AV data from the data source 1 is recorded in the storage device 5 as uncompressed data, it does not pass through the compression / encryption / decompression / decryption device 6. Thereby, high-speed recording can be performed by making the most of the capability of the data supply source 1. In addition, there is no need to use a device capable of high-speed processing (which is generally expensive) as the compression / encryption / expansion / decryption device 6.

Recording uncompressed data in the storage device 5 causes problems in terms of storage efficiency and copyright protection. The problem is that the data from the data source 1 is transferred to the storage device 5, the uncompressed data 22 is temporarily stored in the storage device 5, and finally the compressed and encrypted compressed data 18 is stored in the storage device 5. It is solved by memorizing. That is, the non-compressed data 22 once stored in the storage device 5 is processed at a time when the compression / encryption / decompression / decryption device 6 can be used, and is stored as the compressed data 18. The compressed data 22 is completely deleted.

The processing of compression / encryption and the processing of deletion of uncompressed data can be performed in the background while the system load is low, so that the processing does not affect the response speed of the processing selected by the user. In one embodiment, when the uncompressed data is thus compressed and encrypted, and the resulting compressed data is stored in the storage device 5, the corresponding uncompressed data is deleted (erased) from the storage device 5. You. The recording of the compressed data and the deletion of the corresponding uncompressed data are performed for each predetermined data amount such as a block unit or a file unit.

In one embodiment, only one compression / encryption / decompression / decryption device 6 is provided. Nevertheless, even at the time of data recording, the data being recorded or the storage device is stored. 5 can be reproduced.

When storing uncompressed data in the storage device 5, attribute data as shown in FIG. 2 is added by the CPU 4 to each file of uncompressed data, and the attribute data and uncompressed data are stored as uncompressed data 22 in the storage device. 5 is stored. In FIG. 2, reference numeral 22a denotes uncompressed data (AV
Data), and 22b is attribute data added for each file. In the case of audio data, one song is often associated with one file. In the case of video data, if a still image, one image is associated with one file; if it is a moving image, a series of moving images from the start of shooting to the end of shooting is associated with one file. There are many. The attribute data 22b includes a data size 31, a file name 32, a read permission flag 33
Etc. are included. The attribute data 22b is used for controlling the reading of data from the storage device 5.

The data size 31 indicates the file size of the uncompressed data. The file name 32 is the file name of the uncompressed data file provided from the data source 1. The file name 32 is not limited to the name given by the CPU 4, but can be given by a user operation. Further, in addition to specifying the file, the file name may be used to distinguish between compression and non-compression. The read permission flag 33 is a flag indicating whether or not uncompressed data can be read from the storage device 5. If the flag 33 indicates read permission,
The uncompressed data 22 can be read from the storage device 5. On the other hand, when the flag 33 indicates that reading is not permitted, reading is permitted only for compression / encryption by the compression / encryption unit 7. The compressed data 1
8, attribute data such as data size and file name is also added. The attribute data is stored in the storage device 5 as file management information.

One embodiment of the present invention will be described in more detail with reference to the flowcharts of FIGS. FIG. 3 shows a flow of processing when the recorded AV data is reproduced at a normal speed at the same time as the AV data is recorded at a high speed. FIG. 4 shows a flow of processing when other AV data (compressed data) is reproduced during high-speed recording of AV data. The processes shown in these flowcharts are controls performed by the CPU 4.

First, the flow of processing on the recording side in the processing of FIG. 3 will be described. The first AV data (first file) is supplied from the data supply source 1 (step S1), and the data is transferred to the storage device 5 via the path 2 and the system bus 3 at N times speed (step S2). .
In step S3, the uncompressed data 22 is stored in the storage device 5.
Is stored as In this case, the uncompressed data has a block unit.

In the next step S4, it is determined whether or not another AV data exists. In step S4,
If it is determined that another AV data exists, in step S5, another AV data is output.
The data source 1 is switched. For example, the drive is controlled so as to reproduce another song (track) on a CD.

In step S6, the n (= 2) th input AV data is supplied from the data supply source 1, and the data is transferred to the storage device 5 via the path 2 and the system bus 3 at N times speed (step S7). ). In step S8, the data is stored as uncompressed data 22 in the storage device 5.
Then, the process returns to step S4 to determine whether another AV data exists. If there is AV data to be recorded, the same recording processing as described above is repeated. Attribute data is added to the uncompressed data 22 recorded in the storage device 5, and the read permission flag 33 in the attribute data is set to indicate read permission or non-permission. For example, only one reading is permitted, and the second and subsequent readings are not permitted.

As described above, the processing for recording the uncompressed AV data does not require the processing of the compression / encryption / decompression / decryption device 6, so that the speed of the data supply source 1 is maximized by making the most of the capability of the data supply source 1. Recording becomes possible. In addition, as the compression / encryption / expansion / decryption device 6, an inexpensive device with low-speed processing can be used.

Next, in step S9, the storage device 5
, The uncompressed data 22 is read. The read uncompressed data is stored in the path 23, the system bus 3, and the path 13.
Is supplied to the compression / encryption unit 7 via the CPU and subjected to compression and encryption processing (step S10). The compressed data 18 is stored in the storage device 5 via the path 14, the system bus 3 and the path 17. Compressed data 18
The read permission flag in the attribute data added to is set to indicate read permission. Then, step S1
In step 2, the compression / encryption process is performed, and the same uncompressed data file as the data stored in the storage device 5 is deleted. This completes the high-speed recording process. The processing of compression / encryption (step S10) and the processing of deletion of uncompressed data (step S12) are performed in the background when the system load is low.

AV data to be recorded can be reproduced in parallel with the high-speed recording process described above. The processing on the reproduction side will be described. In step S21, asynchronously with the recording of the AV data in the storage device 5,
The uncompressed data 22 is read from the storage device 5. The reading of the uncompressed data 22 is performed at a normal speed.
The normal speed is relative to the speed (high speed) of the data source 1. For example, the rate of audio data when a CD-DA is reproduced at 1 × speed is the normal speed as in a normal CD player. When the AV data is written to the storage device 5 at high speed, while the uncompressed data 22 is read out asynchronously, the speed difference between the writing speed and the reading speed is absorbed by the storage device 5.

The read uncompressed data is transferred at a normal speed (step S22). Then, step S23
, The AV data is reproduced. That is, the read uncompressed data is stored in (path 23 → system bus 3).
→ bypass 24 → pass 9 → D / A converter 10 → pass 11
→ Reproduced on the path of the output unit 12). Thus, the compression / encryption / decompression / decryption device 6 is bypassed, and its function is not used. Therefore, the process of step S10 (compression and encryption of AV data) during high-speed recording can be performed without any trouble.

With reference to FIG. 4, a description will be given of a process for reproducing other AV data (compressed data) while AV data is being recorded at high speed. The processing of high-speed recording of AV data is the same as that shown in FIG. 3, and corresponding steps are denoted by the same reference characters and description thereof is omitted.

On the reproducing side, the compressed data 18 is read from the storage device 5 in step S25. The compressed data is supplied to the decompression / decryption unit 8 in the compression / encryption / decompression / decryption device 6 via the path (path 19 → system bus 3 → path 15), and , The compression encoding is decompressed (step S26). The AV data obtained by the decoding and decompression processing is (pass 9 → D / A
The signal is output to the output unit 12 at the normal speed via the path from the converter 10 to the path 11) (step S27). Thus, the AV data is reproduced (step S28).

In the reproduction process, compression / encryption / expansion
Since the decoding device 6 is used, steps S9, S1
0, S11 and S12 (compression and encryption of AV data and deletion of corresponding uncompressed data)
(Step S13). In step S13, when the compression / encryption / decompression / decryption device 6 is released, step S9 (read of uncompressed data) and step S10
(Compression and encryption of AV data), step S11
The processing up to (storing in the storage device 5) and step S12 (deletion of uncompressed data) is executed.

As can be seen from the processing shown in the flowchart of FIG. 4, unlike the AV data during high-speed recording, any compressed data 18 stored in the storage device 5 can be reproduced simultaneously with high-speed recording. is there.

Further, in the processing shown in FIG. 4, by using the read permission flag in the attribute data to prohibit the reading of uncompressed data from the storage device 5 other than the one used for compression, Reading of uncompressed data from the storage device 5 for a purpose other than being used may be prohibited.

In the embodiment, the compression and encryption processing and the decompression and decryption processing are performed, but it is not always necessary to perform the encryption and decryption processing. The present invention is also applicable to recording / reproduction of digital data such as computer software in addition to AV data. Further, in the present invention, a semiconductor memory such as a flash memory can be used as the storage device 5 in addition to the hard disk.

[0044]

As is apparent from the above description, according to the present invention, high-speed recording can be performed by temporarily recording AV data on a recording medium even if a low-speed processing compression / decompression device is used. Can be achieved. In the present invention,
As a hardware change, it is only necessary to add a path that bypasses the decompression process, so that there is an advantage that the burden of changing or adding hardware is small. Further, in the present invention, since no compression processing is performed at the time of recording, one compression /
Even when only the decompression device is provided, the recording and the reproduction can be performed at the same time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an entire system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating attribute data according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of a recording and reproducing operation according to an embodiment of the present invention.

FIG. 4 is a flowchart illustrating another example of a recording and reproducing operation according to an embodiment of the present invention.

FIG. 5 is a block diagram of an example of a recording / reproducing system for explaining the present invention.

[Explanation of symbols]

1 ... data supply source 3 ... system bus 4 ...
CPU, 5 storage device, 6 compression / encryption /
Decompression / decryption device, 7 ... compression / encryption unit, 8 ...
Decompression / decoding unit, 18: compressed data, 22: uncompressed data

Claims (21)

[Claims] An input means for receiving an uncompressed signal; a recording means for recording the uncompressed signal on a recording medium capable of storing the uncompressed signal; Compression means for compressing, an uncompressed signal input from the input means is once recorded on a recording medium by the recording means, and the uncompressed signal recorded on the recording medium is compressed by the compression means for information and again A recording unit that records the compressed signal on a recording medium as a compressed signal. 2. The recording apparatus according to claim 1, wherein the uncompressed signal once recorded on the recording medium is deleted after the compressed signal is recorded on the recording medium by the compression unit. 3. The recording apparatus according to claim 1, wherein the uncompressed signal input from the input means is divided into blocks of a prescribed capacity. 4. The recording apparatus according to claim 1, wherein the compression means performs information compression by treating the uncompressed signal as a block having a specified size. 5. The method according to claim 1, wherein when the uncompressed signal recorded on the recording medium is compressed by the compression means and recorded again on the recording medium,
A recording device, wherein a corresponding uncompressed signal is deleted. 6. The recording medium according to claim 1, wherein the control unit adds an attribute for controlling reading of the recorded uncompressed signal when the uncompressed signal input from the input unit is recorded on the recording medium. A recording device characterized in that recording is performed. 7. The recording apparatus according to claim 1, wherein said recording means is a hard disk drive. 8. The recording apparatus according to claim 1, wherein the uncompressed signal input to the input means is an audio signal and / or a video signal. 9. The transmission speed of an uncompressed signal input from the input means according to claim 1,
A recording apparatus, wherein the processing speed is higher than the processing speed of the compression means. 10. An input means for inputting an uncompressed signal, a recording means for recording the uncompressed signal on a recordable recording medium, and information on the uncompressed signal recorded on the recording medium. Compression / expansion means comprising a compression unit for generating a compressed signal by compressing, a decompression unit for expanding a compressed signal obtained by compressing information recorded on the recording medium to generate a reproduction signal, and an output for outputting the reproduction signal Means for recording an uncompressed signal input from the input means on a recording medium by the recording means in accordance with a recording instruction from a user, and transmitting the uncompressed signal once recorded on the recording medium to the compression / decompression means. The information is compressed by the compression unit and recorded as a compressed signal on the recording medium again, and the compression of the compressed signal stored in the recording medium is performed according to the user's instruction for reproduction. It was extended by extension of means, recording and reproducing apparatus and a control means for outputting a reproduced signal is decompressed by the decompression unit from said output means. 11. The input uncompressed signal already stored in the recording medium while the uncompressed signal is input from the input means and recorded on the recording medium. Is a recording / reproducing apparatus for decompressing and outputting another compressed signal. 12. The input / output device according to claim 10, wherein said compression / expansion means further comprises a bypass for outputting to the output means without performing any compression processing or expansion processing on the given uncompressed signal. A recording / reproducing apparatus which reproduces an uncompressed signal input from a means and recorded on the recording medium, by reproducing via the bypass, while recording. 13. The recording / reproducing apparatus according to claim 10, wherein the uncompressed signal once recorded on the recording medium is erased after the compressed signal is recorded on the recording medium by the compression means. 14. The recording / reproducing apparatus according to claim 10, wherein the uncompressed signal input from the input unit is divided into blocks each having a predetermined capacity. 15. The recording / reproducing apparatus according to claim 10, wherein the compression means performs information compression by treating the uncompressed signal as a block having a prescribed size. 16. The method according to claim 10, wherein when the uncompressed signal recorded on the recording medium is compressed by the compression means and recorded on the recording medium again,
A recording / reproducing apparatus, wherein a corresponding uncompressed signal is deleted. 17. The recording medium according to claim 10, wherein the control means adds an attribute for controlling reading of the recorded uncompressed signal when recording the uncompressed signal input from the input means on the recording medium. A recording / reproducing apparatus characterized in that recording is performed by recording. 18. The method according to claim 17, wherein, while the compression unit is performing compression of the uncompressed signal recorded on the recording medium, the attribute is not used for compression. A recording / reproducing apparatus, wherein reading of the uncompressed signal is prohibited, and reading of the uncompressed signal from the recording medium is prohibited for a purpose other than being used for compression. 19. The recording / reproducing apparatus according to claim 10, wherein said recording means is a hard disk device. 20. The recording / reproducing apparatus according to claim 10, wherein the uncompressed signal input to the input means is an audio signal and / or a video signal. 21. The transmission speed of an uncompressed signal input from the input means according to claim 10,
A recording / reproducing apparatus, wherein the processing speed is higher than the processing speed of the compression means.