JPH11161960A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device capable of reducing complex processings in the case where the information quantity of recording data exceeds the storage capacity of one sheet of an optical disk. SOLUTION: This optical disk device is provided with a compressing means 19 generating data for compressed recording by compressing the recording data, recording means 2, 7 which reflect the data for compressed recording to a light beam for recording data and records the data for compressed recording with respect to an optical disk 1 by irradiating the disk 1 with the light beam for recording the data to which the data for compressed recording are reflected, reproducing means 2, 7 which irradiates the disk 1 with the light beam for reproducing data and reproduces the data of the disk 1 by receiving the reflected light to which the data of the disk are reflected recorded on the disk 1 and an expanding means 20 which expands the data of the optical disk and outputs the expanded data of the disk as reproduced data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data.

[0002]

2. Description of the Related Art Recently, DVDs have been used as large-capacity information storage media.
(Digital Video Disk)-RAM (random access memo)
Optical disks such as ry) are receiving attention. On such an optical disk, concentric or spiral tracks for recording data are formed. In this track, an area called a sector is formatted. Furthermore, the concept of a block is formed by a plurality of groups of the sectors.

Recording of recording data on an optical disk,
The reproduction of the optical disk data recorded on the optical disk is performed in units of blocks. Also, like this,
Recording of recording data on the optical disk and reproduction of the optical disk data recorded on the optical disk are performed by the optical disk device.

[0004]

For example, when the information amount of the recording data exceeds the storage capacity of one optical disk, the conventional optical disk device has to take the following recording method. The recording method is to divide and record recording data on a plurality of optical disks. In such divided recording, there is a problem that the optical disk needs to be replaced during the recording process, and the processing becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce complicated processing when the information amount of recording data exceeds the storage capacity of one optical disk. An object of the present invention is to provide a possible optical disk device.

[0006]

In order to solve the above-mentioned problems and achieve the object, an optical disk apparatus according to the present invention is configured as follows.

According to the present invention, an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk and outputting the reproduced data is provided. Compression means for generating data for use in recording, and reflecting the data for compression recording on a light beam for data recording, irradiating the optical disc with a light beam for data recording on which the data for compression recording is reflected, Recording means for recording the compressed recording data to the optical disc, irradiating the optical disc with a light beam for data reproduction, and receiving reflected light reflecting the optical disc data recorded on the optical disc; Playback means for playing back the data, and expanding the optical disc data, and playing back the expanded optical disc data. And a decompression means for outputting as over data.

The present invention relates to an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. Compression means for generating data for use; first instruction means for instructing recording of compressed data or recording of uncompressed data; and recording of data compressed by the first instruction means. The first selecting means selects the data for compression recording when the recording of the uncompressed data is instructed by the first instruction means. The selected data selected by the first selecting means is reflected on the data recording light beam, and the data recording light beam on which the selected data is reflected is reflected on the optical beam. Recording means for irradiating the disc with the selected data, and irradiating the optical disc with a light beam for data reproduction, and reflecting light reflecting the optical disc data recorded on the optical disc. And a reproducing unit for reproducing the optical disk data, a decompressing unit for expanding the optical disk data to generate decompressed data, and a second command for reproducing compressed data or reproducing uncompressed data. When the reproduction of the data compressed by the second command means is instructed, the decompressed data is selected as the reproduction data, and the reproduction of the data not compressed by the second command means is performed. And a second selecting means for selecting the optical disk data as the reproduction data when the instruction is given.

The present invention relates to an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. Compression means for compressing to generate compressed recording data including compressed data indicating the predetermined compression method; first instruction means for instructing recording of compressed data or recording of uncompressed data; When the recording of the compressed data is instructed by the first command means, the data for compression recording is selected, and when the recording of the uncompressed data is commanded by the first command means, A first selecting means for selecting the recording data, and reflecting the selected data selected by the first selecting means on a data recording light beam. Irradiating the optical disk with a data recording light beam in which the selected data is reflected, irradiating the optical disk with a recording means for recording the selected data, and irradiating the optical disk with a data reproducing light beam; Reproducing means for receiving reflected light reflecting optical disk data recorded on the optical disk and reproducing the optical disk data; expanding means for expanding the optical disk data to generate expanded data; Detecting means for detecting data, and when the compressed data is detected from the optical disk data by the detecting means, instructs reproduction of the compressed data; and the detecting means does not detect the compressed data from the optical disk data. Second instruction means for instructing the reproduction of uncompressed data in this case; When the reproduction of the compressed data is instructed by the second instruction means, the decompressed data is selected as the reproduction data. When the reproduction of the uncompressed data is instructed by the second instruction means, Second selecting means for selecting the optical disk data as the reproduction data.

[0010] The present invention relates to an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. A first compression unit that generates first compression recording data including first compression data indicating the first compression scheme, and the recording data is different from the first compression scheme. A second compression unit that compresses data by a second compression method to generate second compression recording data including second compressed data indicating the second compression method; and the first or second compression method. First instruction means for instructing the first compression method, and the first instruction means when the first compression method is instructed by the first instruction means.
A first selection means for selecting the second compression recording data when the second compression method is instructed by the first instruction means; and a first selection means for selecting the second compression recording data. The selected data selected by the selection means is reflected on the data recording light beam, and the data recording light beam on which the selected data is reflected is irradiated on the optical disc,
Recording means for recording the selected data on the optical disc; irradiating the optical disc with a light beam for data reproduction; receiving reflected light reflecting the optical disc data recorded on the optical disc; Reproducing means for reproducing the optical disk data by a first decompression method corresponding to the first compression method,
First decompression means for generating first decompressed data, and second decompression for generating the second decompressed data by decompressing the optical disk data by a second decompression method corresponding to the second compression method. Means, second command means for commanding the first or second decompression method, and when the first decompression method is commanded by the second command means, the first decompression data is stored in the first decompression data. And selecting the second decompressed data as the reproduction data when the second decompression method is commanded by the second command means.
Selection means.

According to the present invention, there is provided an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. A first compression unit that generates first compression recording data including first compression data indicating the first compression scheme, and the recording data is different from the first compression scheme. A second compression unit that compresses data by a second compression method to generate second compression recording data including second compressed data indicating the second compression method; and the first or second compression method. First instruction means for instructing the first compression method, and the first instruction means when the first compression method is instructed by the first instruction means.
A first selection means for selecting the second compression recording data when the second compression method is instructed by the first instruction means; and a first selection means for selecting the second compression recording data. The selected data selected by the selection means is reflected on the data recording light beam, and the data recording light beam on which the selected data is reflected is irradiated on the optical disc,
Recording means for recording the selected data on the optical disc; irradiating the optical disc with a light beam for data reproduction; receiving reflected light reflecting the optical disc data recorded on the optical disc; Reproducing means for reproducing the optical disk data by a first decompression method corresponding to the first compression method,
First decompression means for generating first decompressed data, and second decompression for generating the second decompressed data by decompressing the optical disk data by a second decompression method corresponding to the second compression method. Means, and the first
Or detecting means for detecting the second compressed data, and instructing the first decompression method when the first compressed data is detected from the optical disk data by the detecting means, and detecting the optical disk by the detecting means. A second instruction unit for instructing the second decompression method when the second compressed data is detected from the data; and a second instruction unit for instructing the first decompression method by the second instruction unit. Selects the first decompressed data as the reproduction data, and selects the second decompression data as the reproduction data when the second decompression method is instructed by the second command means. Selection means.

According to the present invention, there is provided an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. The optical disk is irradiated with a light beam for data recording in which the data for recording is reflected,
Recording means for recording the recording data on the optical disc; irradiating the optical disc with a light beam for data reproduction; receiving reflected light reflecting the optical disc data recorded on the optical disc; Reproducing means for reproducing data; decompressing means for decompressing the optical disc data to generate decompressed data; command means for instructing reproduction of compressed data or reproduction of uncompressed data; When the reproduction of the compressed data is commanded, the decompressed data is selected as the reproduction data. When the reproduction of the uncompressed data is commanded by the command means, the optical disk data is used as the reproduction data. Selecting means for selecting.

According to the present invention, there is provided an optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. The optical disk is irradiated with a light beam for data recording in which the data for recording is reflected,
Recording means for recording the recording data on the optical disc; irradiating the optical disc with a light beam for data reproduction; receiving reflected light reflecting the optical disc data recorded on the optical disc; Reproducing means for reproducing data; decompressing means for decompressing the optical disc data to generate decompressed data; detecting means for detecting the compressed data from the optical disc data; and detecting the compressed data from the optical disc data by the detecting means. Command means for commanding reproduction of compressed data when detected, and commanding reproduction of uncompressed data when the detection means does not detect the compressed data from the optical disk data; When the command to reproduce the data compressed by the It was selected as data, and a selecting means for selecting the optical disc data as the reproduction data when the reproduction of data which is not compressed is commanded by the command means.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

First, an outline of a DVD-RAM as an optical disk will be described with reference to FIGS. FIG. 1 is a diagram for explaining the concept of a zone in a data recording area of an optical disc. FIG. 2 is a diagram for explaining an outline of a data structure of a data recording area of the optical disc. FIG.
FIG. 3 is a diagram for explaining a rotation speed corresponding to each zone of the optical disc and the number of sectors per track in each zone. FIG. 4 is a diagram for explaining the sector format of the optical disc.

As shown in FIG. 1 and FIG.
Can be divided into a lead-in area 2, a data area 3, and a lead-out area 4. Each area is composed of a plurality of zones, and each zone is composed of a plurality of tracks.

The lead-in area 2 includes an emboss data zone 5 and a rewritable data zone 6. A reference signal and control data are recorded in the emboss data zone 5 during manufacturing. The rewritable data zone 6 further includes a guard track zone, a disk test zone, a drive test zone, a disk identification data zone, a replacement management zone, and the like. Defect list information is recorded in this replacement management zone.

The data area 3 is composed of a plurality of zones, for example, zones 3a,.

The lead-out area 4 is a rewritable data zone similar to the rewritable data zone 6 formed in the lead-in area 2. In the lead-out area 4, data having the same recording content as the data zone 6 is recorded.

The optical disc 1 has a different number of sectors per track between the inner circumference and the outer circumference. That is, the number of sectors included in one track on the outer peripheral side is larger than the number of sectors included in one track on the inner peripheral side.
Therefore, as shown in FIG. 3, the number of rotations (rotational speed) of the optical disc 1 changes for each zone. Therefore, in each zone in the lead-in area 2, each zone in the data area 3, and each zone in the lead-out area 4, the rotation speed decreases from the inner circumference to the outer circumference of the optical disc 1.
The relationship between the rotation speed data and the number of sectors included in one track for each zone (FIG. 3) is recorded in the memory of the optical disk device.

Zones 3a,... 3x of the data area 3
As shown in FIG. 1 and FIG. 2, each track has an ECC (error correction code) block data unit (for example, 38688 bytes) as a data recording unit.
The data is recorded.

Next, the sector format will be described with reference to FIG.

As shown in FIG. 4, one sector is approximately 2 sectors.
It consists of 697 bytes. This sector contains 8-
Data modulated by 16 modulation is recorded. 8-1
Six modulation is a modulation method for modulating an 8-bit input code sequence into a 16-bit output code sequence. The input code sequence is called an input bit, and the output code sequence is called a channel bit. Incidentally, one byte has the same meaning as 16 channel bits.

Here, the details of one sector will be described. One sector has a 128-byte header field,
It consists of a byte mirror field and a 2567 byte recording field.

In the header field, predetermined data is recorded (pre-formatted) as a concave / convex shape in the optical disk manufacturing process. In this header field, a sector address of 4 is set in order to improve the detection accuracy of the header.
Overwritten. That is, this header field is composed of a header 1 field, a header 2 field, a header 3 field, and a header 4 field.
The header 1 field and the header 3 field are composed of 46 bytes. Header 2 field and header 4
The field is composed of 18 bytes.

A header 1 field has a 36-byte synchronization code VFO (Variable Frequency Oscillator) 1 field and a 3-byte address mark AM (Address Matrix).
rk) field, 4-byte address PID (Physical
ID) 1 field, 2 byte error detection code IED
(ID Error Detection Code) 1 field, 1 byte postamble PA (Post Ambles) 1 field.

The header 2 field includes an 8-byte synchronization code VFO2 field and a 3-byte address mark A.
M field, 4-byte address PID2 field, 2-byte error detection code IED2 field, 1 byte
It consists of a byte postamble PA2 field.

The header 3 field includes an 8-byte synchronization code VFO2 field and a 3-byte address mark A.
M field, 4-byte address PID3 field, 2-byte error detection code IED3 field, 1 byte
It is composed of a byte postamble PA1 field.

The header 4 field includes an 8-byte synchronization code VFO2 field and a 3-byte address mark A.
M field, 4-byte address PID4 field, 2-byte error detection code IED4 field, 1
It consists of a byte postamble PA2 field.

In the PID field, physical address information is recorded. Specifically, sector information (including a PID number) of 1 byte and a sector number of 3 bytes are recorded.

In the VFO field, a PLL (Phase Lo
A continuous repetition pattern (100010001000...) for drawing in the cked Loop) is recorded.
Specifically, the pattern recorded in the VFO field is used to synchronize the frequency for reproducing the address information recorded in the PID field.

An address mark is recorded in the AM field, and this address mark plays a role in detecting a block boundary when demodulating a fixed-length block code. Specifically, the address mark recorded in the AM field indicates the position of the address information recorded in the PID field. A special pattern (a pattern violating the run-length restriction) that does not appear elsewhere is used for the address mark recorded in the AM field.

The error detection code IED field contains an error (error) for the sector address (including the ID number).
The detection code is recorded, and the presence or absence of an error in the PID read by the error detection code is detected.

State information required for demodulation is recorded in the postamble PA field, and also has a role of polarity adjustment so that the header field ends with a space.

The mirror field is a mirror surface field, and this field is used for, for example, gain adjustment of a photodetector described later.

The recording field is a field mainly for recording user data. The recording fields are a (10 + J / 16) byte gap field, a (20 + K) byte guard 1 field, a 35 byte VFO3 field, and a 3 byte PS.
(Pre-synchronous code) field, 2418-byte data field (user data field), 1-byte postamble PA3 field, (55-K)
Guard 2 field of bytes, and (25-J / 1
6) Consists of a byte buffer field. Incidentally, J takes an integer of 0 to 15 and K takes an integer of 0 to 7 and takes a random value. As a result, the start position of the data writing is randomly shifted. As a result, deterioration of the recording film due to overwriting can be reduced.

The gap field is a field where nothing is recorded.

The guard 1 field is a discard data area for absorbing the deterioration of the starting end of the repeated overwriting peculiar to the phase change recording film.

The VFO3 field is also a field for PLL lock, but is also intended to synchronize byte boundaries by inserting a synchronization code in the same pattern.

The PS field is a field in which a synchronization code is recorded, and is provided for detecting a block boundary.

The data field includes a data ID, a data ID error correction code IED (Data ID Error Detection Code).
Code), synchronization code, ECC (Error Collection Code)
), EDC (Error Detection Code), 2048 bytes of user data, and the like.
The data ID is a sector ID 1 to ID 16 of 4 bytes (32 channel bits) of each sector. Data ID
The error correction code IED is a 2-byte (16-bit) error correction code for data ID.

The postamble PA3 field contains state information necessary for demodulation and is a field indicating the end of the last byte of the previous data field.

The guard 2 field is a field provided to prevent the end deterioration at the time of repetitive recording peculiar to the phase change recording medium from reaching the data field.

The buffer field is a field provided to absorb rotation fluctuations of the motor for rotating the optical disk 1 so that the data field does not overlap the next header field.

Next, an optical disk device will be described with reference to FIGS. FIG. 5 is a diagram illustrating a schematic configuration of the optical disc device 100 according to the first embodiment. FIG.
FIG. 4 is a diagram illustrating a schematic configuration of an optical disc device 200 according to a second embodiment. FIG. 7 is a diagram illustrating a schematic configuration of an optical disc device 300 according to the third embodiment. FIG.
FIG. 14 is a diagram illustrating a schematic configuration of an optical disc device 400 according to a fourth embodiment.

The optical disk devices 100, 200, 300,
And 400, the recording data is reflected on the recording light beam, the recording light beam on which the recording data is reflected is irradiated on the optical disc, and the recording data is recorded on the optical disc. It is. Further, the optical disk devices 100, 200, 300, and 400 irradiate the optical disk with a light beam for reproduction, receive reflected light reflecting the optical disk data recorded on the optical disk, and record the optical disk with the light. It also plays back optical disk data that has been written.

First, an optical disk device 100 according to the first embodiment will be described with reference to FIG.

The optical disk device 100 includes an optical pickup 2, an RF amplifier 3, a recording / reproducing switching circuit 4, a reproducing signal processing circuit 5, a recording signal processing circuit 6, a laser control unit 7, an RA
M8, interface (I / F) 9, system controller 10, optical pickup control circuit 12, feed motor control circuit 13, feed motor 14, spindle motor control circuit 1
5, a spindle motor 16, a loading motor control circuit 17, a loading motor 18, a data compression processing circuit 19, a data expansion processing circuit 20, and the like.

First, the optical disk device 100 shown in FIG.
Will be described.

The data recording process by the optical disc device 100 is executed according to a compression recording command output from the host computer 11. The compression recording command output from the host computer 11 is input to the system control unit 10 via the interface 9. At this time, the recording data output from the host computer 11 is
The data is input to the RAM 8 via the interface 9. This RAM 8 functions as a buffer for absorbing the data transfer speed.

System control unit 10 receiving the compression recording command
Causes the optical disc device 100 to execute a compression recording process based on the control data recorded in the memory 10a. That is, the system control unit 10 outputs a recording command to the recording / reproduction switching circuit 4, the optical pickup control circuit 12, the feed motor control circuit 13, the spindle motor control circuit 15, and the loading motor control circuit 17.

Upon receiving the recording command, the recording / reproducing switching circuit 4
The data (modulation compression recording data described later) provided from the recording signal processing circuit 6 is supplied to the laser control unit 7.
Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 operates the laser oscillator 2 a provided in the optical pickup 2.
A light beam for recording is emitted.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

On the other hand, the recording data input to the RAM 8 is supplied from the RAM 8 to the data compression processing circuit 19. The data compression processing circuit 19 compresses the recording data according to a predetermined compression method, and generates compressed recording data.

The data for compressed recording generated by the data compression processing circuit 19 is supplied from the data compression processing circuit 19 to the recording signal processing circuit 6. The recording signal processing circuit 6 modulates the data for compression recording into a DVD-RAM signal recording format and generates modulated compression recording data.

The modulation / compression recording data generated by the recording signal processing circuit 6 is supplied from the recording signal processing circuit 6 to the laser control unit 7 by the recording / reproduction switching circuit 4. The laser control unit 7 controls the laser oscillator 2a based on the modulation / compression recording data. In other words, the modulation compression recording data is reflected on the recording light beam emitted from the laser oscillator 2a. A light beam for recording on which the data for modulation / compression recording is reflected is radiated by the optical pickup 2 to a predetermined position on the optical disk. Thus, the recording of the recording data on the optical disk is completed.

Next, a data reproduction process by the optical disk device 100 will be described.

The data reproduction process by the optical disk device 100 is executed according to a reproduction command output from the host computer 11. A reproduction command output from the host computer 11 is input to the system control unit 10 via the interface 9.

The system control unit 10 having received the reproduction command
It causes the optical disc device 100 to execute a data reproduction process.
That is, the system control unit 10 controls the recording / reproduction switching circuit 4,
Optical pickup control circuit 12, feed motor control circuit 1
3. A reproduction command is output to the spindle motor control circuit 15 and the loading motor control circuit 17.

The optical pickup control circuit 12, which has received the reproduction command, causes the optical pickup 2 to reproduce data. The feed motor control circuit 13 that has received the reproduction command controls the feed motor 14 according to the state of the data reproduction process. Feed spindle motor control circuit 1 that has received a playback command
Reference numeral 3 controls the spindle motor 16 according to the status of the data reproduction process. The feed loading motor control circuit 17 that has received the reproduction command controls the loading motor 18 according to the state of the data reproduction process.

The recording / reproducing switching circuit 4 which has received the reproducing command,
The data (optical disk data described later) provided from the RF amplifier 3 is supplied to the reproduction signal processing circuit 5. further,
The recording / reproduction switching circuit 4 outputs a reproduction command to the laser control unit 7. Upon receiving the reproduction instruction, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a light beam for reproduction.

The light beam for reproduction emitted from the laser oscillator 2a is applied to a predetermined position on the optical disk by the optical pickup 2. At this time, the reflected light from the optical disk is received by the optical pickup 2. The reflected light reflects optical disk data recorded on the optical disk. It is assumed that the optical disk data is data corresponding to modulation compression recording data. The optical pickup 2 detects optical disk data from the reflected light, and supplies the detected optical disk data to the RF amplifier 3. The RF amplifier 3 amplifies optical disk data.

The optical disk data amplified by the RF amplifier 3 is supplied from the RF amplifier 3 to the reproduction signal processing circuit 5 by the recording / reproduction switching circuit 4. Reproduction signal processing circuit 5
Demodulates optical disk data according to a DVD-RAM signal recording format.

The optical disk data demodulated by the reproduction signal processing circuit 5 is supplied from the reproduction signal processing circuit 5 to the data expansion processing circuit 20. The data expansion processing circuit 20 expands the optical disk data according to a predetermined expansion method to generate reproduction data.

The reproduced data generated by the data expansion processing circuit 20 is stored in the RAM 8. The reproduction data stored in the RAM 8 is supplied to the host computer 11 via the interface 9. Thus, the reproduction of the optical disk data recorded on the optical disk is completed.

Next, an example of the compression processing executed by the data compression processing circuit 19 will be described.

It is assumed that data before compression, that is, recording data, is as follows.

Recording Data: (00FFFFFFFFFFFFFFFFFFFF0000021001) First, the number of continuous identical data and single data included in the recording data are counted. However, the count value is "0"
Start with. That is, when single data is counted, the count value becomes “0”. When two identical data are consecutive, the count value is “1”. The maximum count value is "F (hexadecimal notation)". That is, when the same data is continuous for 20 times, the count value is divided into “F” and “3”.

When the number of consecutive identical data and the single data included in the recording data are counted in accordance with such rules, the counting result is as follows.

[0070] As can be seen from the counting result, the number of data blocks to be counted is eight in total. The data "8" of the number of the data blocks to be counted,
By connecting all the data “0FF02101” to be counted and the data “1F340010” of the count value corresponding to the data to be counted, compression recording data as shown below is generated.

Data for compression recording: (080FF021011F340010) Data “0” in the second digit from the beginning of the data for compression recording
“8” indicates the number of data blocks to be counted. Data “0FF02101” from the third digit to the tenth digit of the compressed recording data indicates data to be counted. Data “1F340010” from the 11th digit to the 18th digit of the compressed recording data indicates a count value corresponding to the data to be counted.

Next, an example of a decompression process executed by the data decompression circuit 20 will be described.

The data for compression recording is assumed as follows. The data for compression recording is data corresponding to optical disk data reproduced from the optical disk.

Compressed recording data: (080FF021011F340010) First, the data “0” of the first two digits of the compressed recording data
8 ”, the boundary between the data to be counted and the data of the count value corresponding to the data to be counted is detected. Then, from this boundary, the data to be counted and the count value corresponding to the data to be counted are separated. Then, when the data to be counted is associated with the count value corresponding to the data to be counted, the following counting result is obtained.

[0075] Two consecutive data 0, 1 obtained from the count result
6 consecutive data F, 4 consecutive data F, 5 consecutive data 0, 1 data 2, 1 data 1, 2
Recording data is generated by connecting all the continuous data 0 and one data 0. That is, the following recording data is generated from the count result. The recording data is data obtained by expanding the compressed optical disk data.

Recording data: (00FFFFFFFFFFFFFFFFFFFF0000021001) As described above, the optical disk device 100 of the present invention
Compresses recording data and records it on an optical disk. Also, the optical disk device 100 of the present invention expands optical disk data reproduced from an optical disk to generate reproduced data. Thereby, the apparent storage capacity of the optical disk can be increased. Therefore, according to the optical disk device 100 of the present invention, it is possible to reduce the situation where the recording data must be divided and recorded on two optical disks. Strictly speaking, according to the optical disc apparatus 100 of the present invention, even if it is conventionally necessary to divide and record the recording data on N optical discs, the recording data is divided and recorded on N or less optical discs. can do. That is, according to the optical disc apparatus 100 of the present invention, complicated processing when the information amount of the recording data exceeds the storage capacity of one optical disc can be reduced.

Next, an optical disc device 200 according to a second embodiment will be described with reference to FIG.

The optical disc device 200 includes an optical pickup 2, an RF amplifier 3, a recording / reproduction switching circuit 4, a reproduction signal processing circuit 5, a recording signal processing circuit 6, a laser control unit 7, an RA
M8, interface (I / F) 9, system controller 10, optical pickup control circuit 12, feed motor control circuit 13, feed motor 14, spindle motor control circuit 1
5, a spindle motor 16, a loading motor control circuit 17, a loading motor 18, a data compression processing circuit 19, a data decompression processing circuit 20, a compression / decompression switching circuit 21, and the like. The optical disk device 10
The same blocks as 0 are assigned the same numbers.

The optical disk device 200 can selectively execute compression recording for compressing and recording the recording data on the optical disk or normal recording for recording the recording data as it is. In addition, the optical disk device 200
Can selectively execute extended playback in which the optical disk data played back from the optical disk is expanded and the playback data is output, or normal playback in which the optical disk data is output as the playback data as it is.

First, the data recording processing by the optical disk device 200 will be described.

The data recording process by the optical disc device 200 is executed according to a compression recording command or a normal recording command output from the host computer 11. A compression recording command or a normal recording command output from the host computer 11 is transmitted to the system controller 10 via the interface 9.
Is input to At this time, the host computer 1
The recording data output from the interface 1
Is input to the RAM 8 via the. This RAM 8 functions as a buffer for absorbing the data transfer speed.

Hereinafter, the case where the compressed recording command is output from the host computer 11 and the case where the normal recording command is output will be described separately.

First, a case where a compression recording command is output from the host computer 11 will be described. That is, the system control unit 10 that has received the compression recording command
Based on the control data recorded in a, the optical disk device 200 executes the compression recording process. That is, the system control unit 10 outputs a compression recording command to the compression / expansion switching circuit 21. Further, the system control unit 10
Recording / reproduction switching circuit 4, optical pickup control circuit 12, feed motor control circuit 13, spindle motor control circuit 1
5, and a recording command is output to the loading motor control circuit 17.

Compression / expansion switching circuit 2 receiving the compression / recording instruction
1 supplies data (compression recording data) provided from the data compression processing circuit 19 to the recording signal processing circuit 6. Further, the recording / reproducing switching circuit 4 receiving the recording command supplies the data (modulation compression recording data) provided from the recording signal processing circuit 6 to the laser control unit 7. Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a recording light beam.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

On the other hand, the recording data input to the RAM 8 is supplied from the RAM 8 to the data compression processing circuit 19. The data compression processing circuit 19 compresses the recording data according to a predetermined compression method, and generates compressed recording data.
In addition, compressed data indicating compressed data is added to the first area included in the compressed recording data.

The compression recording data generated by the data compression processing circuit 19 is supplied from the data compression processing circuit 19 to the recording signal processing circuit 6 by the compression / decompression switching circuit 21. The recording signal processing circuit 6 converts the data for compression recording into a DVD.
-Modulate to a RAM signal recording format to generate modulation compression recording data.

The modulation / compression recording data generated by the recording signal processing circuit 6 is supplied from the recording signal processing circuit 6 to the laser control unit 7 by the recording / reproduction switching circuit 4. The laser control unit 7 controls the laser oscillator 2a based on the modulation / compression recording data. In other words, the modulation compression recording data is reflected on the recording light beam emitted from the laser oscillator 2a. A light beam for recording on which the data for modulation / compression recording is reflected is radiated by the optical pickup 2 to a predetermined position on the optical disk. Thus, the recording of the recording data on the optical disk is completed.

Next, a case where a normal recording command is output from the host computer 11 will be described. That is, the system control unit 10 that has received the normal recording command stores the memory 10
Based on the control data recorded in a, the optical disk device 200 executes the normal recording process. That is, the system control unit 10 outputs a normal recording command to the compression / decompression switching circuit 21. Further, the system control unit 10
Recording / reproduction switching circuit 4, optical pickup control circuit 12, feed motor control circuit 13, spindle motor control circuit 1
5, and a recording command is output to the loading motor control circuit 17.

The compression / decompression switching circuit 2 which has received the normal recording instruction
1 is data (recording data) provided from the RAM 8
Is supplied to the recording signal processing circuit 6. Further, the recording / reproducing switching circuit 4 receiving the recording command supplies the data (modulation recording data) provided from the recording signal processing circuit 6 to the laser control unit 7. Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a recording light beam.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

On the other hand, the recording data input to the RAM 8 is supplied from the RAM 8 to the recording signal processing circuit 6 by the compression / decompression switching circuit 21. The recording signal processing circuit 6 modulates the recording data into a DVD-RAM signal recording format and generates modulated recording data.

The modulation / recording data generated by the recording signal processing circuit 6 is supplied from the recording signal processing circuit 6 to the laser control unit 7 by the recording / reproduction switching circuit 4. The laser control unit 7 controls the laser oscillator 2a based on the modulation recording data. That is, the recording light beam emitted from the laser oscillator 2a reflects the modulation recording data.
A recording light beam on which the modulation recording data is reflected is irradiated to a predetermined position on the optical disk by the optical pickup 2. Thus, the recording of the recording data on the optical disk is completed.

Next, the data reproducing process by the optical disk device 200 will be described.

The data reproducing process by the optical disk device 200 is executed according to a reproducing command output from the host computer 11. A reproduction command output from the host computer 11 is input to the system control unit 10 via the interface 9.

The system control unit 10 having received the reproduction command
The data reproducing process is executed by the optical disc device 200.
That is, the system control unit 10 controls the recording / reproduction switching circuit 4,
Optical pickup control circuit 12, feed motor control circuit 1
3. A reproduction command is output to the spindle motor control circuit 15 and the loading motor control circuit 17.

The optical pickup control circuit 12 which has received the reproduction command causes the optical pickup 2 to execute data reproduction. The feed motor control circuit 13 that has received the reproduction command controls the feed motor 14 according to the state of the data reproduction process. Feed spindle motor control circuit 1 that has received a playback command
Reference numeral 3 controls the spindle motor 16 according to the status of the data reproduction process. The feed loading motor control circuit 17 that has received the reproduction command controls the loading motor 18 according to the state of the data reproduction process.

Upon receiving the reproduction command, the recording / reproduction switching circuit 4
Data (optical disk data) provided from the RF amplifier 3 is supplied to the reproduction signal processing circuit 5. Further, the recording / reproduction switching circuit 4 outputs a reproduction command to the laser control unit 7. Upon receiving the reproduction instruction, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a light beam for reproduction.

The optical beam for reproduction emitted from the laser oscillator 2a is applied to a predetermined position on the optical disk by the optical pickup 2. At this time, the reflected light from the optical disk is received by the optical pickup 2. The reflected light reflects optical disk data recorded on the optical disk. The optical pickup 2 detects optical disk data from the reflected light, and supplies the detected optical disk data to the RF amplifier 3. The RF amplifier 3 amplifies optical disk data.

The optical disk data amplified by the RF amplifier 3 is supplied from the RF amplifier 3 to the reproduction signal processing circuit 5 by the recording / reproduction switching circuit 4. Reproduction signal processing circuit 5
Demodulates optical disk data according to a DVD-RAM signal recording format.

The demodulated optical disk data is supplied from the reproduction signal processing circuit 5 to the compression / decompression switching circuit 21 and the data decompression processing circuit 20. The compression / expansion switching circuit 21 includes:
A detection circuit 21a is provided. This detection circuit 21a
Detects compressed data from the demodulated optical disk. The data expansion processing circuit 20 expands the demodulated optical disk data according to a predetermined expansion method. The optical disk data expanded by the data expansion processing circuit 20 is supplied from the data expansion processing circuit 20 to the compression / expansion switching circuit 21.

Then, one of the two optical disk data supplied to the compression / decompression switching circuit 21 is selected according to the result of the detection of the compressed data by the detection circuit 21a. In other words, the optical disk data just demodulated,
One of the demodulated and expanded optical disk data is selected.

More specifically, when compressed data is detected by the detection circuit 21a, demodulated and expanded optical disk data is selected. Then, the demodulated and expanded optical disk data is supplied as reproduction data from the compression / expansion switching circuit 21 to the RAM 8, and the RAM 8
Is stored. Conversely, when no compressed data is detected by the detection circuit 21a, only the demodulated optical disk data is selected. Then, the optical disk data just demodulated is supplied as reproduction data from the compression / decompression switching circuit 21 to the RAM 8 and stored in the RAM 8.

The reproduction data stored in the RAM 8 is supplied to the host computer 11 via the interface 9. Thus, the reproduction of the optical disk data recorded on the optical disk is completed.

As described above, the optical disk apparatus 200 of the present invention selectively executes compressed recording for compressing and recording recording data on an optical disk or normal recording for recording recording data as it is. Can be. Further, the optical disc apparatus 200 of the present invention can selectively execute decompression reproduction for expanding the optical disc data reproduced from the optical disc and outputting the reproduction data, or normal reproduction for directly outputting the optical disc data as the reproduction data. .

That is, by executing compression recording and decompression reproduction in the optical disk device 200, the apparent storage capacity of the optical disk can be increased. Therefore, according to the optical disk device 200 of the present invention, it is possible to reduce a situation in which recording data must be divided and recorded on two optical disks. Strictly speaking, according to the optical disc apparatus 200 of the present invention, even if it is conventionally necessary to divide and record recording data on N optical discs, the recording data is divided and recorded on N or less optical discs. can do. That is, according to the optical disk device 200 of the present invention, complicated processing when the information amount of the recording data exceeds the storage capacity of one optical disk can be reduced.

Further, by performing normal recording and normal reproduction in the optical disk device 200, it is possible to perform conventional recording and reproduction.

Next, an optical disc device 300 according to a third embodiment will be described with reference to FIG.

The optical disk device 300 includes an optical pickup 2, an RF amplifier 3, a recording / reproduction switching circuit 4, a reproduction signal processing circuit 5, a recording signal processing circuit 6, a laser control unit 7, an RA
M8, interface (I / F) 9, system controller 10, optical pickup control circuit 12, feed motor control circuit 13, feed motor 14, spindle motor control circuit 1
5, spindle motor 16, loading motor control circuit 17, loading motor 18, first data compression processing circuit 22, second data compression processing circuit 23, first data decompression processing circuit 24, second data decompression processing circuit 2
5 and a compression / expansion method switching circuit.
The same blocks as those of the optical disc device 100 are assigned the same numbers.

The optical disk device 300 can selectively execute the first compression recording or the second compression recording.
Further, the optical disc device 300 can selectively execute the first decompression reproduction or the second decompression reproduction.

The first compression recording means that the recording data is stored in the first
In this method, the first compression recording data compressed by the first compression method is recorded on an optical disk. The second compression recording means that the recording data is compressed by a second compression method different from the first compression method, and the second compression recording data compressed by the second compression method is recorded on the optical disc. How to The first expansion reproduction is a method of expanding optical disk data reproduced from an optical disk by a first expansion method and outputting optical disk data expanded by the first expansion method as reproduction data. The second expansion reproduction is a method of expanding optical disk data reproduced from an optical disk by a second expansion method and outputting optical disk data expanded by the second expansion method as reproduction data.

When data compressed by the first compression method is expanded by the first expansion method, the data returns to data before compression. When data compressed by the second compression method is expanded by the second expansion method, the data returns to data before compression.

First, a data recording process performed by the optical disk device 200 will be described.

The data recording process by the optical disc device 200 is executed according to the first compression recording command or the second compression recording command output from the host computer 11.
The first compression recording command or the second compression recording command output from the host computer 11 is input to the system control unit 10 via the interface 9. At this time, the recording data output from the host computer 11 is input to the RAM 8 via the interface 9. This RAM 8 functions as a buffer for absorbing the data transfer speed.

Hereinafter, the case where the first compression recording instruction is output from the host computer 11 and the case where the second compression recording instruction is output will be described separately.

First, the case where the first compression recording command is output from the host computer 11 will be described. That is, the system control unit 10 receiving the first compression recording command
Causes the optical disc device 300 to execute a first compression recording process based on the control data recorded in the memory 10a. That is, the system control unit 10 outputs the first compression / recording instruction to the compression / decompression method switching circuit 26. Further, the system control unit 10 outputs a recording command to the recording / reproduction switching circuit 4, the optical pickup control circuit 12, the feed motor control circuit 13, the spindle motor control circuit 15, and the loading motor control circuit 17.

Upon receiving the first compression / recording instruction, the compression / decompression method switching circuit 26 supplies the data (first compression / recording data) provided from the first data compression processing circuit 22 to the recording signal processing circuit 6. I do. Further, the recording / reproducing switching circuit 4 which has received the recording command supplies the data (first modulation / compression recording data) provided from the recording signal processing circuit 6 to the laser control unit 7. Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a recording light beam.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

Next, the case where the second compression recording command is output from the host computer 11 will be described. That is, the system control unit 10 receiving the second compression recording instruction
Causes the optical disk device 300 to execute the second compression recording process based on the control data recorded in the memory 10a. That is, the system control unit 10 outputs the second compression / recording instruction to the compression / decompression method switching circuit 26. Further, the system control unit 10 outputs a recording command to the recording / reproduction switching circuit 4, the optical pickup control circuit 12, the feed motor control circuit 13, the spindle motor control circuit 15, and the loading motor control circuit 17.

Upon receiving the second compression / recording instruction, the compression / decompression method switching circuit 26 supplies the data (second compression / recording data) provided from the second data compression processing circuit 23 to the recording signal processing circuit 6. I do. Further, the recording / reproducing switching circuit 4 which has received the recording command supplies the data (second modulation / compression recording data) provided from the recording signal processing circuit 6 to the laser control unit 7. Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a recording light beam.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

On the other hand, the recording data input to the RAM 8 is supplied from the RAM 8 to the first data compression processing circuit 22 and the second data compression processing circuit 23.

The first data compression processing circuit 22 compresses the recording data according to the first compression method, and generates first compressed recording data. Further, first compressed data indicating that the data is compressed by the first compression method is added to the first area included in the first compressed recording data. Then, the first data for compression recording is supplied from the first data compression processing circuit 22 to the compression / decompression method selection circuit 26.

The second data compression processing circuit 22 compresses the recording data according to the second compression method, and generates the second compressed recording data. Further, second compressed data indicating that the data has been compressed by the second compression method is added to the first area included in the second compressed recording data. Then, the second compression recording data is supplied from the second data compression processing circuit 22 to the compression / decompression method selection circuit 26.

The compression / decompression method selection circuit 26 selects one of the first and second data for compression recording in accordance with the instruction supplied from the system control section 10 and supplies it to the recording signal processing circuit 6. I do. That is, the system control unit 1
If the instruction supplied from 0 is the first compression recording instruction, the compression / decompression method selection circuit 26 selects the first compression recording data. Conversely, when the instruction supplied from the system control unit 10 is the second compression recording instruction, the compression / decompression method selection circuit 26 selects the second compression recording data.

The recording signal processing circuit 6 modulates the first or second compressed recording data into a DVD-RAM signal recording format to generate first or second modulated compression recording data. The first or second modulation / compression recording data generated by the recording signal processing circuit 6 is converted by the recording / reproduction switching circuit 4
The signal is supplied from the recording signal processing circuit 6 to the laser control unit 7.
The laser control section 7 controls the laser oscillator 2a based on the first or second modulation / compression recording data. That is, the recording light beam emitted from the laser oscillator 2a includes:
The first or second modulation / compression recording data is reflected. The optical pickup 2 irradiates a predetermined position on the optical disk with a recording light beam on which the first or second modulated compression recording data is reflected. Thus, the recording of the recording data on the optical disk is completed.

Next, a description will be given of a data reproduction process performed by the optical disk device 300.

The data reproducing process by the optical disk device 300 is executed according to a reproducing command output from the host computer 11. A reproduction command output from the host computer 11 is input to the system control unit 10 via the interface 9.

The system control unit 10 which has received the reproduction command
It causes the optical disc device 300 to execute a data reproduction process.
That is, the system control unit 10 controls the recording / reproduction switching circuit 4,
Optical pickup control circuit 12, feed motor control circuit 1
3. A reproduction command is output to the spindle motor control circuit 15 and the loading motor control circuit 17.

The optical pickup control circuit 12 that has received the reproduction command causes the optical pickup 2 to reproduce data. The feed motor control circuit 13 that has received the reproduction command controls the feed motor 14 according to the state of the data reproduction process. Feed spindle motor control circuit 1 that has received a playback command
Reference numeral 3 controls the spindle motor 16 according to the status of the data reproduction process. The feed loading motor control circuit 17 that has received the reproduction command controls the loading motor 18 according to the state of the data reproduction process.

The recording / reproducing switching circuit 4 which has received the reproducing command,
Data (optical disk data) provided from the RF amplifier 3 is supplied to the reproduction signal processing circuit 5. Further, the recording / reproduction switching circuit 4 outputs a reproduction command to the laser control unit 7. Upon receiving the reproduction instruction, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a light beam for reproduction.

The light beam for reproduction emitted from the laser oscillator 2a is applied to a predetermined position on the optical disk by the optical pickup 2. At this time, the reflected light from the optical disk is received by the optical pickup 2. The reflected light reflects optical disk data recorded on the optical disk. The optical pickup 2 detects optical disk data from the reflected light, and supplies the detected optical disk data to the RF amplifier 3. The RF amplifier 3 amplifies optical disk data.

The optical disk data amplified by the RF amplifier 3 is supplied from the RF amplifier 3 to the reproduction signal processing circuit 5 by the recording / reproduction switching circuit 4. Reproduction signal processing circuit 5
Demodulates optical disk data according to a DVD-RAM signal recording format.

The demodulated optical disk data is transmitted from the reproduction signal processing circuit 5 to the first data decompression processing circuit 24 and the second
Is supplied to the data decompression processing circuit 25. The first data decompression processing circuit 24 decompresses the demodulated optical disk data according to a first decompression method. The first optical disk data decompressed by the first data decompression processing circuit 24 is transmitted from the first data decompression processing circuit 24 to the compression / decompression method switching circuit 26.
Supplied to Also, the second data decompression processing circuit 25
Expands the demodulated optical disk data according to the second expansion method. The second optical disk data expanded by the second data expansion processing circuit 25 is supplied from the second data expansion processing circuit 25 to the compression / expansion method switching circuit 26.

The compression / expansion system switching circuit 26 is provided with a detection circuit 26a. The detection circuit 26a detects compressed data from the demodulated optical disk. Then, one of the two optical disk data supplied to the compression / decompression switching circuit 26 is selected according to the detection result of the compressed data by the detection circuit 26a. That is,
One of the first and second optical disk data is selected.

More specifically, when the first compressed data is detected by the detection circuit 26a, the first optical disk data is selected. Then, the first optical disk data is supplied as reproduction data from the compression / decompression method switching circuit 26 to the RAM 8 and stored in the RAM 8.
Conversely, when the detection circuit 26a detects the second compressed data, the second optical disk data is selected.
Then, the second optical disk data is supplied as reproduction data from the compression / decompression method switching circuit 26 to the RAM 8 and stored in the RAM 8.

The reproduction data stored in the RAM 8 is supplied to the host computer 11 via the interface 9. Thus, the reproduction of the optical disk data recorded on the optical disk is completed.

As described above, the optical disk device 300 of the present invention can selectively execute the first compression recording or the second compression recording. Also, the optical disc device 300300 can selectively execute the first decompression reproduction or the second decompression reproduction. Therefore, according to the optical disk device 300 of the present invention, it is possible to adopt various compression methods and decompression methods corresponding to these various compression methods.

Next, an optical disc device 400 according to a fourth embodiment will be described with reference to FIG.

The optical disc device 400 includes an optical pickup 2, an RF amplifier 3, a recording / reproduction switching circuit 4, a reproduction signal processing circuit 5, a recording signal processing circuit 6, a laser control unit 7, an RA
M8, interface (I / F) 9, system controller 10, optical pickup control circuit 12, feed motor control circuit 13, feed motor 14, spindle motor control circuit 1
5, spindle motor 16, loading motor control circuit 17, loading motor 18, data compression processing circuit 19, data decompression processing circuit 20, and decompression switching circuit 27
And so on. The same blocks as those of the optical disc device 100 are assigned the same numbers.

The optical disk device 400 can execute normal recording in which recording data is recorded as it is. Further, the optical disk device 400 can selectively execute decompression reproduction in which the optical disk data reproduced from the optical disk is expanded and the reproduction data is output, or normal reproduction in which the optical disk data is directly output as the reproduction data.

First, the data recording processing by the optical disk device 400 will be described.

The data recording process by the optical disc device 200 is executed according to a recording command output from the host computer 11. The recording command output from the host computer 11 is input to the system control unit 10 via the interface 9. At this time, the recording data output from the host computer 11 is input to the RAM 8 via the interface 9. This RAM
8 functions as a buffer for absorbing the data transfer rate.

Upon receiving the recording instruction, the system control unit 10
Based on the control data recorded in the memory 10a, the optical disc device 200 is caused to execute a normal recording process. That is, the system control unit 10 outputs a recording command to the recording / reproduction switching circuit 4, the optical pickup control circuit 12, the feed motor control circuit 13, the spindle motor control circuit 15, and the loading motor control circuit 17.

The recording / reproduction switching circuit 4 which has received the recording command,
Data (modulation recording data) provided from the recording signal processing circuit 6 is supplied to the laser control unit 7. Further, the recording / reproduction switching circuit 4 outputs a recording command to the laser control unit 7. Upon receiving the recording command, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a recording light beam.

The optical pickup control circuit 12 having received the recording command causes the optical pickup 2 to execute data recording. The feed motor control circuit 13 that has received the recording command controls the feed motor 14 according to the status of the data recording process. Feed spindle motor control circuit 1 receiving recording command
3 controls the spindle motor 16 according to the status of the data recording process. The feed loading motor control circuit 17 that has received the recording command controls the loading motor 18 according to the status of the data recording process.

On the other hand, the recording data input to the RAM 8 is supplied from the RAM 8 to the recording signal processing circuit 6. The recording signal processing circuit 6 modulates the recording data into a DVD-RAM signal recording format and generates modulated recording data.

The modulation / recording data generated by the recording signal processing circuit 6 is supplied from the recording signal processing circuit 6 to the laser controller 7 by the recording / reproduction switching circuit 4. The laser control unit 7 controls the laser oscillator 2a based on the modulation recording data. That is, the recording light beam emitted from the laser oscillator 2a reflects the modulation recording data.
A recording light beam on which the modulation recording data is reflected is irradiated to a predetermined position on the optical disk by the optical pickup 2. Thus, the recording of the recording data on the optical disk is completed.

Next, the data reproduction processing by the optical disk device 400 will be described.

The data reproducing process by the optical disk device 200 is executed according to a reproducing command output from the host computer 11. A reproduction command output from the host computer 11 is input to the system control unit 10 via the interface 9.

The system control unit 10 having received the reproduction command,
It causes the optical disc device 400 to execute data reproduction processing.
That is, the system control unit 10 controls the recording / reproduction switching circuit 4,
Optical pickup control circuit 12, feed motor control circuit 1
3. A reproduction command is output to the spindle motor control circuit 15 and the loading motor control circuit 17.

The optical pickup control circuit 12 which has received the reproduction command causes the optical pickup 2 to reproduce data. The feed motor control circuit 13 that has received the reproduction command controls the feed motor 14 according to the state of the data reproduction process. Feed spindle motor control circuit 1 that has received a playback command
Reference numeral 3 controls the spindle motor 16 according to the status of the data reproduction process. The feed loading motor control circuit 17 that has received the reproduction command controls the loading motor 18 according to the state of the data reproduction process.

Upon receiving the reproduction command, the recording / reproduction switching circuit 4
Data (optical disk data) provided from the RF amplifier 3 is supplied to the reproduction signal processing circuit 5. Further, the recording / reproduction switching circuit 4 outputs a reproduction command to the laser control unit 7. Upon receiving the reproduction instruction, the laser control unit 7 causes the laser oscillator 2a provided in the optical pickup 2 to emit a light beam for reproduction.

The light beam for reproduction emitted from the laser oscillator 2a is applied to a predetermined position on the optical disk by the optical pickup 2. At this time, the reflected light from the optical disk is received by the optical pickup 2. The reflected light reflects optical disk data recorded on the optical disk. The optical pickup 2 detects optical disk data from the reflected light, and supplies the detected optical disk data to the RF amplifier 3. The RF amplifier 3 amplifies optical disk data.

The optical disk data amplified by the RF amplifier 3 is supplied from the RF amplifier 3 to the reproduction signal processing circuit 5 by the recording / reproduction switching circuit 4. Reproduction signal processing circuit 5
Demodulates optical disk data according to a DVD-RAM signal recording format.

The demodulated optical disk data is supplied from the reproduction signal processing circuit 5 to the expansion switching circuit 27 and the data expansion processing circuit 20. The extension switching circuit 27 is provided with a detection circuit 27a. The detection circuit 27a detects compressed data from the demodulated optical disk. The data expansion processing circuit 20 expands the demodulated optical disk data according to a predetermined expansion method. Data expansion processing circuit 20
The optical disk data decompressed in the step (1) is supplied from the data decompression processing circuit 20 to the decompression switching circuit 27.

Then, one of the two optical disk data supplied to the decompression switching circuit 27 is selected according to the detection result of the compressed data by the detection circuit 27a. That is, one of the optical disk data just demodulated and the optical disk data demodulated and expanded is selected.

More specifically, when compressed data is detected by the detection circuit 27a, demodulated and expanded optical disk data is selected. The demodulated and expanded optical disk data is supplied as reproduction data from the expansion switching circuit 27 to the RAM 8 and stored in the RAM 8. Conversely, if no compressed data is detected by the detection circuit 27a, only the demodulated optical disk data is selected. Then, the optical disk data just demodulated is supplied as reproduction data from the expansion switching circuit 27 to the RAM 8 and stored in the RAM 8.

[0159] The reproduction data stored in the RAM 8 is supplied to the host computer 11 via the interface 9. Thus, the reproduction of the optical disk data recorded on the optical disk is completed.

As described above, the optical disk apparatus 400 of the present invention selects the expanded reproduction in which the optical disk data reproduced from the optical disk is expanded and the reproduced data is output, or the normal reproduction in which the optical disk data is directly output as the reproduced data. Can be implemented

[0161]

According to the present invention, it is possible to provide an optical disk apparatus capable of reducing complicated processing when the information amount of recording data exceeds the storage capacity of one optical disk.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a concept of a zone of a data recording area of an optical disc.

FIG. 2 is a diagram for explaining an outline of a data structure of a data recording area of the optical disc.

FIG. 3 is a diagram for explaining a rotation speed corresponding to each zone of the optical disc and the number of sectors per track in each zone.

FIG. 4 is a diagram for explaining a sector format of an optical disc.

FIG. 5 is a diagram illustrating a schematic configuration of an optical disc device according to the first embodiment.

FIG. 6 is a diagram illustrating a schematic configuration of an optical disc device according to a second embodiment.

FIG. 7 is a diagram illustrating a schematic configuration of an optical disc device according to a third embodiment.

FIG. 8 is a diagram illustrating a schematic configuration of an optical disc device according to a fourth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 2 ... Optical pick-up (recording means and reproducing means) 3 ... RF amplifier 4 ... Recording / reproducing switching circuit 5 ... Reproducing signal processing circuit 6 ... Recording signal processing circuit 7 ... Laser control part (recording means and reproducing means) 8 ... RAM 9 ... Interface (I / F) 10: System controller (first and second command means) 10a: Memory 11: Host computer 12: Optical pickup control circuit 13: Feed motor control circuit 14: Feed motor 15: Spindle motor control circuit Reference Signs List 16 spindle motor 17 loading motor control circuit 18 loading motor 19 data compression processing circuit 20 data expansion processing circuit 21 compression / expansion switching circuit (first and second selection means) 21a detection circuit (detection means) 22: first data compression processing circuit (first compression means) 23: second data compression processing Path (second compression means) 24 first data decompression processing circuit (first decompression means) 25 second data decompression processing circuit (second decompression means) 26 compression / decompression method switching circuit (first And a second selection means) 26a: detection circuit (detection means) 27: expansion switching circuit (selection means) 27a: detection circuit (detection means) 100, 200, 300, 400: optical disk device

Claims (7)

[Claims] 1. An optical disk apparatus for recording data for recording on an optical disk and reproducing the optical disk data recorded on the optical disk to output reproduced data. Compression means for generating the data, the compression recording data is reflected on a data recording light beam, and the data recording light beam on which the compression recording data is reflected is irradiated on the optical disc, and the optical disc is Recording means for recording the data for compression recording, and irradiating the optical disc with a light beam for data reproduction,
Reproducing means for receiving reflected light reflecting the optical disk data recorded on the optical disk and reproducing the optical disk data; expanding means for expanding the optical disk data and outputting the expanded optical disk data as the reproduced data An optical disk device, comprising: 2. An optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data. Compression means for generating compressed data, first instruction means for instructing recording of compressed data or recording of uncompressed data, and when recording of compressed data is instructed by the first instruction means The first selecting means selects the data for compression recording, and selects the data for recording when the recording of uncompressed data is commanded by the first command means. The selected data selected by the selecting means is reflected on the data recording light beam, and the data recording light beam reflecting the selected data is reflected on the optical disc. Recording means for recording the selected data on the optical disc; and irradiating the optical disc with a light beam for data reproduction,
Reproducing means for receiving reflected light reflecting the optical disk data recorded on the optical disk and reproducing the optical disk data; expanding means for expanding the optical disk data to generate expanded data; and reproducing the compressed data. Or second command means for commanding the reproduction of uncompressed data, and when the reproduction of the compressed data is commanded by the second command means, the decompressed data is selected as the reproduced data; An optical disk device, comprising: a second selection unit that selects the optical disk data as the reproduction data when reproduction of uncompressed data is instructed by the second instruction unit. 3. An optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data, wherein the recording data is compressed by a predetermined compression method. Compression means for generating compressed recording data including compressed data indicating the predetermined compression method; first instruction means for instructing recording of compressed data or recording of uncompressed data; When the recording of the compressed data is instructed by the first command means, the data for compressed recording is selected, and when the recording of the uncompressed data is commanded by the first command means, the data is selected. First selecting means for selecting data for recording; selecting data selected by the first selecting means on a light beam for data recording; Irradiating an optical disk with a data recording light beam in which data is reflected, and recording means for recording the selected data on the optical disk; and irradiating the optical disk with a data reproduction light beam,
A reproducing unit that receives reflected light reflecting optical disk data recorded on the optical disk and reproduces the optical disk data; an expanding unit that expands the optical disk data to generate expanded data; Detecting means for detecting data; if the compressed data is detected from the optical disk data by the detecting means, instructs reproduction of the compressed data; and the detecting means does not detect the compressed data from the optical disk data. Second instruction means for instructing the reproduction of uncompressed data in the case; and when the reproduction of the compressed data is instructed by the second instruction means, the decompressed data is selected as the reproduced data. When the reproduction of uncompressed data is commanded by the second command means, the light An optical disk device, comprising: second selection means for selecting disk data as the reproduction data. 4. An optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data, wherein the recording data is compressed by a first compression method. A first compression unit that generates first compression recording data including first compression data indicating the first compression method; and a second compression unit that converts the recording data into a second compression data different from the first compression method. A second compression unit that generates data for second compression recording including second compressed data indicating the second compression method by compressing the data using the first compression method or the second compression method. First instruction means for instructing; if the first compression method is instructed by the first instruction means, the first compression recording data is selected; and the first instruction means is used to select the first compression recording data. 2 compression method is an instruction In this case, the first compression recording data is selected.
The selection data selected by the first selection means is reflected on the data recording light beam, and the data recording light beam on which the selected data is reflected is irradiated on the optical disc. Recording means for recording the selected data on the optical disc; irradiating the optical disc with a light beam for data reproduction;
A reproducing means for receiving reflected light reflecting optical disk data recorded on the optical disk and reproducing the optical disk data; and expanding the optical disk data by a first expansion method corresponding to the first compression method. A first decompression means for generating first decompressed data; and a second decompression means for decompressing the optical disk data by a second decompression method corresponding to the second compression method to generate second decompressed data. Decompression means; second instruction means for instructing the first or second decompression method; if the first decompression method is instructed by the second instruction means, the first decompression data is And second selecting means for selecting the second decompressed data as the reproduced data when the second decompressing method is commanded by the second command means. Optical disc apparatus characterized by. 5. An optical disk apparatus for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data, wherein the recording data is compressed by a first compression method. A first compression unit that generates first compression recording data including first compression data indicating the first compression method; and a second compression unit that converts the recording data into a second compression data different from the first compression method. A second compression unit that generates data for second compression recording including second compressed data indicating the second compression method by compressing the data using the first compression method or the second compression method. First instruction means for instructing; if the first compression method is instructed by the first instruction means, the first compression recording data is selected; and the first instruction means is used to select the first compression recording data. 2 compression method is an instruction In this case, the first compression recording data is selected.
The selection data selected by the first selection means is reflected on the data recording light beam, and the data recording light beam on which the selected data is reflected is irradiated on the optical disc. Recording means for recording the selected data on the optical disc; irradiating the optical disc with a light beam for data reproduction;
A reproducing means for receiving reflected light reflecting optical disk data recorded on the optical disk and reproducing the optical disk data; and expanding the optical disk data by a first expansion method corresponding to the first compression method. A first decompression means for generating first decompressed data; and a second decompression means for decompressing the optical disk data by a second decompression method corresponding to the second compression method to generate second decompressed data. Expanding means; detecting means for detecting the first or second compressed data from the optical disk data; and detecting the first or second compressed data from the optical disk data by the detecting means.
When the first compressed data is detected, the first decompression method is instructed. When the second compressed data is detected from the optical disk data by the detection means, the second decompression method is commanded.
Second command means for commanding the first decompression method, and when the first decompression method is commanded by the second command means, the first decompression data is selected as the reproduction data. An optical disk device, comprising: a second selection unit that selects the second decompressed data as the reproduction data when the second decompression method is commanded by the command unit. 6. An optical disk device for recording data on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduced data, wherein the recording data is converted to a light beam for data recording. A recording means for irradiating the optical disc with a data recording light beam on which the recording data is reflected, and recording the recording data on the optical disc; and a data reproducing light beam on the optical disc. Irradiate the beam,
Reproducing means for receiving reflected light reflecting the optical disk data recorded on the optical disk and reproducing the optical disk data; expanding means for expanding the optical disk data to generate expanded data; and reproducing the compressed data. Or command means for commanding the reproduction of uncompressed data; and when the command means commands the reproduction of the compressed data, the decompressed data is selected as the reproduction data, and the compressed data is selected by the command means. Selecting means for selecting the optical disk data as the reproduced data when a command to reproduce data that has not been issued is provided. 7. An optical disk apparatus for recording data for recording on an optical disk and reproducing the optical disk data recorded on the optical disk to provide reproduction data, wherein the recording data is converted to a light beam for data recording. A recording means for irradiating the optical disc with a data recording light beam on which the recording data is reflected, and recording the recording data on the optical disc; and a data reproducing light beam on the optical disc. Irradiate the beam,
A reproducing unit that receives reflected light reflecting optical disk data recorded on the optical disk and reproduces the optical disk data; an expanding unit that expands the optical disk data to generate expanded data; Detecting means for detecting data; if the compressed data is detected from the optical disk data by the detecting means, instructs reproduction of the compressed data; and the detecting means does not detect the compressed data from the optical disk data. Command means for instructing reproduction of uncompressed data in the case; and, when reproduction of compressed data is instructed by the command means, the decompressed data is selected as the reproduced data. If the playback of unrecorded data is commanded, the optical disk data An optical disc device, comprising: a selection unit that selects the reproduction data.