JP2000137952A - Recording medium, recording method and device and reproducing method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve availability in a recording medium by collectively recording a block consisting of the number of fixed sectors at every variable plural blocks according to a recording condition of an information signal and providing a linking sector after it. SOLUTION: For instance, the information is recorded on a DVD-RW disk by using an MPEG2 of a companding technique. At this time, rotation is controlled with a constant linear velocity, and one block is constituted of continuous 16 sectors, and this block is made a processing unit (ECC block) of error correction. When capacity of a track buffer is sufficiently large, e.g. the information is recorded on the disk intermittently at every 16 ECC block, and one sector of linking sector is provided after it as a sacrifice sector. At a recording time, the recording is interrupted on the way of the linking sector, and at the time of recording next, the recording is restarted from the position minutely becoming overwriting. At a reproducing time, when the data by 16 ECC blocks much are read in, next one sector is skipped to be read.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an optical information recording member centered on an optical disk, and uses an optical method using a laser beam or the like as the optical information recording member to provide a high-speed and high-density information signal. , A recording method and apparatus for recording compressed signals and the like at high speed and high density on the recording medium, and a high speed recording medium for recording compressed signals and the like on the recording medium. More particularly, the present invention relates to a reproducing method and apparatus for reproducing a signal, particularly, for example, a DVD standardized as a so-called DVD (digital video disc or digital versatile disc).
A recording medium such as a DVD-RW (rewritable) having compatibility with video, DVD audio, DVD-ROM (read only memory), etc., a recording method and apparatus for the DVD-RW, and reproduction. The present invention relates to a method and an apparatus.

[0002]

2. Description of the Related Art Conventionally, as a recording / reproducing apparatus for recording / reproducing a compressed signal on an optical disk at high speed and high density, a so-called DVD-RAM apparatus, DVD-RW apparatus,
There are MD (mini disk) devices and the like.

[0003] These recording / reproducing devices include a signal compression / compression system.
A storage unit (memory) for temporarily storing data is provided in order to perform expansion and prevent occurrence of a recording / reproducing error due to external vibration or the like.

For example, an MD device is provided with a memory such as a D-RAM (dynamic RAM) having a 4M (mega) bit capacity corresponding to about 10 seconds of a music signal. While the data reproduced from the optical disk is temporarily stored in a memory, and the data is read out from the memory to reproduce the music signal, the next sector (track) to be reproduced on the optical disk.
The trace position of the optical head is moved upward (kick or track jump), and the optical head is made to stand by (stand by with the optical disk rotated) on the sector to be reproduced.

In recording data on an optical disk,
The input signal to be recorded is compressed and stored in the memory, and when a predetermined amount of compressed data is stored in the memory, the compressed data is read from the memory and recorded on the optical disk, and the next compressed data is stored in the memory. During this operation, the trace position of the optical head is moved (kick or track jump) to the next sector (track) to be recorded on the optical disk, and the optical head is kept on standby on the sector to be recorded. Like that.

As described above, in the MD device, the memory is used to intermittently record / reproduce data on / from the optical disk. A memory that temporarily stores data to prevent occurrence of a recording / reproducing error due to external vibration or the like is called a shock-proof memory.

For example, in a DVD device, an MD
Like the device, a memory having a capacity of 4 Mbits is provided, and data is transferred at a variable transfer rate using this memory.

Here, if the data transfer rate of the DVD device is 8 Mbps (bits / second), data of about 0.5 seconds can be stored in a memory of 4 Mbits. The time for which the optical head is kept on standby (the time for kicking or the rotation waiting time) is also about 0.5 seconds.

However, in recent years, it has become difficult to obtain a 4 Mbit D-RAM which has been used conventionally, and at present, a 16 Mbit or more D-RAM is used.
-It is becoming common to use RAM. In addition, the prices of these D-RAMs are becoming cheaper. When these 16-Mbit or more D-RAMs are used, data for 2 seconds or more can be temporarily stored at a data transfer rate of 8 Mbps. If a 64 Mbit D-RAM is used, 8
It is possible to temporarily store data for 8 seconds at a data transfer rate of Mbps.

As described above, a technique for providing a memory for temporarily storing data to be recorded / reproduced and for recording / reproducing a signal at one transfer rate using the memory is disclosed in, for example, 59-172169 and JP-A-5-172169.
Based on the technology disclosed in -128531, for example.

A technique for reproducing or recording high-density information using a laser beam is also known.
It has been put to practical use mainly when an optical disk is used as a recording medium.

Here, optical disks can be broadly classified into a read-only type, a write-once type, and a rewritable type. The read-only type is a compact disk (C
D) and video CDs (VCDs) and DVs that record image information.
CD-R, DVD, etc.
-R etc. are commercialized. Furthermore, at present, CD-RW, DVD-RAM, DVD
-RW and the like are being commercialized as video files, audio recordings, data files for personal computers, and the like.

The rewritable type is realized by providing a recording thin film on an optical disc which reversibly changes between two or more states by changing the irradiation conditions of a laser beam or the like. There is a phase change type. Of these, phase-change type optical disks record signals by changing the recording film reversibly between amorphous (non-crystalline) and crystalline by changing the irradiation conditions of laser light, and record the signal. The difference is optically detected and reproduced. Therefore, the rewritable type can reproduce a signal as a change in the reflectance of laser light, similarly to the read-only type or the write-once type. Since one beam can be used, there is an advantage that the device configuration can be simplified.

As a method of recording a signal on a rewritable optical disk which has been commercialized, an edge position before and after a recording mark has a pulse width corresponding to "1" of a digital signal in order to further increase the recording density. A modulation method (hereinafter, referred to as PWM) has been studied. In the PWM method, since the width of a recording mark has information, it is necessary to record the recording mark without distortion, that is, in a symmetrical manner.

[0015]

By the way, if continuous data is to be recorded intermittently on a write-once or rewritable optical disk, for example, as in the case of the above-mentioned shock-proof memory of the MD device, In a case where continuous data is intermittently recorded using a simple buffer memory, continuous data that is originally continuous is discontinuous at a portion where recording and recording are switched.

When reproducing such a disc, it is only necessary to correct the discontinuous data at the recording / recording switching portion by the error correction function of the reproducing apparatus. is there.

As one method for solving this problem, for example, in an MD device which is a general optical disk recording device, as described in Japanese Patent Application Laid-Open No. 6-333467, for example, continuous 32 sectors are used as one unit of error correction. Further, a linking sector area of, for example, 4 sectors is allocated to one unit of the error correction, and the linking section between recording and recording is connected using the linking sector area.

However, since the four sectors in the linking sector area are not used for actual data recording, the actual recording capacity of the optical disc is reduced. That is, in the case of the MD device, in one block (1 cluster) composed of a total of 36 sectors of 32 sectors, which is one unit of error correction, and 4 sectors of the linking sector area, only 32 sectors can actually record data. Therefore, what can actually be used for data recording on an optical disc is
It is only 32/36 = 8/9 of the total capacity. For example, a DVD having a recording capacity of 4.7 GB (gigabytes)
-If the method used in the MD device described above is directly used for the RW, the actual recordable capacity is 4.7 * 8 /
9 = 4.17 GB.

On the other hand, Japanese Patent Application Laid-Open No. 8-297920 discloses a method of recording data having a large information amount on a disk having a plurality of clusters each composed of a data section of 32 sectors and a linking section of 4 sectors. There is disclosed an apparatus that records data over a plurality of clusters and also records data in a linking unit so that the recording area of the disc can be used effectively.

However, in actual error correction and other signal processing, since the processing unit is the length of 32 sectors of the data section, data is also recorded in the linking section of 4 sectors as described above. In such a case, it is difficult to determine how to determine a processing unit for error correction or the like at the time of recording. Also, at the time of reproduction, it is difficult to determine from and to which sector data the error correction should be performed. As a result, error correction becomes impossible, and data may be reproduced.

[0021] The present invention has been made in view of the above-mentioned problems, and enables a recording medium to be used with maximum use efficiency, and manages processing units such as error correction during recording and reproduction. It is an object of the present invention to provide a recording medium, a recording method and an apparatus, and a reproducing method and an apparatus that can facilitate and prevent occurrence of a data error during reproduction.

[0022]

In order to solve the above-mentioned problems, a recording medium according to the present invention forms one block by a plurality of sectors, and varies the number of blocks according to a recording condition of an information signal. A linking sector is provided after a coherent and variable number of blocks.

Here, in the recording medium of the present invention, the recording conditions include at least a mode for continuously recording information signals, a mode for intermittent recording for each block, and a mode for intermittent recording for a plurality of blocks. Any one of the recording modes or a combination thereof is used according to the recording conditions. Further, the recording medium of the present invention is provided with a linking management area for recording information for managing a linking sector, and in the linking management area, information on a variable number of blocks is recorded as information for managing the linking sector. Become. Alternatively, in the linking management area, a linking sector correspondence table for each block is recorded as information for managing the linking sector.

In order to solve the above-mentioned problems, a recording method according to the present invention includes a step of forming one block with information signals corresponding to a plurality of sectors of a recording medium, and a step of performing a predetermined signal processing on one block of the information signal. , Changing the number of blocks according to the recording condition of the information signal, and recording; and providing a linking sector after the variable number of blocks in a unitary manner and recording.

According to another aspect of the present invention, there is provided a recording apparatus comprising: a block forming unit configured to form one block with information signals corresponding to a plurality of sectors of a recording medium; Signal processing means for performing predetermined signal processing, and recording means for recording while varying the number of blocks according to the recording condition of the information signal, and providing and recording a linking sector after the variable number of blocks in unity Have.

In order to solve the above-mentioned problems, a reproducing method according to the present invention includes a step of reproducing an information signal of one block including a plurality of sectors from a recording medium, and a step of performing a predetermined signal processing on the information signal of one block. And a step of performing reproduction control for skipping a linking sector provided after the number of blocks changed according to the recording condition of the information signal.

According to another aspect of the present invention, there is provided a reproducing apparatus which reproduces one block of an information signal composed of a plurality of sectors from a recording medium, and reproduces one block of the information signal in a predetermined manner. It has a signal processing means for performing signal processing, and a reproduction control means for performing reproduction control for skipping a linking sector provided after the number of blocks changed according to the recording condition of the information signal.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the recording medium, recording method and apparatus, reproducing method and apparatus according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of an optical disk apparatus as an embodiment to which a recording medium, a recording method and an apparatus, and a reproducing method and an apparatus according to the present invention are applied. In the embodiment of the present invention, for example, MP
A rewritable DVD-RW is cited as an example of an optical disk employing EG2. In the configuration of FIG. 1,
Many parts normally provided in a so-called DVD device or the like are omitted.

In FIG. 1, an optical disk 1 is a recording type optical disk made of, for example, a phase change material. In this embodiment, for example, a so-called DVD-RW disk is used. In the DVD-RW disc, sectors (tracks) are spirally arranged in the disc, the rotation is controlled at a constant linear velocity (CLV), and one block is composed of 16 consecutive sectors. The block is a unit of processing for error correction (hereinafter, referred to as an ECC block). The optical disc 1 is attached to the spindle motor 2 by a chucking mechanism (not shown).

The spindle motor 2 is driven to rotate by a driver 7 and rotates the optical disk 1 chucked by a chucking mechanism. The spindle motor 2 includes an FG generator and a means for detecting a rotational position signal such as a Hall element. The FG signal from the FG generator and the rotation position signal from the Hall element are fed back to the servo unit 8 via the driver 7 as a rotation servo signal.

The optical head 3 uses a semiconductor laser as a light source and forms a laser spot on a predetermined track of the optical disk 1 by using a collimator lens, an objective lens, and the like.
In addition, focusing and tracking of a laser spot are performed by driving an objective lens with a biaxial actuator. The semiconductor laser is driven by a laser drive circuit, and the biaxial actuator is driven by a driver 7.

The key input unit 10 includes a plurality of keys operated by the user, and sends key operation input information from the user to the system controller 9. That is, from the key input unit 10, recording start, reproduction start, recording stop,
Various key operation input information for instructing stop of reproduction and the like can be input by the user.

The interface unit 13 is an interface for transmitting and receiving data to and from a computer or the like, for example, a so-called ATAPI (ATA Packet).
Interface).

The system controller 9 includes a key input unit 1
As key operation input information from 0, various types of key operation input information such as recording start, reproduction start, recording stop, reproduction stop, etc.
(The signal processing unit 5, the servo unit 8, the amplifier unit 4, the AV encoding / decoding unit 6, etc.). In addition, data is transmitted and received via the interface unit 13. For example, in the case where the resolution of an image to be recorded or a high-speed scene such as a car race is selected, control data or the like for setting with priority on the recording time may be input from the key input unit 10 or the input terminal 12. , The system controller 9
The control data is recognized, the recording time is changed based on the recognition result, and the setting can be selected by an external user.

When a signal is to be reproduced from the optical disk 1, for example, a reproduction start command is issued from the key input unit 10. At this time, the system controller 9 responds to the reproduction start command by an amplifier (to be described later). The control unit 4 controls the servo unit 8 and the driver 7. That is, the optical disk 1
When a signal is reproduced from the system controller 9
First, the optical disc 1 is rotated and a laser spot is irradiated onto the optical disc 1, an address signal formed in advance on a signal track on the optical disc 1 is read, and a target sector (to be reproduced) is read from the address information. The optical head 3 is moved so that the laser spot is located on the target sector (track). After the movement to the target sector is completed, signal reproduction from the target sector is started.

The amplifier unit 4 during reproduction of the optical disk 1 amplifies the RF signal reproduced from the target sector of the optical disk 1 by the optical head 3, and reproduces a reproduction signal and a tracking and focusing servo signal (tracking) from the RF signal. Error and focus error signals). Further, the amplifier unit 4 includes an equalizer that optimizes at least the frequency characteristics of the reproduced signal, a PLL circuit (phase locked loop) that extracts a bit clock from the reproduced signal and generates a speed servo signal, and a signal from the PLL circuit. And a jitter generation circuit for extracting a jitter component from a comparison between the bit clock and the time axis of the reproduction signal. The jitter value generated by the amplifier unit 4 is sent to the system controller 9, and the tracking and focusing servo signal and the speed servo signal are sent to the servo unit 8,
The reproduced signal is sent to the signal processing unit 5.

The servo section 8 receives the speed servo signal from the amplifier section 4 and the focusing and tracking servo signals of the optical head 3, and receives the spindle motor 2
And performs a servo control of a corresponding portion based on each of the servo signals. More specifically, the servo unit 8 controls the PL of the amplifier unit 4.
Based on the speed servo signal generated by the L circuit according to the disk rotation speed and the rotation servo signal from the spindle motor 2, the spindle motor 2 is rotated at a predetermined rotation speed, that is, the optical disk is rotated at a predetermined constant speed. A rotation speed servo control signal for rotating at a linear velocity is generated. Although details will be described later, in the present embodiment, a recording speed (recording data transfer rate) higher than the maximum data transfer rate at the time of internal compression / expansion is used.
The recording / reproducing of the optical disc 1 is performed at a reproducing speed (reproducing data transfer rate). Therefore, the servo unit 8 rotates the optical disc 1 at a constant linear speed that matches the recording speed / reproducing speed. A rotation speed servo control signal is generated. Further, the servo unit 8 generates an optical head servo control signal for the optical head 3 to accurately perform focusing and tracking on the optical disc 1 based on the focusing and tracking servo signals. The rotation speed servo control signal and the optical head servo control signal are sent to the driver 7. After this,
The recording speed (recording data transfer rate) of the optical disk 1 is called a recording rate, and the reproduction speed (reproduction data transfer rate) of the optical disk 1 is called a reproduction rate.

The driver 7 operates on the basis of each servo control signal from the servo section 8. The driver 7 drives the spindle motor 2 to rotate in accordance with the rotation speed servo control signal from the servo section 8, and also controls the optical head servo. The two-axis actuator of the optical head 3 is driven according to the control signal.
In the present embodiment, the driver 7 drives the spindle motor 2 in accordance with the rotation speed servo control signal, thereby rotating the optical disc 1 at a predetermined linear speed.
Further, the driver 7 drives the biaxial actuator of the optical head 3 according to the optical head servo control signal, so that focusing and tracking of the laser spot on the optical disk are performed.

The signal processing unit 5 when reproducing the optical disc 1
The reproduction signal supplied from the amplifier unit 4 is A / D (analog / digital) converted, synchronization is detected from the digital signal obtained by the A / D conversion, and a so-called EFM + signal applied to the digital signal is converted. (8-1
6 modulated signals) to NRZ (Non Return to Zero) data, and further perform error correction processing.
The address data and the reproduction data of the sector on the optical disk 1 are obtained. The address data and the synchronization signal obtained by the signal processing unit 5 are sent to the system controller 9. In addition,
The details of the error correction processing and the like performed by the signal processing unit 5 will be described later.

Here, the reproduction data is, for example, MPEG
In the case of the data compressed and encoded at the variable transfer rate, the optical disk device of the present embodiment temporarily stores the data in, for example, a 64-Mbit D-RAM (track buffer memory 7), By controlling the writing / reading of the memory 7, the time variation of the variable transfer rate of the reproduced data is absorbed. Note that the track buffer memory used in the present embodiment refers to a buffer memory that temporarily stores compressed data, for example, for absorbing a variable transfer rate generally provided in DVD. It includes a buffer memory and a buffer memory used for MPEG encoding and decoding. The management of the storage capacity and storage area of the track buffer memory 7 and the write / read control are performed by the system controller 9 via the signal processing unit 5, for example. In addition, compression encoding of data,
The details of the operation of managing and controlling the track buffer memory 7 during data reproduction will be described later. Hereinafter, the speed of writing to the track buffer memory 7 (write data transfer rate) is referred to as a write rate, and the speed of reading (read data transfer rate) is referred to as a read rate. The reproduction data read from the track buffer memory 7 is transmitted to the A through the signal processing unit 5.
It is sent to a V encoding / decoding unit (A-V ENDEC) 6.

The AV encoding / decoding section 6 at the time of reproducing the optical disk 1 converts the reproduction data supplied from the track buffer memory 7 into data obtained by compression-encoding, for example, MPEG2 and multiplexing audio data and video data. , The multiplexed compressed audio data and compressed video data are separated, and
The data is decompressed and decoded at 2, and D / A (digital / analog) converted, and output from the terminal 11 as an audio signal and video signal. The video signal output from the terminal 11 is supplied to an NTSC (National Televisio) (not shown).
n System Committee) Processed by an encoder or the like and displayed on a monitor device, and the audio signal is sent to a speaker or the like (not shown) and emitted. Note that the speed of the decompression decoding by the AV encoding / decoding unit 6 at the time of this reproduction (the data transfer rate at the time of decompression decoding; hereinafter, referred to as the decompression rate) is the recording speed set at the time of recording, which will be described later. The expansion rate is set according to the mode. In other words, the AV encoding / decoding unit 6 is capable of performing expansion / decoding processing according to a plurality of expansion rates, determines the expansion rate in accordance with a recording mode set at the time of recording, and determines the expansion rate at that rate. Perform decompression decoding. The information of the recording mode is recorded on the optical disc 1 together with the recording data as control data, and the control data is read out when the optical disc 1 is reproduced and sent to the system controller 9. The decompression rate of the AV encoding / decoding section 6 is set. The D / A conversion can be performed outside the AV encoding / decoding unit 6.

On the other hand, when performing signal recording on the optical disk 1, for example, a recording start command is issued from the key input unit 10, and the system controller 9 responds to the recording start command by the amplifier unit 4 and the servo unit. 8 and the driver 7 are controlled. That is, when performing signal recording on the optical disc 1, first, the optical disc 1 is rotated and a laser spot is irradiated on the optical disc 1, and an address signal formed in advance on a signal track on the optical disc 1 is read. The target sector (track) to be recorded is found from the address information, and the optical head 3 is moved so that the laser spot is arranged on the target sector (track). The details of the address signal recorded in advance on the optical disc 1 will be described later.

From the terminal 11, audio and video signals to be recorded are input, and these signals are sent to the AV encoder / decoder 6.

At the time of recording on the optical disk, the AV encoding / decoding section 6 converts the audio signal and the video signal into A signals.
/ D conversion, and converts the audio data and the video data into MPEG2 data at a speed corresponding to a recording mode described later.
And then multiplexes them and sends them to the signal processing unit 5. Hereinafter, the speed of compression encoding (data transfer rate at the time of compression encoding) in the AV encoding / decoding unit 6 is referred to as a compression rate. That is, the AV encoding / decoding unit 6 can perform compression encoding at a plurality of compression rates according to the recording mode.

The 16-Mbit D-RAM 8 stores A
This is a memory for temporarily storing data at the time of compression / expansion in the V encoding / decoding section 6. This D-RAM8
May have a capacity of 64 Mbits. Also, the A / D conversion can be performed outside the AV encoding / decoding unit 6.

The apparatus according to the present embodiment can record and reproduce still image information and data such as program files on a computer in addition to video and audio information.
In this case, data such as still image information and a program file is supplied from the interface unit 13, and the data is sent to the signal processing unit 5 via the system controller 9.

At the time of recording on the optical disk, the signal processing unit 5 adds an error correction code to the compressed data from the AV encoding / decoding unit 6 and data such as a program file via the system controller 9 to add an NRZ code. And EFM +
, And further adds a synchronization signal supplied from the system controller 9 to generate recording data.

Here, the recording data is temporarily stored in the track buffer memory 7 and then read from the track buffer memory 7 at a reading rate corresponding to the recording rate on the optical disc 1. In addition,
The details of the management of the storage capacity and storage area of the track buffer memory 7 and the write / read control during this recording will be described later. The recording data read from the track buffer memory 7 is D / A
The converted signal is sent to the amplifier unit 3 as a recording signal, and is recorded by the optical head 3 on a target sector (track) on the optical disc 1.

At this time, the system controller 9
A / D (analog / digital) converts the jitter value from the amplifier unit 4 for measurement, and changes the waveform correction amount in the amplifier unit 4 during recording according to the measured jitter value or asymmetry value. That is, when recording a signal on the optical disk 1, the amplifier unit 4 corrects the waveform of the signal from the signal processing unit 5 and sends the signal whose waveform has been corrected to the laser drive circuit of the optical head 4.

Next, the address of the data area on the optical disk 1 according to the embodiment of the present invention will be described below.

The optical disk 1 of this embodiment is a DVD-RW disk conforming to the DVD standard.
Not only the VD-RW but also a write-once or rewritable optical disc usually has sector addresses previously recorded or formed on the disc in order to enable address control during recording. However, in the conventional optical disc, the address recording is performed by wobbling the groove at a frequency modulated based on the address data. However, in the case of the DVD-RW of the present embodiment, a higher speed and higher In order to enable high-density recording, a so-called L which forms a predetermined pit in a land portion on the disk together with the address recording by the wobbling is called.
A PP (land pre-pit) address system is adopted.

Here, when data is actually recorded on the optical disk, a sector address (hereinafter simply referred to as an LP address) based on an LPP address previously recorded on the optical disk is used.
In general, a sector address (hereinafter, referred to as a data address) included in recording data to be actually recorded is made to coincide with each other. The relationship between the LPP address and the data address as shown in FIGS. 2 to 4 can be obtained according to the recording conditions when recording a signal in the area.

In FIGS. 2 to 4, each hexadecimal number in the figures represents the address of a sector, and 16 digits corresponding to the last digit "0" to "F" of each number. 1EC which is a unit of error correction in one sector
A C block is configured. Also, L in FIGS.
The PP address is a sector address based on LPP (land prepit) formed in advance on a land portion on the disk, and the data address is a sector address included in recording data to be actually recorded. “X” in FIGS. 3 and 4 represents a linking sector (linking). However, FIGS. 2 to 4 are examples, and the present invention is not limited to these.

FIG. 2 shows the relationship between the LPP address and the data address when data is continuously recorded in the data area of the optical disk 1.

That is, when data is continuously recorded, in the data area on the optical disk 1, the LPP address and the data address match, and recording discontinuity such as in the case of intermittent recording is performed. No parts occur,
Therefore, there is no need to allocate a sector for linking. In this case, the data address control during recording / reproduction is as follows.
What is necessary is just to control according to an LPP address.

As an example of continuous data recording, for example, there is a case where data reproduced from a normal DVD is entirely recorded on a DVD-RW. In this case, data is continuously recorded on the DVD-RW disc.
The relationship between the PP address and the data address can be made to match.

In the case of the address relationship shown in FIG. 2, almost the entire recording capacity of the optical disk 1 can be used for data recording, and the optical disk 1 can be used with the maximum use efficiency. Of course, in the case of the address relationship shown in FIG. 2, since there is no linking sector at the switching portion between the recording and the recording, there is no influence on the error correction in the ECC block unit. Therefore, the data cannot be reproduced during the reproduction. .

FIG. 3 shows the relationship between the LPP address and the data address when data is intermittently recorded in the data area of the optical disc 1, for example, every 16 sectors of one ECC block.

For example, in a case where data is intermittently recorded every 16 sectors of one ECC block,
By arranging a linking sector in each ECC block, the data area on the optical disc 1
Recording discontinuities occur in the C block. In the discontinuous portion, there is a possibility that data continuity is lost and, for example, even if error correction is performed, the data cannot be corrected normally.

From the above, in the present embodiment,
Discontinuous portions of data are not arranged in each ECC block. That is, in the present embodiment, 16
A linking sector of one sector is provided for every one ECC block composed of sectors, and this linking sector is provided as a discarded sector, that is, a sector for skipping during reproduction. The linking sector, which is a discarded sector, is not assigned a data address. However, in this case, the data address is shifted by one sector every 16 sectors from the LPP address.

Thus, in the case of the address relationship of FIG.
By providing a linking sector every 16 ECC blocks and not giving a data address to each linking sector, the data address is shifted from the LPP address by one sector every 16 sectors. Since the number of data sectors existing between the sectors maintains a relationship of 16 sectors of the ECC block which is a unit of error correction, a processing unit such as error correction at the time of recording and at the time of reproduction does not shift. For example, data cannot be reproduced during reproduction.

The sector management in the example of FIG. 3 will be described more specifically.

In the case where recording is performed by allocating a linking sector of one sector for every one ECC block as in the example of FIG. 3, if data for 16 sectors of one ECC block is recorded, the next sector is used as a linking sector. The recording is interrupted in the middle of this linking sector, and when the recording is resumed next, the recording is started from the next sector of the linking sector from a position slightly before the interrupted position (so as to be slightly overwritten). Is performed to start the sector management.

That is, as shown in FIG. 3, when the recording is started from the LPP address “0”, the address of the data sector (data address) is “0” and the end of one ECC block (16 sectors) is “0”. Is "F", and the next sector is a linking sector. Since no data address is given to this linking sector, the next data address of the linking sector is "10" with respect to "11" of the LPP address.
Becomes The address of the last data sector of the next 1 ECC block (16 sectors) from the data sector at the address “10” is “1F”, and the next sector is a linking sector. The next data address of the linking sector is “2” with respect to “22” of the LPP address.
0 ". The same applies to the following, and the data address after one ECC block is decremented by one with respect to the LPP address.

On the other hand, when playing back an optical disk on which a linking sector of one sector is allocated every other ECC block as described above, if data of 16 sectors has been played, the next sector is discarded. Since this is a linking sector, sector management is performed such that reading is skipped and reproduction is performed from the sector next to the linking sector.

That is, when the reproduction is started from the address "0" of the data sector, the reproduction is started from the LPP address "0", and after the reproduction of one ECC block (16 sectors), the discard sector is started. In order to skip one sector of the linking sector, the reproduction is performed from the LPP address of "11" (one incremented LPP address) obtained by adding one sector to "10" of the LPP address corresponding to the linking sector. . After reproducing the next 1 ECC block (16 sectors) from the LPP address of “11”, the LPP address is further incremented by 1 and reproduction is performed from the address of “22”. At the time of reproduction, the reproduction is repeated while incrementing the LPP address by 16 + 1 = 17 (sectors) obtained by adding one sector to 16 sectors.

When the optical disk 1 is reproduced, for example, when searching for a target address, it is assumed that the LPP address corresponding to the target address is "Y" starting from "0" of the LPP address which is the start address. ,
By calculating Y * 17/16 = YY and searching for the YY address, it is possible to reach the target data address.

FIG. 4 shows the relationship between the LPP address and the data address when data is intermittently recorded, for example, every 16 ECC blocks in the data area of the optical disk in the present embodiment.

As described above, when data is intermittently recorded for every 16 ECC blocks, if a linking sector is arranged in an ECC block, for example, the data area on the optical disc 1 has the 16 ECC blocks.
A discontinuous portion of recording occurs for each block, and in this case also, the discontinuous portion loses data continuity. For this reason, in this embodiment, a linking sector is not provided in an ECC block, but a linking sector of one sector is provided as a discarded sector every 16 ECC blocks.

In the example shown in FIG. 4, the data address is shifted by one sector every 16 ECC blocks with respect to the LPP address, that is, by one sector every 16 * 16 = 256 (sectors). Become.

However, in the case of the address relationship shown in FIG. 4, the data address is shifted by one sector every 16 ECC blocks with respect to the LPP address, but each ECC block existing between linking sectors is 16 bits.
Since it is completed as an ECC block of a sector, processing units for error correction and the like at the time of recording and at the time of reproduction do not shift, so that data cannot be reproduced at the time of reproduction.

In the case of the address relationship shown in FIG.
Since the number of linking sectors is one for every 16 ECC blocks, and the number of linking sectors as discard sectors that cannot be used for data recording is very small, the use efficiency of the optical disc 1 can be improved.

The sector management in the example of FIG. 4 will be described more specifically.

As in the example of FIG. 4, for example, when recording is performed by allocating one sector linking sector every 16 ECC blocks, if 256 sectors of data are recorded, the next one sector is used as a discard sector. A linking sector is set, the recording is interrupted in the middle of the linking sector, and when the recording is restarted next, the recording is started from a position slightly before the interrupted position (so as to be slightly overwritten) of the linking sector. Sector management is performed as follows.

That is, as shown in FIG. 4, when recording is started from the LPP address "0", the address of the data sector is "0" and the address after 16 ECC blocks (256 sectors) is "FF". "
The next sector is a linking sector. The next data address of the linking sector is “100” with respect to “101” of the LPP address. The same applies to the following, and the data address after 16 ECC blocks is decremented by one with respect to the LPP address.

On the other hand, when reproducing an optical disk on which a linking sector of one sector is allocated every 16 ECC blocks as described above, if data of 256 sectors is reproduced, the next sector is discarded. Since the linking sector is skipped, the sector management is performed such that the read is skipped and the reproduction is performed from the sector next to the linking sector.

That is, when reproduction is started from the data address "0", reproduction is started from the LPP address "0", reproduction is started from the data sector address "0", and 16 ECC blocks (256 sectors) are used. After the reproduction of the linking sector, the LPP address of “101” is obtained by adding one sector to “100” of the LPP address corresponding to the linking sector in order to skip one sector of the linking sector which is a discarded sector. Reproduction is performed from (1 incremented LPP address). The same applies hereinafter.
At the time of reproduction, 2 sectors obtained by adding 1 sector to 256 sectors
Reproduction is repeated while incrementing the LPP address by 56 + 1 = 257 (sectors).

When the optical disc 1 is reproduced, for example, when searching for a target address, it is assumed that the starting address is the LPP address “0” and the LPP address corresponding to the target address is Y. ,
By calculating Y * 257/256 = YY and searching for the YY address, it is possible to reach the target data address.

The address relationships as shown in FIGS. 2 to 4 may be such that only one address relationship is used for one optical disc, or a data recording area in one disc is divided and each divided area is divided. It is also possible to have a different address relationship for each. When different address relationships are set within one disc, the optical disc 1 is configured to store, for example, an EA area having the address relationship shown in FIG. 2, an EB area having the address relationship shown in FIG. 3, and an address relationship shown in FIG. It is divided into EC areas and the like, and recording / reproducing is performed in an address relationship corresponding to each divided area.

In the present embodiment, in order to be able to know at the time of subsequent reproduction that recording having an address relationship as shown in FIGS. For example, a management data area is provided in a so-called RMA (Recording Management Area), and information indicating the address relationship is recorded in this management data area.

FIGS. 5 to 8 show examples of information in the management data area which is updated each time recording is performed. In the present embodiment, the linking mode shown in FIG. Linking intervals shown in FIGS. 6 and 7,
The mapping information indicating the presence or absence of linking for each address of the ECC block shown in FIG. 8 is used.

Here, the linking mode recorded in the management data area in FIG. 5 is information indicating how many linking sectors are present between the recording start address and the recording end address. The linking mode “0” indicates that there is no linking sector, the linking mode “1” indicates that a linking sector of one sector is arranged every one ECC block, and the linking mode “2” indicates that one sector of the linking sector is arranged every 16 ECC blocks. Indicates that a linking sector has been allocated.

Therefore, when reproducing the optical disc 1 in which the linking mode, the start address and the end address are recorded in the management data area, the start address and the end address of the management data area and the linking mode are read, and the linking sector is read. Is determined to be an unnecessary sector and skip reproduction is performed.

The linking mode is set for the optical disc 1
Each time data recording is performed, the start address and the end address of the recording are updated.

FIG. 5 shows that one disk is divided into a plurality of areas EA, EB, EC, and each area EA, EB, EC is divided into a plurality of areas.
An example is shown in which ECs have different address relationships. In the management data area in FIG. 5, the EA area having the address relationship of FIG. 2 has the linking mode “0”, the EB area having the address relationship of FIG. 3 has the linking mode “1”, and the address relationship of FIG. EC with
The area is recorded as linking mode “2”.

The linking interval recorded in the management data area in FIG. 6 basically has substantially the same meaning as in the linking mode in FIG. 5, and a linking sector is provided between a recording start address and an end address. How many ECC
It is information that is expressed in hexadecimal notation whether it exists in each block.

That is, in FIG. 6, the linking interval “0” indicates that a linking sector exists every 0 ECC blocks, that is, there is no linking sector, and the linking interval “1” is 1 EC.
A linking sector of one sector is arranged every C blocks, and a linking interval “F” indicates that a linking sector of one sector is arranged every 16 ECC blocks.

Also in the case of the example of FIG. 6, when reproducing the optical disc 1 in which the linking interval, the start address and the end address are recorded in the management data area, the start address and the end address of the management data area, the linking interval, and the like. Is read, and the skipping reproduction is performed assuming that the linking sector is an unnecessary sector.

The linking interval is updated together with the recording start address and the recording end address each time data is recorded on the optical disk 1.

FIG. 6 shows that one disk is divided into a plurality of areas EA, EB, and EC, and each divided area EA, EA,
FIG. 6 shows an example in which the EB and the EC have different address relations. Therefore, in the management data area in the case of FIG. 6, the EA area having the address relation of FIG. The EB area having the address relationship shown in FIG. 3 is recorded as the linking interval “1”, and the EC area having the address relationship shown in FIG. 4 is recorded as the linking interval “F”.

In the examples shown in FIGS. 4 and 6, the number of ECC blocks between linking sectors, which are discarded sectors, is fixed.
The number of CC blocks can be arbitrarily changed. Further, when the number of variable ECC blocks between the linking sectors is divided into a plurality of data areas in one disk, a plurality of types can be mixed in each divided area.

FIG. 7 shows an example of information recorded in the management data area when the number of ECC blocks between linking sectors is arbitrarily changed.

The linking interval recorded in the management data area of FIG. 7 basically has substantially the same meaning as the linking interval of FIG. 6, and a linking interval between the recording start address and the recording end address. How many ECs in a sector
This is information that is expressed in hexadecimal notation whether it exists in every C block.

However, in the example of FIG. 7, since the number of ECC blocks between linking sectors is variable, “0”, “1” and “F” are stored in the management data area as in the example of FIG. "," F "," E "," C "," E "," B "
Various linking interval values such as “9”, “A”, “E”,... Are recorded. That is, in the example of FIG. 7, the linking intervals “F”, “E”, “C”, “E”, “B”
“9”, “A”, and “E” indicate that a linking sector exists in every ECC block corresponding to these hexadecimal values.

FIG. 7 shows an example in which each of the areas EA, EB, and EC obtained by dividing one disk has a different address relationship.
In the management data area in the case of FIG. 7, the EA area having the address relationship of FIG. 2 has a linking interval of “0”, and the EB area having the address relationship of FIG. 3 has a linking interval of “1”. In the ED area having the address relationship by the ECC block of "F" and "E"
Various linking interval values such as “C”, “E”, “B”, “9”, “A”, “E”,... Are recorded.

Also in the case of FIG. 7, when reproducing the optical disk 1 in which the linking interval, the start address and the end address are recorded in the management data area, the linking interval, the start address and the end address of the management data area are set. As for the reading and linking sectors, it is determined that the sectors are unnecessary, and the skip reproduction is performed. The linking interval is updated together with the recording start address and the recording end address each time data is recorded on the optical disc 1.

As shown in the example of FIG. 7, the number of ECC blocks between linking sectors is arbitrarily variable.
In particular, it is suitable when the storage amount fluctuates depending on the compression ratio, such as when the optical disk device records a moving image or the like at a variable transfer rate.

In the examples of FIGS. 5 to 7 described above, the linking sector position is defined by expressing the interval between the recording start address and the end address by the linking sector interval. It is also possible to map whether or not a linking sector is to be arranged for the ECC block, and record the mapping information in the management data area.

FIG. 8 shows an example of information recorded in the management data area when mapping is performed for each of the ECC blocks on the optical disc, whether or not linking sectors are arranged.

That is, as shown in FIG. 8A, the presence / absence of a linking sector (the presence / absence of linking) is represented by a binary value of 1 or 0. For example, address 3000 which is the ECC address of the start address has no linking sector. "0", 3
Address 001 is also "0" without a linking sector, ...
Mapping information that sets a linking sector at address 3007 and sets “1” is recorded in the management data area. According to FIG. 8A, one ECC block contains one ECC block.
It can be seen that two linking sectors are arranged, and when the whole is mapped, it becomes as shown in FIG. 8B in binary and hexadecimal.

In the case where the method as shown in FIG. 8 is adopted, for example, the capacity of 4.7 GB of the DVD-RW is set to 3
Assuming that each ECC block of 2 KB (kilobytes) is mapped, 18.4 KB is required to record the presence or absence of a linking position, and the capacity of one ECC block can represent all mapping information.

In the case of FIG. 8, the mapping information is rewritten at the time of recording, and at the time of reproduction, the mapping information recorded in the management data area is read. ) Can be easily checked, and skipping reproduction can be performed for linking sectors as unnecessary sectors.

The expression “linking” refers to the conventional M
In the case of D, etc., the expression such that continuous data is recorded at different track positions on the disk, and the data recorded at these physically different positions is read out while moving the head, thereby reproducing the data continuously. Although the linking is included in the embodiment of the present invention as a matter of course, particularly, the linking cited as an example in the embodiment of the present invention divides data to be continuously recorded on a spiral track or the like by dividing the data. In the case of recording intermittently, linking for connecting the intermittent data joints will be referred to.

Next, when a signal such as video or audio is compressed / expanded by the AV encoding / decoding section 6, a recording mode set when recording / reproducing a signal to / from the optical disk 1 is set. The compression / decompression rate in the encoding / decoding section 6, the recording / reproduction rate of the optical disk, and the write / read rate of the track buffer memory 7 will be described below.

In the present embodiment, for example, the input / output rate of the original image signal input to the terminal 11 or the reproduced image signal output is set to 10 Mbps.
In the case where the recording / reproduction rate is 10 Mbps, the compression / expansion rate in the AV encoding / decoding section 6 can take three rates of 8 Mbps, 4 Mbps, and 2 Mbps. A high-quality recording mode that uses 8 Mbps as the compression / expansion rate and enables recording / reproduction for 2 hours on the optical disk, and a recording / reproduction for 4 hours on the optical disk using 4 Mbps as the compression / expansion rate A fixed transfer rate between a slightly higher-quality mode (medium-quality recording mode) that enables recording and a normal-quality recording mode that enables recording / reproduction for 8 hours on an optical disk using 2 Mbps as the compression / expansion rate (CBR) or a variable transfer rate (VBR) image quality priority recording mode can be selected. Further, in the present embodiment, for example, it is possible to set the resolution of an image to be recorded, to set a high-speed scene such as a car race, for example, and to perform recording with priority on recording time, By making these settings, the recording time of the optical disk can be changed.

In the optical disk device of the present embodiment,
To select the recording mode with priority on image quality and the setting with priority on recording time,
The user operates a selection key provided on the key input unit 10,
Alternatively, it is performed by inputting control data for performing these selections and settings from the input terminal 12. The input information from the key input unit 10 or the control data from the input terminal 12 is sent to the system controller 9, and the system controller 9 recognizes the selection or setting contents, and controls each unit according to the recognition result. Control.

The AV encoder / decoder 6 is configured to perform MPEG compression / expansion decoding at a compression / expansion rate according to the selected recording mode and recording time setting. And the system controller 9
The compression encoding / decompression decoding process corresponding to the compression / decompression rate is performed by the control from. That is, when a user selects a recording mode or inputs a setting of a recording time from the key input unit 10 or the input terminal 12, the system controller 9 controls the AV encoding / decoding unit 6 according to the input contents. To set the compression / decompression rate in MPEG compression / decompression decoding.

At this time, the system controller 9
Depends on the recording mode selection and recording time setting,
It also manages the capacity of the 64-Mbit track buffer memory 7, controls writing / reading, and sets the writing / reading rate.

Further, when the system controller 9 continuously compresses and encodes data such as video and audio data in the AV encoding / decoding section 6 and records the data intermittently on the optical disk 1, as described above, for example, 16 ECC It is set so that a linking sector of one sector as a discard sector is provided every block. That is, for example, video data when the compression rate is 8 Mbps has a data amount of about 4 Mbits because one GOP (group of pictures) is about 0.5 seconds, and the one sector is 2K.
If it is B, 2 (KB) * 16 * 16 = 4.096
(M bits), which is almost equal to the data amount per 16 ECC blocks. In the present embodiment, data such as video, which is continuously compression-encoded by the AV encoding / decoding unit 6, is transmitted to the optical disc 1. 16 for intermittent recording
It is set so that a linking sector of one sector is provided for each ECC block.

Note that the ATAPI interface unit 1
Recording of video and audio data such as a moving image supplied via the interface 3 and recording of data such as still image information and a program file will be described later.

Hereinafter, in the optical disc apparatus according to the embodiment of the present invention, the recording mode and the recording mode in the case where the data such as the video continuously compressed and encoded by the AV encoding / decoding section 6 are intermittently recorded on the optical disc 1 will be described. The operation of the compression rate of the AV encoder / decoder 6, the capacity management of the track buffer memory 7, the write / read control, and the write / read rate will be described.

At the time of recording on the optical disc 1, when a user selects a recording mode or inputs a setting of a recording time from the key input unit 10 or the input terminal 12, the system controller 9 first transmits the signal through the signal processing unit 5. The remaining storage capacity of the track buffer memory 7 is checked, and a predetermined upper limit of the track buffer memory 7 is set according to the input information of the recording mode selection and the recording time, as shown in FIGS. The capacity (full: FULL) and the lower limit capacity (empty: EMPTY) are set. The details of FIGS. 9 to 11 will be described later.

Next, the system controller 9 controls the AV encoder / decoder 6 to perform a compression encoding process at a compression rate according to the selection of the recording mode and the input of the setting of the recording time. Is written in a predetermined recording unit and is temporarily written in the track buffer memory 7 at the same write rate as the compression rate. At the same time, the system controller 9 controls the servo unit 8 to move the optical head 3 on a desired track (sector) on the optical disc 1 on which recording is to be performed (kick state).
To At this time, the compression encoding process in the AV encoding / decoding unit 6 is continued, and the writing to the track buffer memory 7 is also continued.

By continuing writing to the track buffer memory 7 in this state, when the remaining storage capacity of the track buffer memory 7 reaches a predetermined upper limit capacity (full) value, the system controller 9 The data is read from the buffer memory 7 and sent to the signal processing unit 5. In this state, the writing from the track buffer memory 7 and the writing are continued at the same time. However, at this time, the reading rate from the track buffer memory 7 is the same as the recording rate on the optical disc 1. Since the recording rate of the optical disc 1 is higher than the maximum compression rate in the AV encoding / decoding section 6, when writing and reading are simultaneously performed in the track buffer memory 7, the data storage amount gradually decreases. Will go.

The signal processing section 5 adds an error correction code to the compressed and coded data read from the track buffer memory 7 at the same read rate as the recording rate of the optical disc 1, and further adds an address and a synchronization signal. Send to amplifier section 4. The signal from the amplifier unit 4 is further sent to the optical head 3. At this time, the standby state of the optical head 2 is released by the system controller 9, so that
A signal is recorded on the optical disc 1.

On the other hand, when the data storage amount of the track buffer memory 7 gradually decreases and the remaining storage capacity reaches the value of the lower limit capacity (empty), the system controller 9
By controlling the servo unit 8, the optical head 3 is on standby (kick state) on the next track (sector) to be recorded.
At the same time, the reading from the track buffer memory 7 is stopped, and the process waits until the remaining storage capacity of the track buffer memory 7 reaches the value of the upper limit capacity (full).

Thereafter, when the remaining storage capacity of the track buffer memory 7 recovers to the upper limit capacity, reading from the track buffer memory 7 is resumed, and the optical head 2 is released from the standby state.

By repeating the above operation, A
Intermittently recording data such as video, which is continuously compression-encoded by the V-encoding / decoding unit 6, on the optical disc 1 is performed.

Further, the system controller 9 controls the capacity of the track buffer memory 7 at the same time as the above, and at the same time, stores the sector address of the LPP block to be recorded and the address of the linking sector obtained from the linking mode, the linking interval and the like. The timing of adding an error correction code and adding an address and a synchronization signal in the signal processing unit 5 is managed based on the difference between the two or the address of the ringing sector obtained from the mapping information. That is, the system controller 9 performs timing management so as to complete various signal processing such as generation of an error correction code in an ECC block between linking sectors, and by repeating this, intermittent data such as video data. Recording is performed, and as described with reference to FIG.
Sector management is performed such that one linking sector is provided for each ECC block.

When the recording is completed, the system controller 9 records and maps the start address and the end address of the management data area of the optical disc 1 and the linking mode or the linking interval.

Hereinafter, with reference to FIGS. 9 to 11, the manner of managing the capacity of the track buffer memory 7, controlling the writing / reading, and controlling the writing / reading rate during recording on the optical disk 1 will be described in detail.

FIGS. 9 to 11 show the write / read control of the track buffer memory 7, the change of the write / read rate, and the change of the capacity when the optical disk 1 is recorded. FIG. 9 shows that the compression rate in the AV encoding / decoding section 6 is 2 Mbps (the track buffer memory 7).
FIG. 10 shows the case where the compression rate (write rate) is 4 Mbps, and FIG. 11 shows the case where the compression rate (write rate) is 4 Mbps.
Indicates a case where the compression rate (write rate) is 8 Mbps.

Also, in FIGS. 9 to 11, during period A in the figures, at the start of recording, writing of data to the track buffer memory 7 whose storage capacity is the initial value 0 is started, and a predetermined upper limit capacity ( (Full) until the data is written. In the period A, reading from the track buffer memory 7 and recording on the optical disk 1 are not performed, and the optical head 3 is in a standby state on a desired track (sector) on the optical disk 1. In period B in the figure, data reading from the track buffer memory 7 having a predetermined upper limit capacity (full) is started,
A period until data is read out to a predetermined lower limit capacity (empty) is shown. In the period B, reading from and writing to the track buffer memory 7 are performed at the same time, and recording on the optical disk 1 is also performed at the same time. The period C in the figure indicates a period from when data is written to the track buffer memory 7 having the lower limit capacity (empty) to when the data reaches the predetermined upper limit capacity (full). In the period C, reading from the track buffer memory 7 and recording on the optical disc 1 are not performed, and the optical head 3 is in a standby state on a desired track (sector) on the optical disc 1. The period D in the figure indicates a period in which data is read from the track buffer memory 7 and simultaneously written from the upper limit capacity (full) to the lower limit capacity (empty), as in the case of the B period. Done at the same time.

More specifically, in FIG. 9 showing the case where the compression rate (write rate) is 2 Mbps, in the period A, the track buffer memory 7
Data is written up to a predetermined upper limit capacity (full) at a write rate of Mbps.
No reading from the disk and recording on the optical disk 1 are performed, and the optical head 3 is in a standby state on a desired track (sector). In the period B, as described above, the recording rate on the optical disc 1 is set to 10 Mbps. Therefore, data is read from the track buffer memory 7 at the same reading rate of 10 Mbps as the recording rate. In this period B, writing to the track buffer memory 7 is continued at a write rate of 2 Mbps.
(bps) −2 (Mbps) = 8 (Mbps), and the data storage amount gradually decreases at a speed corresponding to the rate. In the period C after the remaining storage capacity of the track buffer memory 7 has decreased to the predetermined lower limit capacity (empty) by gradually reducing the data storage amount in the period B, as in the case of the period A, Only data is written to the track buffer memory 7 at a write rate of 2 Mbps up to a predetermined upper limit capacity, no recording is performed on the optical disk 1, and the optical head 3 is moved to a desired track (sector).
It becomes a standby state above. The period D is the same as the period B.

In FIG. 10 showing a case where the compression rate (write rate) is 4 Mbps, in period A, data is written to the track buffer memory 7 at a write rate of 4 Mbps up to a predetermined upper limit capacity. Reading from the memory 7 and recording on the optical disk 1 are not performed, and the optical head 3 is on standby on a desired track. In the period B, since the recording rate on the optical disc 1 is 10 Mbps, data is read from the track buffer memory 7 at the same reading rate of 10 Mbps as the recording rate. In the case of FIG. 10, during the period B, writing to the track buffer memory 7 is continued at a write rate of 4 Mbps.
(ps) −4 (Mbps) = 6 (Mbps), and the data storage amount gradually decreases at a speed corresponding to the rate. In the period C after the remaining storage capacity of the track buffer memory 7 has decreased to the predetermined lower limit capacity due to the gradual decrease in the data storage amount in the period B, as in the case of the period A, the track buffer memory 4 Mb for 7
Only data writing is performed up to a predetermined upper limit capacity at a writing rate of ps, no recording is performed on the optical disc 1, and the optical head 3 is in a standby state on a desired track (sector). The period D is the same as the period B.

In FIG. 11 showing a case where the compression rate (write rate) is 8 Mbps, in period A, data is written to the track buffer memory 7 at a write rate of 8 Mbps up to a predetermined upper limit capacity. Reading from the memory 7 and recording on the optical disk 1 are not performed, and the optical head 3 is on standby on a desired track. In the period B, since the recording rate on the optical disc 1 is 10 Mbps, data is read from the track buffer memory 7 at the same reading rate of 10 Mbps as the recording rate. In the case of FIG. 11, since writing to the track buffer memory 7 is continued at a write rate of 8 Mbps in the period B, 10 (Mb)
(ps) -8 (Mbps) = 2 (Mbps), and the data storage amount gradually decreases at a speed corresponding to the rate. In the period C after the remaining storage capacity of the track buffer memory 7 has decreased to the predetermined lower limit capacity due to the gradual decrease in the data storage amount in the period B, as in the case of the period A, the track buffer memory 8 Mb for 7
Only data writing is performed up to a predetermined upper limit capacity at a writing rate of ps, no recording is performed on the optical disc 1, and the optical head 3 is in a standby state on a desired track (sector). The period D is the same as the period B.

As described with reference to FIGS. 9 to 11,
According to the present embodiment, when data compressed and encoded by the AV encoding / decoding unit 6 is recorded on the optical disc 1,
The compression rate (write rate of the track buffer memory 7) in the encoding / decoding unit 6 is 2 Mbps, 4 Mbps with respect to 10 Mbps which is the recording rate on the optical disc 1.
Since s and 8 Mbps are set low, the standby state in the A period or the C period (the standby state for recording on the optical disk 1)
Thus, the continuous compression encoding process can be performed by absorbing the time in the standby state.

Next, in the optical disk device of the present embodiment, continuous data of video and audio such as moving images supplied through the ATAPI interface unit 13 (hereinafter, referred to as the following).
An operation in the case where data such as moving images are continuously recorded on the optical disc 1 will be described.

When data such as a moving image supplied through the ATAPI interface unit 13 is continuously recorded on the optical disk 1, the optical disk device of the present embodiment performs recording by the following method. . Note that the AT
The moving image data via the API may be MPEG-compressed.

The interface of the ATAPI has a parallel bus.
, Data such as moving images is input at a higher transfer rate than the recording rate on the optical disk. That is, the recording rate of the optical disc 1 is 10 Mbp.
s, which is higher than the maximum compression rate of 8 Mbps in the AV encoding / decoding unit 6 described above, but the transfer of data such as moving images supplied via the ATAPI interface unit 13 Generally, the transfer rate is higher than the recording rate.

For this reason, in the present embodiment, when recording data such as a moving image supplied through the ATAPI interface section 13, the recording data is continuously read from the track buffer memory 7, and , The data is continuously recorded on the optical disc 1, while the ATAPI interface 1
The data input from 3 performs intermittent control such as temporarily stopping or restarting according to the capacity of the track buffer memory 7.

Although not shown in the drawings, in the optical disk device of the present embodiment, a track for continuously recording data such as a moving image supplied through the ATAPI interface unit 13 on the optical disk 1 is used. Operations such as capacity management of the buffer memory 7, write / read control, and write / read rate will be described.

When data such as a moving image is continuously recorded on the optical disk 1 via the ATAPI interface section 13, the system controller 9 firstly sets the remaining storage capacity of the track buffer memory 7 via the signal processing section 5. Is set, and the values of the predetermined upper limit capacity (full: FULL) and the lower limit capacity (empty: EMPTY) of the track buffer memory 7 are set, respectively.

Next, the system controller 9 converts the data such as the moving image supplied from the interface
The data is temporarily written in the track buffer memory 7 at the same write rate as the transfer rate of the data. At the same time, the system controller 9 controls the servo unit 8 to put the optical head 3 in a standby state (kick state) on a desired track (sector) on the optical disc 1 on which recording is to be performed. At this time, data input from the interface unit 13 is continued, and writing to the track buffer memory 7 is also continued.

Next, the system controller 9 checks the remaining storage capacity after the start of writing to the track buffer memory 7 and exceeds a predetermined lower limit capacity (empty) value. Is started and sent to the signal processing unit 5. In this state, the writing from the track buffer memory 7 and the writing are continued at the same time. However, at this time, the reading rate from the track buffer memory 7 is
The recording rate is the same as the recording rate. Here, the reading rate of the track buffer memory 7 is
The write rate of the track buffer memory 7 is the same as the data transfer rate of the ATAPI, and the data transfer rate of the ATAPI is higher than the recording rate of the optical disc 1 (memory read rate). Therefore, even if writing and reading are simultaneously performed in the track buffer memory 7, the amount of accumulated data gradually increases.

The signal processing section 5 adds an error correction code to the data read from the track buffer memory 7 at the same reading rate as the recording rate of the optical disc 1, and further adds an address and a synchronization signal to the data. Send to The signal from the amplifier unit 4 is further sent to the optical head 3. At this time, when the standby state of the optical head 2 is canceled by the system controller 9, data such as a moving image via the ATAPI is recorded on the optical disc 1.

By continuing writing and reading to and from the track buffer memory 7 in this state, when the remaining storage capacity of the track buffer memory 7 reaches a predetermined upper limit capacity (full), the system controller 9
Sends a command for a request to temporarily stop data transfer to a computer or the like connected to the outside via the interface unit 13 to temporarily stop input of data such as a moving image from the computer or the like. At the same time, the system control 9 stops writing to the track buffer memory 7 and continues only reading. As a result, the data storage amount of the track buffer memory 7 gradually decreases.

On the other hand, when the data storage amount of the track buffer memory 7 gradually decreases and the remaining storage capacity reaches the value of the lower limit capacity (empty), the system controller 9
A command for a data transfer restart request is sent to a computer or the like connected to the outside via the interface unit 13 to restart the input of data such as a moving image from the computer or the like. At the same time, the system controller 9 restarts the writing of the data such as the moving image sent to the interface unit 13 to the track buffer memory 7.

Thereafter, when the remaining storage capacity of the track buffer memory 7 reaches the upper limit capacity, input of data such as moving images from a computer or the like is temporarily stopped again, and writing to the track buffer memory 7 is stopped. Stop.

By repeating the above operation, A
It is realized that data such as a moving image via the TAPI interface unit 13 is continuously recorded on the optical disc 1. As described above, when data such as a moving image and audio is recorded on the optical disc 1 via the ATAPI interface unit 13, continuous data recording is performed on the optical disc 1. No portion is generated, and therefore, it is not necessary to record the linking sector as a discard sector as described above. Therefore, as the linking mode, linking interval, mapping information, and the like recorded in the management data area, values indicating no linking sector (linking mode “0”, linking interval “0”, linking presence / absence “0”, etc.) are recorded. Will be.

When the recording is completed, the system controller 9 sets the start address and end address of the management data area of the optical disc 1 and the linking mode or linking interval (linking mode “0”, linking interval “0”). Perform recording, mapping, etc.

Next, in the optical disk device of the present embodiment, relatively small data (hereinafter, referred to as program file data) such as still image information and program files supplied via the ATAPI interface unit 13 is used. The operation in the case of recording intermittently on the optical disc 1 will be described.

When recording data such as a program file supplied through the ATAPI interface unit 13, the optical disk device of the present embodiment performs recording by the following method.

In this case, as in the case of recording data such as a moving image supplied via the ATAPI interface unit 13 described above, the interface unit 13 transmits the data at a transfer rate higher than the recording rate to the optical disk. Since the data such as the program files is input, when recording the data such as the program files on the optical disc 1, the recording data is continuously read from the track buffer memory 7, and However, data can be recorded continuously. In addition, data input from the ATAPI interface unit 13 can be controlled to pause or resume according to the capacity of the track buffer memory 7.

However, the data amount of the program file and the like supplied via the ATAPI interface unit 13 described above has a relatively small data amount, and hardly becomes continuous data. Therefore, when recording data such as the program file, it is desirable to set the linking mode, the linking interval, the mapping information, and the like to values that match the data amount. For example, the data amount of a program file or the like is 2
(KB) * 16 = 32 (KB), the linking mode, the linking interval, etc. are set to 1 ECC
The linking mode “1” indicating that one linking sector is arranged for a block, the linking interval “1”, and the like are set.

The system controller 9 in the case of this example
In the ECC block, timing management is performed so that various signal processing such as generation of an error correction code is completed in one ECC block, and by repeating this, data such as a program file is recorded and the data as described with reference to FIG. Arrangement and management of one linking sector are performed for every one ECC block, and when recording is completed, recording of the start address and end address and the linking mode or linking interval in the management data area of the optical disk 1 is performed. Perform mapping etc.

In addition to this example, there may be a case where continuous data such as video and audio such as a moving image is edited. In this case, for example, the arrangement of one linking sector and the management of the sector are performed every one ECC block. Execute.

Of course, even when recording or editing data such as a program file, the interval between linking sectors may be arbitrarily variable.

Next, in the optical disk device of the present embodiment, for example, when a signal is reproduced from the optical disk 1 on which data compressed by the AV encoding / decoding unit 6 is recorded.
Recording mode and decompression rate in the AV encoder / decoder 6;
The capacity management of the track buffer memory 7, the write / read control, the operation of the write / read rate, and the operation of the sector management will be described.

When reproducing a signal from the optical disk 1, first, the system controller 9 controls the servo unit 8 to move the optical head 3 to a predetermined track on the optical disk 1, and to start the data of the start sector from the predetermined track. Is read. The start sector includes control data including data of a management data area. The control data includes information regarding a recording mode at the time of recording,
That is, for example, information on the decompression rate (the same rate as the compression rate at the time of recording) in the AV encoding / decoding section 6, data such as the recording start address and end address, linking mode or linking interval, and mapping information are arranged.

The system controller 9 extracts data such as a recording start address and an end address, a linking mode or a linking interval, and mapping information from the control data, and obtains an LPP address and a data address based on the data such as the linking mode or the linking interval. Management of linking sectors due to differences in
It manages the address of the linking sector of the ECC block based on the mapping information, that is, manages the linking sector during reproduction.

Here, when the data compressed by the AV encoding / decoding unit 6 is recorded, for example, the linking mode, the linking interval, the mapping information, etc., on the optical disc 1, as described above, have a linking sector every 16 ECC blocks. This indicates that they are allocated (linking mode “2”, linking interval “F”, etc.). Therefore, in this case, the system controller 9
The LPP address is incremented by 257 sectors added by one sector to 256 sectors of the CC block,
Reproduction control is performed to repeat reproduction while skipping unnecessary linking sectors.

At the same time, when the system controller 9 receives the information of the decompression rate extracted from the control data, the system controller 9 checks the remaining storage capacity of the track buffer memory 7 via the signal processing unit 7, and checks the decompression rate. According to the value, as shown in FIGS. 12 to 14, a predetermined upper limit capacity (full: FUL) of the track buffer memory 7 is used.
L) and the lower limit capacity (empty: EMPTY). The details of FIGS. 12 to 14 will be described later.

The system controller 9 controls the servo section 8 to cause the optical head 3 to read a signal from a desired track on the optical disc 1 at the same reproduction rate as the recording rate at the time of recording. At the same time, the processing unit 5 corrects the error of the reproduction data and starts writing to the track buffer memory 7. At this time, the writing rate to the track buffer memory 7 is the same as the reproduction rate of the optical disk 1.

Next, after starting writing to the track buffer memory 7, the system controller 9 checks the remaining storage capacity, and when the remaining storage capacity exceeds a predetermined lower limit capacity (empty) value, the data from the track buffer memory 7 is read out. Is started and sent to the AV encoding / decoding unit 6. At this time, the read rate from the track buffer memory 7 is
The same rate as the decompression rate previously extracted from the control data is used. Also, system control 9
Causes writing to be continued simultaneously with reading from the track buffer memory 7. Here, the write rate of the track buffer memory 7 is the same as the reproduction rate from the optical disc 1, while the read rate of the track buffer memory 7 is the same as the decompression rate of the AV encoding / decoding unit 6. Since the reproduction rate of the optical disk 1 (write rate of the memory) is faster than the maximum decompression rate (read rate of the memory) in the AV encoding / decoding section 6, writing and reading are simultaneously performed in the track buffer memory 7. Even so, the data storage amount will gradually increase.

The AV encoder / decoder 6 decompresses and decodes the data read from the track buffer memory 7 at the decompression rate previously extracted from the control data, and further separates audio data and video data.
D / A conversion is performed and each is output.

In this state, the writing and reading to the track buffer memory 7 are continued, so that when the remaining storage capacity of the track buffer memory 7 reaches a predetermined upper limit capacity (full), the system controller 9
Controls the servo unit 8 to cause the optical head 3 to enter a standby state (kick state) on a track (sector) to be reproduced next. At the same time, the system control 9 stops writing to the track buffer memory 7,
Only reading is continued. As a result, the data storage amount of the track buffer memory 7 gradually decreases.

On the other hand, when the data storage amount of the track buffer memory 7 gradually decreases and the remaining storage capacity reaches the value of the lower limit capacity (empty), the system controller 9
By controlling the servo unit 8, the reproduction of the next track to be reproduced from the optical head 3 is started, and the writing of the data reproduced from the optical disc 1 to the track buffer memory 7 is resumed.

Thereafter, when the remaining storage capacity of the track buffer memory 7 reaches the upper limit capacity, the optical head 2 is set in a standby state, and writing to the track buffer memory 7 is stopped. By repeating the above operation, continuous reproduction is performed.

Hereinafter, with reference to FIGS. 12 to 14, the capacity management of the track buffer memory 7 and the writing / reading when reproducing a signal from the optical disk 1 on which the data compressed by the AV encoding / decoding section 6 is recorded. The control and the control of the write / read rate will be described in detail.

FIGS. 12 to 14 show the write / read control of the track buffer memory 7, the change of the write / read rate, and the change of the capacity during reproduction of the optical disk 1. FIG. FIG. 12 shows a case where the expansion rate in the AV encoding / decoding unit 6 is 2 Mbps (the reading rate of the track buffer memory 7 is 2 Mbps).
14 shows the case where the decompression rate (readout rate) is 4 Mbps, and FIG. 14 shows the case where the decompression rate (readout rate) is 8 Mbps.

Further, in FIGS. 12 to 14, a in FIG.
The period indicates a period from the start of data writing to the track buffer memory 7 whose storage capacity is the initial value 0 at the start of reproduction, until data is written to a predetermined lower limit capacity (empty). During the period a, no decompression decoding is performed in the AV encoding / decoding unit 6, and
Only the data reproduced from the optical disc 1 is written to the track buffer memory 7. A period b in the figure indicates a period from when the remaining storage capacity of the track buffer memory 7 reaches the lower limit capacity (empty) to when it reaches the upper limit capacity (full). Note that, during the period b, the reproduction data is simultaneously read and written into the track buffer memory 7, and the AV encoding / decoding unit 6 also starts decompression decoding. The period c in the figure indicates a period from when the remaining storage capacity reaches the upper limit capacity (full), the writing to the track buffer memory 7 is stopped, and data is read to the lower limit capacity (empty). . In the period c, the optical head 3 is in a standby state on a desired track (sector) on the optical disk 1 and only reading from the track buffer memory 7 is performed. In the period d in the figure, reading and writing of reproduction data to the track buffer memory 7 are performed simultaneously from the lower limit capacity (empty) to the upper limit capacity (full) in the same manner as the period b, and AV coding and decoding are performed. The decoding unit 6 also performs decompression decoding. Period e is the same as period c,
The period f is the same as the period d, and the period g is the same as the period c or e.

More specifically, in FIG. 12 showing the case where the decompression rate (readout rate) is 2 Mbps, in period a, data is reproduced from the optical disc 1 at a reproduction rate of 10 Mbps, and the track buffer memory 7
Is written at the same write rate of 10 Mbps. At this time, no data is read from the track buffer memory 7. In period b, data is reproduced from the optical disc 1 at a reproduction rate of 10 Mbps,
At the same time, data is written into the track buffer memory 7 at a write rate of 10 Mbps, and at the same time, reading of data from the track buffer memory 7 is started at the same read rate as the expansion rate of 2 Mbps in the AV encoding / decoding section 6. You. In the period b, reading is performed from the track buffer memory 7 at a read rate of 2 Mbps, but writing is continued at a write rate of 10 Mbps.
At a speed corresponding to a rate of 0 (Mbps) −2 (Mbps) = 8 (Mbps), the data accumulation amount gradually increases. On the other hand, during the period c, data reproduction from the optical disk 1 is stopped, the optical head 3 enters a standby state on a desired track (sector), and writing to the track buffer memory 7 also stops. Therefore, in period c,
The data storage amount gradually decreases at a read rate of 2 Mbps from the track buffer memory 7.
At this time, the AV encoding / decoding unit 6 continues the decompression decoding. The period d is the same as the period b, the period e is the same as the period c, the period f is the same as the period d, and the period g is the same as the period c or e.

In FIG. 13 showing a case where the decompression rate (readout rate) is 4 Mbps, in the period a, the optical disk 1
Will play data at a playback rate of 10Mbps,
Data is written to the track buffer memory 7 at a write rate of 10 Mbps, and no data is read from the track buffer memory 7. In period b,
Data is reproduced from the optical disc 1 at a reproduction rate of 10 Mbps, and the track buffer memory 7 is also reproduced at 10 Mbps.
At the same time as the data is written at the write rate, the data read from the track buffer memory 7 is started at the same read rate as the expansion rate of 4 Mbps in the AV encoding / decoding section 6. In the period b, reading is performed from the track buffer memory 7 at a read rate of 4 Mbps, but writing is continued at a write rate of 10 Mbps, so that 10 (Mbps) −4 (Mbps) is stored in the track buffer memory 7. ) = 6 (Mbp
At a speed corresponding to the rate of s), the data accumulation amount gradually increases. In the period c, data reproduction from the optical disk 1 is stopped, the optical head 3 enters a standby state on a desired track (sector), and writing to the track buffer memory 7 also stops. For this reason, in the period c, the data storage amount gradually decreases at the read rate of 4 Mbps from the track buffer memory 7. At this time, the AV encoding / decoding unit 6 continues the decompression decoding. Period d is the same as period b, and period e is c
The period, the period f is the same as the period d, and the period g is the same as the period c or e.

In FIG. 14 showing the case where the expansion rate (readout rate) is 4 Mbps, in period a, the optical disk 1
Will play data at a playback rate of 10Mbps,
Data is written to the track buffer memory 7 at a write rate of 10 Mbps, and no data is read from the track buffer memory 7. In period b,
Data is reproduced from the optical disc 1 at a reproduction rate of 10 Mbps, and the track buffer memory 7 is also reproduced at 10 Mbps.
At the same time as the data is written at the write rate, the data read from the track buffer memory 7 is started at the same read rate as the expansion rate of 8 Mbps in the AV encoding / decoding section 6. In this period b, reading is performed from the track buffer memory 7 at a read rate of 8 Mbps, but writing is continued at a write rate of 10 Mbps, so that 10 (Mbps) −8 (Mbps) is stored in the track buffer memory 7. ) = 2 (Mbp
At a speed corresponding to the rate of s), the data accumulation amount gradually increases. In the period c, data reproduction from the optical disk 1 is stopped, the optical head 3 enters a standby state on a desired track (sector), and writing to the track buffer memory 7 also stops. For this reason, in the period c, the data storage amount gradually decreases at the read rate of 8 Mbps from the track buffer memory 7. At this time, the AV encoding / decoding unit 6 continues the decompression decoding. Period d is the same as period b, and period e is c
The period, the period f is the same as the period d, and the period g is the same as the period c or e.

As described with reference to FIGS. 12 to 14, according to the present embodiment, the data that has been compressed and coded by the AV coding and decoding unit 6 is reproduced from the optical disc 1 and decompressed. If so, the decompression rate in the AV encoding / decoding unit 6 (the reading rate of the track buffer memory 7)
Are set to 2 Mbps, 4 Mbps, and 8 Mbps, which are lower than 10 Mbps, which is the reproduction rate for the optical disk 1, and therefore, the standby state (period for reproduction from the optical disk 1) in the c period or the e and g periods is set. Continuous playback can be performed by absorbing the time in the standby state.

The compressed data reproduced from the optical disk 1 or the data decompressed by the AV encoder / decoder 6 can be transferred to an external computer or the like via the ATAPI interface 13. .

Next, although not shown, in the optical disk device of the present embodiment, a signal is reproduced from the optical disk 1 on which data such as a moving image is recorded via the ATAPI.
When the data is transferred to an external computer or the like via the ATAPI interface unit 13, the capacity management of the track buffer memory 7, the write / read control, and the write / read
The operation of the read rate and the operation of the sector management will be described.

First, the system controller 9 extracts data such as a recording start address and an ending address, a linking mode or a linking interval and mapping information from the control data, and obtains the recording start address and the ending address, and the linking mode or the linking interval. , LP based on data such as mapping information
The linking sector is managed based on the difference between the P address and the data address, the linking sector address of each ECC block is managed, and the sector management during reproduction is performed accordingly.

Here, when data such as a moving image via the ATAPI is recorded on the optical disc 1, for example, the linking mode, the linking interval, and the mapping information indicate that there is no linking sector on the optical disc 1 as described above. (Linking mode “0”, linking interval “0”, linking presence / absence “0”). Therefore, in this case, the system controller 9 performs reproduction control so that all data sectors are reproduced in the same manner according to the LPP address.

At the same time, the system controller 9 checks the remaining storage capacity of the track buffer memory 7 via the signal processing unit 7, and determines a predetermined upper limit capacity (full: FULL) and a lower limit capacity (full: FULL) of the track buffer memory 7. (Empty) is set.

The system controller 9 controls the servo section 8 to cause the optical head 3 to read a signal from a desired track on the optical disk 1 at the same reproduction rate as the recording rate at the time of recording. At the same time, the processing unit 5 corrects the error of the reproduction data and starts writing to the track buffer memory 7. At this time, the writing rate to the track buffer memory 7 is the same as the reproduction rate of the optical disk 1.

Next, after starting writing to the track buffer memory 7, the system controller 9 checks the remaining storage capacity, and when it reaches a predetermined upper limit capacity (full) value, the data from the track buffer memory 7 is read. And sends it to the interface unit 13. At this time, the reading rate from the track buffer memory 7 is A
The data transfer rate is the same as the data transfer rate in TAPI. Further, the system control 9 causes the track buffer memory 7 to continue writing as well as reading. Here, the write rate of the track buffer memory 7 is the same as the reproduction rate from the optical disc 1,
On the other hand, the read rate of the track buffer memory 7 is ATA
The data transfer rate is the same as the PI data transfer rate, and the reproduction rate (memory write rate) of the optical disc 1 is ATAP.
Since the data transfer rate is lower than the data transfer rate of I, even if writing and reading are simultaneously performed in the track buffer memory 7, the data storage amount gradually decreases.

By continuing writing and reading to and from the track buffer memory 7 in this state, when the remaining storage capacity of the track buffer memory 7 reaches a predetermined lower limit capacity (empty) value, the system controller 9 Sends a command to suspend data transfer to an external computer or the like via the interface unit 13. At this time, the system control 9 continues the reproduction of the optical disk 1 and the writing to the track buffer memory 7, while stopping the reading of the track buffer memory 7. As a result, the data storage amount of the track buffer memory 7 gradually increases.

As described above, when the remaining storage capacity reaches the value of the upper limit capacity (full) by gradually increasing the data storage amount of the track buffer memory 7, the system controller 9 sets the interface section 13 to A data transfer restart command is sent to an external computer or the like via the controller, and at the same time, reading of the track buffer memory 7 is restarted.

After that, when the remaining storage capacity of the track buffer memory 7 reaches the lower limit capacity, the reading of the track buffer memory 7 is stopped again. By repeating the above-described operation, continuous reproduction from the optical disc 1 and intermittent data transfer via ATAPI are performed.

When the data such as a moving image reproduced from the optical disc 1 is MPEG compressed data, the MPEG compressed data can be sent to the AV encoding / decoding section 6 and decompressed. .

Next, although not shown, in the optical disk device of the present embodiment, a signal is reproduced from the optical disk 1 on which data such as a program file or edited data is recorded via the ATAPI, and the ATAPI is used. When the data is transferred to an external computer or the like via the interface unit 13, the capacity management of the track buffer memory 7, the write / read control, and the operation of the write / read rate,
The operation of the sector management will be described.

In this case, the capacity management of the track buffer memory 7, the write / read control, and the write / read rate operation are performed in the same manner as when the optical disk 1 on which data such as a moving image is recorded via the ATAPI is reproduced. Although the operation is substantially the same, data such as linking mode or linking interval and mapping information extracted from the control data is, for example, 1 ECC as described above.
This indicates that one linking sector is assigned to each block (linking mode “1”, linking interval “1”, etc.).

Therefore, at this time, the system controller 9 performs the reproduction control of repeating the reproduction while skipping unnecessary linking sectors by incrementing the LPP address by 17 sectors obtained by adding one sector to 16 sectors of one ECC block.

In the above embodiment, for example, three areas EA, EB, EC
The optical disk having the above-described configuration is described as an example. However, one optical disk has, for example, only one of the EC areas, a combination of any two of the EA, EB, and EC areas. Is an EA or EB area and the data area is either or both of the EB and EC areas, an optical disc has two or more recording areas, and a plurality of It is also possible to use the device properly in a device having such a disk.

In the present embodiment, the description has been given of a rotary disk optical disk. However, the present invention is not limited to this, and may be a card type or the like, and is not limited to the above example.

Further, in the example of FIG. 1 described above, only the basic configuration of the optical disk device is described. However, the optical disk device of the embodiment of the present invention may be a video camera using an optical disk as a recording medium, a portable or stationary type. It can be applied to various uses such as an optical disk device.

In addition, in this embodiment, the storage capacity of the track buffer memory 7 is set to 64 Mbits.
For example, a D-RAM having a storage capacity of 256 Mbits can be used.

The configuration in the case where the optical disk device of the present embodiment is applied to a video camera is as shown in FIG. 15, for example. Among the components in FIG. 15, FIG.
The same components as those described above are denoted by the same reference symbols, and description thereof is omitted.

That is, when the optical disk device according to the present embodiment is applied to a video camera, as shown in FIG.
The AV encoding / decoding unit 6 includes a D / A converter 14 for converting audio data into an analog signal, a speaker 15 for outputting audio, an NTSC encoder 16 for converting expanded and decoded video data into, for example, the NTSC format, , A CCD (solid-state imaging device) 19 that converts an image via an optical system (not shown) into an electric signal,
A decoder 18 for converting an electric signal (imaging signal) from the CCD 19 into video data, a microphone 21 for capturing ambient sounds during shooting, an A / D converter 20 for digitally converting an audio signal captured by the microphone 21, and the like. Will be connected. In this example, the key input unit 10 is a power on / off device normally provided in a video camera.
In addition to an off switch, a recording start button, a play button, a stop button, and the like, a zoom operation button for operating an optical zoom lens and the like are provided.

As apparent from the above description, according to the embodiment of the present invention, the data areas are respectively set according to the type and method of the data to be recorded and the specifications of the device to be recorded.
It can be used at the maximum usage efficiency, and there is no error in reproduced data during reproduction. When addressing continuous data such as ordinary moving images, the address management is also performed in a linking unit according to the amount of data actually recorded and reproduced on the disk. Therefore, the linking management is performed once every 16 ECC blocks, for example. In the case of short data such as a program file, the linking can be configured in a small unit in accordance with the unit of recording and reproduction, and can be minimized to the maximum.

Further, for example, 16
If one linking sector is allocated for each ECC block, the data area of the DVD-RW disc is 4.7 * 256/257 = 4.68 (GB).

In the present embodiment, one in 16 sectors is used.
Although the ECC block is used, the capacity of the track buffer memory 7 for temporarily storing compressed signals of images and audio signals,
In order to intermittently record the data amount in a GOP or the like, which is a compression unit in D or the like, on a disk, 2 Mbits, 4 Mbits or more can be made into one ECC block. This unit can be changed as appropriate according to the capacity of the track buffer memory 7 of the apparatus, which is the specification of the apparatus, the type of data to be recorded, or the area of the disk.

The present invention is not limited to the above-described embodiment, and is not limited to, for example, a DVD, but may be an MO (magneto optic).
al) It may be applied to discs and MDs. In addition, compression /
The signal recorded / reproduced by changing the expansion rate is not limited to the image signal, but may be an audio signal or the like. Furthermore, in the above description of the embodiment, the rotation control of the optical disc 1 is a constant linear velocity (CLV) control.
Constant angular velocity (CAV) control or so-called zone CAV
In control or the like, for example, the area from the inner circumference to the outer circumference of the optical disc is divided into a plurality (for example, about 30 areas) for each radius,
The linear velocity may be controlled to be constant in each divided area while managing the track address by the system controller. As a matter of course, various changes can be made according to the design and the like within a range not departing from the technical idea according to the present invention.

[0192]

According to the recording medium of the present invention, a plurality of sectors form one block, and the number of blocks is varied according to the recording condition of the information signal. The recording medium can be used with the maximum use efficiency by providing a linking sector after the, and management of processing units such as error correction at the time of recording or reproduction is easy, and Data errors can be prevented from occurring.

The recording medium according to the second aspect of the present invention is characterized in that the recording conditions include at least one continuous information signal.
There are a mode of recording in a block, a mode of intermittent recording for each block, and a mode of intermittent recording in a plurality of blocks. By using any of the above recording modes or a combination thereof, the recording medium can be effectively used. is there.

The recording medium according to the third aspect of the present invention is provided with a linking management area for recording information for managing a linking sector. In the linking management area, information on a variable number of blocks is stored in the linking sector. Is recorded as information for managing the data, it is easy to manage processing units such as error correction at the time of reproduction, and it is also possible to prevent occurrence of data errors at the time of reproduction.

A recording medium according to a fourth aspect of the present invention is provided with a linking management area for recording information for managing a linking sector, and the linking management area contains a linking sector correspondence table for each block. Since the information is recorded as information for managing the linking sector, it is easy to manage processing units such as error correction during reproduction, and it is also possible to prevent occurrence of a data error during reproduction.

According to a fifth aspect of the present invention, there is provided a recording method, wherein one block is formed by information signals corresponding to a plurality of sectors of a recording medium, and a predetermined signal processing is performed on one block of the information signal. And recording with a variable number of blocks according to the recording condition of the information signal, and recording by providing a linking sector after the variable number of blocks with unity, thereby maximizing the use efficiency of the recording medium. In addition, it is easy to manage processing units such as error correction at the time of recording and later reproduction, and it is also possible to prevent occurrence of a data error at the time of later reproduction.

According to a sixth aspect of the present invention, there is provided a recording apparatus, comprising: a block forming means for forming one block by information signals corresponding to a plurality of sectors of a recording medium; and a predetermined signal processing for one block of the information signal. A recording medium comprising: a signal processing unit for performing the recording; and a recording unit for recording while varying the number of blocks in accordance with the recording condition of the information signal, and recording by providing a linking sector after the variable number of blocks in unity. Can be used with the maximum use efficiency, and it is easy to manage processing units such as error correction at the time of recording and later reproduction, and it is also possible to prevent occurrence of a data error at the time of later reproduction. is there.

According to a seventh aspect of the present invention, there is provided a recording method comprising: reproducing one block of an information signal including a plurality of sectors from a recording medium; and performing a predetermined signal processing on the one block of the information signal. And performing a reproduction control for skipping a linking sector provided after the number of blocks changed according to the recording condition of the information signal, so that the recording medium can be used with maximum use efficiency. In addition, it is easy to manage processing units such as error correction during reproduction, and it is also possible to prevent occurrence of data errors during reproduction.

According to the present invention, there is provided a recording apparatus for reproducing, from a recording medium, one block of an information signal comprising a plurality of sectors, and a signal for subjecting the one block of the information signal to predetermined signal processing. Processing means, and reproduction control means for performing reproduction control for skipping a linking sector provided after the number of blocks varied according to the recording condition of the information signal, so that the recording medium can be used with maximum use efficiency. In addition, management of processing units such as error correction at the time of reproduction is easy, and occurrence of a data error at the time of reproduction can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship between an LPP address and a data address when data is continuously recorded in a data area of an optical disc.

FIG. 3 is a diagram illustrating a relationship between an LPP address and a data address when data is intermittently recorded in a data area of an optical disk for every 16 sectors of one ECC block.

FIG. 4 is a diagram illustrating a relationship between an LPP address and a data address in a case where data is intermittently recorded every 256 sectors of a 16 ECC block in a data area of an optical disc.

FIG. 5 is a diagram illustrating an example of a case where linking mode information is recorded as an example of information recorded in a management data area of an optical disc.

FIG. 6 is a diagram illustrating an example in which information of a linking interval is recorded as an example of information recorded in a management data area of an optical disc.

FIG. 7 is a diagram showing an example in which information of a variable linking interval is recorded as a linking interval, which is an example of information recorded in a management data area of an optical disc.

FIG. 8 is a diagram showing an example of information recorded in a management data area when mapping whether or not linking sectors are arranged for all ECC blocks of an optical disc;

FIG. 9 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data MPEG-compressed at 2 Mbps to / from a track buffer memory during recording.

FIG. 10 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data that has been MPEG-compressed at 4 Mbps to a track buffer memory during recording.

FIG. 11 is a conceptual diagram conceptually showing buffer control when writing / reading data compressed at 8 Mbps to a track buffer memory during recording.

FIG. 12 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data that has been MPEG-compressed at 2 Mbps to a track buffer memory during reproduction.

FIG. 13 is a conceptual diagram conceptually showing buffer control when writing / reading data compressed at 4 Mbps to a track buffer memory during playback.

FIG. 14 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data compressed by MPEG at 8 Mbps to / from a track buffer memory during reproduction.

FIG. 15 is a block diagram showing a schematic configuration in a case where the optical disc device according to the embodiment of the present invention is applied to a video camera.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Spindle motor, 3 ... Optical head, 4 ... Amplifier part, 5 ... Signal processing part, 6 ... AV encoding / decoding part, 7 ... Track buffer memory, 8 ... 16 Mbit D-RAM, 9 ... System controller, 10 ... key input unit, 11 ... input and output terminals for audio and video signals,
12: control data input terminal, 13: ATAPI interface

Continued on the front page F term (reference) 5C052 AA02 AA03 AA04 AA17 AB06 AB09 AC01 BC05 CC11 CC12 DD04 DD07 5D044 AB05 AB07 BC06 CC04 DE03 DE22 DE37 DE48 DE52 EF02 FG09 GK08 GK11 JJ01

Claims (8)

[Claims] 1. A method according to claim 1, wherein one block is formed by a plurality of sectors, the number of blocks is varied according to a recording condition of an information signal, and a linking sector is provided after the variable number of blocks in a unity. Recording medium. 2. The recording condition includes at least a mode for continuously recording an information signal, a mode for intermittent recording for each block, and a mode for intermittent recording for a plurality of blocks. 2. The recording medium according to claim 1, wherein one of the recording modes or a combination thereof is used. 3. A linking management area for recording information for managing the linking sector, wherein the information on the variable number of blocks is recorded as information for managing the linking sector. The recording medium according to claim 1 or 2, wherein 4. A linking management area for recording information for managing the linking sector, wherein a linking sector correspondence table for each block is recorded as information for managing the linking sector in the linking management area. The recording medium according to claim 1, wherein: 5. A step of forming one block with information signals corresponding to a plurality of sectors of a recording medium; a step of performing a predetermined signal processing on the information signal of the one block; A recording method comprising: a step of recording with a variable number of blocks; and a step of recording by providing a linking sector after the variable number of blocks which are united. 6. A block forming means for forming one block with information signals corresponding to a plurality of sectors of a recording medium, a signal processing means for performing predetermined signal processing on the information signal of the one block, and a recording condition of the information signal. Recording means for recording while varying the number of blocks in accordance with the number of blocks, and recording by providing a linking sector after the variable number of blocks in unity. 7. A step of reproducing an information signal of one block including a plurality of sectors from a recording medium; a step of performing predetermined signal processing on the information signal of the one block; and changing the information signal according to a recording condition of the information signal. Performing a reproduction control for skipping a linking sector provided after the number of blocks. 8. A reproducing means for reproducing an information signal of one block composed of a plurality of sectors from a recording medium, a signal processing means for performing predetermined signal processing on the information signal of one block, and according to a recording condition of the information signal. A reproduction control means for performing reproduction control for skipping a linking sector provided after the variable number of blocks.