JP2000187965A - Recording medium, recording method and device, reproducing method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable stable reproduction by preventing occurrence of a data error at the time of reproduction. SOLUTION: For example, 1 ECC(error correction code) block is formed with 16 sectors, when data of video and the like MPEG-compressed are recorded intermittently in an optical disk, an ECC block address indicating a ringing position generated at interval in accordance with character of a recording signal or specification of a device, a link existence flag indicating whether a ringing position exists in each ECC block or not, and a ringing bit map having a start address and a finish address for information of a ringing position are recorded in an optical disk. Also at the same time, a valid/invalid flag indicating whether a ringing bit map is valid or invalid is recorded.

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 As a recording / reproducing apparatus for recording / reproducing a compressed signal on an optical disc at high speed and high density, a so-called DVD-RAM apparatus, CD-RW apparatus, M
D (mini-disc) devices and the like exist.

[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, in this case, by providing a linking sector, a portion for switching between recording and recording can be connected. However, since the data is partially destroyed in the linking sector portion in the ECC block, the data error also occurs. Is likely to occur.

Furthermore, even if the occurrence of data errors can be reduced, it is necessary to avoid incompatibility with existing read-only devices such as DVD video, and the occurrence of data errors must be avoided. In order to prevent this, it is also necessary to avoid consuming a large amount of recording area.

In addition, not only in the case where data is recorded intermittently, but also in the case where, for example, recording is performed a plurality of times on all areas of an optical disc, the recording start position is always the same. If the recording start position is always the same as described above, for example, in the case of an optical disc having a limited number of recordable times such as a phase-change type DVD-RAM, recording is repeated at the recording start position, and as a result, the reproduction signal The characteristics such as jitters are greatly deteriorated, and eventually the reproduced signal cannot be read.

[0021] The present invention has been made in view of the above-mentioned problems, and can prevent a data error during reproduction, enable stable reproduction, and have compatibility with already existing equipment. Further, a recording medium, a recording method and an apparatus, and a reproducing method and an apparatus, which can reduce the consumption of the recording area of the recording medium, extend the life of the recording medium, and improve the reliability of data. For the purpose of providing.

[0022]

In order to solve the above-mentioned problems, a recording medium according to the present invention, when recording one piece of information using a plurality of blocks, divides this one piece of information into a plurality of pieces. A linking management area in which linking management information for managing linking position information indicating a position to be divided and recorded is provided, and a control management area in which control information for managing start position information of at least one piece of information is provided. It becomes.

According to the recording method of the present invention, in order to solve the above-mentioned problem, when recording one piece of information using a plurality of blocks, the one piece of information is divided into a plurality of pieces and recorded. Generating linking management information for managing linking position information indicating a position to perform, generating control information for managing start position information of at least one piece of information, and recording the linking management information and the control information Recording in a predetermined area of the medium.

Further, in order to solve the above-mentioned problems, the recording apparatus according to the present invention divides this one piece of information into a plurality of pieces when recording one piece of information using a plurality of blocks. Linking management information generating means for generating linking management information for managing linking position information indicating a position to be performed, control information generating means for generating control information for managing start position information of at least one piece of information, and the linking management information And recording means for recording the control information in a predetermined area of a recording medium.

Further, in order to solve the above-mentioned problem, the reproducing method according to the present invention provides the starting position information of one piece of information from a predetermined area of a recording medium on which one piece of information is recorded using a plurality of blocks. Reproducing control information to be managed;
From a predetermined area of the recording medium, reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces, and the reproduced linking management information and the control information; Based on
Reproducing the one piece of information.

Further, in order to solve the above-mentioned problem, the reproducing apparatus according to the present invention uses a plurality of blocks to start information of the one piece of information from a predetermined area of a recording medium on which the one piece of information is recorded. Control information reproducing means for reproducing control information for managing linking information, and linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded from a predetermined area of the recording medium. Linking management information reproducing means, and reproducing means for reproducing the one piece of information based on the reproduced linking management information and the control information.

According to another aspect of the present invention, there is provided a recording method, comprising the steps of: setting a recording mode for determining a storage amount for recording one piece of information within a predetermined time region; Reading the address pre-recorded on the medium, and performing linking to divide the one piece of information into a plurality of pieces, from the recording start address to the recording end address of the one piece of information, according to the recording mode. Recording the one information; and recording control information for managing linking position information indicating a position of the linking and start position information of the one information.

In order to solve the above-mentioned problems, the reproducing method according to the present invention includes a step of reading a start position address of one piece of information recorded on a recording medium, and dividing the position information into a plurality of pieces of information. Reproducing a linking recording address corresponding to linking position information indicating the position of the linking recorded in the step (a), and, from the start position address to an end position address of the one information, the linking recording address recorded using the linking recording address. Reproducing one piece of information.

According to the recording medium of the present invention, when one piece of information is recorded by using a plurality of blocks, the one piece of information is divided into a plurality of pieces to record. A linking management area in which linking management information for managing linking position information indicating the linking management information is recorded, and a flag management area for managing flag information indicating validity / invalidity of the linking management information in the linking management area.

According to the recording method of the present invention, in order to solve the above-described problem, when one piece of information is recorded using a plurality of blocks, a position where the one piece of information is divided into a plurality of pieces and recorded. Generating linking management information for managing linking position information indicating the linking information; generating flag information indicating validity / invalidity of the linking management information; and determining the linking management information and the flag information on a recording medium. Recording in the area.

Further, in order to solve the above-mentioned problems, the recording apparatus according to the present invention, when recording one piece of information using a plurality of blocks, positions where the one piece of information is divided into a plurality of pieces and recorded. Linking management information generating means for generating linking management information for managing linking position information indicating flag information, flag information generating means for generating flag information indicating validity / invalidity of the linking management information, the linking management information and the flag information And recording means for recording the information in a predetermined area of the recording medium.

In order to solve the above-mentioned problems, the reproducing method according to the present invention uses the starting position information of the one piece of information from a predetermined area of a recording medium on which one piece of information is recorded using a plurality of blocks. Reproducing control information to manage linking information from a predetermined area of the recording medium, and linking management information to manage linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded. A step of reproducing flag information indicating validity / invalidity of the linking management from a predetermined area of the recording medium; and a step of reproducing the one piece of information when the flag information indicates validity.

Further, in order to solve the above-mentioned problem, the reproducing apparatus according to the present invention uses a plurality of blocks to record start information of the one piece of information from a predetermined area of a recording medium on which one piece of information is recorded. Control information reproducing means for reproducing control information for managing linking information, and linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded from a predetermined area of the recording medium. Linking management information reproducing means; flag information reproducing means for reproducing flag information indicating validity / invalidity of the linking management from a predetermined area of the recording medium; and when the flag information indicates validity, the one information is reproduced. Reproduction means for reproducing.

In order to solve the above-mentioned problems, the recording method according to the present invention comprises the steps of: setting a recording mode for determining a storage amount for recording one piece of information within a predetermined time area; Reading the address pre-recorded on the medium, and performing linking to divide the one piece of information into a plurality of pieces, from the recording start address to the recording end address of the one piece of information, according to the recording mode. Recording the one information; recording linking position information indicating the linking position; and flag information indicating validity / invalidity of the linking position information.

According to another aspect of the present invention, there is provided a reproducing method for linking recording corresponding to linking position information indicating a position where one piece of information is divided into a plurality of pieces by using a plurality of blocks and recorded. Reproducing an address; reproducing flag information indicating validity / invalidity of the linking position information; and when the flag information indicates validity, from the recording start address to the recording end address of the one piece of information, Reproducing the one piece of information using a linking recording address.

In order to solve the above-mentioned problems, the recording method according to the present invention is directed to a method of generating linking position information indicating a position where one piece of information is divided into a plurality of pieces by using a plurality of blocks and recorded. Generating the new linking position information by shifting the previous linking position by a predetermined amount from the new linking position information; and recording the new linking position information in a predetermined area of a recording medium.

In order to solve the above-mentioned problem, the recording apparatus according to the present invention is directed to a method of generating linking position information indicating a position where one piece of information is divided into a plurality of pieces and recorded using a plurality of blocks. Linking position information shifting means for generating the new linking position information shifted by a predetermined amount from the previously recorded linking position information so that the previous linking position does not overlap with the new linking position; and Recording means for recording information in a predetermined area of the recording medium.

According to the reproducing method of the present invention, when one piece of information is recorded using a plurality of blocks, the position where the one piece of information is divided into a plurality of pieces is recorded. Reproducing a linking recording address corresponding to linking position information indicating: a step of reproducing the one information from a recording medium; an error of the one information reproduced from a block in which the linking recording address exists; Comparing the one piece of information reproduced from a block having no linking recording address with an error over a plurality of blocks; and, based on the result of the comparison, determining the correlation between the linking position information and the occurrence of the error. Determining.

Further, in order to solve the above-mentioned problem, the recording apparatus according to the present invention, when recording one piece of information using a plurality of blocks, divides the one piece of information into a plurality of pieces and records the information. Linking recording address reproducing means for reproducing a linking recording address corresponding to linking position information, reproducing means for reproducing the one piece of information from a recording medium, and error detecting means for detecting an error from the reproduced one piece of information. Comparing means for comparing the error of the one information reproduced from the block where the linking recording address exists and the error of the one information reproduced from the block where the linking recording address does not exist over a plurality of blocks. And determining means for determining a correlation between the linking position information and the occurrence of an error based on a result of the comparison.

[0040]

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 (ECC block). The details of the ECC block will be described later. 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 rotation position signal detecting means 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 disc 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 is 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, when the resolution of an image to be recorded or a high-speed scene such as a car race is selected, or when control data for setting with priority on the recording time is input from the key input unit 10 or the input terminal 12. The system controller 9 recognizes the control data, changes the recording time based on the recognition result, and allows an external user to select the setting.

Here, for example, when a signal is reproduced from the optical disc 1, a reproduction start command is issued from the key input unit 10, and the system controller 9 at this time 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 section 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, a tracking and focusing servo signal (tracking signal) from the RF signal. Error and focus error signals). The amplifier unit 4 further includes an equalizer that optimizes at least the frequency characteristics of the reproduction signal, a PLL (phase lock loop) circuit that extracts a bit clock from the reproduction signal and generates a speed servo signal, and a A jitter generator for extracting a jitter component from a comparison between the bit clock and the time axis of the reproduced signal.
The jitter value generated by the amplifier unit 4 is sent to the system controller 9, the tracking and focusing servo signal and the speed servo signal are sent to the servo unit 8, and the reproduction signal is sent to the signal processing unit 5.

The servo section 8 receives the velocity servo signal from the amplifier section 4 and the focusing and tracking servo signals of the optical head 3, and also 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 based on each servo control signal from the servo unit 8. The driver 7 drives the spindle motor 2 to rotate in accordance with the rotation speed servo control signal from the servo unit 8, and 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.

When the optical disk 1 is reproduced, the signal processing unit 5
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 reproduced 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 recording a signal 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. 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 also 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 disk 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 out from the track buffer memory 7 is subjected to a predetermined modulation process in the signal processing unit 5, sent to the amplifier unit 3 as a recording signal, and sent to the optical head 3 in the target sector ( Track).

At this time, the system controller 9
A / D (analog / digital) converts and measures the jitter value from the amplifier unit 4, and changes the waveform correction amount in the amplifier unit 4 during recording according to the measured jitter value and 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 disc 1 of the present embodiment is a DVD-RW disc that is compatible with DVD video, DVD audio, DVD-ROM, etc., and conforms to the DVD standard. In addition to the DVD-RW, a write-once or rewritable optical disk usually has sector addresses recorded or formed in advance on the disk in order to enable address control during recording. However, in the conventional optical disc, the address recording is performed by wobbling the groove according to the frequency modulated based on the address data, but in the case of the DVD-RW of the present embodiment, the address recording is more performed. In order to enable high-speed and high-density recording, a so-called LPP (land pre-pit) address method for forming a predetermined pit on a land portion on an optical disk is employed together with the wobbling frequency signal of the groove.

Here, when data is actually recorded on an 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.
Generally, 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. As an example of data recording in which the LPP address and the data address match in this way, 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, and therefore, the relationship between the LPP address and the data address can be made to match.

Next, the ECC block handled in the embodiment of the present invention will be described below.

In the present embodiment, as shown in FIG. 2, one consecutive sector (32 KB) of the data area is used.
An ECC block is formed, and this ECC block is a minimum basic unit at the time of recording or reproduction. Each data sector is composed of 26 sync frames. Further, in the DVD-RW, sector addresses are formed at predetermined intervals.

Here, as in the case of intermittent recording described later using the track buffer memory 7, for example, when continuous data is newly recorded after the previously recorded area (data area), the data before that is recorded. Data at the joint between recording and post-recording is discontinuous. Therefore, in order to minimize the influence of the data discontinuity, as shown in FIG. 2, for example, the joint position is set at the 82nd to 86th bytes of the second sync frame of the first sector (physical sector) of the ECC block. To come. That is, the position of the joint is a linking position for performing linking. The second sync frame in which the linking position exists is a linking frame, and the leading sector including the linking frame is a linking sector.

When the continuous data recording becomes discontinuous as described above, in order to avoid the influence of the discontinuous portion,
Ringing is performed at that position. As the ringing method, for example, the following method can be considered.

For example, a method of crushing one sector including a linking position as shown in FIG. 3, a method of crushing one ECC block including a linking position as shown in FIG. 4, and a method of crushing one ECC block as shown in FIG. Basically, a method of not losing data including the linking position can be considered.

That is, in the method of FIG. 3, the data area of the first sector which is the linking position in the ECC block is not used for recording. Further, in the method of FIG. 4, the data area of all sectors (16 sectors) of the ECC block including the linking position is not used for recording. However, these methods have a large loss in terms of data recording capacity, and particularly in the example of FIG. 4, the loss of data recording capacity is extremely large.

On the other hand, in the method of FIG. 5, for example, when the ECC block 1 is continuous data with respect to the ECC block 0 and the ringing position exists in the second sync frame SY2 of the ECC block 1, In order to prevent loss of the data at the ringing position, a part of the data recorded before the second sync frame SY2 is overlapped and overwritten as continuous data. According to the method of FIG. 5, data connection with no data loss becomes possible as compared with the methods of FIGS. In the method shown in FIG. 5, the correction additional data of the ECC block 1 is generated in advance by using the track buffer memory 7, and then the ECC block 0 is generated.
Then, the first and second sync frames SY1 and SY2 of the ECC block 1 are recorded, and thereafter, the remaining data is overwritten. When the method shown in FIG. 5 is realized, it is necessary to partially overlap data in order to perform the above-described overwriting. Therefore, the overlapping data portion is subjected to overlap processing. However, even in the method of FIG. 5, there is a problem that about several bytes of the ringing portion cannot be read.

From the above, according to the first embodiment of the present invention, the inside of the lead-in area of the optical disc 1
For example, a management data area is provided in a so-called recording management area (RMA), information indicating a linking position at the time of recording is recorded in the management data area, and information indicating a linking position of the management data area is recorded at the time of subsequent reproduction. By performing a predetermined process (change of response characteristics for ringing or window switching process) described later on the basis of the data, the data is basically not lost so much, and the data discontinuity due to the seam between the recordings. The effect of can be avoided. The information indicating the ringing position is recorded separately from the address of the start position and the end position of the data recording or the region for recording the interval between the start position and the end of the data recording in the management data area. .
The information indicating the ringing position is recorded on the optical disc 1.
It is also possible to record not only in the recording management area inside the lead-in area but also in the data recording area, for example, as one of the control data simultaneously with the recording data.

Hereinafter, information indicating the ringing position used in the embodiment of the present invention will be described.

FIGS. 6 to 8 show an example of the information indicating the ringing position, which is updated, for example, every time recording is performed or when the disc is taken out after performing recording a plurality of times. FIGS. 6 and 7 show an example in which information of the linking interval is used as the information indicating the ringing position.
FIG. 8 shows an example in which information of a ringing bitmap described later is used as information indicating a ringing position.

Here, the linking interval in the example of FIG. 6 refers to the number of ECC blocks at which the linking position exists between the recording start address and the end address, in other words, the number of ECC blocks Information indicating whether to perform linking in hexadecimal. Specifically, the linking interval “0” indicates that no linking position exists, and the linking interval “1” indicates 1EC.
The linking position exists for each C block, and the linking interval “F” indicates that a linking position exists for every 16 ECC blocks.

Therefore, at the time of reproducing the optical disk 1, for example, by reading the information of the start address, the end address, and the linking interval recorded in the management data area, the number of ECC blocks for which the linking position exists (what E
Whether linking is performed for each CC block). The information in the management data area is updated, for example, every time data is recorded on the optical disc 1 or when the disc is taken out after performing recording a plurality of times.

The information of the ringing interval shown in FIG. 6 indicates a case where a linking position exists at a fixed linking interval (for each fixed number of ECC blocks) like a so-called CBR (constant bit rate). ,
At a variable linking interval like a so-called VBR (variable bit rate) (for each variable number of ECC blocks)
When there is a linking position, for example, information as shown in FIG. 7 can be used as the information of the ringing interval.

That is, the linking interval shown in FIG. 7 basically has substantially the same meaning as the linking interval shown in FIG. 6, and what the linking position is between the recording start address and the end address. Whether it exists for each ECC block (how many ECC blocks to link)
Is information expressed in hexadecimal notation. For example, a linking interval "0" indicates that no linking position exists, and a linking interval "1" indicates that a linking position exists for each ECC block. However, the linking intervals "F", "E", "C", "E", and "B" in FIG.
“9”, “A”, “E”,... Indicate that a linking position exists for each ECC block corresponding to these hexadecimal values.

In the case of the example of FIG. 7, as in the example of FIG.
At the time of reproduction of the optical disk 1, for example, by reading information on a start address and an end address and a linking interval recorded in a management data area, the number of ECC blocks for which linking exists (which ECC block is to be linked) ) Can be known. In addition, for example, “F”, “E”, “C”, “E”, “B”
By calculating the intervals of “9”, “A”, “E”,..., It is possible to know in which ECC block the linking position exists (for which ECC block linking is performed). The information in the management data area is updated, for example, every time data is recorded on the optical disk 1 or when the disk is taken out after performing recording a plurality of times.

Making the linking interval arbitrarily variable as shown in the example of FIG. 7 is particularly effective when the optical disk apparatus records a moving image or the like at a variable transfer rate. Is preferable in the case where fluctuates.

However, when the linking position is defined by expressing the interval between the start address and the end address of the data recording by the linking interval as in the above-described examples of FIGS. 100
If the number of times of ringing is different at all times, a capacity of as much as 500 bytes is required for the information of the ringing interval. For example, the capacity of 4.7 GB of the DVD-RW is changed to 32.
Assuming that each of the ECC blocks of KB (kilobytes) is mapped, 18.4 KB * 4 = 73.
A capacity of as much as 6 KB is required. If two bytes are required for the information of the ringing interval, it is doubled to 147.2.
KB capacity is required.

The information indicating the ringing position shown in FIGS. 6 and 7 does not specify the address of each ECC block, but only describes the interval of the ringing. Needs to convert the information of the ringing interval into the address of the ECC block. As described above, the process of converting the ringing interval into the address of the ECC block requires an addition operation.
The calculations are very complicated.

Therefore, in the first embodiment of the present invention,
As the information indicating the ringing position, information of a ringing bitmap as shown in FIG. 8 is used.

FIG. 8 shows ringing bitmap information as an example of information indicating a ringing position which is updated each time recording is performed.

That is, in the ringing bit map shown in FIG. 8, each of a, b, c, and d in the horizontal row of FIG. 8 is 1 byte (8 bits) * 4 and has a total size of 4 bytes. Are valid / invalid flags F (F1, F2, F) indicating whether the linking bitmap is valid or invalid.
3,...), A start address and an end address of a ringing bit map when ringing is enabled, an ECC block address, and a link presence / absence flag indicating presence / absence of linking for each ECC block address. Have been.

As described above, in the first embodiment of the present invention, a 1-bit link presence / absence flag is assigned to each ECC block as information indicating a linking position, and the link presence / absence flag is used in each ECC block. The mapping is performed to determine whether or not an error has occurred.
By using the link presence / absence flag as the information indicating the ringing position, the recording area for the linking bitmap can be minimized, and at the time of reproduction, the ringing bitmap and the start and end positions of the data recording can be determined. Data errors occurring at the linking position can be minimized based on the address or the interval between the start position and the end position of data recording.

In the example shown in FIG. 8, the link ECC block at address 3000, which is the first ECC block address, has a link presence / absence flag of "0" and has no linking.
At the address 01, the link presence / absence flag is “0” and no linking is performed. Similarly, for example, at address 3007, the link presence / absence flag is “1”, indicating that a linking position exists. That is, according to the example of FIG.
It can be seen that a linking position exists in the ECC block at the address. Further, according to the example of FIG.
Assuming that the capacity of 4.7 GB of RW is mapped for each ECC block of 32 KB (kilobytes), 18.4K is used to record the presence or absence of a linking position.
B is required, and the entire ringing bitmap can be represented by the capacity of one ECC block.

In the first embodiment, the validity indicating whether the information indicating the linking position is valid or invalid, and whether the information indicating the previously recorded linking position is valid or not is valid.・ An invalid flag is also provided. That is, for example, in the case where linking is not required due to the relationship between the type of the recording signal and the transfer rate, or in the case of a low-cost device such as a portable device, a device that does not manage the linking can be considered.
By providing the valid / invalid flag, it is possible to maintain the compatibility of the linking bitmap between the devices and to effectively operate the device, and to improve the performance of a reproduction signal such as a DVD video.

Here, the valid / invalid flag F indicating whether the linking bitmap is valid or invalid used in the first embodiment has the following meaning.

When the valid / invalid flag F1 = 1 and F2 = 0, it indicates that the area from the start address to the end address of the ringing bit map is valid as the ringing bit map, and that no invalid data exists.

When the valid / invalid flag F1 = 1 and F2 = 1, the area from the start address to the end address of the ringing bitmap is valid as the ringing bitmap, and invalid data exists in other areas. Represents

When the valid / invalid flag F1 = 0 and F2 = 0, it indicates that all data is invalid as a ringing bitmap. In this case, for example, even if the start address and the end address of the ringing bitmap remain, the data in the area from the start address to the end address becomes invalid as the ringing bitmap.

Hereinafter, the function of the ringing bit map will be described more specifically with reference to FIGS.

FIG. 9 shows a map when a linking bitmap is first recorded together with the recording data.
In the example of FIG. 9, ECC block addresses A to H
In the sense that the ringing bitmap has been recorded before, the start address of the ringing bitmap is described as A, the end address of the ringing bitmap is described as H, and the valid / invalid flag F at this time is F1 = 1, F2 =
It is set to 0. That is, in the example of FIG. 9, since the valid / invalid flags are F1 = 1 and F2 = 0, the area from the start address A to the end address H of the ringing bit map is valid as the ringing bit map, and the invalid data Does not exist.

Next, in FIG. 10, while the linking bitmap is already recorded as in the example of FIG. 9, linking information is additionally recorded in an area from I to L of the ECC block address. Shows the result when normal data is recorded without using the data. In the example of FIG. 10, the start addresses A to H are valid as ringing bitmaps, and the ECC block addresses I to L are invalid as ringing bitmaps.
The start address of the ringing bit map is A, the end address is H, and the valid / invalid flags F1 = 1 and F2 = 1. That is, in the example of FIG. 10, since the valid / invalid flags are F1 = 1 and F2 = 1, the area from the start address A to the end address H of the ringing bitmap is valid as the ringing bitmap. Area contains invalid data (invalid data as a ringing bitmap).

Next, FIG. 11 shows a state where the linking bitmap exists at the present time (including a state where the linking bitmap does not exist or not), and the ECC block addresses E to L
4 shows the result when normal data is recorded without recording linking information in the areas up to. In the example of FIG. 11, the valid / invalid flag F1 =
0, F2 = 0. In the example of FIG. 11, since the valid / invalid flags are F1 = 0 and F2 = 0, the address A is used as the start address of the ringing bit map.
Even if the address H remains as the end address, all data is invalid as a ringing bit map. In this case, for example, the ending address of the ringing bit map is set to D, and
If the invalidation flags F1 = 1 and F2 = 1, the area from the start address A to the end address D of the ringing bit map becomes valid as the ringing bit map, and the data of the ringing bit map can be managed.

In the first embodiment of the present invention, by adopting the above-described flag management method using the ringing bitmap, for example, a business device that gives priority to data reliability, For example, it is possible to maintain compatibility when exchanging discs between low-cost devices and the like, regardless of the type.

Further, according to the first embodiment, the relationship between valid data and invalid data as a linking bitmap among the data actually on the disk is clarified by the valid / invalid flag. , Makes management easier. That is, for example, when a ringing bitmap is recorded corresponding to recording data at the time of recording, all information of the ringing bitmap is recorded, and when the ringing bitmap is not recorded, only the above-mentioned valid / invalid flag is recorded. Thus, when the disc is reproduced later, it can be determined from the valid / invalid flag whether or not the ringing bitmap is valid. Thereby, for example, when the ringing bitmap is valid, at the timing of the ringing indicated by the ringing bitmap, processing such as changing response characteristics for ringing and switching windows as described later is performed.
When the ringing bitmap is invalid, normal data processing can be performed. A specific example of processing such as changing response characteristics for ringing and switching windows will be described later.

Further, depending on the recording method, there is a recording method in which ringing does not occur. In the case where there is an area recorded by the recording method in which the ringing does not occur, an area ignored as a ringing bit map, and the like. Even so, according to the embodiment of the present invention, since these can be determined, there is also a merit that the work becomes easier in the editing work and the like performed later.

Further, each numerical value of the ringing bit map described above can be directly converted into the address of the ECC block. Therefore, according to the present embodiment, in order to know the position of the ringing, it is necessary to use FIG. It does not require a complicated addition operation as in the case of FIG.

Here, when a ringing bitmap is recorded in a management data area provided in a recording management area (RMA) as in the first embodiment, for example, the data recording start position and the interval from the recording end to the recording end are set. For example, regarding a 4-byte address indicating a data recording start position and an end position, for example, the field 4 of the format 3 of the recording management area shown in FIGS. Can be recorded in the first half (BP0 to BP11), and in the above-mentioned ringing bitmap, the second half (BP1
2 to BP2047), and fields 5 to 12 shown in FIGS. 13A and 13B.

That is, in the case of this example, at the time of recording, the information of the ringing bitmap is divided and recorded in two areas of the latter half of the field 4 (BP12 to BP2047) and the fields 5 to 12, and at the time of reproduction, these two information are recorded. The information recorded in both is reproduced, and reproduction for ringing is performed using these two pieces of information.

[0104] Actually, in the data area, there is navigation data, which will be described later, which indicates the procedure for determining the address position for reproduction. Therefore, linking control is performed including the navigation data. Will be.

According to such a method, since one bit is allocated to one ECC block as information for linking, information of recording / reproducing position and linking can be recorded with a minimum data amount. Also, by rewriting this map during recording, it is possible to easily check the linking state of the entire area of the disc.

The expression “linking” refers to the conventional M
As in the case of D, etc., 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. Also includes the expression
This is naturally included in the embodiment of the present invention. In particular, the linking in the embodiment of the present invention is performed when data to be continuously recorded on a spiral track or the like is divided and intermittently recorded. , Linking to connect the data discontinuities.

Using the ringing bitmap described above,
At the time of reproduction of the optical disc 1, by reading a ringing bitmap recorded in the management data area or recorded as control data, the ECC block where the linking position exists can be known. The information in the management data area is updated every time data is recorded on the optical disc 1, for example.

The data management area provided in the actual data area in the case of the DVD format will be described below.

Although much described in Japanese Patent Application Laid-Open No. 8-273304, as shown in FIG. 14, the area from the innermost circumference to the outermost circumference of a disk is Recording management area (RMD) area 269 to be used, lead-in area 227, volume and file structure area 270, video manager 71 including a plurality of files 274, video title set 272, other recording area 273, lead-out 2
26 are arranged in this order. Note that this structure conforms to a specific standard as a logical format, for example, micro-UDF.
(Micro UDF) and ISO9660.

In this, the volume and file structure area 270 describes a directory structure by UDF, and according to this description, a video manager 271 as shown in FIG. 15 is described.

The video manager 271 includes volume manager information 275, a video object set 276 for a video manager information menu, and a backup area 277 for volume manager information. The volume manager information 275 describes a volume management information management table 278, a title search pointer table 279, and a video title set attribute table 280.

Title search pointer table 279
Describes a title search pointer as shown in FIG. In this, a start address of the video title set 272, program chain information, and a video title set number are described.

As shown in FIG. 17, the volume management information management table 278 of FIG. 15 includes an identifier of the video manager, a size of the video management information, a version number related to the DVD standard, a category of the video manager, and a volume set identifier. , The number of video title sets, the ID of the provider, the start address and end address of each data, the video attribute, the number of streams, the attribute, and the like are described.

As shown in FIG. 18, a video title set 272 having audio / video data to be recorded / reproduced includes video title set information 294, a video title set menu video object set 295, and a video title set title video object. A set 296 and a backup area 297 of a video title set are described. This video title set 272
In the table, a VTS information management table 298, a VTS direct access pointer table 299, a VTS program chain table 300, and a VTS time search map table 301 are described. The video object set in the video title set 272 has a structure shown in FIG.

The video object set 2 shown in FIG.
82 are each divided into video objects 283,
Each video object 283 is stored in cell 284 and each cell 2
84 comprises a video object unit 285. The video object unit 285 includes a navigation pack (NAV pack) 286, a video pack (V pack) 287, and a sub-picture pack (SP pack) 290.

As shown in FIG. 20, the navigation pack 286 includes a pack header 310 and a system header 31.
1, packet header 312, PCI data 313, packet header 314, and DSI (data search information) data 315.

As shown in FIG. 21, the video, audio, and sub-picture packs each have a pack header 32.
0, packet header 321, video, audio or sub-picture data 322.

Further, in the navigation pack 286, as shown in FIG. 22, addresses of respective video object units are described as logical addresses.

DSI in Navigation Pack 286
Data 312 and 314 are, as shown in FIG.
, General information, angle information, video object search information, and synchronous reproduction information.

As described above, in the DVD, a search is performed at an address at a requested position according to the structure of control data recorded on a disk, and predetermined data is reproduced.

At the time of recording, on the contrary, a file is constructed and recorded step by step so as to have the above-described file structure.

That is, when the AV encoding / decoding section 6 of the optical disk apparatus shown in FIG. 1 enters the recording mode, the MPEG encoder section has a configuration which can be set for each transfer rate as described later. According to the transfer rate set by the user, the signal to be recorded is transferred between the MPEG encoder unit and the 64 Mbit track buffer memory 7 and the audio and video signals are
EG compression. The MPEG encoder unit multiplexes data such as video, audio, and sub-picture data into a unit of a video object unit (VOBU) in order to convert the compressed data into a format for writing to a disk. A unit is set as a video title set, control data similar to the file structure of the reproduction data described above is added thereto, a block position on a disc to be actually recorded is determined, this position is generated as a video manager file, and a signal processing unit is generated. 5, a track buffer memory 7
To memorize.

The linking interval generated during recording can be either fixed or variable. However, the capacity of the track buffer memory 7 of the optical disk device and other operability and reliability are not limited. From the viewpoint of measures for linking and linking, it is desirable to set as follows.

As an example, the operability will be described as an example. For example, when the apparatus is used in an environment where disturbance such as a shock is likely to occur, such as a portable device, the disturbance occurs during the recording and the data is normally read. If a retry is performed because the data was not recorded, it is better to frequently record data in small units. Conversely, in the case of a stationary device, recording a large amount of data at once has advantages such as lower power consumption. Therefore, it is desirable to set a short linking interval in the case of a portable device, and to set a long linking interval in the case of a stationary device.

As a more specific example, for example, the time required for one video object unit (VOBU) in the MPEG compression of video data and the DVD format is 0.
About 5 seconds, 1 sector is 2 KB, processing is performed every 16 ECC blocks, data transfer rate is 8 Mbps in CBR, track buffer memory capacity is 64 Mbits, and 32 Mbits are allocated as the actually used capacity. The video data with a data transfer rate of 8 Mbps in CBR is 4M because one video object unit (VOBU) is about 0.5 second.
The data amount is about a bit. On the other hand, one sector is 2K
B, if one ECC block has 16 sectors, 16 ECC
In the block, 2 (KB) * 16 * 16 = 4.096 (M
Bit) and the data amount of one GOP and 16 ECC
The amount of data per block will be substantially the same.
Further, when 32 M bits are used in the 64 M bit track buffer memory 7, the 32 M bits are substantially equivalent to 128 ECC blocks (that is, 128 * 1).
6 = 2048 sectors). Therefore, in the case of this example, it is desirable to set the linking interval to the cycle of 128 ECC blocks (128 * 16 = 2048 sectors). In the case of VBR as well, the average data transfer rate has a substantially constant value, so that in the case of the above example, a cycle of the linking interval of 128 ECC blocks can be used as an average. As described above, the ringing capacity per time is determined by the capacity of the track buffer memory 7 of the apparatus, other operability, reliability, and the like. Therefore, it is necessary to record the ringing period in the ringing area.

Further, in the optical disk device shown in FIG.
Although details will be described later, the track buffer memory 7
The upper limit capacity (full) and the lower limit capacity (empty) are set respectively, and the signal compressed by the AV encoding / decoding unit 6 is temporarily stored in a 64 Mbit track buffer memory 7 in a predetermined recording unit. And the operation of the optical head 3 is controlled while managing the remaining capacity of the track buffer memory 7. For example, at the time of recording on the optical disk 1, an error correction code, an address and a sync signal are added to the compressed data in the track buffer memory 7, and the laser power is modulated by the strategy circuit of the amplifier unit 4. To record.

If the capacity of the track buffer memory 7 becomes the lower limit capacity (empty) for the reason described later while the recording is continued, the reading from the track buffer memory 7 is stopped. Optical disk 1
Will temporarily stop recording. At this time, the recording of the continuous data is temporarily interrupted in ECC block units, so that the recording data is interrupted on the optical disc 1. Therefore, ringing is required.

For this reason, in the optical disk device of FIG. 1, for example, an ECC for managing the ECC block at the linking position is stored in the internal RAM area of the system controller 9.
A block management area is provided, and an ECC block address of the linking position is recorded by setting a bit corresponding to the linking position to, for example, “1” in the ECC block management area.

Next, when the remaining capacity of the track buffer memory 7 recovers and data can be read from the track buffer memory 7, the system controller 9
Causes the recording to be restarted from the ECC block at the address corresponding to the linking position.

By repeating this operation, continuous recording is performed.

When the data recording as described above is completed, the system controller 9 converts the ECC block address corresponding to the ringing position stored in the built-in RAM area into a linking bit map in the recording management area. . Further, the system controller 9 uses the ringing bit map, the address of the recording start position and the address of the final recording end position at the time of recording the data, and uses the linking bit at the first part of the field 4 of the format 3 of the recording management area as described above. A valid / invalid flag indicating whether the bitmap is valid or invalid is arranged.
The addresses of the recording start position and the final recording end position at the time of recording the data are arranged in the first half (BP0 to 11) of the data, and the second half of the field 4 (BP12 to 20).
47) and data in which a ringing bitmap is arranged from field 5 to field 12 is generated, and this data is recorded as data relating to the ringing position in, for example, a recording management area of the optical disc 1.

Since the addresses of the start position and the end position at the time of data recording are the positions of the image data itself, it is naturally desirable to record the data substantially simultaneously with the image as control data of the image data. On the other hand, the ringing bitmap has no direct relation to the image data as in the case of the start position and the end position at the time of data recording. Since the information of the ringing bitmap is determined based on the result of managing the remaining amount of the track buffer memory 7, the information of the ringing bitmap is stored in the control data in the same manner as, for example, the start position and the end position in data recording. In order to do such things as to record in the address data will be returned from the drive part to the encoder part,
Management becomes very complicated and practically impossible. Even if it could be done, the linking position occurs once every 0.5 seconds, for example, so that many addresses are recorded. For example, in order to record a 4-byte address as an absolute address on the optical disc 1, Requires a large number of recording areas, and a loss of the data area on the optical disc 1 occurs.

Therefore, in the present embodiment, as described above, the information of the ringing bit map is stored in the RAM area of the system controller 9 separately from the addresses of the start position and the end position recorded together with the image data. ,
At the end of recording, the ringing bitmap stored in the RAM area is read out and recorded at a predetermined position in the recording management area of the optical disc 1, so that the recording process can be easily performed. The linking bit map requires 4 bytes (32 bits) of the absolute address, whereas the linking bit map maps the ECC blocks of the entire area of the optical disk to 1E.
Since the CC block is allocated to one bit, the information amount is 1
/ 32.

Next, the ringing interval is determined from the viewpoint of the capacity of the track buffer memory 7, other operability and reliability, and measures for linking as described above. For example, assuming that the capacity of the tracking buffer memory 7 is 64 Mbits and one ECC block is 32 KB, the ringing interval is an interval of every 250 ECC blocks.

Here, consider a case where recording is performed a plurality of times on, for example, all areas of the optical disc 1. In this case, the recording start position is always the same position (in the example of FIG. 8, the address is always 3000). As described above, when the recording start position is always the same position, for example, a phase change type DVD
-In the case of an optical disc having a limited number of recordable times, such as a RAM, recording is repeated at the same recording start position, and as a result, characteristics such as jitter of a reproduction signal are greatly deteriorated. In practice, the reproduced signal cannot be read. If the recording start position is fixed as described above and the ringing position is always the same at a constant interval of every 250 ECC blocks, recording is repeated at these ringing positions, and the characteristics of the reproduced signal deteriorate. Resulting in. Since the recording area other than the recording start position and the ringing position is randomly recorded due to the jitter of the recording data or the like, the probability that recording is performed at the same position a plurality of times is low, and the characteristic degradation of the reproduced signal is reduced. It is rarely a problem.

Therefore, in the optical disk device according to the embodiment of the present invention, for example, the ringing position management area in the ECC block management area in the built-in RAM area of the system controller 9 is used to read the previous ringing position from the optical disk 1. The ringing position is changed (optimized) and recorded so that the new ringing position comes to an address obtained by incrementing the previous ringing position by, for example, +1 (increment). In addition,
In the present embodiment, such ringing position shift processing is performed by software of the system controller 9, but it is needless to say that similar processing can be performed by a hardware configuration.

As described above, by incrementing the address of the ringing position for each recording, the optical disk 1
Record life can be extended. That is, when the ringing interval is every 250 ECC blocks, the number of times that one ECC block becomes the ringing position can be reduced to 1/250.

Although the example of incrementing the address of the ringing position has been described here, the same effect can be obtained by a method of randomly changing the address of the ringing position. That is, in the present embodiment, the linking positions are dispersed so as not to be the same for each recording, so that the life of recording and reproduction of the optical disc 1 is greatly improved.

Next, when reproducing the optical disk 1 on which the ringing bitmap as described above is recorded,
It looks like this:

At the time of the reproduction, first, the management data area on the recording management area on the innermost circumference of the optical disc 1 is reproduced, and the system controller 9 reads the ringing bit map from the reproduction data in the management data area.

That is, the system controller 9 determines the data recording start position and the recording position arranged in the first half (BP0 to 11) of the field 4 of the format 3 of the recording management data (RMD) described in the recording management area. The address of the end position is read, and the range of the area on the optical disk 1 where recording has been performed is recognized.

Next, the system controller 9 checks the latter half of the field 4 of the format 3 (BP12 to 204).
7), the linking bitmaps arranged in the fields 5 to 12 are read out and stored in the linking position management area provided in the built-in RAM for management.

In the system controller 9, the built-in RAM
The ringing bit map stored in the upper linking position management area is converted into an address position based on the address signal detected through the sync detection in the signal processing unit 5, and the converted address position and the current address position are converted. To predict whether the address of the next ECC block to be reproduced contains linking.

Here, if the system controller 9 predicts that the ECC section to be reproduced next contains ringing, it sends the information to the signal processing section 5 and the amplifier section 4 as described later. When the signal processing unit 5 and the amplifier unit 4 receive the ringing information, based on the information,
Processing for interpolation, such as changing response characteristics for ringing and switching windows, which will be described later, is performed. The details of the processing for interpolation in the signal processing unit 5 will be described later.

By the way, at the time of reproduction, the linking position can be known by reading the information in the above-mentioned management data area. However, at the linking position, there is a high possibility that a part of the data is destroyed. There is a possibility that the data of those bytes cannot be reproduced.

In view of the above, in the present embodiment,
By performing the following special measures on the data (signal) corresponding to the linking position, more reliable reproduction is realized.

The first for the data at the linking position
In order to cope with the above, a method of increasing the error correction processing capability for the data at the linking position can be considered.

That is, in the signal processing section 5 of FIG. 1, the error correction of both the parity PI and the PO is normally performed once, and as a result, if there is no problem, the processing shifts to the error correction processing of the next ECC block. In the case where the error correction has not been completed by the second error correction, the error correction is performed two or three times within a predetermined time. In the case of the present embodiment, however, the linking position requiring the error correction is particularly set in the ECC block. Unless the unit is continuous, a predetermined time for error correction for the data at the linking position is extended, and the error correction processing is further performed a plurality of times.

However, when the data at the linking position is extended for a predetermined time for error correction,
The processing timing of each ECC block continuously reproduced from the optical disc 1 is delayed. Therefore, in the present embodiment, for example, writing / reading in the track buffer memory 7 and ECC in the signal processing unit 5 are performed.
By controlling the processing, the ECC of the ringing position is controlled.
The delay time is absorbed after the ECC block next to the block. The system controller 9 performs the control for extending the predetermined time for error correction in the signal processing unit 5 and the control for writing / reading the track buffer memory 7 as described above.

Next, as a second countermeasure, the first method described above is used.
Contrary to the countermeasure described above, on the assumption that an error occurs in the data at the linking position, for the error occurring at the ringing position, error correction is not performed, or data for decoding is not performed. A method of not performing the processing is considered.

That is, in the second countermeasure method, a data error occurring at a linking position is ignored within a predetermined error amount range, or an error at the linking position is detected when decoding data. By performing a process such as freezing the decoding process on the data, a problem due to a data error at the linking position is avoided.

Further, as a third countermeasure method, a method of realizing a stable reproduction process by performing a predetermined process described below on the reproduction signal corresponding to the linking position can be considered.

That is, since recording is performed intermittently at the linking position, the signals before and after the reproduced signal corresponding to the linking position include the amplitude, frequency, phase (temporal timing), asymmetry, and quality ( Jitter, etc.) may have changed. Also, occurrence of missing bits or unnecessary bits may be considered. Therefore, in the optical disc device of the present embodiment, when reproducing the optical disc, for example, the reproduction signal corresponding to the linking position is, for example,
(1) Switching the response characteristic of an AGC (automatic gain control) circuit for adjusting the gain of the reproduced RF signal (for example, increasing the response speed); and (2) Equalizer for adjusting the frequency characteristic of the reproduced RF signal ( (3) changing the slice level for binarizing the reproduced RF signal (for example, changing the voltage of the slice level by inserting a transient waveform) or a filter (feedback). (E.g., increasing the frequency characteristics and response speed) of the response characteristics of the low-pass filter of the type (4).
Changing the response characteristics of the PLL circuit (for example, increasing the response speed), or locking the PLL in the linking position because there is a possibility that no data exists as in the case of a defect, for example, (5) Linking Since there is a possibility that no data exists at the position as in the case of a defect, for example, a stable reproduction process is realized by performing a process such as pre-holding the drive output of the servo system in that section.

However, if processing such as raising the response characteristics as described above is performed on a normal reproduced signal, the performance may be degraded, for example, when an optical disk having a fingerprint or a scratch is reproduced. The predetermined processing of the third countermeasure is performed only in the section of the signal corresponding to the linking position. Note that the optical disc apparatus has a configuration for performing the above-described switching of the response characteristics for the same purpose, for example, immediately after seeking to a target track or immediately after switching between recording and reproduction. Can be applied to the reproduction signal section corresponding to the linking position.

FIG. 24 shows an essential configuration of the optical disk device according to the first embodiment of the present invention for realizing the third coping method. In the example of FIG. 24, the amplifier unit (preamplifier) 4, the signal processing unit 5, the servo unit 8, and the system controller 9 of FIG. 1 are extracted and the internal configuration thereof is shown.

In FIG. 24, an optical head (PU)
The reproduction RF signal from the AGC circuit 41
Is input to In the AGC circuit 41, the optical head 3
The gain of the reproduced RF signal is automatically adjusted to a predetermined signal level, and the reproduced RF signal after the gain adjustment is sent to the equalizer 42. The equalizer 42 controls the reproduction R from the AGC circuit 41.
The frequency characteristic of the F signal is raised and sent to the binarization circuit 43. The binarization circuit 43 binarizes the reproduced RF signal from the equalizer 42 at a predetermined slice level, and
The value reproduction signal is sent to the PLL circuit 44. PLL circuit 44
In this case, the PLL is locked by the binary reproduction signal. The binary reproduced signal thus PLL-locked is sent to the signal processing unit 5.

The binary reproduced signal input to the signal processing unit 5 is first sent to the sync detector 51. The sync detector 51 detects the sync shown in FIG. 2 included in the binary reproduced signal, and sends a timing signal based on the sync to the address detector 52 and the linking timing generator 54. Further, a reproduction signal via the sync detector 51 is also sent to the address detector 52. The address detector 52 decodes the address included in the reproduction signal at the timing of the sink, and sends the address to the system controller 9. The reproduction signal via the address detector 52 is sent to the data processor 53. The data processor 53 performs demodulation of the EFM + signal and decoding of the digitally reproduced signal into NRZ data, and further performs error correction processing to generate reproduced data.

The ECC block address management section 91 of the system controller 9 manages the address of each ECC block based on the address from the address detector 52, and the data processor of the signal processing section 5 uses the address of each ECC block. The data processing in 53 is controlled in units of ECC blocks. The linking position management unit 92 of the system controller 9
A timing signal corresponding to the linking position in the ECC block is generated based on the address from the ECC block and the information on the linking position extracted from the reproduction signal. The timing signal corresponding to the linking position in the ECC block is sent to the linking timing generator 54 of the signal processing unit 5.

The linking timing generator 54 receives the timing signal based on the sync supplied from the sync detector 51 and the timing signal corresponding to the linking position in the ECC block supplied from the linking position manager 92 of the system controller 9. As a result, a linking timing signal as shown in FIG. That is, the linking timing generator 54 extracts the signal section corresponding to the linking position as shown in FIG. 25A from the reproduced RF signal shown in FIG. Then, a binary linking timing signal "H" or "L" is generated. In the example of FIG. 25, the “L” portion of the linking timing signal is
This corresponds to a signal section for extracting a signal section at the linking position from the reproduced RF signal. This linking timing signal is supplied to each of the switching control circuits 45, 46,
47 and 48 and are sent to the hold circuit 81 of the servo circuit 8.

The switching control circuit 45 of the amplifier unit 4 includes an AGC
This is a control circuit for switching control of the response characteristic of the circuit 41. In the section where the linking timing signal is "L", that is, in the signal section corresponding to the linking position, the reproduction RF signal is output.
Control is performed to increase, for example, the AGC response speed to the signal.

The switching control circuit 46 of the amplifier unit 4
A control circuit for changing an equalizing characteristic of the equalizer, in a section where the linking timing signal is “L”, that is, in a signal section corresponding to the linking position,
Control is performed to change the equalizing characteristics for the reproduced RF signal.

The switching control circuit 47 of the amplifier section 4 is a control circuit for changing and controlling the slice level of the binarization circuit 43 and the response characteristic of the filter, and is a section where the linking timing signal is "L", that is, the linking. In the signal section corresponding to the position, the voltage of the slice level for the reproduction RF signal or the process of increasing the response speed is changed, or
Control to increase the frequency characteristics and response speed of the filter.

The switching control circuit 48 of the amplifier unit 4 includes a PLL
A control circuit for changing and controlling the response characteristics of the circuit. In a section where the linking timing signal is at "L", that is, a signal section corresponding to the linking position, the response speed of the PLL circuit is increased or the PLL is locked. Such control is performed.

The servo section 8 further includes at least a focus servo circuit 82, a tracking servo circuit 83, and a spindle servo circuit 84. The hold circuit 81 includes the focus servo circuit 82, the tracking servo circuit 83, and the spindle servo circuit. Each drive output 84 is controlled so as to output a pre-hold and a reference voltage in a section where the linking timing signal is “L”, that is, in a signal section corresponding to the linking position.

The optical disk device according to the first embodiment of the present invention has the configuration shown in FIG. 24, so that it is possible to realize the processing of the third coping method in the signal section corresponding to the linking position. I have. Note that the switching control in each of the switching control circuits 45, 46, 47, and 48 of the amplifier unit 4 performs all switching control in a section where the linking timing signal is “L” (a signal section corresponding to the linking position). This may be performed, or only one of the switching controls may be performed, or some of the switching controls may be performed in an adaptive combination.

The linking timing signal having the structure shown in FIG. 24 can be used as a timing signal for executing the above-described first and second measures.

Further, in the first embodiment,
If data other than the information of the linking position, such as the laser power at recording, the ambient temperature, and the strategy value, are recorded in the management data area, the difference between the data before and after the linking position can be predicted. As a result, it becomes possible to more appropriately set the response characteristics and the like of each item in the third countermeasure method.

If the recorded optical disc device changes depending on the linking position due to, for example, editing, etc., the individual identification number of the optical disc device itself is recorded in the management data area. If the optical disk device that has identified the optical disk device and has performed recording based on the identification number is its own device, it controls each item of the above-described third countermeasure by a normal method. A method such as changing the value is also possible.

According to these methods, it is possible to provide an apparatus that more stably realizes recording and reproduction with less occurrence of errors and the like even in an optical disk apparatus capable of high-density recording and reproduction.

Here, in the configuration of FIG. 24 described above, the sync detector 51 detects the sync of the reproduced signal. This sync detection is performed as shown in FIG. 14T or 14T included in the reproduced signal of
Sync patterns SYNC1, SYNC, which are + 3T signals
.. Are detected by detecting C2, SYNC3,.

In normal sync detection, an internal sync at a predetermined timing is generated so that the detection of the sync pattern is not affected by defects on the disk, and at the same time, as shown in FIG. A sync window for detecting a proper sync pattern is generated, and when a sync pattern in a reproduction signal is detected within the sync window, the sync pattern is set as a regular exterior sink, and the internal sink is switched to the regular exterior sink. Techniques have been adopted.

However, if there is a ringing position in the reproduced signal, due to the influence of the linking, for example, as shown in FIG.
As in the sync pattern SYNC3 or SYNC4 in (a), the sync position may be shifted in time from the original position. In this case, the sync pattern (SYNC3 or SYNC3) in the reproduced signal does not fall within the sync window shown in FIG. 26 (b), and a regular exterior sync may be detected as shown in FIG. 26 (c). It will not be possible (not detected). In this way, if a proper exterior sink cannot be obtained, processing such as decoding is performed using an interior sink that does not completely match the proper exterior sink, and in some cases, all data May result in an error.

Therefore, in the sync detector 51 of the optical disk device of the present embodiment, near the ringing position, control is performed so as to widen the width of the sync window for the reproduced signal as shown in FIG. ing. As a result, as shown in FIG. 26E, even when the position of the sync pattern is temporally shifted due to ringing, the sync pattern in the reproduction signal can be accurately detected.

FIG. 27 shows a specific example of the configuration of the sync detector 51 which can increase the width of the sync window at the ringing position as described above.

In FIG. 27, terminal 101 is
Playback data is supplied from the PLL circuit 44 of the amplifier section 4 of FIG. 4, and a ringing timing signal from the ringing timing generator 54 of FIG. The reproduction data from the PLL circuit 44 is sent to the sync pattern detection unit 102, and the ringing timing signal is sent to the timing control unit 104.

When the sync pattern is not detected from the reproduced data, the timing control section 104 performs the operation shown in FIG.
The control signal for generating the sync window shown in (b) of FIG. 6 is sent to the window control unit 103, and the control signal for generating the above-mentioned interior sink is sent to the exterior / interior sink generation unit 105. As a result, the exterior sink / interior sink generation unit 105 outputs the interior sink as a sync signal. The sync signal of the internal sink is sent to the address detector 52 of FIG. Note that the sync signal from the exterior / interior sink generation unit 105 is supplied to the terminal 107.
Via the ringing timing generator 54.

The sync pattern detecting section 102 detects the above-mentioned 14T or 14T + 3T sync pattern from the reproduction data by the sync window supplied from the window control section 103, and when the sync pattern is detected, generates a timing signal of the detected sync pattern. Send to control unit 104.

When the timing control unit 104 receives the sync pattern detection signal from the sync pattern detection unit 102, that is, when a sync pattern is detected from the reproduction data, the timing control unit 104 detects the sync pattern detection timing from the reproduction data. The control signal for generating the above-mentioned exterior sink is transmitted to the exterior / interior sink generation unit 10.
Send to 5. As a result, the exterior sink / interior sink generation unit 105 outputs the exterior sink as a sync signal. The sync signal of the exterior sync is sent to the address detector 52 of FIG.

When the ringing timing signal is supplied from the ringing timing generator 54, the timing control section 104 sets the sync window for the reproduced signal near the ringing position as shown in FIG. 26 (e). A control signal for increasing the width is sent to the window control unit 103.

As a result, the sync detector 5 shown in FIG.
In 1, the sync pattern in the reproduction signal can be accurately detected even if the position of the sync pattern is temporally shifted due to ringing.

In the first embodiment described above, information for indicating the linking position is recorded in the management data area on the optical disc 1, and when the optical disc 1 is reproduced, the information indicating the linking position is reproduced. Although an example has been described in which the above-described first and second coping methods and most preferably the third coping method are realized based on the information, in the present invention, the management data area of the optical disc 1 is not necessarily stored in the management data area. Even if the information indicating the linking position is not recorded, the first, second, or third countermeasures can be realized.

That is, in the second embodiment of the present invention, when recording a signal on the optical disk 1, the information indicating the linking position is not generated, and the management data area of the optical disk 1 is not generated. Also, information indicating the linking position is not recorded in the sector address, for example, at a sector address (for example, a data address corresponding to the LPP address) on the optical disc 1 to determine whether the linking position exists in the sector. Make sure to record a flag to indicate this.

Therefore, in the case of the second embodiment, when the optical disk 1 is reproduced, the above-described third method is realized based on the flag recorded in the address portion. .

In the second embodiment of the present invention, as an example, at the time of recording on the optical disc 1, for example, FIG.
Immediately after the first sync shown in (1), a flag for indicating a data address and a linking position is recorded. In this case, at the time of reproduction of the optical disk 1, the data address after the first sync is decoded, and according to the value of the flag for indicating the linking position, for example, from the 82nd byte of the second sync in FIG. A linking timing signal corresponding to the linking position existing in the 87th byte is generated, and the above-described first, second, and preferably third countermeasures are executed based on the linking timing signal.

FIG. 28 shows an essential part of the configuration of an optical disk apparatus for realizing the above-described third solution in the second embodiment of the present invention. In FIG. 28, components having functions substantially similar to those in FIG. 24 are denoted by the same reference numerals as in FIG. 24, and detailed description thereof will be omitted.

The configuration of FIG. 28 differs from the configuration of FIG. 24 in that the system controller 9 is not provided with a linking position management unit. The address detector 52 of the signal processing unit 5 detects the flag indicating the linking position together with the decoding of the address. Further, in the linking timing detection 55, the timing signal based on the sync from the sync detector 51 and the detection signal of the flag corresponding to the linking position from the address detector 52 are shown in FIG. Such a linking timing signal is generated. This linking timing signal is sent to the amplifier unit 4 and the servo unit 8 as in FIG.

Also, the sync detector 51 of the optical disk device of the second embodiment is similar to the first embodiment.
The width of the sync window is increased according to the ringing timing signal.

The optical disk device according to the second embodiment of the present invention has the configuration shown in FIG. 28, so that the information indicating the linking position is not recorded in the management data area of the optical disk 1. It is possible to realize the above-described third countermeasure at the linking position on the actual optical disc 1.

Also in the second embodiment, the switching control in each of the switching control circuits 45, 46, 47 and 48 of the amplifier unit 4 is performed according to the linking timing signal, as described with reference to FIG. All at the same time, or only one of the switching controls, or
Any of these can be performed in an adaptive combination. Further, the linking timing signal can be used as a timing signal when the above-described first countermeasure method and second countermeasure method are executed.

Here, in the configuration example of FIG. 28,
The type of the loaded optical disc 1 is also determined. That is, the configuration of FIG. 28 is such that when the optical disc 1 is loaded in the optical disc apparatus,
The disc type discriminating section 100 discriminates the type of the optical disc 1 and, depending on the result of the discrimination, determines whether or not to take measures against the linking position as described above. As the method of discriminating the type of the optical disc in the disc type discriminating section 100, various discriminating methods existing in the related art can be applied. In the present embodiment, in particular, the applicant of the present invention has disclosed 353912
The discrimination method proposed in the specification of the issue and the drawings is used.

For example, as a result of the disc type discrimination, the reproduction of the optical disc 1 is performed irrespective of whether or not the type of the optical disc 1 is of the recording type and the flag indicating that the linking position exists in the sector is recorded. Is started, the above-described processing at the linking position is performed. That is, all ECCs that are not at the linking position
The processing of the above-described third countermeasure method is also performed at the block linking timing.

Incidentally, it is also possible to carry out the first or second coping method. In addition, the sync detector 51 of the optical disk device according to the second embodiment may also widen the width of the sync window according to the ringing timing signal, as in the first embodiment.

On the other hand, as a result of the disc type discrimination, when the type of the optical disc 1 is, for example, the read-only type, or when the flag indicating the existence of the linking position is not recorded in the sector (the second embodiment) When the form is not applied), the system controller 9 controls the signal processing unit 5
Of the linking timing detector 55 so as not to generate a linking timing signal. Thereby, when the type of the optical disc 1 is, for example, a reproduction-only type, it is possible to prevent the control such as switching to the response characteristic as in the above-described third countermeasure method from being performed. Can not be.

In the second embodiment, the write / read control of the track buffer memory 7,
Recording / reproduction control on the optical disc 1 and compression / decompression control by the AV encoding / decoding section 6 are basically the same as those in the first embodiment. However, in the case of the second embodiment, as described above, for example, the first embodiment of FIG.
Immediately after the sync, a flag for indicating a data address and a linking position is recorded, and at the time of reproduction, reproduction is performed based on the flag of the linking position, etc.
The second embodiment differs from the first embodiment in that linking position information is not recorded in the management data area.

In each of the embodiments described above, for example, the above-described third countermeasure method is used as a countermeasure against ringing. However, in the present invention, the third countermeasure method is further applied to ringing as described below. It is also possible to add a fourth countermeasure according to the relationship between the error caused and the error that normally occurs. Of course, it is also possible to use only the fourth coping method.

That is, for example, at least a correctable level error occurs at the ringing position, but in some cases, an uncorrectable error may occur.
Therefore, if it is possible to discriminate between the error at the ringing position and the normal error generated due to, for example, a scratch on the disk, it is possible to take some measure especially for the error at the ringing position. .

Therefore, in the embodiment of the present invention, as shown in FIG. 29, the number of errors generated in the ECC block (without link) which is not at the normal ringing position and the error count generated in the ECC block (with link) at the ringing position If the ECC block at the ringing position is determined to have a large number of errors based on the result of the comparison, the data is read out and recorded again to perform ringing processing. The reliability of the data in the ECC block at the position is ensured. The determination based on the error is performed not only when instructed by the user, for example, but also automatically when loading, recording, or reproducing the optical disc 1, or when there is no access. May be determined using a clock or a timer, and may be automatically performed.

More specifically, in the optical disk device according to each embodiment of the present invention, first, data recorded at the ringing position is read, and for example, data is read from the ECC block management area in the built-in RAM area of the system controller 9. It is stored in the ringing position management area.

Thereafter, during the normal reproduction operation, the signal processing unit 5 shown in FIG. 1 performs the error correction of the reproduction data of each ECC block, regardless of the presence or absence of the ringing position. Is sent to the system controller 9.

In this case, the system controller 9 includes:
An internal register area for the ECC block at the linking position and an internal register area for the ECC block at a non-ringing position are provided, and the error rate of the ECC block at the ringing position supplied from the signal processing unit 5 and the ringing position do not exist. The error rates of the ECC blocks are stored in corresponding internal register areas.

Next, the system controller 9 accumulates the error rates stored in the respective internal register areas a plurality of times. At this time, for example, if linking occurs once every 250 ECC blocks as described above, there are 249 ECC blocks that are not in the linking position for one ECC block in the ringing position. Sets the integrated value to 1/249. Thereby, by comparing the relative ratio between the error rate of the ECC block at the ringing position and the error rate of the ECC block at the non-ringing position, it is possible to determine the correlation of the error due to the presence or absence of the linking.

Here, when only the error occurring in the ECC block at the linking position exceeds a predetermined judgment value, it is appropriate to consider that there is some problem in the method of recording the linking and other problems. That is, recording devices as optical disk devices range from highly reliable devices for business use to portable devices and inexpensive devices. In addition, the capacity of the track buffer memory 7 is small and the number of times of linking itself is large depending on the device. In some cases, there is also a case where the linking method is not superior or inferior depending on each device, and the frequency of occurrence of errors may be different due to these factors.

In such a case, depending on the device, even if an uncorrectable error has not occurred at the linking position at this time, the margin for error correction is reduced due to, for example, an acquired scratch, and an uncorrectable error occurs. It is conceivable that the probability of doing so increases.

The optical disk device according to the third embodiment of the present invention is provided with a notifying means for notifying a user of a situation where the probability of occurrence of an uncorrectable error at the ringing position as described above is high. . As the notification means, for example, a display means for giving a warning or guidance to the user, a sound emitting means for giving a warning by voice, and the like are provided.

In the optical disk device according to the third embodiment, as a countermeasure for the case where the error occurrence probability becomes high, for example, data read from the optical disk is once written into an external editing device or the like, and then the editing is performed. By re-recording the data read from the device on the optical disk 1, the quality of the data is confirmed and improved, and the reliability of the data is improved.

When comparing errors in this way, it is necessary to categorize errors generated due to factors such as flaws and errors caused by linking. In the present embodiment, by referring to the information of the ringing bitmap, it is determined that many errors occur at a place other than the linking position, or that an error that occurs at random is caused by a scratch or the like. Is not performed.

For this reason, the error rate detection operation is performed by using only the integrated data when at least a predetermined time or a predetermined amount of data (eg, 64 linking times) is stored in the register during reproduction. The data is valid, and the integrated data when the time is equal to or less than the predetermined time or the predetermined capacity is invalid. This results in highly reliable data.

FIG. 30 shows a schematic configuration of an optical disk device according to the third embodiment. FIG. 30 shows a configuration in which the optical disk device according to the embodiment of the present invention is applied to, for example, a video camera. 30, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

That is, in the case of the optical disk device of the third embodiment shown in FIG. 30, 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 decompressed video data into, for example, the NTSC format, and a liquid crystal display 1 for displaying video.
7. CCD (solid-state imaging device) 19 for converting an image via an optical system (not shown) into an electric signal, and decoder 1 for converting an electric signal (imaging signal) from the CCD 19 into video data
8. 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 are connected. The key input unit 10 in this example is used to operate an optical zoom lens, in addition to a power on / off switch, a recording start button, a play button, a stop button, and the like, which are usually provided in a video camera. And other zoom operation buttons.

The liquid crystal display 17 and the speaker 15 are used as notification means for notifying the user of the situation where the probability of occurrence of the uncorrectable error is high.

Next, when a signal such as video or audio is compressed / expanded by the AV encoding / decoding section 6 of the optical disk device according to each embodiment of the present invention, the signal is recorded / reproduced on / from the optical disk 1. Recording mode set when performing
Setting of the compression / decompression rate in the encoding / decoding section 6, the recording / reproducing rate of the optical disc, the writing / reading rate of the track buffer memory 7, and the upper limit capacity (full) and the lower limit capacity (empty) of the track buffer memory 7; Details of the control of the track buffer memory 7 will be described below.

In each embodiment of the present invention, for example, the terminal 1
In the case where the input / output rate of the original image signal or the reproduced image signal input to 1 is 10 Mbps, and the recording / reproducing rate of the optical disc 1 is 10 Mbps, the compression / decoding in the AV encoding / decoding section 6 is performed. The expansion rate can take three rates of 8 Mbps, 4 Mbps, and 2 Mbps. The recording mode uses 8 Mbps as the compression / expansion rate and can record / reproduce data for 2 hours on the optical disk. High-quality recording mode and 4M compression / expansion rate
A high-quality mode (medium-quality recording mode) that enables recording / reproduction for 4 hours on the optical disk using bps, and a recording / reproduction for 8 hours on the optical disk using 2 Mbps as the compression / expansion rate. Each of the recording modes can be selected from among a fixed transfer rate (CBR) and a variable transfer rate (VBR) in which image quality is prioritized with respect to a normal quality recording mode enabling reproduction / reproduction. 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 encoding / decoding section 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, 128 ECC Set a block as one linking unit.

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 disk device according to each embodiment of the present invention, the recording in the case where the data such as video continuously compressed and encoded by the AV encoding / decoding section 6 is intermittently recorded on the optical disk 1 will be described. The operation of the mode, the compression rate of the AV encoding / decoding section 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 disk 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 via 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 determined in accordance with the information input by selecting the recording mode and setting the recording time, as shown in FIGS. The capacity (full: FULL) and the lower limit capacity (empty: EMPTY) are set. The details of FIGS. 31 to 33 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 corresponding 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 compression 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 amount of data stored in 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
Intermittent recording of data such as video, which is continuously compression-encoded in the V-encoding / decoding step, on the optical disc 1 is performed.

The system controller 9 controls the capacity of the track buffer memory 7 and obtains the sector address of the LPP block to be recorded and the address of the ECC block at the linking position set as described above. Based on the address of the linking sector corresponding to the linking position, the timing of adding an error correction code, adding an address or a synchronization signal in the signal processing unit 5 is managed. That is, the system controller 9 performs timing management of various signal processing such as generation of an error correction code so that recording, reproduction, and termination are performed in a linking sector for linking, and by repeating this, the video is reproduced. Intermittent recording of such data.

Further, the system controller 9 records the start address and the end address of the management data area of the optical disc 1 and the information of the linking position when the recording is completed.

The following describes in detail how to manage the capacity of the track buffer memory 7, control write / read, and control the write / read rate during recording on the optical disc 1, with reference to FIGS.

FIGS. 31 to 33 show how the writing / reading of the track buffer memory 7 is controlled, the writing / reading rate is changed, and the capacity of the optical disk 1 is changed. FIG. 31 shows a case where the compression rate in the AV encoding / decoding section 6 is 2 Mbps (the write rate of the track buffer memory 7 is 2 Mbps).
Shows a case where the compression rate (write rate) is 4 Mbps, and FIG. 33 shows a case where the compression rate (write rate) is 8 Mbps.

In FIGS. 31 to 33, A in FIG.
The period indicates the period from the start of writing data to the track buffer memory 7 whose storage capacity is the initial value 0 at the start of recording until the data is written to the predetermined upper limit capacity (full). 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. A period B in the figure indicates a period from when data reading is started from the track buffer memory 7 having a predetermined upper limit capacity (full) to when data is read to a predetermined lower limit capacity (empty). 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. 31 showing a 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. 32 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. 32, during the period B, writing to the track buffer memory 7 is continued at a write rate of 4 Mbps, so that 10 (Mb)
(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. 33 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. 33, in the period B, writing to the track buffer memory 7 is continued at a writing rate of 8 Mbps, and therefore, 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. 31 to 33, 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 AV 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 the setting is as low as ps and 8 Mbps, the standby state during the period A or the period C (waiting for recording on the optical disk 1)
Thus, continuous compression encoding 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 via the ATAPI interface unit 13 is intermittently recorded on the optical disk 1, the optical disk device of the present embodiment performs recording by the following method. Note that the ATAPI
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.

[0239] Although not shown in the drawings, in the optical disk device of the present embodiment, a track buffer memory for continuously recording data such as moving images supplied through the ATAPI interface unit 13 on the optical disk 1 is described. 7 capacity management and write / read control and write / read
The operation such as the reading rate will be described.

When recording data such as a moving image on the optical disk 1 via the ATAPI interface section 13, the system controller 9 first checks the remaining storage capacity of the track buffer memory 7 via the signal processing section 5. Further, a predetermined upper limit capacity (full: FULL) and a lower limit capacity (empty: E
MPTY).

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, 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. 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.

In this state, writing and reading to and from the track buffer memory 7 are continued. 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 amount of data stored in 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
Continuous recording of data such as a moving image on the optical disk 1 via the TAPI interface unit 13 is realized. 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, so that the recording of the linking position as described above becomes unnecessary. Therefore, as the linking interval and the mapping information recorded in the management data area, values indicating no linking position (linking interval “0”, linking presence / absence “0”, etc.) are recorded.

When the recording is completed, the system controller 9 records the start address and end address of the management data area of the optical disc 1 and the information of the linking position (linking interval “0”, linking presence / absence “0”). , 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 when recording on the optical disc 1 will be described.

When recording data such as a program file supplied via 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 has a transfer rate higher than the recording rate on 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 interface unit 1 of the ATAPI
The data amount of the program file and the like supplied via the data line 3 is relatively small, and it is hardly continuous data. Therefore, when recording data such as the program file, it is desirable to set the linking interval to a value that matches the data amount. For example, when the data amount of a program file or the like is in a range of about 2 (KB) * 16 = 32 (KB) of one ECC block, the linking interval is set in units of one ECC block.

In this example, the system controller 9
Performs timing management of various signal processing such as generation of an error correction code for each ECC block, and repeats this to record data such as a program file and perform 1 ECC
The arrangement of the ringing position for each block is executed, and when the recording is completed, the ringing bit map is recorded in the management data area of the optical disc 1.

The system controller 9 in this example
Performs the above-described capacity control of the track buffer memory 7 and at the same time, based on the difference between the sector address of the LPP block to be recorded and the address of the linking sector.
The timing of adding an error correction code, adding an address or a synchronization signal in the signal processing unit 5 is managed. further,
When the recording is completed, the system controller 9 records the ringing bitmap in the management data area of the optical disc 1.

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 linking interval is set to one ECC block.

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 apparatus 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 section 6 is recorded, the recording mode and the AV encoding / decoding section are used. The expansion rate, the capacity management of the track buffer memory 7, the operation of 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 such as decompression rate (the same rate as the compression rate at the time of recording) in the AV encoding / decoding unit 6, recording start address and end address, and data such as linking interval and mapping information as linking position are arranged. Have been.

The system controller 9 extracts data such as a recording start address and an end address, a linking interval relating to a linking position, and mapping information from the control data, and reproduces the data based on the linking interval and the mapping information. Manage the linking position at the time.

Here, when data compressed by the AV encoding / decoding unit 6 is recorded, for example, the linking interval indicates that linking is performed on the optical disc 1 in units of 128 ECC blocks as described above. Therefore, in this case, the system controller 9 performs the reproduction control by the third countermeasure method as described above, based on the linking position information.

At the same time, when the system controller 9 receives the information on 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. 34 and 36, 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. 34 to 36 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 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 the remaining storage capacity exceeds a predetermined lower limit capacity (empty) value, the data is read from the track buffer memory 7. 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, by continuing writing and reading to and from the track buffer memory 7, when the remaining storage capacity of the track buffer memory 7 reaches a predetermined upper limit capacity (full) value, 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, referring to FIGS. 34 to 36, the capacity management of the track buffer memory 7 and the writing / reading when reproducing a signal from the optical disc 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. 34 to 36 show how the writing / reading of the track buffer memory 7 is controlled, the writing / reading rate is changed, and the capacity is changed when the optical disk 1 is reproduced. FIG. 34 shows a case where the expansion rate in the AV encoding / decoding section 6 is 2 Mbps (the reading rate of the track buffer memory 7 is 2 Mbps).
Shows a case where the decompression rate (readout rate) is 4 Mbps, and FIG. 36 shows a case where the decompression rate (readout rate) is 8 Mbps.

In FIGS. 34 and 36, 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. 34 showing the case where the decompression rate (readout rate) is 2 Mbps, in period a, data is reproduced from the optical disk 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. 35 showing the case where the decompression 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 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. 36 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. 34 to 36, according to the present embodiment, when the data compressed and encoded by the AV encoding / decoding section 6 is reproduced and expanded from the optical disc 1, the AV code The decompression rate in the decoding / decoding section 6 (read rate of the track buffer memory 7) is 2 Mbps with respect to 10 Mbps which is the reproduction rate for the optical disc 1.
s, 4 Mbps, 8 Mbps
Continuous reproduction can be performed in the standby state (reproduction standby state from the optical disc 1) in the c period or the e and g periods by absorbing the time in the standby state.

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

[0276] 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 the above-mentioned information on the recording start address, the end address, and the linking position from the control data, and based on the information on the recording start address, the end address, and the linking position, performs linking. The position is managed, and the reproduction control by the third countermeasure is performed accordingly.

Here, when data such as a moving image via the ATAPI is recorded on the optical disc 1, the linking interval indicates that there is no linking sector (for example, linking interval “0”) as described above. Become. Therefore, in this case, the system controller 9
Reproduction control is performed so that all data sectors are reproduced in the same manner according to the 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) 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 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 capacity reaches a predetermined upper limit capacity (full), 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.

In this state, by continuing writing and reading to and from the track buffer memory 7, 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 a result, the data storage amount of the track buffer memory 7 gradually increases, and when the remaining storage capacity reaches the value of the upper limit capacity (full), the system controller 9 switches the interface unit 13 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 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, the information of the linking position extracted from the control data is, for example, 1 EC as described above.
This indicates that linking is performed in units of C blocks (for example, the linking interval is “1”).

Therefore, the system controller 9 at this time performs reproduction control for repeating reproduction for coping with linking in units of one ECC block.

In each of the embodiments of the present invention described above, one optical disk has been described as an example. However, an optical disk having two or more recording areas may be used.
Furthermore, there is a possibility that the device is properly used in a device having a plurality of disks.

Also, in each 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 structure of the optical disk device is described. However, the optical disk device according to each embodiment of the present invention may be a video camera using an optical disk as a recording medium, a portable type or It can be applied to various uses such as a stationary optical disk device.

In each embodiment, the track buffer memory 7 has a storage capacity of 64 Mbits.
For example, a D-RAM having a storage capacity of 256 Mbits can be used.

As is clear from the above description, according to the first embodiment of the present invention, when performing linking,
Link to the start and end addresses of the recording,
By recording the start address and end address, the linking interval between them, and other information in, for example, a management data area, stable reproduction without error or the like can be performed based on this information during reproduction. Making it feasible.

According to the present embodiment, a plurality of ECs
Linking is performed in the C block, and the plurality of Es
The CC block is composed of 2 Mbits or 4 Mbits in one unit based on the capacity of a track buffer 7 for temporarily storing a compressed signal of an image or an audio signal, the amount of data in a GOP or the like which is a compression unit in a DVD or the like. And

Further, according to the second embodiment of the present invention, by recording a flag indicating the linking position in a predetermined area in the ECC block, the flag is detected at the time of reproduction, and the flag is detected according to the linking position. Even if the ECC block to be linked is not known, the temporal position in the ECC block can be known, so that the linking positions of all ECC blocks may or may not be present. At (timing), similar processing is possible.

As described above, in each of the embodiments of the present invention, the recording medium can be used with the maximum use efficiency, and the occurrence of data errors at the time of reproduction can be prevented, and stable reproduction can be performed. It is.

The present invention is not limited to the above-described embodiment, and is not limited to a DVD, for example.
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.

[0298]

According to the recording medium of the first aspect of the present invention, when recording information of one piece of information using a plurality of blocks, a position at which this one piece of information is divided into a plurality of pieces is recorded. By providing a linking management area in which linking management information for managing the linking position information shown is recorded, and a control management area in which control information for managing the start position information of at least one piece of information is provided, data at the time of reproduction is provided. An error can be prevented, stable reproduction can be performed, and the consumption of the recording area of the recording medium can be reduced.

In the recording method according to the present invention, when recording information of one information using a plurality of blocks, linking indicating a position at which the one information is divided into a plurality of pieces and recorded. Generating linking management information for managing position information; generating control information for managing start position information of at least one piece of information; and storing the linking management information and the control information in a predetermined area of a recording medium. In this case, it is possible to prevent occurrence of a data error at the time of subsequent reproduction, enable stable reproduction, and further reduce consumption of the recording area of the recording medium.

In the recording apparatus according to the third aspect of the present invention, when recording information of one piece of information using a plurality of blocks, linking indicating a position where the one piece of information is divided into a plurality of pieces and recorded. Linking management information generating means for generating linking management information for managing position information, control information generating means for generating control information for managing start position information of at least the one piece of information, the linking management information and the control information, And recording means for recording the data in a predetermined area of the recording medium, thereby preventing occurrence of a data error at the time of subsequent reproduction, enabling stable reproduction, and further reducing consumption of the recording area of the recording medium. It is possible.

[0301] In the reproducing method according to the present invention, the control information for managing the start position information of the one information from a predetermined area of the recording medium on which the one information is recorded using a plurality of blocks is provided. Reproducing, from a predetermined area of the recording medium, reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded, and the reproduced linking management information. And reproducing the one piece of information on the basis of the control information and the control information, thereby preventing occurrence of a data error at the time of reproduction, enabling stable reproduction, and further consuming the recording area of the recording medium. Can be reduced.

[0302] According to a fifth aspect of the present invention, in the reproducing apparatus, the control information for managing start position information of the one piece of information from a predetermined area of the recording medium on which the one piece of information is recorded using a plurality of blocks. Control information reproducing means for reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded from a predetermined area of the recording medium. And, based on the reproduced linking management information and the control information, having a reproducing unit for reproducing the one information, it is possible to prevent occurrence of a data error at the time of reproduction, and to enable stable reproduction, Further, it is possible to reduce the consumption of the recording area of the recording medium.

A recording method according to a sixth aspect of the present invention includes a step of setting a recording mode for determining a storage amount for recording one piece of information in a predetermined time region, and a step of setting a recording mode in advance on a recording medium. Reading the address of the one piece of information from the recording start address to the recording end address of the one piece of information according to the recording mode. Recording, and recording control information for managing linking position information indicating the position of the linking and start position information of the one information, thereby causing a data error at the time of subsequent reproduction. Can be prevented, stable reproduction can be performed, and the consumption of the recording area of the recording medium can be reduced.

[0304] In the reproducing method according to the present invention, a step of reading a start position address of one piece of information recorded on a recording medium, and a step of linking where the position information is divided into a plurality of pieces and recorded. Reproducing a linking recording address corresponding to linking position information indicating a position; and reproducing the one information recorded using the linking recording address from the start position address to an end position address of the one information. By doing so, it is possible to prevent occurrence of a data error at the time of reproduction, enable stable reproduction, and further reduce consumption of a recording area of a recording medium.

According to the recording medium of the present invention, when one piece of information is recorded using a plurality of blocks,
A linking management area in which linking management information for managing linking position information indicating a position at which the one piece of information is divided and recorded; and flag information indicating validity / invalidity of the linking management information in the linking management area And a flag management area for managing the data, it is possible to prevent occurrence of a data error at the time of reproduction, enable stable reproduction, and have compatibility with already existing devices, and furthermore, It is possible to reduce the consumption of the recording area.

According to the recording method of the present invention, when recording one piece of information using a plurality of blocks,
Generating linking management information for managing linking position information indicating a position where the one piece of information is divided and recorded; generating flag information indicating validity / invalidity of the linking management information; Recording the management information and the flag information in a predetermined area of a recording medium, thereby preventing occurrence of a data error at the time of reproduction, enabling stable reproduction, and also allowing communication with already existing devices. It is compatible and can reduce the consumption of the recording area of the recording medium.

[0307] According to the recording apparatus of the present invention, when one piece of information is recorded using a plurality of blocks,
Linking management information generating means for generating linking management information for managing linking position information indicating a position where the one piece of information is divided and recorded; and a flag for generating flag information indicating validity / invalidity of the linking management information By having information generating means and recording means for recording the linking management information and the flag information in a predetermined area of a recording medium, it is possible to prevent occurrence of a data error at the time of reproduction, enabling stable reproduction, Further, it has compatibility with already existing devices, and can further reduce the consumption of the recording area of the recording medium.

[0308] In the reproducing method according to the present invention, the control information for managing the start position information of the one information from a predetermined area of the recording medium on which the one information is recorded using a plurality of blocks. Playing back linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded from a predetermined area of the recording medium; and A step of reproducing flag information indicating the validity / invalidity of the linking management, and a step of reproducing the one information when the flag information indicates validity. Occurrence can be prevented,
It enables stable reproduction, has compatibility with existing devices, and can reduce the consumption of the recording area of the recording medium.

[0309] According to a twelfth aspect of the present invention, there is provided the reproduction apparatus according to the present invention, wherein control information for managing start position information of one piece of information from a predetermined area of a recording medium on which one piece of information is recorded using a plurality of blocks Control information reproducing means for reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded from a predetermined area of the recording medium. Flag information reproducing means for reproducing flag information indicating validity / invalidity of the linking management from a predetermined area of the recording medium; and reproducing means for reproducing the one information when the flag information indicates validity. With this configuration, it is possible to prevent the occurrence of a data error at the time of reproduction, to enable stable reproduction, to have compatibility with already existing devices, and to record on a recording medium. It is possible to reduce the space consumption.

According to a thirteenth aspect of the present invention, there is provided a recording method, comprising: setting a recording mode for determining a storage amount for recording one piece of information within a predetermined time area; Reading the address of the one piece of information from the recording start address to the recording end address of the one piece of information according to the recording mode. Recording, linking position information indicating the linking position, and recording flag information indicating validity / invalidity of the linking position information, thereby preventing occurrence of a data error during reproduction; To enable stable playback, to be compatible with existing equipment, and to reduce the consumption of the recording area of the recording medium. Possible it is.

[0311] In the reproducing method according to the present invention, a step of reproducing a linking recording address corresponding to linking position information indicating a position where one piece of information is divided into a plurality of pieces by using a plurality of blocks and recorded. And reproducing flag information indicating validity / invalidity of the linking position information. When the flag information indicates validity, the linking recording address is used from a recording start address to a recording end address of the one information. And reproducing the one piece of information, thereby preventing occurrence of a data error at the time of reproduction, enabling stable reproduction, and having compatibility with already existing devices, and It is possible to reduce the consumption of the recording area.

[0312] According to the recording method of the present invention, a method of generating linking position information indicating a position at which one piece of information is divided into a plurality of pieces by using a plurality of blocks and a linking position of a previous linking position is used. A step of generating the new linking position information by shifting the new linking position information by a predetermined amount from the new linking position information; and a step of recording the new linking position information in a predetermined area of a recording medium, whereby a data error at the time of reproduction is achieved. Can be prevented, stable reproduction can be performed, the consumption of the recording area of the recording medium can be reduced, and the life of the recording medium can be prolonged.

[0313] According to the recording apparatus of the present invention, a method of generating linking position information indicating a position at which one piece of information is divided into a plurality of pieces by using a plurality of blocks and a recording position is used. Linking position information shifting means for generating the new linking position information by shifting the new linking position information by a predetermined amount from the previously recorded linking position information so as not to overlap with the new linking position information; Recording means for recording in a predetermined area, it is possible to prevent occurrence of a data error at the time of reproduction, enable stable reproduction, reduce consumption of the recording area of the recording medium, and It is possible to extend the life of the device.

[0314] According to the reproducing method of the present invention, when one piece of information is recorded using a plurality of blocks,
A step of reproducing a linking recording address corresponding to linking position information indicating a position at which the one piece of information is divided and recorded; a step of reproducing the one piece of information from a recording medium; and the linking recording address exists. Comparing the error of the one information reproduced from the block and the error of the one information reproduced from the block where the linking recording address does not exist over a plurality of blocks, based on a result of the comparison Determining the correlation between the linking position information and the occurrence of an error, thereby preventing occurrence of a data error at the time of reproduction, enabling stable reproduction, and consuming a recording area of a recording medium. And more reliable data can be obtained.

[0315] In the reproducing apparatus according to the present invention, when one piece of information is recorded using a plurality of blocks,
Linking recording address reproducing means for reproducing a linking recording address corresponding to linking position information indicating a position at which the one piece of information is divided into a plurality of pieces; recording means for reproducing the one piece of information from a recording medium; Error detecting means for detecting an error from the one information; an error of the one information reproduced from a block in which the linking recording address exists; and an error of the one information reproduced from a block in which the linking recording address does not exist. Comparing means for comparing with a plurality of blocks;
Based on the result of the comparison, by having a judgment means for judging the correlation between the linking position information and the occurrence of an error, it is possible to prevent the occurrence of a data error at the time of reproduction, enabling stable reproduction, It is possible to reduce the consumption of the recording area of the recording medium and obtain highly reliable data.

[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 used to explain the configuration and linking of an ECC block handled in the embodiment of the present invention.

FIG. 3 is a diagram used to explain a method of crushing one sector including a linking position as an example of a method for avoiding the effect of discontinuous recording.

FIG. 4 is a diagram showing an example of a method for avoiding the effect of discontinuous recording, which includes a linking position.
It is a figure used for description of the method of crushing all CC blocks.

FIG. 5 is a diagram basically used as an example of a method for avoiding the effect of discontinuous recording, which is a method for preventing loss of data including a linking position.

FIG. 6 is a diagram showing an example of information recorded in a management data area when information of a fixed linking interval is recorded as an example of information indicating a linking position recorded in a management data area of an optical disc.

FIG. 7 is a diagram illustrating an example of information recorded in a management data area when information of a variable linking interval is recorded as an example of information indicating a linking position recorded in a management data area of an optical disc.

FIG. 8 shows, as an example of information indicating a linking position recorded on an optical disc, whether or not linking position information is arranged for all ECC blocks on the optical disc, and a flag indicating whether or not the mapping is valid. It is a figure showing the example of information at the time of recording.

FIG. 9 is a diagram showing an example of a map when a linking bitmap is first recorded together with recording data.

FIG. 10 illustrates an example of a map when ordinary data is recorded without recording linking information in an area from I to L of an ECC block address in a state where a linking bit map is already recorded. FIG.

FIG. 11 shows a state where a linking bitmap exists at present (including a state where it is not known whether it exists).
FIG. 9 is a diagram illustrating an example of a map when normal data is recorded without recording linking information in an area from ECC block addresses E to L.

FIG. 12 is a diagram showing the configuration of field 4 of format 3 of recording management data.

FIG. 13 is a diagram showing a configuration of fields 5 to 12 of format 3 of recording management data.

FIG. 14 is a diagram showing a structure of a logical format recorded in a data management area of a DVD.

FIG. 15 is a diagram showing a structure of a video manager.

FIG. 16 is a diagram showing information described in a title search pointer table.

FIG. 17 is a diagram showing information described in a volume management information management table.

FIG. 18 is a diagram showing a structure of a video title set.

FIG. 19 is a diagram showing a structure of a video object set in a video title set.

FIG. 20 is a diagram showing a structure of a navigation pack.

FIG. 21 is a diagram illustrating a structure of a video, audio, and sub-picture pack.

FIG. 22 is a diagram showing logical addresses described in a navigation pack.

FIG. 23 is a diagram showing a data structure of data search information (DSI) in the navigation pack.

FIG. 24 is a block diagram showing a configuration of a main part when realizing a third countermeasure in the optical disc device according to the first embodiment of the present invention.

FIG. 25 is a waveform diagram used to explain a linking timing signal for extracting a signal section corresponding to a linking position from a reproduced RF signal.

FIG. 26 shows 14T or 14T + 3T included in a reproduction signal
FIG. 4 is a waveform diagram used for explaining a sync pattern, a sync window for detecting the sync pattern, and a sync detection signal.

FIG. 27 is a block diagram showing a specific configuration example of a sync detector capable of increasing the width of a sync window at a ringing position.

FIG. 28 is a block diagram showing a configuration of a main part when realizing a third countermeasure in the optical disc device according to the second embodiment of the present invention.

FIG. 29 is a diagram used to explain the difference in the number of errors depending on the presence or absence of ringing.

FIG. 30 is a block diagram illustrating a schematic configuration of an optical disc device according to a third embodiment of the present invention.

FIG. 31 is a conceptual diagram conceptually showing buffer control when writing / reading data compressed at 2 Mbps to a track buffer memory at the time of recording.

FIG. 32 is a conceptual diagram conceptually showing buffer control when writing / reading data compressed at 4 Mbps to a track buffer memory at the time of recording.

FIG. 33 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data that has been MPEG-compressed at 8 Mbps to a track buffer memory during recording.

FIG. 34 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data compressed at 2 Mbps to a track buffer memory at the time of reproduction.

FIG. 35 is a conceptual diagram conceptually showing a state of buffer control when writing / reading data compressed at 4 Mbps to a track buffer memory during playback.

FIG. 36 is a conceptual diagram conceptually showing buffer control when writing / reading data compressed at 8 Mbps to a track buffer memory during reproduction.

[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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04N 5/92 H04N 5/92 HF term (reference) 5C053 FA02 FA14 FA24 FA25 FA27 GA11 GB01 GB05 GB15 GB21 HA29 JA03 JA07 JA21 KA05 KA21 KA24 LA11 5D044 AB05 AB07 BC03 BC06 CC04 DE03 DE12 DE24 DE43 DE44 DE49 DE54 DE66 DE68 GK07 GK12 5D077 AA28 AA30 CA02 DC10 DC23 DC37 EA33 EA34 5D110 AA15 AA17 DA01 DB13 DB17 DC05 DE06

Claims (18)

[Claims] When recording information of one piece of information using a plurality of blocks, linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded is recorded. A recording medium comprising: a linking management area; and a control management area in which control information for managing at least the start position information of the one piece of information is recorded. 2. A step of generating linking management information for managing linking position information indicating a position where one piece of information is divided into a plurality of pieces and recorded, when recording information of one piece of information using a plurality of blocks. Generating control information for managing start position information of at least one piece of information; and recording the linking management information and the control information in a predetermined area of a recording medium. Recording method. 3. Linking for generating linking management information for managing linking position information indicating a position where one piece of information is divided into a plurality of pieces and recorded when a plurality of blocks are used to record one piece of information. Management information generating means; control information generating means for generating control information for managing at least the start position information of the one piece of information; recording means for recording the linking management information and the control information in a predetermined area of a recording medium A recording apparatus comprising: 4. A step of reproducing control information for managing start position information of the one piece of information from a predetermined area of the recording medium on which one piece of information is recorded by using a plurality of blocks; Reproducing the linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces, and based on the reproduced linking management information and the control information. Reproducing the information. 5. A control information reproducing means for reproducing control information for managing start position information of the one information from a predetermined area of the recording medium on which the one information is recorded using a plurality of blocks; Linking management information reproducing means for reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded, and the reproduced linking management information and the control information. And a reproducing means for reproducing the one piece of information. 6. A step of setting a recording mode for determining a storage amount for recording one piece of information within a predetermined time area; a step of reading an address recorded in a recording medium in advance; Accordingly, recording the one piece of information while performing linking for dividing the one piece of information into a plurality of pieces from a recording start address to a recording end address of the one piece of information, and linking indicating a position of the linking. Recording a position information and control information for managing start position information of the one piece of information. 7. A step of reading a start position address of one piece of information recorded on a recording medium, and a linking recording address corresponding to linking position information indicating a linking position where the position information is divided into a plurality of pieces and recorded. Reproducing the one information recorded from the start position address to the end position address of the one information by using the linking recording address. . 8. When linking one piece of information using a plurality of blocks, linking management information in which linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded is recorded. A recording medium comprising: an area; and a flag management area for managing flag information indicating whether the linking management information is valid / invalid in the linking management area. 9. When linking one piece of information using a plurality of blocks, generating linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded; A recording method, comprising: generating flag information indicating validity / invalidity of the linking management information; and recording the linking management information and the flag information in a predetermined area of a recording medium. 10. When linking one piece of information using a plurality of blocks, linking management information for generating linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded. Generating means; flag information generating means for generating flag information indicating validity / invalidity of the linking management information; and recording means for recording the linking management information and the flag information in a predetermined area of a recording medium. A recording device characterized by the above-mentioned. 11. A step of reproducing control information for managing start position information of one piece of information from a predetermined area of a recording medium on which one piece of information is recorded by using a plurality of blocks; Reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded; and determining whether the linking management is valid / invalid from a predetermined area of the recording medium. And reproducing the flag information when the flag information indicates validity. 12. A control information reproducing means for reproducing, from a predetermined area of a recording medium on which one piece of information is recorded using a plurality of blocks, control information for managing start position information of said one piece of information, said recording medium From a predetermined area, linking management information reproducing means for reproducing linking management information for managing linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded, and from a predetermined area of the recording medium, A reproducing apparatus comprising: flag information reproducing means for reproducing flag information indicating validity / invalidity of linking management; and reproducing means for reproducing the one information when the flag information indicates validity. 13. A method for setting a recording mode for determining a storage amount for recording one piece of information within a predetermined time area; a step of reading an address recorded in advance on a recording medium; Accordingly, recording the one piece of information while performing linking for dividing the one piece of information into a plurality of pieces from a recording start address to a recording end address of the one piece of information, and linking indicating a position of the linking. Recording a position information and flag information indicating validity / invalidity of the linking position information. 14. A step of reproducing a linking recording address corresponding to linking position information indicating a position where one piece of information is divided into a plurality of pieces and recorded using a plurality of blocks, and indicating whether the linking position information is valid or invalid. Reproducing the flag information; and, when the flag information indicates valid, from the recording start address to the recording end address of the one information, reproducing the one information using the linking recording address. A reproduction method characterized by the above-mentioned. 15. A method for generating linking position information indicating a position at which one piece of information is divided into a plurality of blocks and recorded using a plurality of blocks, wherein the new linking position information is shifted by a predetermined amount from a previous linking position and new linking position information. Generating a new linking position information; and recording the new linking position information in a predetermined area of a recording medium. 16. A method for generating linking position information indicating a position at which one piece of information is divided into a plurality of blocks and recorded using a plurality of blocks so that a previous linking position and a new linking position do not overlap with each other. Linking position information shifting means for generating the new linking position information shifted by a predetermined amount from recorded linking position information, and recording means for recording the new linking position information in a predetermined area of a recording medium A recording device characterized by the above-mentioned. 17. When recording one piece of information by using a plurality of blocks, reproducing a linking recording address corresponding to linking position information indicating a position where the one piece of information is divided into a plurality of pieces and recorded. Reproducing the one information from a recording medium; an error of the one information reproduced from a block where the linking recording address exists; and an error of the one information reproduced from a block where the linking recording address does not exist. A step of performing the comparison over a plurality of blocks; and determining a correlation between the linking position information and the occurrence of an error based on a result of the comparison. 18. A linking recording address for reproducing a linking recording address corresponding to linking position information indicating a position at which one piece of information is divided into a plurality of pieces when recording one piece of information using a plurality of blocks. A reproducing unit that reproduces the one piece of information from a recording medium; an error detecting unit that detects an error from the one piece of reproduced information; Comparing means for comparing the error with the error of the one information reproduced from the block where the linking recording address does not exist, over a plurality of blocks; based on the result of the comparison, the linking position information and the error A playback device comprising: determination means for determining a correlation with occurrence.