JPH05198087A - Disk recording device, disk reproduction device, and disk - Google Patents

Abstract

PURPOSE:To divide and record recording data in plural areas by recording free area information, start area information, end area information, continuous reproduction information, and coupling address information as table data in a read-in area. CONSTITUTION:The area information, start area information, end area information, continuous reproduction information, and coupling address information are recorded as the table data in the read-in area A22 of an optical disk 1. The free area information indicates that a data recording area A21 is a free area and the start area information shows that the recording data in the area A21 is the start of a series of recording data. The end area information indicates that the recording data is the end of the series of recording data and the continuous reproduction information indicates the reproduction of recording data in a next successive cluster. Further, the coupling address information enables coupling even if a series of data indicating the coupling destination of another data recording area from one area A21 is divided and recorded in plural areas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus which records a predetermined number of plural sectors as one cluster and records recording data for each cluster, and a disk which reproduces the recording data recorded by this disk recording apparatus. The present invention relates to a reproducing device and a disc used in the disc recording device and the disc reproducing device.

[0002]

2. Description of the Related Art An optical disc can have a recording capacity larger than that of a magnetic disc by about two to three digits and can be accessed at a higher speed than a tape-shaped recording medium. In addition, since data can be recorded / reproduced in a non-contact manner with respect to the medium and the durability is excellent, it has been widely used in recent years. The so-called CD (compact disc) is most widely known as the optical disc.

In the above CD, a 24-bit synchronizing signal provided as EFM (Eight to Fourteen Modulation) data obtained by converting an 8-bit signal of 1 symbol into 14-bit (1 channel bit) data, 14-bit (1 symbol) Subcode and 14 × 32 bits (32
Data format such as performance information (symbol) and parity, and 588 bits each consisting of 3 bits of margin bits provided between each symbol as one frame, and a 98-bit frame as a sub-code block. There is. The absolute address of the one sub-code block is given by the sub-channel signal of the Q-channel of the sub-codes, and data processing is performed on the data such as performance information in units of the one sub-code block. The CD has a lead-in area on the inner peripheral side of the data recording area in which performance information and the like are recorded. The lead-in area has a table of contents (TOC) indicating the recording position of the data recording area.
As data, the time code indicating the start position of the song, the song numbers of the first song and the last song of the disc, the song number of the last song, and the time code indicating the ending position of the last song are sequentially recorded. , Sub-coded and recorded as the Q-channel sub-code signal.

In the CD-I (CD-interactive) format, the levels shown in Table 1 below are defined as modes for recording / reproducing a bit-compressed digital audio signal.

[0005]

[Table 1]

In Table 1, for example, when a disc recorded in the level B mode is reproduced, a signal obtained by bit-compressing a standard CD-DA format digital signal by about 4 times is reproduced. Therefore, for example, when all of the recorded data are stereo audio compression data, the reproduction can be performed for about four times as long (or for four channels), and even for an optical disc with a diameter of about 8 cm or less, about 70 minutes is required. Recording and reproduction becomes possible.

By the way, using an optical disc for portable use,
In particular, in the case of providing a so-called pocket-sized headphone stereo device or a recording and / or reproducing device similar to it, for example, in the existing CDs described above, those having a disk diameter of 12 cm and a disk diameter of 8 cm ( Although a so-called CD single) is standardized in terms of format, a disk with a diameter of 12 cm uses a disk with a diameter of 8 cm or smaller because the external dimensions of the recording / reproducing device become too large and portability is poor. It is possible. However, when an attempt is made to construct a portable or pocket-sized recording and / or reproducing apparatus using the optical disk having a small diameter of about 8 cm or less, there are the following problems.

First, a standard CD is provided in which an optical disc on which a 16-bit-quantized stereo digital PCM audio signal having a sampling frequency of 44.1 kHz is recorded is supplied from the manufacturer side and only reproduction is performed on the user side. In the format (CD-DA format), the reproduction time (recording time) of a disc having a diameter of 8 cm is as short as about 20 minutes to 22 minutes at the maximum, and one classical music symphony cannot be recorded. It is desired that the reproduction time be about 74 minutes at maximum, which is the same as the current 12 cm CD. Moreover, in this CD-DA format, recording cannot be performed on the user side. Further, since the non-contact optical pickup device is vulnerable to mechanical vibration and the like, and track deviation or focus deviation easily occurs due to vibration or the like, when carrying the device, a reproducing operation due to these track deviation or focus deviation is caused. Some strong measures are needed to limit the negative impact on

Next, the standard CD format (C
C as an extended format of D-DA format)
In the D-MO format (format in which a recordable magneto-optical disk is used), the recording / reproducing time of the disk having a diameter of 8 cm is 2 as in the CD-DA format.
It is about 0 to 22 minutes and has a shortcoming that it is short. Also, track deviation and focus deviation of the optical pickup device are likely to occur due to mechanical vibrations, etc.
Measures are required to prevent adverse effects on the reproduction operation.

By the way, in the CD-I format, since the disc is rotationally driven at the same linear velocity as the standard CD-DA format, continuous audio compressed data is recorded for every n units of recording units on the disc. It will be reproduced at the unit rate. This unit is called a block or a sector, and one block (sector) has 98 frames and the cycle is 1/75 second. n is a numerical value according to the reproduction time or the bit compression rate of the data, and for example, in the level B stereo mode, n = 4. Therefore, in this level B stereo mode, one sector per four sectors, such as SDDDDDSDDDD ... (where S is an audio sector and D is another data sector) That is, the data string in which is the audio sector is recorded on the disc. However, at the time of actual recording, the above data string is
Since a predetermined encoding process (error correction coding process and interleave process) similar to that for normal CD format audio data is performed, the data of the audio sector S and the data of the data sector D are recorded in the recording sector on the disc. And will be distributed and arranged.
Here, for example, video data, computer data, or the like is used as the other data sector D. When a bit-compressed audio signal is also used as the data sector D, audio sectors S1 to S4 for four channels are used. A data string in which S4 is sequentially cyclically arranged [S1,
S2, S3, S4, S1, S2, S3, S4 ...] are encoded and recorded on the disc.

When recording and reproducing a continuous audio signal, the above-mentioned 4-channel audio signals are used by connecting them from the first channel to the fourth channel sequentially. At this time, after the data of the first channel corresponding to the audio sector S1 is reproduced from the innermost disc to the outermost disc, the disc is returned to the innermost disc again and the data of the second channel corresponding to the audio sector S2 is reproduced. The data of the third channel corresponding to the innermost circumference of the disc and the next audio sector S3 is again reproduced to the outermost circumference, and finally the innermost circumference of the disc corresponds to the remaining audio sectors S4 again. By reproducing the data of the fourth channel to the outermost circumference, continuous four-time reproduction is performed.

However, during the continuous reproduction as described above, a long-distance track jump operation for returning from the outermost circumference to the innermost circumference is required several times, and this track jump operation cannot be performed instantaneously. There is a big problem that the playback data is lost and the playback sound is interrupted. In addition, when a continuous audio signal is to be recorded, due to the interleave processing during recording, for example, the sector S
It is not possible to record only the 2nd signal alone, and interleaving including the data of the adjacent sectors S1 and S3 or the peripheral sector is necessary, and the signal of the already recorded sector can be rewritten. Is required. Therefore, it is very difficult to record such continuous compressed audio data.

[0013]

By the way, the conventional CD
In the -MO format, like the standard CD-DA format described above, the TOC information is defined to record the start address and the end address. Conventionally, in the CD-MO system, since memory control is not premised, information is lost when accessing a discontinuous area. Therefore, the recording area is always a continuous area as a condition for the above recording. It was limited. As described above, in the conventional CD-MO format, since it is not possible to divide one series of recording data and record it in a plurality of areas, for example, when a certain recorded track is erased and then recorded again, There is a problem in that, when performing editing work, recording can be performed only in one continuous free area. For example, as shown in FIG. 14, assuming a magneto-optical disk having a recording area in which a recording time of 60 minutes is secured, the first performance information is recorded in the data recording area D ₁ from 0 minutes to 15 minutes. At the same time, the second performance information is recorded in the data recording area D ₃ from 30 minutes to 45 minutes, and the data recording area D ₂ from 15 minutes to 30 minutes and the data recording area D ₄ from 45 minutes to 60 minutes. Is not recorded,
In the lead-in area, as shown in FIG. 15, a track indicating the first performance information as information indicating that the first performance information is recorded in the data recording area D ₁ from 0 to 15 minutes. Number information “1”, recording start information “0”, and recording start position information “00 minutes 00 seconds 00 frames”,
Track number information "1" indicating the first performance information, recording end information "0", and recording start position information "15 minutes 04 seconds 00"
"Frame" is recorded, and the second performance information is 3
As information indicating that the data is recorded in the data recording area D ₃ from 0 minutes to 45 minutes, track number information “2” indicating the second performance information, recording start information “0”, and recording start position information “30 minutes 00 seconds 06 frames ", track number information" 2 "indicating the first performance information, recording end information" 0 ", and recording start position information" 45 minutes 00 seconds 00 frames "are recorded. When the third performance information is newly recorded on the magneto-optical disk, it cannot be recorded over the vacant data recording area D ₂ and the data recording area D ₄ , and the data recording area D ₂ Alternatively, the data can be recorded only within the recording capacity of the data recording area D ₄ .

Therefore, the present invention has been made in view of the above situation, and provides a disk recording apparatus capable of dividing a series of recording data and recording the divided data in a plurality of data recording areas. .. Further, the present invention provides a disc recording device capable of reproducing the above-mentioned series of record data from a plurality of data recording areas in which a series of record data is divided and recorded.

Further, the present invention provides a disc in which a series of recording data is divided and recorded in a plurality of data recording areas, and the series of recording data is reproduced from these data recording areas.

[0016]

DISCLOSURE OF THE INVENTION A disk recording apparatus according to the present invention sets a predetermined number of plural sectors as one cluster, records recording data in a data recording area for each cluster, and records in the data recording area. A disk recording device for recording catalog data indicating contents in a lead-in area, wherein data recording means for recording recording data for each cluster in the data recording area, and the data recording area are empty areas. Free space information indicating that there is,
Start area information indicating that the recording data recorded in the data recording area is the start of a series of recording data, and end indicating that the recording data recorded in the data recording area is the end of a series of recording data. The area information, the continuous reproduction information for instructing the reproduction of the recording data of the next continuous cluster, and the connection address information indicating the connection destination from the data recording area to another data recording area are used as the list data and the lead-in information. The above-mentioned problem is solved by providing lead-in information recording means for recording in an area.

Further, the disc reproducing apparatus according to the present invention,
A predetermined number of plural sectors are set as one cluster, and the recording data is recorded in the data recording area for each cluster, and free area information indicating that the data recording area is a free area and the data recording area are recorded. The recording data recorded is continuous with start area information indicating that the recording data is the start of a series of recording data, and the end area information indicating that the recording data recorded in the data recording area is the end of the series of recording data. The lead-in area of the disc in which the continuous reproduction information for instructing the reproduction of the recorded data of the next cluster and the combined address information indicating the connection destination from the data recording area to another data recording area are recorded in the lead-in area. From the above free area information, start area information, end area information,
Based on the lead-in information reproducing means for reproducing the continuous reproduction information and the combined address information, and the empty area information, the start area information, the end area information, the continuous reproduction information and the combined address information reproduced by the lead-in information reproducing means. ,
The above problem is solved by providing a data reproducing means for reproducing recorded data from a data recording area on the disc.

Further, in the disc according to the present invention, a predetermined number of plural sectors are set as one cluster, and the data recording area in which the recording data is recorded and the data recording area are free areas. The free area information, the start area information indicating that the recording data recorded in the data recording area is the start of a series of recording data, and the recording data recorded in the data recording area is the end of the series of recording data. The end area information indicating that there is such information, the continuous reproduction information for instructing the reproduction of the recording data of the next continuous cluster, and the connection address information indicating the connection destination from the data recording area to another data recording area are recorded. And a lead-in area.

[0019]

In the disk recording apparatus according to the present invention, the data recording means records the recording data for each cluster in the data recording area, and the lead-in information recording means makes the data recording area empty. The free area information indicating that the recording data recorded in the data recording area is the start of a series of recording data, and the recording data recorded in the data recording area is a series of recording data. End area information indicating the end, continuous reproduction information for instructing reproduction of the record data of the next continuous cluster, and combined address information indicating a connection destination from the data recording area to another data recording area are included. It is recorded in the lead-in area as inventory data.

Further, in the disc reproducing apparatus according to the present invention, the lead-in information reproducing means makes a series of free area information indicating that the data recording area is a free area and the record data recorded in the data recording area. Area information indicating that the recording data recorded in the data recording area is the end area information indicating that the recording data recorded in the data recording area is the end of a series of recording data, and the recording data of the next continuous cluster. Continuous playback information to instruct playback of
Coupling address information indicating the coupling destination from that data recording area to another data recording area and the free area information, start area information, end area information, continuous reproduction from the lead-in area of the disc recorded in the lead-in area The information and the combined address information are reproduced, and a predetermined number of plural sectors are set as one cluster by the data reproducing means on the basis of each of the above information, and the record data recorded in the data recording area is reproduced for each cluster.

Further, in the disk according to the present invention, a predetermined number of plural sectors are set as one cluster in the data recording area, the recording data is recorded for each cluster, and the lead-in area has an empty area for the data recording area. The free area information indicating that the recording data recorded in the data recording area is the start of a series of recording data, and the recording data recorded in the data recording area is a series of End area information indicating the end of the recorded data, continuous reproduction information for instructing reproduction of the recorded data of the next continuous cluster, and a connection address indicating a connection destination from the data recording area to another data recording area Record information and.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a disk recording apparatus, a disk reproducing apparatus and a disk according to the present invention will be described below with reference to the drawings. The disc recording device, the disc reproducing device, and the disc according to the present invention can be integrated into one device, for example, the disc recording and reproducing device shown in FIG.

The disc recording / reproducing apparatus shown in FIG.
An optical disc 1 which is a disc, audio data which is recording data on the optical disc 1, and catalog data (a so-called TOC (Tabl (Tabl)
Recording / playback system 2 for recording / playback of (e of Contents) data)
And a display unit 3 for displaying the absolute time of the audio data recorded on the optical disc 1 and the length of a free area, which will be described later, and a key for designating recording and reproduction of the audio data. It comprises a keyboard 4 and a system controller 5 which is a control means.

The optical disc 1 has, for example, as shown in FIG. 2, a reproduction-only area A ₁₀ and a recording / reproduction area A ₂₀ provided outside the reproduction-only area A ₁₀ . The reproduction-only area A ₁₀ is an area in which desired data is recorded by the manufacturer, and includes a data recording area A ₁₁ in which data such as performance information is recorded, and a lead-in area A ₁₂ provided on the inner peripheral side thereof. have. In the reproduction-only area A ₁₀ , digital data is recorded as the presence or absence of pits corresponding to “1” and “0”. In addition, the lead-in area A
_{In the 12} , recording start address information and recording end address information are recorded in order for all performance information as TOC data indicating the recording position and recording content of the data recording area A ₁₁ .

The recording / reproducing area A ₂₀ of the optical disc 1 is
A magneto-optical recording area for the user to arbitrarily rewrite data, a data recording area A ₂₁ in which data such as performance information is recorded, and a lead-in area A ₂₂ provided on the inner peripheral side thereof. have.

In the disk recording / reproducing apparatus according to the present embodiment, recording of each data in the reproduction-only area A ₁₀ and the recording / reproduction area A ₂₀ is performed for each cluster.
As shown in FIG. 3, one cluster is composed of main data of 32 sectors, linking of three sectors, and sub data of one sector, for a total of 36 sectors. In the lead-in area A ₂₂ , free area information indicating that the data recording area A ₂₁ is a free area and the audio data recorded in the data recording area A ₂₁ are the start of a series of audio data. Indicating start area information, end area information indicating that the audio data recorded in the data recording area A ₂₁ is the end of a series of recorded data, and continuous indicating the reproduction of the audio data of the next continuous cluster. TOC data indicating reproduction information and combined address information indicating a connection destination from the data recording area to another data recording area is recorded.

The recording / reproducing system 2 digitizes an audio signal from the LPF 10 and a low-pass filter (LPF) 10 to which an audio signal which is an analog signal to be recorded on the optical disc 1 is supplied through an input terminal 7. A / D converter 11 for forming audio data, and the A / D converter 1
The audio data from 1 will be described later in ATRAC (Adapti
VE Transform Acoustic Coding) encoding processing ATRAC encoder 12, RAM 13 that temporarily stores the ATRAC encoded audio data, encoder 14 that performs EFM encoding processing and the like on the audio data read from RAM 13. The magnetic head drive circuit 15 forms a modulation magnetic field according to the audio data from the encoder 14, and the magnetic head 16 applies a modulation magnetic field to the optical disc 1 according to the modulation magnetic field from the magnetic head drive circuit 15. ing.

The recording / reproducing system 2 includes a spindle motor 17 for rotationally driving the optical disc 1 at a constant angular velocity or a constant linear velocity, an optical head 18 for irradiating the optical disc 1 with a laser beam, and the optical head 18. An RF circuit 19 that extracts and outputs a focus error signal or a tracking error signal from the output, and the spindle motor 17 and the optical head 1 according to the focus error signal or the tracking error signal from the RF circuit 19.
8, a decoder 21 for performing EFM decoding processing on the output from the optical head 18 via the RF circuit 19, and a RAM 22 for temporarily storing the audio data decoded by the decoder 21. An ATRAC decoder 23 that performs ATRAC decoding processing on the audio data read from the RAM 22, and the AT
A D / A converter 24 that analogizes the audio data from the RAC decoder 23 to form an audio signal, an LPF 25 that removes and outputs high frequency components from the audio signal from the D / A converter 24, and the ATRAC decoder 23. And a digital output circuit 26 that directly outputs the audio data from the.

The system controller 5, LP
F10~RF constitute a data recording means for recording audio data in the data recording area A ₂₁ of the optical disc 1 by the amplifier 19 and the servo control circuit 21. Further, the system controller 5, the TOC memory 27, the magnetic head drive circuit 15, the magnetic head 16 and the optical head 18 constitute a lead-in information recording means for recording the TOC data in the lead-in area A ₂₂ . ..

Further, the system controller 5, the optical head 18 to the digital output circuit 26 constitute a data reproducing means for reproducing the audio data recorded in the data recording area A ₂₁ . In addition, the system controller 5,
The optical head 18 and the TOC memory 27 constitute a lead-in information reproducing means.

Next, the operation of the disc recording / reproducing apparatus according to the present embodiment in the recording mode for recording desired audio data in the recording / reproducing area A ₂₀ of the optical disc 1 will be described. This recording mode is designated by the keyboard 4 shown in FIG.
This is done by turning on the recording key provided in the. When the recording key is turned on, the spindle motor 17 rotationally drives the optical disc 1 so that the angular velocity is constant or the linear velocity is constant.
A desired audio signal which is an analog signal is supplied to the A / D converter 11 via the input terminal 7 and the LPF 10.
The spindle motor 17 is controlled by the servo control circuit 20 so as to always rotate constantly.

The A / D converter 11 quantizes the audio signal and 2CH × 16 bit × 44.1 kHz≈1.
Voice data having a data rate of 4 Mbit / sec is formed and supplied to the ATRAC encoder 12.

The ATRAC encoder 12 quantizes the audio signal by the A / D converter 11 to obtain 1.4.
For voice data with a data rate of Mbit / sec, a maximum of about 20 msec data is set as one block,
The waveform on the time axis is analyzed by so-called orthogonal transformation into about 1,000 components on the frequency axis, and the frequency components that are important for hearing are extracted in order to form audio data at a data rate of 300 kbit / sec. That is, the above 1.4 Mbi
1/5 of audio data with a data rate of t / sec is 30
A process of compressing audio data (hereinafter referred to as compressed data) having a data rate of 0 kbit / sec is performed, and the data transfer rate is converted from 75 sectors / sec in the standard CD-DA format to 15 sectors / sec. This compressed data is supplied to the RAM 13.

The RAM 13 is controlled by the system controller 5 to write and read data, and is used as a buffer memory for temporarily storing the compressed data supplied from the ATRAC encoder 12. That is, the above ATRAC
The compressed data supplied from the encoder 12 has its data transfer rate reduced to ⅕ of the standard data transfer rate of 75 sectors / second, that is, 15 sectors / second, and this compressed data is stored in the RAM 13. It is written continuously. It is sufficient for this compressed data to record one sector for every five sectors, but such recording for every five sectors is practically impossible. Therefore, continuous sector recording as described later is performed. In this recording, a cluster consisting of a predetermined plurality of sectors (for example, 32 sectors + several sectors) is used as a recording unit, and 75 sectors /
It is performed in bursts at a data transfer rate of seconds. That is, in the RAM 13, compressed data continuously written at a low transfer rate of 15 (= 75/5) sectors / second corresponding to the bit compression rate is read out in bursts at the transfer rate of 75 sectors / second. Be done. The overall data transfer rate of the read and recorded data, including the recording pause period, is as low as the above-mentioned 15 sectors / second, but within the time of the burst recording operation. The instantaneous data transfer rate is 75 sectors / sec.

The compressed data read out in bursts from the RAM 13 at the transfer rate of 75 sectors / second is supplied to the encoder 14.

The encoder 14 performs coding processing (parity addition and interleaving processing) for error correction, EFM coding processing, etc. on the compressed data supplied in burst from the RAM 13 as described above.
The recording data encoded by the encoder 14 is supplied to the magnetic head drive circuit 15. The magnetic head drive circuit 15 drives the magnetic head 16 so as to apply a magnetic field modulation according to the compressed data to the optical disc 1.

On the other hand, the system controller 5 performs the above-mentioned memory control on the RAM 13, and the compressed data read in burst from the RAM 13 by this memory control is continuously recorded on the recording track of the optical disc 1. The recording position is controlled so that the recording is performed manually. The control of the recording position manages the recording position of the compressed data which is burst-read from the RAM 13 by the system controller 5, and controls the servo control of the control signal for designating the recording position on the recording track of the optical disc 1. This is done by supplying to the circuit 20.

That is, in this disc recording / reproducing apparatus, the audio data output from the A / D converter 11 has a sampling frequency of 44.1 kHz, a quantization bit number of 16 bits, and a data transfer rate of 74 sectors / second. Of the audio PCM data. This is the above ATRA
The data transfer rate is 1 when it is supplied to the C encoder 12.
It is output as compressed data of 15 sectors / second of / 5. The compressed data continuously output from the ATRAC encoder 12 at a transfer rate of 15 sectors / second is the RA
It is supplied to M13.

Then, the system controller 5 is
As shown in FIG. 4, by continuously incrementing the write pointer W of the RAM 13 at a transfer rate of 15 sectors / second, the compressed data can be stored in the RAM 13 by 15 times.
The RAM 1 is continuously written at a transfer rate of sector / second.
When the data amount of the compressed data stored in the RAM 3 becomes a predetermined amount K or more, the read pointer R of the RAM 13 is burst-wise incremented at a transfer rate of 75 sectors / second, and the compressed data is read from the RAM 13. Predetermined amount K
Only, memory control is performed so as to read in bursts at the transfer rate of 75 sectors / sec.

By the memory control by the system controller 5 as described above, the ATRAC encoder 1 is
RAM 1 at a transfer rate of 2 to 15 sectors / second, for example
When the data amount of the compressed data stored in the RAM 13 exceeds a predetermined amount K, the R
Since the compressed data is read from the AM 13 as recording data by a predetermined amount K in a burst manner at a transfer rate of 75 sectors / second, the input data can be stored in the RAM 13 while always ensuring a data writing region of a predetermined amount or more. The data can be continuously written in the RAM 13.

Here, the recording data read out in burst from the RAM 13 is in a continuous state on the recording track of the optical disc 1 by controlling the recording position on the recording track of the optical disc 1 by the system controller 5. Can be recorded in. Moreover,
As described above, since the RAM 13 always has a data writing area of a predetermined amount or more, the system controller 5 detects that a track jump or the like has occurred due to a disturbance or the like, and interrupts the recording operation on the optical disc 1. Even in such a case, the input data can be continuously written in the data writing area of the predetermined amount or more, and the recovery processing operation can be performed during that time, and the input data can be continuously recorded on the recording track of the optical disc 1. ..

The optical head 18 is, for example, as shown in FIG. 5, a laser light source 31 such as a laser diode, a collimator lens 32, a beam splitter 33, and an objective lens 3.
4, optical components such as the polarization beam splitter 35, first and second photodetectors 36 and 37 for detecting the light separated by the polarization beam splitter 35, and addition and synthesis of respective detection outputs of these photodetectors 36 and 37. It is composed of a single signal synthesizer 38, a first signal synthesizer 39 for subtracting and synthesizing the respective detection outputs, and the like, and is provided at a position facing the magnetic head 16 with the optical disk 1 in between.

The optical head 18 is used for the optical disc 1 described above.
When data is recorded in the recording / reproducing area A ₂₀ , the magnetic head drive circuit 15 drives the magnetic head 16 to irradiate a target track of the optical disc 1 to which a modulation magnetic field according to the recording data is applied. Data recording is performed by thermomagnetic recording. It should be noted that the optical head 18 detects a focus error by a so-called astigmatism method, for example, by detecting the reflected light of the laser light applied to the target track in the recording mode and the reproducing mode described later. The tracking error is detected by the so-called push-pull method.

The changeover switch 40 provided on the optical head 18 is controlled to be changed over by the system controller 5, and in the recording mode, it is controlled so as to select the selected terminal 40c by the selection terminal 40a. It As a result, in this recording mode,
The combined signal from the first signal combiner 38 obtained by adding and combining the detection outputs from the photodetectors 36 and 37 is shown in FIG.
Is supplied to the RF circuit 19 shown in FIG.

The RF circuit 19 includes the optical head 18
The focus error signal and the tracking error signal are extracted from the output of the above and supplied to the servo control circuit 20, and the reproduced signal is binarized and supplied to the decoder 21 described later.

The servo control circuit 20 is composed of, for example, a focus servo control circuit, a tracking servo control circuit, a spindle motor servo control circuit, a sled servo control circuit and the like. The focus servo control circuit controls the focus of the optical system of the optical head 18 so that the focus error signal becomes zero. The tracking servo control circuit controls the tracking of the optical system of the optical head 18 so that the tracking error signal becomes zero. Further, the spindle motor servo control circuit controls the spindle motor 17 so that the optical disc 1 is rotationally driven at the constant angular velocity or the constant linear velocity. Further, the sled servo control circuit moves the optical head 18 and the magnetic head 16 to the target track position of the optical disc 1 designated by the system controller 5.

The servo control circuit 20 performing such various control operations supplies the system controller 5 with information indicating the operating state of each part controlled by the servo control circuit 20.

The system controller 5 controls each of the control circuits in accordance with information indicating the operating state of each of the above-mentioned units, so that the optical head 18 and the magnetic head 16 are controlled.
Manages the recording position on the recording track that is being traced, and also manages the reproducing position on the recording track in the reproduction mode and the edit mode described later.

The system controller 5 automatically forms, in the TOC memory 27, the TOC data table including the TOC data in the data recording area A ₂₁ of the recording / reproducing area A ₂₀ during the recording of the audio data. Then
At the same time as the recording of the audio data is finished, it is read and recorded in the lead-in area A ₂₂ .

That is, for example, as shown in FIG. 6, the optical disc 1 has a data recording area of 60 minutes,
If the first voice data 51 of 15 minutes in total is recorded in the data recording area of 0 to 15 minutes, and the second voice data 53 of 15 minutes in total is recorded in the data recording area of 30 to 45 minutes, The data recording area of 15 minutes to 30 minutes becomes the first free area 52, and the data recording area of 45 minutes to 60 minutes becomes the second free area 54.

The data recording area of 60 minutes is 000 _H to
The cluster number is 708 _H , and the cluster number indicates the address (hexadecimal notation) of the audio data recorded in the data recording area. In the above case,
For example, as shown in FIG. 7, the first voice data 51 is
Addresses 000 _H to 1 C3 _H , and the second voice data 53 are addresses 384 _H to 5
It is recorded at 45 _H.

The system controller 5 stores the TOC data table of TOC data indicating the usage status of the cluster for each address, in the TOC memory 27.
And is recorded in the lead-in area A ₂₂ .

In the TOC data, as shown in FIG. 8, the first bit (minimum bit (LSB)) to the fourth bit is the recording area of W3, and the fifth bit to the eighth bit is W.
The second recording area, from the ninth bit to the twelfth bit (maximum bit (MSB)) is set as the recording area of W1, and the recording is performed with a total of 12 bits. For example, as shown in FIG. 9, in the recording area of W1, “F _H ” is recorded when the cluster is an empty area, and “E _H ” is recorded when the cluster is the end of the audio data. when reproducing the next cluster continuous from the cluster is recorded "D _H", the cluster in the case of the beginning of the audio data is recorded "C _H", to the cluster of the address indicated by the W1~W3 B _H when instructing to jump
~0 _H is recorded.

When "F _H " indicating an empty area is recorded in the recording area of W1, data indicating the length of the empty area as shown in FIG. 10 is recorded in the recording area of W3. To be recorded. In FIG. 10, "0000" is recorded in the recording area of W3 when the length of the empty area is one cluster, and when the length of the empty area is two to three clusters. When "0001" is recorded and the length of the empty area is 4 to 7 clusters, "001x" is recorded and the length of the empty area is 8 to
If there are 15 clusters, "01XX" is recorded,
When the length of the empty area is 16 clusters or more, "1xxx" is recorded (x is arbitrary).

When "E _H ", which indicates the end of audio data, is recorded in the recording area of W1 and the audio data is composed of only one cluster, the data of W2 and W3 The voice data number is recorded in the recording area. Further, when " _DH " for reproducing the next continuous cluster from that cluster is recorded in the recording area of W1, and when access is made from other than the immediately preceding cluster, audio data is recorded in the recording areas of W2 and W3. The number is recorded.

When "C _H ", which indicates the start of audio data, is recorded in the recording area of W1, the audio data number is recorded in the recording areas of W2 and W3.

Specifically, the above system controller 5
As shown in FIG. 7, since the first voice data 51 is recorded at the address 000 _H to the address 1C3 _H , the TOC data indicating this is the address 000 _H.
Audio data number indicating that _H is audio data up to the end cluster described below from "C _H" and the start cluster indicating the start of the first audio data 51 is the first audio data 51 “01 _H ” is recorded in the TOC memory 27 as the TOC data (“C0
1 _H "), and up to address 001 _H ~ address 1C2 _H, successive next cluster of specifying play" and "record in the TOC memory _{27 (" D H D00 H "} ), the address 1C3 _H is “E _H ” indicating the end of the first voice data 51 is recorded in the TOC memory 27 (“EEE _H ”).

[0058] Also, in the following of the first audio data 51, address 1C4 _H ~ address 383 _H is in the first free space 52. Therefore, the system controller 5, the address 1C4 _H ~ address 383 _H
“FFF _H ” indicating that is an empty area
It is recorded in the TOC memory 27 as data. Also,
The system controller 5 uses the first free space 5
Of 2 of the following, the second to address 384 _H ~ address 545 _H
Since the audio data 53 of the
As C data, "C _H " indicating that the address 384 _H is the start of the second voice data 53 and voice data from this start cluster to the end cluster described below are the second voice data 53. The voice data number "02 _H " indicating that there is is used as the TOC data and the T
Recorded in OC memory 27 (“C02 _H ”) and set address 3
From 85 _H to address 544 _H , “D _H ” designating the reproduction of the next continuous cluster is recorded in the TOC memory 27 (“D00 _H ”), and the address 545 _H is used for the second audio data 53. recording the "E _H" indicating the end to the TOC memory 27 ( "EEE _H").

The address 545 _H to the address 708 _H next to the second audio data 53 is the second empty area 54. Therefore, the system controller 5, the address 545 _H ~ address 708
"FFF _H " indicating that _H is an empty area is set to the above TO
It is recorded in the TOC memory 27 as C data. When the TOC data indicating the empty area is recorded in the TOC memory 27, the system controller 5 also records the data indicating the length of the empty area as described above.

TOC recorded in the TOC memory 27
The data is read by the system controller 5 at the end of recording the audio data and recorded in the lead-in area A ₂₂ .

Here, since the disc recording / reproducing apparatus records the data (“F _H ”) indicating that the cluster is an empty area as TOC data,
The new voice data is added to the first and second empty areas 52, 5
It can be recorded over four.

That is, the system controller 5
When new audio data is to be recorded, as shown in FIG. 11, the first empty area 52 is detected, and the new audio starts from the address 1C4 _H of the first cluster of the first empty area 52. The magnetic head 16 and the optical head 18 are set so as to start recording the third audio data which is data.
Etc. In this case, the third cluster start recording audio data are the cluster address 1C4 _H, the system controller 5, the TOC
In the memory 27, and records the "C03 _H" indicating the start and the audio data number of the recording of the third audio data in the TOC memory 27 as TOC data.

Next, the system controller 5 records the third voice data up to the cluster at the address 383 _H , which is the end cluster of the first empty area 52, and then the second empty area. The magnetic head 16 and the optical head 18 are controlled so as to jump to the cluster at the address 546 _H which is the first cluster of 54 and record the continuation of the third audio data. In this case, the TOC data indicating the address 383 _H which is the end cluster of the first free area 52 is the second cluster.
Address 546 which is the first cluster of the empty area 54 of
Indicating that the recorded jump to _H "546 _H" is recorded in the TOC memory 27. As the TOC data indicating the address 546 _H, so as to reproduce continuously from the cluster of the address 546 _H "D0
3 _H ″ is recorded in the TOC memory 27.

Then, the system controller 5 is
When recording cluster in the third audio data address 5DC _H is completed, the TOC memory "EEE _H" as TOC data indicating that this address 5DC _H the third audio data recording has been completed Record at 27.

The T recorded in the TOC memory 27
After the end of recording the third audio data, the OC data is
The data is read from the TOC memory 27 and recorded in the lead-in area A ₂₂ .

In this way, by recording the data indicating that the cluster is an empty area as the TOC data in the lead-in area A ₂₂ , the third audio data which is new audio data is recorded. , The system controller 5 detects the first and second empty areas 52 and 54, and as shown in FIG. 12, the cluster from the head cluster of the first empty area 52 to the third voice data (third audio data). 1) 55 recording of audio data of
If the length of the audio data 55 of the first empty area 52 exceeds the length of the first empty area 52, the third cluster of audio data from the first cluster of the second empty area 54 )
55 continuations can be recorded.

Since the disk recording / reproducing apparatus, as described above, temporarily stores the audio data to be recorded in the RAM 13, reads it, and records it in the data recording area A ₂₁ , the memory control is performed. Even when the length of the audio data becomes longer than the empty area, the continuous audio data can be recorded in another empty area without losing a part of the continuous audio data.

Next, the reproduction-only area A of the optical disk 1
The operation of the disc recording / reproducing apparatus in the reproducing mode for reproducing the audio data recorded on the recording tracks of the recording medium ₁₀ and the recording / reproducing area A ₂₀ will be described. When the optical disc 1 is set in the disc recording / reproducing apparatus, the system controller 5 rotationally drives the optical disc 1 at a constant angular velocity or a constant linear velocity in advance, and the data region A of the reproduction-only region A ₁₀ of the optical disc 1 is driven. _In order to manage the reproduction position of ₁₁ , the lead-in area A ₁₂ to TO of the reproduction-only area A ₁₀
In order to reproduce the C data and store it in the TOC memory 27 and to manage the reproduction position of the recording / reproducing area A ₂₀ with respect to the data area A _21, from the lead-in area A ₂₂ of the recording / reproducing area A ₂₀ as described above. The TOC data including the data indicating the empty area is reproduced and stored in the TOC memory 27,
A state of waiting for designation of a reproduction mode by turning on a reproduction key provided on the keyboard 4 is set.

Further, the system controller 5 reproduces the TOC data from the lead-in area A ₁₂ of the reproduction-only area A ₁₀ and the lead-in area A ₂₂ of the recording / reproducing area A ₂₀ , and according to each of the TOC data. The recording contents of the respective audio data, the recording time of the audio data, the length (time) of the empty area, and the like are controlled to be displayed on the display unit 3.

Next, when the reproduction key is turned on and the reproduction mode is designated, the system controller 5
The spindle motor 17 is rotationally driven at a constant angular velocity or a constant linear velocity to rotationally drive the optical disc 1, and
The TOC data corresponding to the designated audio data stored in the TOC memory 27 is read, and the optical head 18 is moved to the position where the designated audio data is recorded according to the read TOC data. To control.

The optical head 18 is used for the optical disc 1
When the audio data is reproduced from the reproduction-only area A _{10, the} reproduction signal can be obtained by detecting the change in the amount of the reflected light of the laser light from the target track, and the respective detection outputs from the photodetectors 36 and 37 can be obtained as described above. First
The reproduction signal added and synthesized by the signal synthesizer 38 is supplied to the RF circuit 19 through the changeover switch 40.
When reproducing audio data from the recording / reproducing area A ₂₀ of the optical disc 1, a reproduction signal can be obtained by detecting the difference in the polarization angle (Kerr rotation angle) of the reflected light of the laser light from the target track. , The reproduction signals obtained by subtracting and combining the detection outputs of the photodetectors 36 and 37 by the second signal combiner 39 are output via the changeover switch 40.

The reproduction signal output via the changeover switch 40 is binarized by the RF circuit 19 and supplied to the decoder 21.

The decoder 21 includes the encoder 14
The reproduction output binarized by the RF circuit 19 is subjected to processing such as the above-described decoding processing for error correction and EFM decoding processing, and the above-mentioned compressed data is converted into 75 sectors. The data is reproduced at a transfer rate of / sec and is supplied to the RAM 22 as reproduction data. RA above
In M22, the writing and reading of data are controlled by the system controller 5, and the reproduced data supplied from the decoder 21 at the transfer rate of 75 sectors / second is written in bursts at the transfer rate of 75 sectors / second. The reproduction data written in bursts at the transfer rate of 75 sectors / second is continuously read out from the RAM 22 at the transfer rate of 15 sectors / second.

The system controller 5 performs memory control such that the reproduction data is written in the RAM 22 at a transfer rate of 75 sectors / second and the written reproduction data is continuously read out at a transfer rate of 15 sectors / second. At the same time, by this memory control, the reproduction position is controlled so that the reproduction data written in burst from the RAM 22 is continuously reproduced from the recording track of the optical disc 1. The control of the reproduction position manages the reproduction position of the reproduction data which is burst-read from the RAM 22 by the system controller 5, and controls the servo control of the control signal for designating the reproduction position on the recording track of the optical disc 1. This is done by supplying to the circuit 20.

That is, the above system controller 5
13, the write pointer W of the RAM 22 is incremented at a transfer rate of 75 sectors / second, the reproduction data is written to the RAM 22 at a transfer rate of 75 sectors / second, and the RAM 22 is read. When the pointer R is continuously incremented at a transfer rate of 15 sectors / second, the reproduction data is continuously read from the RAM 22 at a transfer rate of 15 sectors / second, and the write pointer W catches up with the read pointer R. The writing is stopped, and the write pointer W of the RAM 22 is burst-incremented at a transfer rate of 75 sectors / second so that the writing is performed when the data amount of the reproduction data stored in the RAM 22 becomes a predetermined amount L or less. Memory control is performed.

By the memory control by the system controller 5 as described above, the compressed data reproduced from the recording track of the optical disk 1 is burst-written into the RAM 22 at a transfer rate of 75 sectors / second, and the RA is recorded.
Since the compressed data is continuously read from M13 as reproduction data at a transfer rate of 75 sectors / second,
It is possible to continuously read the reproduction data from the RAM 22 while always ensuring a data reading area of a predetermined amount L or more in the RAM 22 for the RAM 13. Further, the reproduction data read out in burst from the RAM 22 can be reproduced continuously from the recording track of the optical disc 1 by controlling the reproduction position on the recording track of the optical disc 1 by the system controller 5. I can. In addition, as described above, since the RAM 22 is always secured with the data reading area of a predetermined amount L or more, the system controller 5 detects that a track jump or the like has occurred due to disturbance or the like, and reproduces the optical disk 1. Even when the operation is interrupted, it is possible to read the reproduction data from the data reading area of the predetermined amount K or more and continue the output of the analog signal, and to perform the restoration processing operation during that time.

The compressed data obtained as the reproduction data continuously read from the RAM 22 at the transfer rate of 15 sectors / second is supplied to the ATRAC decoder 23.
The ATRAC decoder 23 corresponds to the ATRAC encoder 12, and in the operation mode designated by the system controller 5, for example, decompresses the compressed data by 5 times to obtain digital data having a transfer rate of 75 sectors / second. Form voice data, which is D /
It is supplied to the A converter 24 and the digital output circuit 26, respectively.

The D / A converter 24 is the ATRAC
The audio data supplied from the decoder 23 is converted into an analog signal to form an audio signal, which is output via the low pass filter 25. The audio signal passed through the low pass filter 25 is taken out from the output terminal 9. Further, the digital output circuit 26 outputs the audio data supplied from the ATRAC decoder 23 as it is as audio data. The audio data output from the digital output circuit 26 is taken out from the output terminal 8.

Specifically, the system controller 5
7 reproduces the TOC data recorded in the lead-in area A ₂₂ and stores the TOC data in the TOC memory 27, so that the first audio data 51 shown in FIG.
As shown in FIG. 5, the cluster from address 000 _{H to} the cluster at address 1C3 _H is recorded, and the second voice data 53 is recorded from the cluster at address 384 _{H to} the cluster at address 545 _H. As shown in FIG. 11, the voice data 55 of No. 3 has the address 1
C4 and from _H of the cluster to cluster of the address 383 _H, address 546 _H cluster address from 5DC _H of
It is possible to detect that the data is divided into two clusters and recorded.

Therefore, the system controller 5 is
When only the reproduction of the first audio data 51 is designated, the optical head is arranged to reproduce from the cluster of address 000 _{H to} the cluster of address 1C3 _H of the data recording area A ₂₁ of the optical disc 1. 18 is controlled to end the reproduction of the first audio data 51. Also,
When the reproduction of the third audio data 55 is designated, the system controller 5 first addresses the address 1C.
The optical head 18 and the like are controlled so as to reproduce audio data from the 4 _H cluster to the address 383 _H cluster. As described above, T indicating the above address 383 _H
As OC data, “546 _H ”, which specifies a jump to the cluster at address 546 _H , is recorded. Therefore, the system controller 5 controls the optical head 18 and the like so as to jump to the cluster of the address 546 _H and perform the reproduction after the reproduction of the audio data of the cluster of the address 383 _H is completed.

[0081] Next, the system controller 5, the address from the cluster of the address 546 _H 5DC _H
Then, the optical head 18 and the like are controlled so as to reproduce up to the cluster, and the reproduction of the third audio data 55 is ended.

As described above, since the disk recording / reproducing apparatus stores the reproduced audio data in the RAM 22 once, and performs the memory control for reading and outputting the audio data, the third audio data 55 is obtained. Even in the case of reproducing the audio data which is divided into a plurality of areas and recorded, the audio data can be output without interruption when the reproduction is performed by jumping to the next divided area.

As is clear from the above description, the disc recording device, the disc reproducing device and the disc recording / reproducing device having the disc as one device according to the present invention temporarily store the audio data in the RAM 13 in the recording mode. Memory control is performed such that the data is read out and recorded in the data recording area A ₂₁ of the optical disc 1, and the lead-in area A is recorded according to the recorded audio data.
₂₂ , a free area information indicating that the data recording area A ₂₁ is a free area, information indicating the length of the free area, and the recording data recorded in the data recording area A ₂₁ are a series of recording data. Start area information indicating the start, end area information indicating that the record data recorded in the data recording area A ₂₁ is the end of a series of record data, and reproduction of the record data of the next continuous cluster. The position and length of the empty area can be easily detected by recording the continuous reproduction information for instructing the above and the combined address information indicating the connection destination from that data recording area to another data recording area as TOC data. In addition, since the memory control is performed, a new series of audio data can be recorded over a plurality of empty areas without interruption.

Therefore, the data recording area A ₂₁ of the optical disc 1 can be effectively used without waste.

In the reproduction mode, the disk recording / reproducing apparatus performs memory control such that the audio data reproduced from the data recording area A ₂₁ is once stored in the RAM 22 and is read out and output. Since reproduction is performed according to the TOC data recorded in the recording mode, a series of audio data recorded over the plurality of empty areas can be output without interruption.

In the above description of the embodiment, only the audio data is recorded on the optical disc 1. However, it goes without saying that both audio data and image data may be recorded.

[0087]

The disk recording / reproducing apparatus according to the present invention is
The data recording means records the recording data in the data recording area for each cluster, and the lead-in information recording means records the free area information indicating that the data recording area is a free area and the data recording area in the data recording area. Start area information indicating that the recorded record data is the start of a series of record data, end area information indicating that the record data recorded in the data recording area is the end of the series of record data, and continuous By recording the continuous reproduction information for instructing the reproduction of the recorded data of the next cluster and the combined address information indicating the connection destination from the data recording area to another data recording area in the lead-in area as list data, A new series of audio data can be divided and recorded over a plurality of empty areas. Therefore, the data recording area of the disc can be effectively used without waste.

Further, the disc reproducing apparatus according to the present invention,
Free area information indicating that the data recording area is a free area by the lead-in information reproducing means, and start area information indicating that the recording data recorded in the data recording area is the start of a series of recording data. , End area information indicating that the recording data recorded in the data recording area is the end of a series of recording data, continuous reproduction information for instructing reproduction of the recording data of the next continuous cluster, and its data recording area From the lead-in area of the disc in which the linking address information indicating the linking destination from the data recording area to the other data recording area is recorded in the lead-in area Information is reproduced, and a predetermined number of plural sectors are made into one cluster by the data reproducing means based on each of the above information, and the data is reproduced for each cluster. By reproducing the record data recorded in the data recording area can be reproduced a series of audio data recorded are divided over a plurality of free space.

Further, in the disk according to the present invention, a predetermined number of plural sectors are set as one cluster in the data recording area, the recording data is recorded for each cluster, and the lead-in area has the empty data recording area. The free area information indicating that the recording data recorded in the data recording area is the start of a series of recording data, and the recording data recorded in the data recording area is a series of End area information indicating the end of the recorded data, continuous reproduction information for instructing reproduction of the recorded data of the next continuous cluster, and a connection address indicating a connection destination from the data recording area to another data recording area By recording information, a series of divided recording of audio data over a plurality of vacant areas and one divided and recorded over the plurality of vacant areas are recorded. Can allow the reproduction of audio data, it is possible to effectively utilize the data recording area.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a disk recording apparatus, a disk reproducing apparatus, and a disk recording / reproducing apparatus in which a disk is integrated as one apparatus according to the present invention.

FIG. 2 is a schematic plan view for explaining the structure of an optical disc used in the disc recording / reproducing apparatus.

FIG. 3 is a diagram showing a recording state of recording data of one cluster recorded on the optical disc.

FIG. 4 is a diagram showing a state of a RAM for explaining memory control in the recording mode of the disc recording / reproducing apparatus of the embodiment.

FIG. 5 is a block diagram of an optical head provided in the disk recording / reproducing apparatus of the above embodiment.

FIG. 6 is a schematic diagram for explaining a recording state of audio data on the optical disc.

FIG. 7: TOC of audio data recorded on the optical disc
It is a schematic diagram for demonstrating data.

FIG. 8 is a schematic diagram for explaining a recording mode of the TOC data.

FIG. 9 is a schematic diagram for explaining the operation of the disc recording / reproducing apparatus represented by each TOC data.

FIG. 10 is a schematic diagram for explaining TOC data indicating the length of an empty area.

FIG. 11 is a schematic diagram for explaining the operation of the disc recording / reproducing apparatus when recording new audio data in the empty area.

FIG. 12 is a schematic diagram for explaining a recording state when new audio data is recorded in the empty area.

FIG. 13 is a diagram showing a state of a RAM for explaining memory control in the reproduction mode of the disc recording / reproducing apparatus of the embodiment.

FIG. 14 is a diagram showing a recording state of a data recording area in a conventional disc.

FIG. 15 shows T corresponding to the recording state of the data recording area.
It is a figure which shows the content of OC data.

[Explanation of symbols]

1 ・ ・ ・ ・ ・ ・ ・ ・ Optical disk 2 ・ ・ ・ ・ ・ ・ Recording / reproducing system 3 ・ ・ ・ ・ ・ ・ Display section 4 ・······· Keyboard 5 ········· System controller 10 ········· Low-pass filter 11 ···・ ・ ・ ・ ・ ・ ・ ・ ・ A / D converter 12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ATRAC encoder 13 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ RAM 14 ・ ・ ・ ・ ・ ・ ・ ・··· Encoder 15 ····· Magnetic head drive circuit 16 ······ Magnetic head 17 ······ Spindle motor 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Optical head 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ RF circuit 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Servo control circuit 21 ・...・ ・ ・ ・ ・ ・ ・ ・ Decoder 22 ・ ・ ・ ・ ・ ・ ・ ・ RAM 23 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ATRAC Decoder 24 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ D / A converter 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Low pass filter 26 ・ ・ ・ ・ ・ ・ ・ Digital output circuit A ₁₀・ ・ ・ ・ ・ ・・ Read-only area A ₁₁・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Data recording area A ₁₂・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lead-in area A ₂₀・ ・ ・ ・ ・... recording and reproducing area A ₂₁ ············ data recording area A ₂₂ ············ lead-in area

Claims (3)

[Claims] 1. A predetermined number of plural sectors is defined as one cluster,
A disk recording apparatus is arranged such that recording data is recorded in a data recording area for each cluster and index data indicating recording contents of the data recording area is recorded in a lead-in area. Data recording means for recording the recording data for each cluster, free area information indicating that the data recording area is a free area, and the recording data recorded in the data recording area are the start of a series of recording data. Area information indicating that the recording data recorded in the data recording area is the end of a series of recording data, and continuous reproduction for instructing reproduction of the recording data of the next continuous cluster. Information and combination address information indicating a connection destination from that data recording area to another data recording area are used as the list data as the read data. Disk recording apparatus characterized in that a lead-in information recording means for recording in-area. 2. A predetermined number of plural sectors is defined as one cluster,
The recording data is recorded in the data recording area for each cluster, and the free area information indicating that the data recording area is a free area and the recording data recorded in the data recording area are a series of recording data. Start area information indicating the start, end area information indicating that the record data recorded in the data recording area is the end of a series of record data, and an instruction to reproduce the record data of the next continuous cluster Continuous reproduction information and the combined address information indicating the connection destination from the data recording area to another data recording area are recorded in the lead-in area from the lead-in area to the free area information, start area information, Lead-in information reproducing means for reproducing end area information, continuous reproduction information and combined address information, and reproduction by the lead-in information reproducing means. Data reproducing means for reproducing the record data from the data recording area on the disc based on the free area information, the start area information, the end area information, the continuous reproduction information and the combined address information which have been recorded. Disc playback device. 3. A predetermined number of plural sectors is defined as one cluster,
A data recording area in which recording data is recorded for each cluster, free area information indicating that the data recording area is a free area, and the recording data recorded in the data recording area is the start of a series of recording data. Area information indicating that the recording data recorded in the data recording area is the end of a series of recording data, and an instruction to reproduce the recording data of the next continuous cluster. A disc having a lead-in area in which continuous reproduction information and joint address information indicating a joint destination from the data recording area to another data recording area are recorded.