JPH1125610A - Recording medium, recording device and recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a high bit rate of input information by alternately arranging 1st and 2nd recording blocks and making a head movable while information is recorded in the 2nd recording block when a recordable area of the 1st recording block is cut apart. SOLUTION: At the time of recording continuous information in the recordable areas 401 and 403, discriminating information in a leading area of a magneto-optical disk is accessed beforehand. The discriminating information is composed of such information as to whether the 1st and 2nd recording blocks constituting the magneto-optical disk and individual sectors of the 2nd recording block have already been recorded or not and the connecting state of the sectors, etc. Then, when a magnetic head is in the recordable area 403, the 1st recording block is recorded, and when the head is moved into the recorded area 402, nonrecorded sectors 405, 406 and 407 of the 2nd recording block are recorded in turn. When the head is further moved to enter the recordable area 401, nonrecordable sectors 408 and 409 of the 1st recording block are recorded in turn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium, a recording apparatus and a recording method, and more particularly to a recording medium capable of saving a write information holding buffer on a recording side and increasing the bit rate of input information.

[0002]

2. Description of the Related Art Conventionally, in a disk device for magnetically or optically recording information, when recording continuous third information, a discontinuous recordable area does not occur on a medium for recording information. As described above, the recorded second information is rearranged. For example, when the discontinuity of the recordable area as shown in FIG. 1 occurs, the already recorded second information is temporarily
Reading and re-recording are continuously performed on the first information to make the recordable area continuous.

[0003]

However, as described above, when the continuous third information is recorded after eliminating the discontinuous recordable area, the already recorded second information is rearranged. Later, the third information is recorded continuously. Therefore, when the real-time processing is performed,
It was necessary to increase the recording rate. In particular, when the rate of the continuous third information itself is high, it is difficult to control the speed of the medium. In addition, a large amount of buffer is required to rearrange the already recorded second information.

[0004]

Means for Solving the Problems The present invention has been made in view of the above-mentioned problems, and a recording medium according to the present invention comprises:
It has a first recording block and a second recording block, and is characterized mainly in that the first recording blocks and the second recording blocks are alternately arranged. Whether the first recording block and the second recording block are recordable,
It is characterized in that the determination information as to whether or not is recorded in a predetermined area.

[0005] Further, an area for recording the discrimination information is a head area of a recording medium. Further, the second recording block is constituted by a total of N sectors. Further, a recording apparatus according to the present invention includes a recordable recording medium described above, a buffer for holding information input from outside, reading information from the buffer, and storing the first recording block and the second recording block. Recording means for selectively recording in a block.

The capacity Cf of the first recording block, the capacity Cj of the second recording block, the total number of sectors N of the second recording block, the recording bit rate Rm on the medium, and the capacity of the buffer The write rate Rb, the time Tj required for the recording means to move between the second recording blocks and record information in the second recording block, and the buffer capacity Cb, The arrangement of the recording blocks is determined.

Further, the first recording block capacity Cf is:
It is characterized by being at least larger than Tj × Rb. Also,
When the total number of the second recording blocks is Nt + 1, n is a positive integer of 1 or more and Nt or less, and m is a positive integer of n + m <Nt + 1, the buffer capacity Cb is at least
n × Tj × Rb, the recording bit rate R for the medium
m is at least n / m × {(Tj + Cj / (Rm × N)) × Rb-Cj / N}
+ (Cf + Cj) × Rb / Rm = Rf that satisfies Cf.

Further, the time Tj is Tj = (Cf + Cj) / Rm
Is satisfied. Further, a recording method according to the present invention is a recording method for recording information on the recordable recording medium described above, wherein recording on a first recording block has priority over recording on a second recording block, The main feature is that, when the first recording block has been recorded, recording is performed on the second recording block.

When the second recording block is divided into a total of N sectors, recording on the first recording block has priority over recording on the second recording block. Is recorded in an unrecorded sector of the second recording block when the data is already recorded. Also, in this case, the recording is sequentially performed on the second recording block one sector at a time.

[0010]

Embodiments of the present invention will be described below. FIG. 2 is a block diagram showing the overall configuration of the disk device according to the embodiment of the present invention. FIG. 3 is a conceptual diagram showing a logical configuration of a magneto-optical disk according to the embodiment of the present invention. FIG. 4 is a conceptual diagram illustrating a recording operation according to the embodiment of the present invention. FIG. 5 is a graph showing a change in buffer capacity according to the embodiment of the present invention.

In FIG. 2, reference numeral 201 denotes an input unit for performing coding, adding an error correction code, and the like to a signal input from the outside. Reference numeral 202 denotes a modulation unit that performs digital modulation on the output of the input unit 201. 203 is
This is a buffer that can write the output of the modulation unit 202, temporarily accumulate it, and read it out asynchronously with the writing side.
204 is a pickup, and 205 is a magnetic head. 206 is the pickup 204 and the magnetic head 2
05 is a magneto-optical disc on which information can be recorded.

The magneto-optical disk 206 has the logical configuration shown in FIG. In FIG. 3, reference numeral 301 denotes a first recording block for recording information when a continuous recordable area exists. Reference numeral 302 denotes a second recording block for recording information when the recordable area is divided. The second recording block 302 includes N sectors 30
3.

Reference numeral 207 denotes a demodulation unit which reads data from the magneto-optical disk 206 using the pickup 204, accumulates the data in the buffer 203, and digitally demodulates the read information. 208 is for the output of the demodulation unit 207
An output unit that performs error correction, detection, decoding, and the like.
The operation of the embodiment of the present invention will be described taking a case where the recordable area is divided as shown in FIG. 4 as an example. In FIG. 4, reference numerals 401 and 403 denote recordable areas in which the first recordable block has not been recorded. Reference numeral 402 denotes a recorded area in which the first recordable block has been recorded. 40
5, 406 and 407 are sectors constituting the second recording block. 408 and 409 are first recording blocks. It should be noted that the disk status as shown in FIG. 6 occurs when information is recorded in all areas of the disk and then only the areas 401 and 402 are erased. Naturally, at the time of such erasing, the discrimination information at the head of the disc is also rewritten.

When recording continuous information in the recordable areas 401 and 403, prior to recording, the magneto-optical disk 20
Access the discrimination information recorded in the head area of No. 6. The discrimination information includes a first recording block, a second recording block, and a second recording block constituting the magneto-optical disk 206.
Each of the sectors constituting the recording block is configured by information such as whether or not the block and the sector have been recorded, and the connection status of the block and the sector.

The input signal is subjected to encoding, addition of an error correction code and the like in an input section 201, and a modulation section 202
Applies digital modulation for recording on a magneto-optical disk. The output of the modulator 202 is written to the buffer 203 at a bit rate Rb. Bit rate from buffer 203
Read the information written in Rm and pick up
4. Magneto-optical disk 206 using magnetic head 205
To record. At this time, when a head exists in the recordable area 403, information is recorded in the first recording block. When the head moves and enters the recorded area 402, the second
Unrecorded sectors 405, 406, 40 of the recording block
Information is recorded in the order of 7. The head moves further,
When entering the recordable area 401, the first recording block 40
Information is recorded in the order of 8, 409.

FIG. 5 shows the change in the buffer occupancy at this time. In FIG. 5, t1 is a recordable area 40 of the head.
3 shows the timing at the boundary between the recorded area 402 and the recorded area 402.
t2 is the time when the head is in the recorded area 402 and the recordable area 40
The timing at the boundary of No. 1 is shown. While the head is in the recorded area, the buffer occupancy increases. The capacity of the buffer 203 and the capacity of the magneto-optical disc are set so that the buffer 203 does not overflow, and the information stored in the buffer can be recorded on the magneto-optical disc while the head is in the recordable area. Adjust the write bit rate Rm.

Hereinafter, the adjustment will be described. First
, The capacity Cj of the second recording block, and the total number N of sectors of the second recording block. The time required for moving the head between the second recording blocks and recording information in the second recording block is defined as Tj. In particular, when Tj = (Cf + Cj) / Rm is satisfied, the second
Is the time when the track jump is not performed. When continuous information is recorded, the first number of recording blocks to be recorded is m, and the second number of recording blocks is n.

Here, when the head is in the recorded area,
By the time information is recorded in any second recording block,
The information of Tj × Rb is written in the buffer 203. In the recorded area, a buffer capacity of at least n × Tj × Rb is prepared in order to record information in a total of n second recording blocks. When the head is in the recorded area, the amount of information accumulated in the buffer 203 is (Tj + Cj / (Rm × N)) × Rb-Cj / each time information is recorded in the second recording block.
N. Therefore, at time t2, n × {(Tj + Cj / (Rm ×
N)) × Rb-Cj / N} is stored in the buffer 203. Since it is necessary to process this information while recording the information in the first recording blocks of the total number m, the first recording block includes n / m × {(Tj + Cj / (Rm × N)) × Rb-C
j / N} of the first buffer information. The time required for the head to move between the first recording block and the second recording block is (Cf + Cj) / Rm. The second buffer information written to the buffer 203 during this time is (Cf + Cj) × Rb / Rm. Since the first buffer information and the second buffer information need to be recorded in the first recording block, the bit rate Rm for writing to the magneto-optical disk 206 is at least n / m × {(Tj + Cj / (Rm × N) ) × Rb-C
j / N} + (Cf + Cj) × Rb / Rm = Rm that satisfies Cf.

When the recording operation is completed, the above-mentioned discrimination information is updated so as to match the recording state of the magneto-optical disk 206 at the end of the recording, and is written in a predetermined area of the magneto-optical disk 206. In the case of reproducing the recorded information, the information is read from the magneto-optical disk using the pickup 204,
Write to buffer 203. The information written from the buffer 203 is read out, digital demodulation is performed by the demodulation unit 207, error correction, detection, decoding, and the like are performed by the output unit 208, and output to the outside.

[0020]

As described above, according to the present invention, when the recordable area in which the first recording block can be recorded is divided, the recorded area in which the first recording block has been recorded is Since the head can be moved while recording information in the second recording block, it is easy to control the speed of the medium and can cope with a high bit rate of input information. In addition, information can be recorded in the divided recordable area by reducing the capacity of the buffer.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram when rearrangement of recorded information is performed.

FIG. 2 is a block diagram showing the overall configuration of a disk device.

FIG. 3 is a conceptual diagram showing a logical configuration of a magneto-optical disk.

FIG. 4 is a conceptual diagram illustrating a recording operation.

FIG. 5 is a graph showing a change in buffer capacity.

[Explanation of symbols]

 203 Buffer 206 Disk 301 First recording block 302 Second recording block 303 Sector

Claims (12)

[Claims] 1. A recording medium having a first recording block and a second recording block, wherein the first recording block and the second recording block are alternately arranged. 2. The recording method according to claim 1, wherein information for determining whether the first recording block and the second recording block are recordable is recorded in a predetermined area. Medium. 3. The recording medium according to claim 2, wherein the area for recording the discrimination information is a head area. 4. The recording medium according to claim 1, wherein the second recording block includes a total of N sectors. 5. A recording medium according to claim 1, a buffer for holding information input from outside, reading information from said buffer, and reading said first recording block and a second recording block. Recording means for selectively recording data in a recording block. 6. The recording medium according to claim 5, wherein a capacity Cf of the first recording block, a capacity Cj of the second recording block, a total number of sectors N of the second recording block, and a recording bit for the medium. A rate Rm, a writing rate Rb to the buffer, a time Tj required for the recording means to move between the second recording blocks and record information in the second recording block, and the buffer capacity Cb
And (c) determining the arrangement of the second recording block. 7. The recording apparatus according to claim 6, wherein the first recording block capacity Cf is at least larger than Tj × Rb. 8. The method according to claim 6, wherein the total number of the second recording blocks is Nt + 1, n is a positive integer from 1 to Nt, and m is a positive integer satisfying n + m <Nt + 1. If an integer, the buffer capacity Cb is at least larger than n × Tj × Rb, and the recording bit rate Rm on the medium is at least n / m × {(Tj + Cj / (Rm × N)) × Rb-Cj
/ N} + (Cf + Cj) × Rb / Rm = Rf that satisfies Cf. 9. The recording apparatus according to claim 6, wherein the time Tj satisfies Tj = (Cf + Cj) / Rm. 10. A recording method for recording information on a recording medium according to claim 1, wherein recording on a first recording block is prioritized over recording on a second recording block. A recording method for performing recording on a second recording block when the first recording block has been recorded. 11. A recording method for recording information on a recording medium according to claim 4, wherein the recording on the first recording block is performed by a second recording block.
A recording method in which recording is performed in an unrecorded sector of a second recording block when the first recording block has been recorded, in preference to recording in a recording block of the second recording block. 12. The recording method according to claim 11, wherein recording is sequentially performed on the second recording block one sector at a time.