JP3310650B2 - Information recording apparatus and information recording method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention belongs to the technical field of an information recording method and apparatus for recording information on a recordable information recording medium.

[0002]

2. Description of the Related Art In general, an information recording apparatus of this type is capable of recording various data input from a host computer only once under the control of the host computer. R, etc.). At this time, the transfer speed of the data transferred from the host computer to the information recording device is often different from the recording speed of the information recording device recording the transferred data on a DVD-R or the like. The transfer speed from is set to be faster.

In order to cancel the difference between the transfer speed and the recording speed, a buffer memory is provided in the information recording device, and the transferred data is temporarily stored in the buffer memory at the transfer speed. Generally, a method of reading out the data at a speed corresponding to the recording speed to cancel the speed difference is used.

In an information recording apparatus having the above buffer memory, the balance between the amount of data read from the buffer memory and the amount of data written to the buffer memory is lost due to the speed difference between the transfer speed and the recording speed. However, the amount of data written to the buffer memory is larger than the amount of data read from the buffer memory, and a situation may occur in which the storage amount of data in the buffer memory continuously increases. For this reason, the processor that controls the information recording device issues a command (hereinafter referred to as a data transfer stop command) indicating that the transfer of the data should be temporarily stopped when the storage of the transferred one section of data is completed. The capacity of the free recording area in the buffer memory, which is transmitted to the host computer and increases with the recording on the DVD-R or the like, is constantly monitored. A command requesting transfer from the host computer (hereinafter, referred to as a data transfer request command) is transmitted to the host computer. Then, the new data is transferred and accumulated in the buffer memory, and when the free space of the buffer memory becomes “0” or a predetermined level or less, a data transfer stop command is transmitted to the host computer again. By repeating the above operation, the transferred data is
This is recorded in R or the like. Then, the host computer controls the data transfer based on the data transfer stop command and the data transfer request command.

By the way, the host computer includes:
In general, various peripheral devices such as a hard disk drive are connected in addition to the information recording device. However, the operation speed of these peripheral devices is lower than the operation speed of the host computer. There are many. For this reason, in a so-called batch process in which the host computer performs a process on one peripheral device and shifts to another process after the process is completed, the host computer aims to improve the use efficiency of the host computer. It is common practice to assign a priority to the processing for each peripheral device and to perform the processing for each peripheral device in a time-sharing manner based on the priority.

[0006] At this time, in the priority order, a so-called man-man who is directly involved in the user of the host computer.
Normally, the priority related to the machine interface is set higher. Therefore, even if the host computer receives the data transfer request command from the information recording device, the host computer has a higher priority than the information recording device. During execution of the processing for the peripheral device, there may be a case where it is not possible to immediately respond to the data transfer request command. That is, the information recording device uses the DV of the data.
In spite of the fact that the recording operation to the D-R or the like is executed, there is a case where data to be recorded is not stored in the buffer memory, that is, a so-called underrun state in the information recording apparatus may occur. is there.

When this underrun condition occurs, the continuity of the data cannot be maintained when reading data from the buffer memory.
In the information recording apparatus for R or the like, the recording operation is temporarily interrupted, and after the underrun is resolved, new data including data that has already been recorded is transferred to the DVD at predetermined intervals of data. Recording is performed again in a new recording area on -R or the like.

[0008]

When recording is resumed, the continuity between the additionally recorded information and the information previously recorded is required.

Accordingly, an object of the present invention is to provide an information recording apparatus and method capable of improving the continuity accuracy of added information even when an underrun occurs.

[0010]

Means for Solving the Problems To solve the above problems,
In the present invention, the recording information to be recorded is temporarily buffered.
And read the recorded information to the information recording medium.
An information recording apparatus for recording, wherein the buffer means
Detecting means for detecting the storage amount of the recording information in the
The detected storage amount is equal to or smaller than a predetermined storage amount.
When it becomes, the place in the predetermined information unit in the record information
Stop means for stopping recording at a fixed position, and recording stop
Is the recording information recorded on the information recording medium immediately before
Storage means for storing already-recorded information;
Is a middle part of the predetermined information unit, and
Restart recording from within the predetermined information unit including the predetermined position
It is characterized by that.

According to the operation of the present invention, the detecting means detects the storage amount of the record information in the buffer means. Then, when the detected storage amount becomes equal to or less than the predetermined storage amount, the stopping unit stops recording the recording information. Further, the recorded information is stored in the storage means.

Therefore, when additional recording is performed after the underrun is resolved, it is easy to increase the accuracy of continuity between the additionally recorded information and the information previously recorded.

[0013]

Next, a preferred embodiment of the present invention will be described with reference to the drawings. The following embodiment describes an embodiment in which the present invention is applied to an information recording apparatus for recording information on the DVD-R. (I) Embodiment of recording format First, DVD-
FIG. 1 shows a general physical format when recording information is recorded in R and error correction processing in the recording information.
This will be described with reference to FIG.

First, an error correction process in a DVD-R according to the present embodiment and an ECC block as an error correction unit in the error correction process will be described with reference to FIG.

Generally, recording information recorded on a DVD-R has a physical structure including a plurality of data sectors 20 shown in FIG. In one data sector 20, ID information 21 indicating the start position of the data sector 20 and an ID information error correction code (IEC (ID
Data Error correction Code)) 22, preliminary data 23, data 24 which is main data to be recorded,
An error detection code (EDC (Error Detection Code)) 25 for detecting an error in the data 24 is formed, and recording information to be recorded is formed by a plurality of consecutive data sectors 20.

Next, an EC using this data sector 20 is performed.
The processing in the encoder described below when configuring the C block will be described with reference to FIG. Data sector 20
When configuring an ECC block using
First, as shown in FIG.
The data is divided for each byte, and each divided data (hereinafter, referred to as a data block 33) is arranged in the vertical direction (see FIG. 1 (b) -1). At this time, 12 rows of data blocks 33 are arranged in the vertical direction.

Then, a 10-byte ECC inner code (PI
(Pality In) code 31 is added to the end of the data block 33 to form one correction block 34 (FIG. 1).
(B) -2). At this stage, 12 correction blocks 34 to which the ECC internal code 31 is added are arranged in the vertical direction. Thereafter, the above processing is repeated for 16 data sectors 20. As a result, a correction block 34 of 192 rows is obtained.

Next, the above-mentioned 192 line correction block 34
Are arranged in the vertical direction, this time, the correction block 34 of 192 rows is vertically divided from the beginning for each byte, and 16 ECCs are applied to each divided data.
An outer code (PO (Pality Out) code) 32 is added. The ECC outer code 32 is also added to the ECC inner code 31 in the correction block 34.

By the above processing, 16 data sectors 2
One ECC block 30 including 0 is formed as shown in FIG. At this time, one ECC block 30
The total amount of information contained in is (172 + 10) bytes x
(192 + 16) rows = 37856 bytes, of which the actual data 24 is 2048 bytes × 16 = 32
This is 768 bytes.

In the ECC block 30 shown in FIG. 1B, 1-byte data is indicated by "D #. *". For example, “D1.0” indicates 1-byte data arranged in the first row and the 0th column, and “D19”
"0.170" indicates 1-byte data arranged at the 190th row and the 170th column. Therefore, the ECC inner code 31 is arranged in the 172nd column to the 181st column, and the ECC outer code 32 is arranged in the 192nd to 207th rows.

Further, one correction block 34 is a DVD-R
Above is recorded continuously. Here, as shown in FIG. 1B-2, the ECC block 30 is divided into the ECC inner code 31 and ECC.
The configuration including both of the CC outer codes 32 is shown in FIG.
This is because the correction of the data arranged in the horizontal direction in (b) -2 is performed by the ECC inner code 31 and the correction of the data arranged in the vertical direction in FIG. . That is, within the ECC block 30 shown in FIG. 1B-2, it is possible to perform error correction in both the horizontal and vertical directions.

More specifically on this point, for example,
One correction block 34 (as described above, one line of ECC
A total of 182 bytes of data including the inner code 31 is recorded on the DVD-R continuously. ) Are all DVD-R
Even if it is destroyed by a flaw or the like, when viewed from the vertical direction, there is only one byte of data corruption for one column of the ECC outer code 32. Therefore, if error correction is performed using the ECC outer code 32 in each column, even if all of one correction block 34 is destroyed, error correction can be performed correctly and reproduction can be performed accurately.

Next, the data sector 20 constituted by the ECC block 30 shown in FIG.
How it is recorded in -R will be described with reference to FIG. In FIG. 2, data indicated by “D #. *” Corresponds to each data described in FIG. 1B-2. It should be noted that, in FIG.
(Interleaving and 8-16 modulation) at the time of recording is a process executed in an encoder described later.

When recording the ECC blocks 30 on a DVD-R, first, as shown in the uppermost part of FIG. 2, the ECC blocks 30 are arranged in a line in the horizontal direction for each correction block 34 and interleaved. Is divided into 16 recording sectors 40. At this time, one recording sector 40 has 2366 bytes (3785 bytes).
6 bytes (16 bytes) of information, in which the data sector 20 and the ECC inner code 31 or the ECC outer code 32 coexist. However, at the beginning of each recording sector 40, ID information 21 in the data sector 20 (see FIG. 1A) is arranged.

Then, one recording sector 40
Is divided into data 41 of 91 bytes each, and a header H is added to each of them. Thereafter, the recording sector 40 in this state is subjected to 8-16 modulation, so that one sync frame 42 is formed for each data 41. At this time, one sync frame 42 includes the header H ′ and the data 4
3. The information amount in one sync frame 42 is 91 bytes × 8 × (16/8) = 1.
Information is written to the DVD-R1 in a format in which the sync frames 42 are 456 bytes. At this time, one recording sector 40 includes 26 sync frames 42.

By recording the information on the DVD-R by configuring the physical format described above, if the information is reproduced, 8-16 demodulation and deinterleaving are performed (see FIG. 2). The block 30 can be restored, and the information can be accurately reproduced by performing the strong error correction as described above. (II) Embodiment of Information Recording Apparatus Next, information is recorded on a DVD-R in the physical format described with reference to FIGS.
An embodiment of an information recording apparatus according to the present invention for recording the information on a recording medium 1 will be described with reference to FIGS. In addition,
In the following embodiment, the DVD-R1
Pre-pits on which address information and the like on the VD-R1 are recorded are formed in advance on information tracks on which the recording information is to be recorded, and when recording information is recorded, the pre-pits are detected in advance so as to be recorded on the DVD-R1. It is assumed that address information is obtained, and a recording position on the DVD-R1 where the recording information is to be recorded is detected and recorded.

First, the configuration of the information recording apparatus according to the present invention will be described with reference to FIG. As shown in FIG.
The information recording apparatus S according to the embodiment includes a pickup 2 as a recording restarting unit, a reproducing amplifier 3, a decoder 4, a pre-pit signal decoder 5, a spindle motor 6, a servo circuit 7, a detecting unit, a stopping unit, and a storage. It comprises a processor 8 as means and recording restart means, an encoder 9 as recording restart means, a power control circuit 11, a laser drive circuit 12, and an interface 13. Further, recording information SR to be recorded is input from the external host computer 14 to the information recording apparatus S via the interface 13.

The encoder 9 has a buffer memory 10 as buffer means. Next, the overall operation will be described.

The pickup 2 includes a laser diode (not shown), a deflection beam splitter, an objective lens, a photodetector, etc., and irradiates a light beam B to the information recording surface of the DVD-R1 based on a laser drive signal SDL, and reflects the light beam B. The pre-pit is detected based on the light, and an encode signal SRE to be described later to be recorded is recorded. If there is already recorded information, the pre-pit is recorded based on the reflected light of the light beam B. Detect information.

The regenerative amplifier 3 includes the pickup 2
Amplifies the detection signal SDT containing the information corresponding to the pre-pits output from the CPU, outputs the pre-pit signal SPP corresponding to the pre-pits, and outputs the amplified signal SP corresponding to the recorded information already recorded.

Thereafter, the decoder 4 decodes the amplified signal SP by subjecting the amplified signal SP to 8-16 demodulation and deinterleaving, and outputs a demodulated signal SDM and a servo demodulated signal SSD.

On the other hand, the pre-pit signal decoder 5 decodes the pre-pit signal SPP and decodes the pre-pit signal SPD.
Is output. Then, the servo circuit 7 outputs a pickup servo signal SSP for focus servo control and tracking servo control in the pickup 2 based on the demodulated pre-pit signal SPD and the servo demodulated signal SSD, and rotates the DVD-R1. A spindle servo signal SSS for servo-controlling the rotation of the spindle motor 6 is output.

In parallel with the above, the processor 8 outputs a reproduction signal SOT corresponding to the information already recorded on the basis of the demodulated signal SDM to the outside, and outputs a buffer control signal SC to be described later. Is mainly controlled.

On the other hand, under the control of the processor 8, the interface 13 performs an interface operation for taking the recording information SR transmitted from the host computer 14 into the information recording apparatus S, and performs the recording information SR. Is output to the encoder 9.

The encoder 9 has an EC (not shown)
A C generator, an 8-16 modulation section, a scrambler, etc., and a buffer memory 10 are provided.
The ECC block 30 is configured by adding the inner C code 31 and the outer ECC code 32, and the ECC block 30
Are subjected to interleaving, 8-16 modulation, and scrambling to generate an encoded signal SRE. At this time, the buffer memory 10 included in the encoder 9
Stores the recording information SR from the host computer 14 temporarily based on the buffer control signal SC from the processor 8 and records the recording information SR at a reading speed corresponding to the recording speed of the encode signal SRE by the pickup 2 for the DVD-R1. Output information SR.

The power control circuit 11 drives the drive signal SD for controlling the output of a laser diode (not shown) in the pickup 2 based on the encode signal SRE.
Is output.

Thereafter, the laser drive circuit 12 outputs a laser drive signal SDL for actually driving the laser diode to emit the light beam B based on the drive signal SD.

The information recording device S is a DVD-ROM.
It is also possible to reproduce the information recorded in R1. In this case, the processor 8 is operated based on the demodulated signal SDM.
The reproduced signal SOT is output to the outside via the. (III) Information Recording Operation Next, a recording information recording operation according to the present invention will be described with reference to FIGS. In addition,
FIG. 4 is a flowchart showing a recording operation of the recording information according to the present invention, and is a flowchart mainly showing processing executed by the processor 8. FIG.
FIG. 5A shows the data amount of the record information SR in the buffer memory 10 when the recording operation shown in FIG. 4 is executed, and FIG. 5B shows the data amount corresponding to the recording operation shown in FIG. FIG.

As shown in FIG. 4, in the recording operation according to the present invention, when the information recording device S is first activated,
A host computer 14 via an interface 13
The recording information SR is fetched from the buffer memory 10 in the encoder 9 (step S1, FIG. 5).
(A) Reference sign (a)). And the buffer memory 1
When 0 is satisfied, the data transfer stop command SS is transmitted to the host computer 14, and the encode signal SRE is generated based on the record information SR stored in the buffer memory 10, and the power control circuit 11,
The recording of the encode signal SRE is started by the laser drive circuit 12, the pickup 2, and the like (step S2),
Next, a UR flag in the processor 8 indicating that the buffer memory 10 has entered the underrun state is initialized (step S3). At this time, when recording is started in step S2, the amount of data in the buffer memory 10 is gradually reduced (see the portion (a) in FIG. 5A).

Next, while the output of the record information SR is continued, the data amount in the buffer memory 10 is confirmed by the processor 8 (step S4). Thereafter, the UR flag is set to "1" (the UR flag is set to "1"). "1" indicates that the buffer memory 10 is in an underrun state.) And the amount of data in the buffer memory 10 is not full (the buffer memory 10 is not filled with the recording information SR). The processor 8 determines whether or not this is the case.

In step S5, since the UR flag is not currently "1" (step S5; NO), the amount of data in the buffer memory 10 is transmitted to the host computer 14 by the data transfer request command. It is determined whether the data amount of the buffer memory 10 to which SQ is to be output is greater than a predetermined level A (see FIG. 5A) (step S6). If the data amount is equal to or less than the level A (step S6; NO, see the portion (c) in FIG. 5A), the processor 8 transmits a data transfer request command SQ to the host computer 14 (step S6). S7). As a result, when the recording information SR is transferred from the host computer 14, the amount of data in the buffer memory 10 gradually increases (see the code (d) in FIG. 5A).

At this stage, if the transfer of the recording information SR from the host computer 14 is stopped, the recording operation is continued, so that the data amount in the buffer memory 10 is reduced (FIG. 5A). Reference sign (e)). Then, it is determined whether the amount of data in the buffer memory 10 is greater than a preset level B (see FIG. 5A), which is a reference data amount to be determined that the buffer memory 10 is underrun. Is determined (step S8). Here, more specifically, the ECC block 30
Is composed of 32 Kbytes, the level B is, for example, 48 Kbytes. In the determination of step S8, the recording information SR is continuously transmitted from the host computer 14.
Is not transmitted and the data amount of the buffer memory 10 is equal to or lower than the level B (step S8; NO), it is determined that the buffer memory 10 is in an underrun state (FIG. 5).
(See (b)). Next, the pickup 2 is currently mounted on a DVD-R.
It is checked which position on the DVD-R1 is a recording position where data is recorded on the DVD-R1 (step S9). Then, it is determined whether or not the recording position is a predetermined position at which recording on the DVD-R1 should be temporarily suspended (step S).
10). In the present embodiment, the predetermined position at which the recording is interrupted in the case of the underrun is the second half of the second sync frame 42 from the beginning of the ECC block 30. Is located in the second half of the second sync frame 42 from the beginning of the ECC block 30 in step S10.
If the position is the predetermined position (step S
10; YES) Then, the recording is temporarily suspended in the latter half of the second sync frame 42 from the top of the ECC block 30 and the header H ′ indicating the second sync frame 42 is stored in a RAM (not shown) in the processor 8. (Random
Access memory), a timer (not shown) in the processor 8 is started, and the UR flag is set to "1" (step S11).

Here, the buffer memory 10 when executing the process of step S11 will be described with reference to FIG. 5B. In the second stage from the top in FIG. 5B, the buffer memory 10 extends to the point (C). When the recording information SR is recorded in the buffer memory 10, it is assumed that it is detected that the buffer memory 10 underruns (step S8; N
O), the processor 8 controls the pickup 2 and the like,
In FIG. 5B, the recording operation is temporarily interrupted while the encode signal SRE up to the point (B) at the second stage from the top (the latter half of the second sync frame 42 from the beginning of the ECC block 30) is recorded. (Step S11). At this time, on the DVD-R1, the recording has been performed up to the position corresponding to the point (B), as shown in the lowermost part of FIG. 5B. The buffer memory 10 has an EC
Second sync frame 42 from the beginning of C block 30
Of the first half (for example, the point (A) in the second row from the top in FIG. 5 (b)) to the point (C) in the second row from the top in FIG. 5 (b) are stored. I have.

When the recording is temporarily interrupted (step S11), the timer started in step S11 sets the host computer 14 in a hang-up state (due to a trouble of the CPU or the like in the host computer 14).
Trouble state where record information SR cannot be transmitted)
It is determined whether or not a reference time C has been reached (step S12). If not (step S12; NO), the transfer of the record information SR from the host computer 14 is restarted. It is determined that there is a possibility that the data has been lost, and the process returns to step S4 to check the amount of data in the buffer memory 10. Next, when the transfer of the record information SR from the host computer 14 has not been resumed,
Since step S5 becomes "YES", step S12 is performed.
Then, check the timer value again. If the transfer of the record information SR from the host computer 14 is not restarted until the timer reaches the value C (step S1).
2; YES), there is a high possibility that the host computer 14 has hung up,
, An error signal SE indicating that the possibility of hang-up is high is output (step S13), and the process ends.

On the other hand, once the buffer memory 10 under-runs, the transfer of the recording information SR from the host computer 14 is resumed before the timer reaches the value C, and when the buffer memory 10 is full, In FIG. 5 (a), reference numeral (f)), in the determination in step S5, "N
"O", it is next determined in step S6 whether or not the amount of data in the buffer memory 10 is greater than level A. Since the buffer memory 10 is currently full (step S6; YES), then It is determined in step S14 whether or not the UR flag is "1". When the data amount recovers after the buffer memory 10 has once underrun, the UR flag is "1" (step S14). S14; YES), the UR flag is initialized (step S17), and when the recording is restarted, the sync frame 42 (EC) in which the recording stored in the RAM (not shown) in the processor 8 is interrupted.
Second sync frame 4 from the top of C block 30
2) The header H 'is read out, and the recording is resumed from the beginning of the sync frame 42 read from the RAM including the position where the recording was interrupted (point (B) in FIG. 5 (b)). To this end, it is determined whether or not the recording position of the above-described pickup 2 is at the connection position which is the head position of the second sync frame 42 from the head of the ECC block 30 (step S18). (Step S18; YES) Recording is resumed as it is (Step S20). If the recording position is different from the connection position (Step S18; NO), the position of the pickup 2 is changed to the head position (connection position) of the sync frame 42. ) (Step S19), and the recording is resumed (step S20, see the part (a) in FIG. 5A)).

At this time, when the recording is restarted in step S20, the buffer memory 10
Of the remaining recording information SR (recording information SR corresponding to points (A) to (C) in the second row from the top in FIG. 5B) is stored.
The recording information SR after the transfer has been resumed from the above is added to form a series of recording information SR, and an encode signal SRE corresponding to the series of recording information SR is generated in the second sync frame 42 from the top of the ECC block 30. It is recorded again from the beginning (see the third row from the top in FIG. 5B). At this time,
On the DVD-R1, as shown at the bottom of FIG. 5B, the position corresponding to the point (B) from the beginning of the second sync frame 42 from the beginning of the ECC block 30 is
The encode signal SRE is overwritten, and the data is destroyed in this portion (the data destruction area D at the lowermost stage in FIG. 5B). Since this is an area within the sync frame 42, the recorded information is within the range of error correction at the time of reproducing the recorded information, and there is no possibility of erroneous reproduction at the time of reproduction.

When recording is resumed in step S20, the amount of data in the buffer memory 10 is confirmed again, and the process returns to step S4 to prepare for an underrun. Also,
Even if the data amount of the buffer memory 10 is equal to or less than the level A in the determination in step S6 (step S6; NO).
Subsequent data transfer request command SQ (Step S7)
If the data amount exceeds the level B due to the transfer of the recording information SR from the host computer 14 (step S8; YES), the flow shifts to step S14 to execute the recording again.

Further, in the determination in step S10, the recording position of the pickup 2 is set to the predetermined position (E) even though the buffer memory 10 is underrun.
Second sync frame 4 from the top of CC block 30
2 (the latter half of 2) (Step S10; N)
O), the process proceeds to step S14 to continue the recording until the recording position reaches the predetermined position.

On the other hand, in step S14, if the underrun has not occurred or it has been resolved even if it has occurred, the UR flag is not "1" (step S14; NO). Then, the recording of the encode signal SRE is continued (step S15). Next, it is determined whether or not the transfer of the record information SR is completely completed by the end command of the record information SR from the host computer 14 (step S16). If the recording has been completed (step S16; YES), the recording process is terminated. If the transfer of the recording information SR has not been completed (step S16; NO), the recording operation is continuously performed and the buffering is performed. After confirming the amount of data in the memory 10, the process returns to step S4 to prepare for an underrun.

In the flowchart shown in FIG. 4, in the normal case where no underrun occurs, steps S1, S2, S3, S4, S5, S6 (or S8), S8
14, the processing of S15 and S16 will be repeated.

As described above, according to the recording operation of the embodiment, when the amount of data in the buffer memory 10 becomes less than the predetermined level B, the second sync frame 42 from the top of the ECC block 30 Recording is temporarily stopped in the latter half, and when the data amount recovers to level B (or level A) or more, recording is restarted from the head of the second sync frame 42 from the head of the ECC block 30. Even if the amount of data in the buffer memory 10 decreases due to the underrun of the information SR, the DVD-
When reproducing the encoded signal SRE recorded on R1, continuity can be ensured, and accurate reproduction can be performed.

Since recording is restarted from the beginning of the second sync frame 42 from the beginning of the ECC block 30, the recording information SR (encoded signal SRE) can be continuously recorded on the DVD-R1, and the DVD-R1
There is no wasted recording area.

Further, since the range in which the encode signal SRE is superimposed and recorded is only within one sync frame 42,
It becomes easy to correct errors during reproduction. Further, since the recording information SR is output from the host computer 14, the recording information SR is interrupted due to a trouble in the host computer 14, and even if the generation of the encoding signal SRE is interrupted, the encoding signal SR Can be recorded continuously.

Further, after the processor 8 stops recording the encode signal SRE and transmits the error signal SE to the host computer 14 when the data amount in the buffer memory 10 remains below the level B, The host computer 14 can be recognized as being in an error state.

In the above embodiment, the ECC
The recording was interrupted in the second sync frame 42 from the beginning of the block 30 and the recording was restarted from the beginning of the sync frame 42. However, the present invention is not limited to this. If so, the recording may be resumed by overwriting a sync frame a plurality of sync frames earlier than the sync frame 42 where the recording was interrupted. In this case, the sync frame 42 that was being recorded when the recording was interrupted is stored in the processor 8, and when the recording is resumed, the sync frame 42 that is a plurality of sync frames earlier than the stored sync frame 42 is used as a reference. If the recording is resumed by overwriting from the frame 42 or the stored sync frame 42 itself, the ECC
Recording can be interrupted at any sync frame 42 within the range of the error correction capability at the time of reproduction of the block 30.

Further, in the above embodiment, the information recording apparatus S which temporarily stores the recording information SR in the buffer memory 10 and reads it out to generate the ECC block 30 and performs interleaving and the like is provided. The case where the present invention is applied has been described. However, the present invention is not limited to this. After generating and interleaving the ECC block 30 for the recording information SR, the recording information SR is temporarily stored in the buffer memory 10 and then recorded on the DVD-R1. The present invention can also be applied to an information recording device having the configuration.
In this case, the buffer memory 10 stores the encode signal SRE.

In the above embodiment, the DVD
-The case where information is recorded in R1 has been described. However, the present invention is not limited to this, and the present invention can be applied to a hard disk device or a flexible disk device if recording information divided into recording units such as a sync frame. It can be widely applied to this.

[0058]

As described above, according to the present invention,
The detecting means detects the storage amount of the record information in the buffer means, and stops the recording of the record information when the storage amount detected by the stop means becomes equal to or less than a predetermined storage amount. Furthermore, since the recorded information is stored in the storage means, it is easy to increase the accuracy of the continuity between the additionally recorded information and the previously recorded information when additional recording is performed after the underrun is resolved. Become.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of an ECC block in recording information according to an embodiment, (a) is a diagram showing a data structure of recording information, and (b) is a diagram showing a configuration of an ECC block.

FIG. 2 is a diagram illustrating a physical format of recording information according to the embodiment.

FIG. 3 is a block diagram illustrating a schematic configuration of an information recording device.

FIG. 4 is a flowchart showing a process of an information recording operation.

5A and 5B are diagrams showing a state of a buffer memory and data during an information recording operation, FIG. 5A is a diagram showing a transition of a data amount in the buffer memory, and FIG. 5B is a diagram showing a state of data during a recording operation; FIG.

[Explanation of symbols]

 Reference Signs List 1 DVD-R 2 Pickup 3 Reproduction amplifier 4 Decoder 5 Prepit signal decoder 6 Spindle motor 7 Servo circuit 8 Processor 9 Encoder 10 Buffer memory 11 Power control circuit 12 Laser drive circuit 20 Data sector 21 ... ID information 22 ... ID information error correction code 23 ... Spare data 24, 41, 43 ... Data 25 ... Error detection code 30 ... ECC block 31 ... ECC inner code 32 ... ECC outer code 33 ... Data block 34 ... Correction Block 40: Recording sector 42: Sync frame B: Light beam H, H ': Header D: Data destruction area SR: Recording information SE: Error signal SQ: Data transfer request command SS: Data transfer stop command SC: Buffer control signal SRE … Encoding signal SD… Drive Signal SDL ... laser driving signal SDT ... detection signal SOT ... reproduced signal SP ... amplified signal SPP ... pre-pit signal SDM ... demodulated signal SSD ... servo demodulation signal SPD ... demodulated pre-pit signal SSP ... pickup servo signal SSS ... spindle servo signal

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 20/10 G11B 19/00-19/16 G11B 27/00 H04N 5/92 G06F 3/06

Claims (17)

(57) [Claims] A buffer for temporarily storing recording information to be recorded;
Means for reading the recorded information and reading the recorded information
An information recording device for recording information in said buffer means , wherein a storage amount of said recording information in said buffer means is detected.
Detecting means for determining whether the detected storage amount is equal to or less than a predetermined storage amount.
When the value falls below, a predetermined information unit in the recording information is used.
That a predetermined stop means for stopping the recording at the position, and a said information recording medium to record information recorded in a previously recorded information storage means for storing just before the recording stop, the predetermined position is the It is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
An information recording device characterized by restarting the process. 2. A buffer for temporarily storing recording information to be recorded.
Means for reading the recorded information and reading the recorded information
An information recording apparatus for recording an underrun in said buffer means.
Means, predetermined information in the recorded information when an underrun is detected
Stopper to stop recording at a predetermined position in the unit
And a storage means for storing already recorded information which is recording information recorded on the information recording medium immediately before the stop of recording, wherein the predetermined position is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
An information recording device characterized by restarting the process. 3. A buffer for temporarily storing recording information to be recorded.
Means for reading the recorded information and reading the recorded information
An information recording device for recording information in said buffer means , wherein a storage amount of said recording information in said buffer means is detected.
Detecting means for determining whether the detected storage amount is equal to or less than a predetermined storage amount.
When the value falls below, a predetermined information unit in the recording information is used.
Comprising a stop means for stopping the recording and detecting the predetermined position that, and storage means for storing the recorded information is a recording information recorded on the information recording medium immediately before the recording stop, the predetermined position Is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
An information recording device characterized by restarting the process. 4. A buffer for temporarily storing recording information to be recorded.
Means for reading the recorded information and reading the recorded information
An information recording device for recording information in said buffer means , wherein a storage amount of said recording information in said buffer means is detected.
Detecting means for determining whether the detected storage amount is equal to or less than a predetermined storage amount.
When it becomes the lower, provided with a stop means for stopping the recording, and storage means for storing the recorded information is a recording information recorded on the information recording medium immediately before the recording stop, the already recorded information The following information, not yet recorded
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording device characterized by recording. 5. A buffer for temporarily storing recording information to be recorded.
Means for reading the recorded information and reading the recorded information
An information recording apparatus for recording an underrun in said buffer means.
Means for stopping recording when an underrun is detected
And storage means for storing recorded information that is recorded information on the information recording medium immediately before the stop of recording, and information subsequent to the recorded information that has not been recorded yet.
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording device characterized by recording. 6. A buffer for temporarily storing recording information to be recorded.
Means for reading the recorded information and reading the recorded information
An information recording device for recording information in said buffer means , wherein a storage amount of said recording information in said buffer means is detected.
Detecting means for determining whether the detected storage amount is equal to or less than a predetermined storage amount.
When it becomes the lower, provided with a stop means for stopping the recording, and storage means for storing the recorded information is a recording information recorded on the information recording medium immediately before the recording stop, the already recorded information The following information, not yet recorded
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording device characterized by recording. 7. A method according to claim 7, wherein said stopping means stops recording.
Performed at a predetermined position in a predetermined information unit in the recorded information.
The method according to any one of claims 4 to 6, wherein
Information recording device. 8. The method according to claim 1, wherein the predetermined information unit is a frame.
The information according to any one of claims 1 to 7, characterized in that:
Recording device. 9. The head according to claim 1, wherein the predetermined information unit includes position information.
And a data section.
An information recording device according to any one of 1, 2, 3, 7, and 8
Place. 10. The storage means also serves as the buffer means.
10. A method according to claim 1, wherein
An information recording device according to any one of the above. 11. The method according to claim 11, wherein the detected storage amount is a predetermined storage amount.
After the second storage amount, which is larger than the storage amount, becomes greater than or equal to the second storage amount,
Recording restart means for restarting recording on the information recording medium.
11. The information recording apparatus according to claim 1, wherein:
Place. 12. Recording information to be recorded is temporarily buffered.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising detecting a storage amount of the recording information in the buffer means.
Detecting that the detected storage amount is equal to or less than a predetermined storage amount.
When the value falls below, a predetermined information unit in the recording information is used.
A stopping step of stopping recording at a predetermined position, and a storing step of storing recorded information which is recording information recorded on the information recording medium immediately before the recording is stopped, wherein the predetermined position is It is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
The information recording method characterized by restarting the information recording. 13. Temporarily buffering recording information to be recorded.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising: detecting an underrun in the buffer means.
And predetermined information in the recorded information when an underrun is detected.
Stop work to stop recording at a predetermined position in the unit
And a storage step of storing recorded information that is recorded information on the information recording medium immediately before the stop of recording, wherein the predetermined position is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
The information recording method characterized by restarting the information recording. 14. Recording information to be recorded is temporarily buffered.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising detecting a storage amount of the recording information in the buffer means.
Detecting that the detected storage amount is equal to or less than a predetermined storage amount.
When the value falls below, a predetermined information unit in the recording information is used.
A stopping step of stopping recording when a predetermined position is detected, and a storing step of storing already-recorded information that is recording information recorded on the information recording medium immediately before the recording is stopped, wherein Is an intermediate part of the predetermined information unit,
And recording from within the predetermined information unit including the predetermined position
The information recording method characterized by restarting the information recording. 15. Recording information to be recorded is temporarily buffered.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising detecting a storage amount of the recording information in the buffer means.
Detecting that the detected storage amount is equal to or less than a predetermined storage amount.
When it is below, a stop step of stopping recording, and a storage step of storing recorded information that is recorded information on the information recording medium immediately before the recording is stopped, and The following information, not yet recorded
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording step characterized by recording. 16. Temporarily buffering recording information to be recorded.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising: detecting an underrun in the buffer means.
And a stop step for stopping recording when an underrun is detected
And a storage step of storing recorded information, which is recording information recorded on the information recording medium immediately before the stop of recording, and information subsequent to the recorded information, which has not been recorded yet.
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording method characterized by recording. 17. Temporarily buffering recording information to be recorded.
Storage means, read the recorded information, and read the information recording medium.
An information recording method for recording on a body, comprising detecting a storage amount of the recording information in the buffer means.
Detecting that the detected storage amount is equal to or less than a predetermined storage amount.
When it is below, a stop step of stopping recording, and a storage step of storing recorded information that is recorded information on the information recording medium immediately before the recording is stopped, and The following information, not yet recorded
Interleaving using unrecorded information and the recorded information
The recorded signal is recorded on the information recording medium when recording is resumed.
An information recording method characterized by recording.