JP3296360B2 - Optical disk recording method and apparatus therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording apparatus for recording information on an optical disk of the WO (write once, write-once) type or the like, which prevents recording failure.

[0002]

2. Description of the Related Art In the case of recording music on a WO disk, conventionally, a recording operation is performed on a WO disk recording device side and a reproducing operation is simultaneously performed on a reproducing device side, so that these are activated at the same time, and the reproducing device side operates. The reproduced music is recorded on the WO disk recording device side.

[0003]

However, when recording is started by simultaneously starting the above, a song different from the song to be recorded may be reproduced due to a reproduction operation error or the like, or may be reproduced from the middle of the song. Recording may fail due to abnormally long head blank periods. In such a case,
Since WO disks cannot be erased, they had to be discarded as failures. SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disk recording apparatus which solves the problems of the conventional technique and prevents recording failure.

[0004]

According to the optical disk recording method of the present invention, information is input, the input information is sequentially written to temporary storage means, and writing of the input information to the temporary storage means is continued by a disk recording start command. While reading the input information already written in the temporary storage means, the read input information is recorded at a predetermined recording start position on the optical disk, and the recording is not performed.
The time between the write information and the read information of the primary storage means.
The rate at which the input information is read from the temporary storage means is temporarily made faster than the rate at which the input information is written to the temporary storage means , so that the difference gradually decreases as compared with the beginning of recording. Is what you do.

[0005] An optical disk recording apparatus according to the present invention includes an information input means for inputting information, a temporary storage means for temporarily storing and holding the input information, and a disk for instructing a start of recording the input information on the optical disk. Recording start command means and the input information are sequentially written to the temporary storage means, and by the disk recording start command from the disk recording start command means, the input information is written to the temporary storage means while continuing to write to the temporary storage means. While reading the input information already written ,
While writing, the write information and read information of the primary storage
The time difference of the report gradually narrows compared to the beginning of recording
A temporary storage means for controlling to temporarily make a rate at which the input information is read from the temporary storage means faster than a rate at which the input information is written to the temporary storage means; Disc recording control means for recording the input information read from the means at a predetermined recording start position of the optical disc.

According to this invention, the input information is stored in the temporary storage means, and during that time, it is checked whether the information is correct. If it is determined that the information is correct, the information read from the temporary storage means is stored on the optical disk. Therefore, when it is determined that there is an error in the input information, the recording can be stopped before the recording on the optical disk is started, the recording failure can be prevented, and the WO disk can be recorded. In this case, disc waste can be reduced.

While recording, the primary storage means
The time difference between the write information and the read information is
So that the read rate of the temporary storage means is temporarily made faster than the write rate so that
The time difference between the write information and the read information in the temporary storage means can be gradually reduced, and the delay time at the end of recording can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 2 shows the overall configuration of an optical disk recording / reproducing apparatus to which the present invention is applied. Here, the optical disc 10 is a CD-WO disc (W of the compact disc standard).
O disk). The optical disk 10 is driven by a disk motor 12, and information is recorded and reproduced by an optical head 13. The optical head 13 is driven by a feed motor 20 in the radial direction of the disk.

The disk servo circuit 16 controls the rotation of the disk motor 12 at a constant linear velocity according to a command from a system controller 19. This constant linear velocity control is performed by C
In the case of the D-WO standard, the pre-group wobble (Wobb
le) is determined to be 22.05 kHz, so that the wobble is detected from the output signal of the optical head 13 (it can be detected from the remaining tracking error signal), and the disk motor is controlled to reach 22.05 kHz. 12 is realized by PLL control.

The focus servo and tracking servo circuit 18 controls the focus and tracking of the laser beam 11 emitted from the semiconductor laser in the optical head 13 according to a command from the system controller 19. The tracking control is performed by detecting a pre-groove formed on the disk 10. The feed servo circuit 17 drives the feed motor 20 to move the optical head 13 in the radial direction of the disk 10 according to a command from the system controller 19.

A music signal output from an analog source device 34 (for example, an analog tape recorder) or a digital source device 36 (for example, a digital tape recorder) is reproduced by a speaker 44 via an amplifier 42. These music signals are input via the input terminal 38. The analog input is converted to a digital signal by the A / D converter 23. Buffer memory 40 (for example, RAM)
Temporarily stores, delays and outputs an input music signal in response to a write and read command from the system controller 19.

The music signal read from the buffer memory 40 is input to the data signal forming circuit 22. The data signal forming circuit 22 interleaves the input data to give an error check code, and also gives the TOC and the subcode information generated by the subcode generating circuit 23, performs EFM modulation, and performs a CD standard format. Form and output a series of serial data.

The data undergoes necessary modulation by a data signal correction circuit 26 via a drive interface 15 and is input to a laser generation circuit 25. The laser generation circuit 25 drives the semiconductor laser in the optical head 13 according to the data signal to irradiate the recording surface of the optical disk 10 with laser light to form pits for recording. At this time, the laser power is controlled with high precision to the power specified by an ALPC (Automatic Laser Power Control) circuit. As a result, data is recorded on the optical disc 10 in the format, transfer speed and linear speed (1.2 to 1.4 m / s) of the CD standard. Optical disc 10 recorded as described above
When the reproduction is performed by irradiating the reproduction laser beam (lower power than the recording laser beam) to the reproduction data, the read data is transmitted to the signal reproduction processing circuit 30.
And demodulated as a digital signal,
The signal is converted into an analog signal by the A converter 32 and output.

The input device 28 is for inputting various commands to the optical disk recording / reproducing device by a user's operation. As a part related to the present invention, there are a recording start button 46, a recording stop button 48 and the like. As the recording start button 46 and the recording stop button 48, a recording button and a stop button which are usually prepared can be used. The timer 50 is used to measure the time from when the recording start button 46 is turned on to when the recording of the optical disk is automatically started. The display 52 is used to display the remaining time until automatic start and the like.

FIG. 1 shows a control block configuration for realizing the present invention by the optical disk recording / reproducing apparatus shown in FIG.
Input information (music signal) is written to a buffer memory 40 via an input terminal 38 (information input means) 38. The information read from the buffer memory 40 is input to the disk recording unit 56 via the signal processing unit 54 (the circuits 22, 23, 15, 26 and the like in FIG. 2), and is recorded on the optical disk 10.

The buffer memory write start command means 58
A signal for instructing the start of writing to the buffer memory 40 is output by a user's operation. The disk recording start command means 60 stores the data temporarily stored in the buffer memory 40 by user operation or when the timer 50 finishes counting a predetermined time after a write command to the buffer memory 40 is given. A command to start reading and recording on the optical disk 10 is output. In this embodiment, the buffer memory write start command means 58 is constituted by the recording start button 46 shown in FIG. The disk recording start command means 60 comprises the recording start button 46 and the timer 50 shown in FIG. In other words, if the recording start button 46 is pressed again before the timer 50 finishes counting a predetermined time after the recording start button 46 is first pressed and writing to the buffer memory 40 is started, disc recording is started at that point. If the recording start button 46 is not pressed again before the command is output and the counting is completed, a disc recording start command is output at the time when the counting is completed.

The recording stop command means 48 corresponds to the recording stop button 48 shown in FIG. 2, and is input during a period from the start of writing to the buffer memory 40 to the end of counting of a predetermined time by the timer 50. By doing so, it is possible to stop the output of the disc recording start command and stop the recording on the optical disc 10.

Note that the set time of the timer 50 can be set to be slightly longer than the time from when the recording start button 46 is first pressed until the user notices that the start has been mistaken. That is, the reproduction of the reproduction source device 34 is started almost simultaneously with the first input of the recording start button 46, and if the reproduced sound reproduced by the speaker 44 is heard, it is determined within a few seconds whether or not the recording can be directly recorded on the optical disk 10. Since it can be determined, the set time of the timer 50 can be set to, for example, about 3 to 10 seconds.
The buffer memory 40 has a capacity capable of holding input information for a set time of the timer 50.

The buffer memory write / read control means 62 and the disk recording control means 64 are constituted by the system controller 19 shown in FIG. The buffer memory write / read control means 62 controls the write / read of the buffer memory 40. When a write start command is given, the buffer memory write / read control means 62 stores the input information in the buffer memory 4.
0 is sequentially written from the first address. When a disk recording start command is subsequently given, the buffer memory 40 continues writing to the buffer memory 40.
Is sequentially read from the first address (that is, the oldest one). When writing to the buffer memory 40 reaches the last address, the process returns to the first address, and the old information (already read out) is erased and rewritten with new information.

When a disc recording start command is given, the disc recording control means 64 controls the disc recording unit 56 to start recording information read from the buffer memory 40 on the optical disc 10. When the disc recording end command means 66 (a stop button included in the input device 28 in FIG. 2) is turned on, the recording ends.

The buffer memory write / read control means 62 shortens the delay time of input information in the buffer memory 40 by setting the read rate higher than the write rate for a predetermined time after the start of recording on the optical disk 10. be able to. At this time, the disk recording control means 64 increases the linear velocity of the disk by the increased read rate.

FIG. 3 shows a control flow at the time of recording of the optical disk recording / reproducing apparatus of FIG. 2 according to the control configuration of FIG. 1 described above. When the recording start button 46 is first turned on (S
1) Input information is sequentially stored in the buffer memory 40 (S2). At this time, since the input information is reproduced by the speaker 44, it is possible to determine whether or not the desired input information is correctly input by listening to the input information.

If it is determined that the input information has been correctly input, the recording start button 46 is turned on again (S3) to start recording on the optical disk 10 (S4). Even if the recording start button 46 is not turned on again, if the set time of the timer 50 (for example, 3 to 10 seconds) is finished (S6), the recording on the optical disc 10 is started (S4). If it is determined that the input information has not been correctly input, the recording stop button 4
By inputting 8 (S5), the start of recording on the optical disk 10 can be stopped (S7). When the recording is stopped, the recording returns to the initial state, so that the recording can be started again. Since the remaining time until the start of recording on the optical disk 10 is displayed on the display 52, it is sufficient to determine whether to start or stop the recording until the time reaches zero.

When the recording on the optical disk 10 is started (S4), the input information is read from the buffer memory 40 in the oldest order, and the recording start position on the optical disk 10 (the start position of the program area or the recording has already been completed halfway). , The recording is started from the program area unrecorded portion start position). When recording on the optical disk 10 is started, the recorded information in the buffer memory 40 is sequentially rewritten with new information. Also, for a certain period of time after the recording on the optical disc 10 is started, the buffer memory 40
By making the read rate of the buffer memory faster than the write rate and increasing the linear velocity of the disk 10 in accordance with the read rate, the time difference between input and output of the buffer memory 40 is reduced. At this time, the power of the recording laser light is changed according to the linear velocity. That is, the laser beam power is controlled to increase as the linear velocity increases. When recording is performed on the optical disk 10, the start time (time from the program area start position) of each music is sequentially stored in a TOC memory (not shown), and the TOC after the end of the recording is stored. It is used for generating information (table of contents information).

When the recording of all desired songs is completed and the stop button is pressed (S8), new writing to the buffer memory 40 is stopped, and only reading of the information remaining in the buffer memory 40 is continued. When the reading is completed, the recording on the optical disk 10 is completed (S9). Since the time difference between the input and output of the buffer memory 40 has been reduced by the control to recover the delay, the recording operation will be completed soon after the end operation.

When the recording is completed, the start time information of each music is read from the TOC memory, the TOC information is generated by the TOC and subcode generation circuit 23, and the TOC information is recorded in the TOC area of the lead-in area of the optical disk 10 (S10). ) End all recording (S11). If the recording ends in the middle of one disc and additional recording is planned, the start time information, the number of songs, the time information immediately before the unrecorded part, etc. are read in. By recording in a memo further on the inner side than the area, when additional recording is performed, this is read first and used for reading control of the additional recording start position, or finally, all recordings on one disc are recorded. It can be used to generate the TOC information when the process is completed. The TOC information is, for example, the diameter 4 on the inner circumference side of the disc.
The data is written in a portion of 6 mm to 50 mm, and generally takes 2 to 3 minutes at a normal speed. In addition, when recording TOC information, it is not necessary to read out the recording information from the source device, so that high-speed processing is essentially possible. Therefore, recording should be performed at as high a speed as possible to save the required time. That is, it is desirable that these TOC information and memo information be recorded at a speed two to four times as fast as a normal recording speed.

FIG. 4 shows an example of a recording operation by the above control. (A) is an operation in the case where the delay recovery control in the buffer memory 40 is not performed. The operation proceeds while the time difference between the input information of the buffer memory 40 and the information recorded on the optical disk 10 is constant. When the recording end operation is performed, the recording on the optical disc 10 ends after waiting for the time difference (that is, waiting for the buffer memory 40 to be empty).

FIG. 4B shows the operation when the delay recovery control is performed.
The time lag of the recorded information to the computer gradually decreases. The readout rate of the buffer memory 40 and the linear velocity of the optical disk 10 during the delay recovery control are, for example, 10 to 20 times higher than usual.
% Increase can be set. Then, when the time difference is reduced, the readout rate and the linear velocity 10 are gradually brought close to the normal speed, and are returned to the normal speed when the time difference is about 0.5 seconds, for example. In this way, the actual recording can be terminated almost simultaneously with pressing the stop button.

In the above-described embodiment, the actual recording on the optical disk 10 is automatically started when the set time of the timer 50 ends, but the actual recording on the optical disk 10 is automatically started when the set time ends. (That is, even if the recording start button 46 is turned on again, actual recording is not started). In addition, the usage of the buffer memory 40 may be monitored in place of the timer 50, and the actual recording may be automatically started or stopped immediately before the overflow. Even if the recording start button 46 is turned on and the buffer memory 40 overflows after the recording start button 46 is turned on, the user himself / herself presses the recording stop button 48 even if the user does not have the function of automatically starting or automatically stopping the actual recording. It is possible to return (that is, the recording start button 46 has not been turned on). In this case, if the remaining time until the buffer memory 40 overflows is displayed, the buffer memory 4
It is possible to prevent the actual recording from being erroneously started after 0 overflows.

In the above embodiment, the buffer memory 40
Although one button 46 is used to instruct the start of writing to the optical disk 10 and the start of recording to the optical disk 10, they may be separately prepared. In the above embodiment, the case where the present invention is applied to the recording of a WO disk has been described. However, when the present invention is applied to a rewritable optical disk, this can be stopped before the actual recording is started. The effect of avoiding recording can be obtained, and the effects such as saving the labor required for re-recording can be obtained.

In the above embodiment, the buffer memory 40
Although the operation of starting writing to the device and the operation of starting reproduction of the reproduction source device are performed separately, they can be linked by one operation. In the above embodiment, the case where the present invention is applied to the recording of music has been described, but the present invention can be applied to the recording of various information.

[Brief description of the drawings]

FIG. 1 is a control block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration of an entire CD-WO recording / reproducing apparatus to which the present invention is applied;

FIG. 3 is a diagram showing a recording control flow of the apparatus of FIG. 2 by the control configuration of FIG. 1;

FIG. 4 is a diagram showing an example of an actual recording operation according to the control flow of FIG.

[Explanation of symbols]

38: input terminal (information input means), 40: buffer memory (temporary storage means), 44: speaker, 58: buffer memory write start command means, 60: disk recording start command means, 62: buffer memory write and read control Means, 64... Disk recording control means

Claims (2)

(57) [Claims] An information is input, the input information is sequentially written to a temporary storage means, and the input information is already written in the temporary storage means while continuing to write the input information to the temporary storage means in response to a disk recording start command. reads the input information, it intends to record the read input information in a predetermined recording start position of the optical disc, the length subjected to the recording
The time between the write information and the read information of the primary storage means.
The rate at which the input information is read from the temporary storage means is temporarily made faster than the rate at which the input information is written to the temporary storage means , so that the difference gradually decreases as compared with the beginning of recording. Optical disk recording method. 2. An information input unit for inputting information, a temporary storage unit for temporarily storing the input information, a disk recording start instruction unit for instructing a start of recording of the input information on the optical disk, The input information is sequentially written to the temporary storage means, and the input information is already written in the temporary storage means while the writing of the input information to the temporary storage means is continued by the disk recording start command from the disk recording start instruction means. While reading the input information and performing the recording,
The time difference between the write information and the read information of the primary storage means is
Temporary storage means for controlling the rate at which the input information is read from the temporary storage means to be temporarily faster than the rate at which the input information is written to the temporary storage means, so that the rate at which the input information is read from the temporary storage means is gradually reduced as compared with the beginning of recording. An optical disc recording apparatus comprising: a write / read control unit; and a disc recording control unit that records the input information read from the temporary storage unit at a predetermined recording start position on the optical disc.