JPH0581771A - Optical disk device - Google Patents

Abstract

PURPOSE:To prevent record from disappearing by arranging a frame consisting of a pair of a first area consisting of continuous (m) pieces of a frame and a second area consisting of continuous (n) pieces of the frame continuing to the first area and recording on it. CONSTITUTION:Image data to be recorded is inputted to a block structurized circuit 114, is divided at every 2324 byte and made data for a user, the image data is inputted to a CIRC adding circuit 115 and added a CIRC to be a kind of an error correcting code. By using an optical disk recording device like this, by providing an unrecorded area after recording plural sub code frames and providing a record control means so as to record plural sub code frames as one unit, the disappear of information caused by the super-position of the recording marks of front and rear generated in the case of recording over plural times is prevented and an optical disk 1801 is applied to a use recording and erasing frequently like edition, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a spiral or concentric circular track in which frames composed of data strings are arranged and recorded, and position information designating the arrangement position of the frames is previously recorded in the tracks. The present invention relates to an optical disk device capable of recording data on an optical disk recorded by track modulation.

[0002]

2. Description of the Related Art Recently, a reproduction-only optical disc device for reproducing a compact disc (hereinafter referred to as a CD) in which an audio signal is recorded on an optical disc, an optical video disc in which an audio signal and a moving image signal are recorded on the optical disc, has been widely used. It is popular. Further, at present, research on an optical disk device capable of recording is actively conducted. For example, Japanese Patent Laid-Open No.
The optical disk device disclosed in −224929 is one of them.

Hereinafter, as a conventional example, the above-mentioned Japanese Patent Laid-Open No. 1-224 is used.
The optical disk device disclosed in Japanese Patent No. 929 will be described with reference to the drawings. 18 is a plan view showing a configuration of an optical disk used in the above-mentioned conventional optical disk device, FIG. 19 is a cross-sectional view of an essential part showing a part of a cross section taken along line ab of FIG. 18, and FIG. 20 is shown in FIG. 23 is an enlarged plan view of a main portion 1802, FIG. 21 is a waveform diagram showing a configuration of a position information signal in a conventional optical disk device, FIG. 22 is a schematic diagram showing a position code format in the position information signal, FIG. FIG. 6 is a block diagram showing a configuration of a conventional optical disc device. Optical disc 1 disclosed herein
Reference numeral 801 is suitable for recording an EFM signal used in an audio CD or a CD-ROM, and the light reflected from the optical disc indicates which part of the optical disc is scanned even before the EFM signal is recorded. It can be detected by the beam. The optical disc 1801 is provided with a spiral track 1803. The radial cross section is shown in FIG. In the figure, an optical disc 1801
Is a transparent substrate 1903 and a recording layer 1 formed thereon.
902 and a protective layer 1901 formed thereon. The light beam is applied to the base material 1903.
The tracks 1803 are formed in the shape of peaks or valleys, and EFM signals are recorded on the servo tracks 1803.

When the truck 1803 is viewed from above,
As shown in FIG. 20, track modulation is performed so that the track meanders, and position information is recorded by changing the frequency of this track modulation. Such track modulation is generally called wobble, and a track on which periodic track modulation is applied is called a wobbled track. The position information signal recorded on the track 1803 is composed of a position synchronizing signal 2101 and a position code signal 2102 as shown in FIG. Position code signal 21
02 is a biphase-mark modulated signal having a length of 76 channel bits, which carries a position code of 38 data bits. In FIG. 22, the position code is the same time code as the absolute time code recorded on the subcode Q channel of the EFM signal (minute, second, and subcode frame are each 8
Bit by bit) and error detection code (CRC, 14 bits)
And 38 data bits in total. One subcode frame has a time length of 1/75 second, and position information is recorded as a position information signal every 1/75 second. When scanning the optical disc 1801 with a light beam, it is possible to know which part of the optical disc 1801 is being scanned by detecting this position information signal.

The frequency band of the track modulation is E
Since the device is devised so as not to overlap the band of the FM signal, the position information signal can be read even if the EFM signal is recorded. One of the characteristics of the EFM signal is that there is no DC component, and in fact, the EFM signal does not have a frequency component below 100 KHz. On the other hand, since the track modulation is performed at 22.05 ± 1 KHz, both signals do not interfere with each other and both signals can be read at the same time.

FIG. 23 is a block diagram showing the structure of a conventional optical disk device provided with a means for recording data on the above-mentioned optical disk. In the figure, a clock generation circuit 2301 outputs a clock of 4.3218 MHz and a clock of 22.05 KHz generated based on the clock. 4.321
The 8 MHz clock is sent to the EFM modulation circuit 2305, while the 22.05 KHz clock is sent to the servo circuit 2.
It is sent to 306. At this time, the EFM modulation circuit 230
It should be noted that the phase relationship between the reference clock No. 5 and the reference clock of the servo circuit 2306 is fixed.

The recording / reproducing head 2311 is an optical disc 1801.
An RF signal is obtained by irradiating a light beam on the substrate and detecting the reflected light. This RF signal is an EFM demodulation circuit 230.
8 and a center frequency of 22.05 KHz are input to the band pass filter 2307. Band pass filter 2307
The signal passed through the servo circuit 2306 and the demodulation circuit 230
Entered in 2. In the servo circuit 2306, the RF signal that has passed through the bandpass filter 2307 is waveform shaped and converted into a pulse wave, and the frequency is lowered by a divider,
Similarly, a phase comparison is performed with a reference clock whose frequency has been lowered through a divider, and the spindle motor 2313 is controlled so that the phase difference becomes zero. The demodulation circuit 2302 FM demodulates the RF signal that has passed through the band pass filter 2307.
1 is detected, error detection is performed on the position code signal 2102 using the CRC code 2204, and a status signal and a position synchronization detection signal indicating that the position code in FIG. , Position code (2201, 2202 and 2203 in FIG. 22)
And output.

When data is recorded on the above optical disk,
The microcomputer 2303 drives the motor 2309 to rotate the rotary shaft 2310, thereby moving the recording / reproducing head 2311 in the radial direction and controlling the recording / reproducing head 2311 to reach the recording position. Whether it has arrived can be confirmed by monitoring the position code output from the demodulation circuit 2302. When the recording / reproducing head 2311 reaches the recording position, the microcomputer 2303 causes the track 1803
The value corresponding to the position code read from the counter 23
04, the recording / reproducing head 2311 is set to the write mode, and the operation of the EFM modulation circuit 2305 is started. The EFM modulation circuit 2305 uses a clock of 4.3218 NHz, which is a reference clock for EFM modulation, to generate 7
A clock of 5 KHz is generated, the value of the counter 2304 is incremented using the clock, and the value of this counter is used as the absolute time to be recorded in the subcode Q channel when the EFM signal is generated. The EFM modulation circuit 2305 EFM-modulates the supplied data and outputs it to the pulse modulation circuit 2312. Pulse modulation circuit 2312
NRZI modulates the EFM signal and outputs it to the recording / reproducing head 2311. The recording / reproducing head 2311 uses the servo track 1803.
Record the data in.

[0009]

In such a conventional optical disk device, since the position information signal recorded on the optical disk 1801 is recorded in the track 1803 in the form of FM modulation in an analog manner, the position information is recorded. It is difficult to accurately determine the phase relationship between the signal and the EFM signal to be recorded. The demodulation circuit 2302 FM demodulates the RF signal into a binary data string, detects the position information signal from the RF signal and demodulates the position code signal. As described above, the position information signal is a bit of the EFM signal. The rate is 4.3218
Since a carrier having a frequency of 22.05 Hz, which is considerably lower than MHz, is FM-modulated and recorded, 4.32 is used.
It is inferior to the judgment accuracy of 1 and 0 of 18 MHz, and the frequency of the RF signal also fluctuates due to jitter or eccentricity due to bit breaks, etc. Therefore, the phase relationship between the position information and the EFM signal, in other words, the relationship between the recording positions is accurate. Making a good decision becomes even more difficult.

This problem does not pose a problem in applications where data is recorded only once, such as copying one entire optical disc, but frequently writing data, such as editing using an optical disc, or It becomes a serious problem in applications such as erasing. That is, if the recording position is not fixed with respect to the position information signal, there is a risk that the preceding and following recording marks will overlap and data will be lost. Even when recording is performed a plurality of times, if the same optical disk device is used to perform a plurality of recording operations, it is possible to keep the deviation constant to some extent. , It is impossible to keep the deviation constant, and it is not practical.

A constant angular velocity recording method (CAV method)
Assuming that the same method as that of the conventional example (a method of providing a track subjected to track modulation and recording position information by changing the modulation frequency) is applied to the optical disk of FIG. Since the linear velocity is high, when writing with the same light beam intensity, there is a problem that the intensity is too strong in the inner peripheral portion to burn the optical disk and the intensity is too weak in the outer peripheral portion to record.

The present invention solves the above problems. Even if there is some deviation in the positional relationship between the track-modulated position information and the frame, the recorded portion may be partially lost by another recording operation. It is an object of the present invention to provide a non-existent optical disk device.

[0013]

In order to achieve the above-mentioned object, the present invention has a spiral or concentric circular track in which frames composed of a data string are recorded in an array, and the arrangement position of the frames is In an optical disk device capable of recording data in the frame by using an optical disk in which position information for specifying is previously recorded in the track by track modulation, a first frame composed of m consecutive frames (m: integer of 1 or more) And a second area consisting of n consecutive frames (n: an integer of 1 or more) following the first area are recorded in a unit of (m + n) frames. Recording management for recording data in the frame of the first area and recording control so that a blank area in which nothing is recorded is provided in a portion of the second area following the first area. And an optical disk apparatus having a stage.

[0014]

According to the present invention, in the above-mentioned structure, when the recording management means records the recorded portion continuously, the data is not recorded in the second area following the first area of the recorded portion, but additionally recorded. Even if the first area of the portion overlaps with the recorded second area due to displacement, the recorded data is not damaged.

[0015]

【Example】

(Embodiment 1) An optical disk device according to a first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an optical disc apparatus according to the first embodiment of the present invention, FIG. 2 is a schematic diagram showing the configuration of a subcode frame recorded in this embodiment, and FIG. 3 is data in a track. 6 is a timing chart showing the recording state of the recording medium. In FIG. 3, (a) is the position information signal recorded on the track, (b) is the frame synchronization generation signal generated by the EFM modulation circuit 15, and (c) is the recording / reproducing head 11.
1 shows the mode state, and (d) shows the recording state of the track.
FIG. 4 is a flowchart showing the operation of the microcomputer 13. In the present embodiment, a case will be described in which data (for example, image data) for which real-time property is not required is recorded.

CD-ROM for recording image data
Mode 2 Records data in a block structure in a format called form 2. The size of this block is one subcode frame. In FIG. 1, the image data to be recorded is input to the block structuring circuit 114 and is divided into 2324 bytes to be user data. As shown in FIG. 2, a flag indicating the type of data to be recorded is stored. A sub-header 23, a header 22 storing mode information indicating a block format and a block address, a reserved area 25, and a block synchronization signal 21 indicating the beginning of the block are added to form a block structure.
At this time, the added block address is used when accessing data and is an absolute time code calculated based on the count value generated by the counter 14.

The image data having the block structure as described above is input to the CIRC adding circuit 115, and CIRC which is one kind of error correction code is added. The processing contents of the CIRC adding circuit are described in, for example, "Illustrated Compact Disk Reader", Ohmsha, Ltd., pp. 103-110, and therefore their explanation is omitted. The image data to which the CIRC is added is input to the EFM modulation circuit 15, is EFM modulated, and is output to the pulse modulation circuit 112. In the EFM modulation circuit 15, 4.3218M from the clock generation circuit 11
EFM-modulate the input data using the Hz clock,
While outputting the FM signal to the pulse modulation circuit 112,
A subcode synchronization generation signal indicating that the subcode synchronization signal generated during EFM modulation has been generated is output to the microcomputer 13. At this time, the absolute time code recorded in the Q channel in the subcode added to the image data is calculated based on the count value output from the counter 14, and is the same as the block address. The subcode synchronization signal is created every 1/75 seconds based on the input reference clock (4.3218 MHz). The timing at which the subcode synchronization signal is generated is used as a reference for starting recording, which will be described later. Therefore, the subcode synchronization generation signal indicating the generation of the subcode synchronization signal is always irrespective of the instruction of the microcomputer 13. It is output to 13.
The pulse modulation circuit 112 outputs the input EFM signal to the NRZ
I-modulate and send to the recording / reproducing head 111.

The clock generation circuit 11 is 4.3218 MH.
z clock and obtained by dividing the clock by 196.
Outputs a 05 KHz clock. 44.3218MH
The z clock is input to the block structuring circuit 114, the CIRC adding circuit 115, and the EFM modulation circuit 15, and serves as a main clock that serves as a reference for the operation of each circuit. Also,
This clock is input to the frequency dividing circuit 118 and 57824.
The frequency is divided into a 75 KHz clock, and the counter 14
Is also used as a reference for the EFM-modulated subcode synchronization signal. The 22.05 KHz clock is input to the servo circuit 16 and serves as a reference clock for the rotary servo.

The optical disk 180 by the recording / reproducing head 11.
The RF signal read from No. 1 passes through the EFM demodulation circuit 18 and the bandpass filter 17 having a center frequency of 22.05 KHz, and becomes only the frequency component near 22.05 KHz.
The F signal is input to the servo circuit 16 and the demodulation circuit 12.

The servo circuit 16 converts the input RF signal into a pulse train whose waveform has been shaped, divides it by 16 to reduce the frequency, and then performs phase comparison. The reason for lowering the frequency here is to eliminate the influence of noise components in the high frequency range, so that only eccentricity (about 5 to 10 Hz), which is a problem in rotary servo, is followed. Also, an optical disc 1801
The position information signal is recorded by performing FM modulation on the track 1803, and also has a role of removing the frequency fluctuation component due to the recording of the signal. The servo circuit 16 changes the drive voltage or drive current output from the drive circuit according to the error signal obtained by the phase comparison described above, and controls the spindle motor 113.

The demodulation circuit 12 receives the RF signal that has passed through the band pass filter 17, FM demodulates it, and converts it into a data string consisting of 1s and 0s.
01 is detected and the subsequent position code signal error detection processing is performed, and a status signal and a position code indicating that there is no error in the detected position synchronization signal, that is, the reproduction synchronization signal and the position code signal, are sent to the microcomputer 14. Output.

The recording operation control of the microcomputer 13 will be described below with reference to the flowchart shown in FIG. The microcomputer 13 executes step 4
At 1, the start time and end time of the recording are obtained. The recording start time can be obtained by storing the data of the last frame previously recorded in the microcomputer 13 when writing is performed by the same device. In addition, the entire surface of the optical disc is scanned to detect an unrecorded area,
It is also possible to determine the recording start time. What is important here is that when the recording start time is set after the previously recorded area, the recording start time is set at a position separated by one subcode frame from the last part of the previously recorded area. .. The recording end time can be obtained by calculation. For example, the amount of data to be recorded is divided by the amount of data that can be recorded in one subcode frame (2324 bytes shown in the user data 24 in the embodiment), and the number obtained by multiplying this by 11/10 is the number of subcode frames required for recording. The recording end time can be calculated from this.

In step 42, the recording / reproducing head 11 is moved so as to scan the portion where the recording start time obtained in step 41 is recorded as the position information signal.
The recording / reproducing head 111 is moved by rotating the rotary shaft 110 using the traverse motor 19. The rotating shaft 110 has a thread, and by rotating this, the recording / reproducing head 111 continues to read the position information signal recorded on the track 1803 while moving in the radial direction of the optical disk. If the recording / reproducing head 111 has moved to some extent, the process proceeds to step 43 to wait for the input of the subcode synchronization generation signal. When the subcode synchronization generation signal is input, the optical disc 1 is continuously processed at step 44.
The position information obtained from the position code signal (31 in FIG. 3) read from 801 is fetched, and it is confirmed whether the position information fetched in step 45 matches the recording start time.

If they do not match, the process returns to step 42, the recording / reproducing head 111 is moved, and the position information is fetched. In this way, the above operation is repeated until the position information matches the recording start time. If they match, the process proceeds to step 46, the recording start time is set as the initial value of the counter 14, and the process proceeds to step 47 to execute the block structuring circuit 11
4, the operation of the CIRC adding circuit 115, the EFM modulating circuit 15 and the frequency dividing circuit 116 is started, and the recording / reproducing head 111 is set in the recording mode in step 48 to start recording (time point 32 in FIG. 3). The counter 14 uses the data received from the microcomputer 13 as an initial value, and the frequency dividing circuit 1
The count value is incremented with a clock of 75 KHz from 16, and the EFM modulation circuit 15 and the block structuring circuit 114 use this count value to create a block address and an absolute time code.

The image data to which CIRC is added by block structuring and which has been subjected to EFM modulation is NRZI modulated by the pulse conversion circuit 112, and the recording / reproducing head 111.
Is recorded on the track 1803. During recording, in step 49, the input of the subcode synchronization generation signal from the EFM modulation circuit 15 is waited, in step 410, the position information from the demodulation circuit 12 is captured and stored, and in step 411, the subcode synchronization generation signal is counted, and this signal is counted. Are repeated 10 times, steps 49 and 410 are repeated. When the subcode synchronization generation signal is detected 10 times (this indicates that 10 subcode frames have been recorded), the process proceeds to step 412, the recording / reproducing head 111 is set to the reproducing mode, and the process proceeds to step 413. And block structuring circuit 1
4, CIRC addition circuit 115 and EFM modulation circuit 15
To stop recording (time point 33 in FIG. 3).

In the next step 414, it is judged whether or not the position information fetched in step 410 is longer than the recording end time. If it is longer than the recording end time, the process proceeds to step 415 to end the recording operation. If it is less than the recording time, the process proceeds to step 415. Step 4
At 15, the sub-code synchronization generation signal is waited for input from the demodulation circuit 12, and if so, the process proceeds to step 417, where the block structuring circuit 114 and the CIRC addition circuit 11 are provided.
5 and the EFM modulator circuit is restarted and the process returns to step 48 (time point 34 in FIG. 3). After that, 10
After recording the sub-code frame (time point 35 in FIG. 3), the microcomputer 13 operates so as to perform recording while providing an unrecorded area (36 in FIG. 3) of one sub-code frame.

In the above operation, it is important that the operation of the frequency dividing circuit 116 is not interrupted. The output of the frequency dividing circuit 116 constantly increments the counter 14, and the count value output by the counter 14 is recorded as it is.
The absolute time code in the M signal. Optical disc 1801
Is rotating even when recording is interrupted, and the position information read by the recording / reproducing head 111 is incremented regardless of whether or not recording is being performed. Therefore, by operating the frequency dividing circuit 116 even while the recording is suspended, the position information recorded on the track 1803 and the absolute time code in the EFM signal to be recorded can be matched. Even if recording is performed a plurality of times, it is possible to prevent the EFM signal having the same absolute time code from being recorded, and it is possible to reliably access the data during reproduction.

As described above, according to the optical disc recording apparatus of the first embodiment of the present invention, an unrecorded area is provided after recording a plurality of subcode frames, and the plurality of subcode frames are recorded as one unit. By providing such a recording management means, it is possible to prevent the loss of information due to the overlap of the recording marks before and after, which occurs when recording is performed a plurality of times, and to frequently edit the optical disk 1801 shown in FIG. It can be applied to applications such as recording and erasing. Also, by not stopping the counter that generates the absolute time code to be recorded on the optical disc even while the unrecorded area is being created, the absolute time code is unique within one optical disc, and multiple same addresses exist at the time of access. By doing so, troubles that occur can be prevented. Further, since the position information recorded by FM modulation in the portion where the EFM signal is recorded and the absolute time code in the EFM signal are almost the same, a coarse search is performed using the FM modulated position information, and a fine search is performed. Can be performed using the absolute time code in the EFM signal, which increases the degree of freedom in the configuration of the device.

(Second Embodiment) An optical disk device according to a second embodiment of the present invention will be described below with reference to the drawings. The second embodiment is an optical disk device for recording data such as audio information that requires real-time characteristics. In this embodiment, a case where audio data having the same structure and data rate as that recorded on an existing CD is recorded will be described as an example.

FIG. 5 is a block diagram showing the configuration of the optical disk device of the second embodiment of the present invention, and FIG. 6 is a flow chart showing the operation of the microcomputer 53. In FIG. 5, a CIRC adding circuit 115, a frequency dividing circuit 116, an EF
M modulation circuit 15, pulse modulation circuit 112, servo circuit 1
6, EFM demodulation circuit 18, traverse motor 19, rotary shaft 110, recording / reproducing head 111, and spindle motor 1
Reference numeral 13 is the same as the constituent element of the first embodiment, and the explanation thereof is omitted.

The optical disk device of this embodiment stores data in 1
After recording 0 frames, an unrecorded area of 2 frames is provided, and data having the same data rate as a CD and having real-time property is recorded. For that purpose, the number of rotations of the optical disk is increased by 12/10, and a buffer circuit 514 is provided to receive data input from the outside without omission. The clock generation circuit 51 is 51
Generates a clock of 86160Hz, and based on this, 26
A clock of 460 Hz is generated, and the buffer circuit 514, the CIRC demodulation circuit 115, the EFM modulation circuit 1 are respectively generated.
5, the frequency dividing circuit 116 and the servo circuit 16 are supplied. These frequencies are 12/1 of the frequency of the clock generated by the clock generation circuit 11 used in the first embodiment.
The frequency is 0 times.

The recording / reproducing head 111 scans the track 1803 while irradiating the optical disc 1801 with a light beam, converts the reflected light into an electric signal (RF signal), and outputs EF.
It outputs to the M demodulation circuit 18 and the band pass filter 57. The bandpass filter 57 has a center frequency of 26460 Hz, and the RF signal passed through the bandpass filter 57 is input to the servo circuit 16 and the demodulation circuit 52. The servo circuit 16 performs waveform shaping of the input RF signal, converts it into a pulse signal, and then divides it by 1/16. Further, the clock of 26460 Hz input from the clock generation circuit 51 is also divided by 16. This clock is used as a reference signal for the rotary servo. The servo circuit 16 compares the frequency of the divided RF signal with the phase of the reference clock, and changes the current or voltage of the drive circuit according to the phase difference to perform rotation servo of the spindle motor 113. The reference clock of the rotary servo and the center frequency of the bandpass filter 57 (both 26460 Hz) are the tracks 1803 at the normal CD linear velocity (1.2 to 1.4 m / s).
1 of the center frequency of track modulation (22.05 KHz)
It should be noted that the setting is 2/10. With this setting, rotation servo is performed so that the frequency of track modulation read from the optical disc 1801 becomes 26460 Hz, and the optical disc 1801 rotates at a linear velocity or data rate 12/10 times that of a normal CD. become.

Along with this, the demodulation circuit 52 is also changed to 2
The FM signal having a center frequency of 6460 Hz is demodulated. Furthermore, the CIRC addition circuit 115 and the EF
The clock supplied to the M modulation circuit 15 and the frequency dividing circuit 116 is also the bit rate (43218) of a normal CD EFM signal.
12/10 times of (MHz) (5186160Hz)
Therefore, the processing speed of the data to be recorded or the data rate can be recorded at a speed which is 12/10 times that of a normal CD.

The recording operation will be described below with reference to the flow chart shown in FIG. In FIG.
In step 61, the recording start time and the recording end time are obtained as in the first embodiment. Next, at step 62, the recording / reproducing head 11 is driven in the radial direction of the optical disk by using the traverse motor 19 and the rotating shaft 110 connected thereto, and moved to the vicinity of the portion where the recording start time is recorded as the position information signal. .. Then shift to step 63 and perform EF
The M-modulation circuit 15 waits for the input of the subcode synchronization generation signal output. This signal is generated every 1/90 second by a clock of 5186160 Hz and serves as a reference for timing of the subsequent recording, and the microcomputer 53 outputs the E signal.
It is always output even if the FM modulation circuit 15 is stopped.

Now, when the subcode synchronization generation signal is received, the process proceeds to step 64, the position information is fetched from the demodulation circuit 52, and in step 65 it is confirmed whether the position information coincides with the recording start time. If they do not match, step 6
Return to 2 and repeat the same operation. When the position information coincides with the recording start time, the process proceeds to step 66, the recording start time is set in the counter 14, and the process proceeds to step 67 to operate the CIRC addition circuit 115, the EFM modulation circuit 15 and the frequency dividing circuit 116. Let it start. When the buffer read is enabled in step 68, the CIR
The C addition circuit 115 reads the audio data from the buffer circuit 514, adds the CIRC, and outputs it to the EFM modulation circuit 16. Further, in step 69, the recording / reproducing head 11
Set 1 to the recording mode.

The EFM modulation circuit 15 EFM-modulates the received data and outputs it to the pulse modulation circuit 112. At this time, the absolute time code recorded in the subcode Q channel in the EFM signal is created based on the count value of the counter 14, and one subcode frame is generated every 1/90 seconds and a rate of 5186160 bits per second. Output the data. In the pulse conversion circuit 112, the input EFM signal is NRZI-modulated and input to the recording / reproducing head 111, and the recording / reproducing head 111 records audio data on the track 1803.

When the recording is started, the microcomputer 53 proceeds to step 610 to wait for the input of the subcode synchronization generation signal, and if the input is accepted, the step 6
In step 11, the position information is fetched from the demodulation circuit 52.
The position information acquired here is used in a later step. Next, in step 612, it is monitored whether or not the subcode synchronization generation signal has been counted 10 times since the recording was started. If it has not been counted 10 times, the process returns to step 610. If it is counted 10 times (that is, if step 610 is repeated 10 times), the process proceeds to step 613, the recording / reproducing head is set to the reproduction mode, the reading from the buffer circuit 514 is interrupted at step 614, and the CIRC is determined at step 615. Additional circuit 115, EFM
The operation of the modulation circuit 15 is stopped. Although the recording on the optical disc 1801 is temporarily interrupted by this operation, it should be noted that the audio data input from the outside is stored in the buffer circuit 514, and therefore no data is lost.

Now, when recording is interrupted, step 616
At, it is confirmed whether the position information fetched in step 611 has reached the recording end time. If it has reached, step 617 follows and the recording is ended. If it has not reached, the process proceeds to step 618, waits for the subcode generation signal to be input twice in order to generate an unrecorded area for two subcode frames, and if the second time is read, proceeds to step 619. Transition to buffer circuit 5
The data from 14 is enabled to be read, and in step 620, the CIRC addition circuit 115 and the EFM modulation circuit 1
5 is operated, the process returns to step 69, the recording / reproducing head is set to the recording mode, and recording is resumed.

The relationship between the absolute time code recorded on the subcode Q channel in the EFM signal to be recorded and the position information signal recorded in advance on the optical disc 1801 will be described. In the present embodiment, the reference signal for the rotary servo is set to 12/10 times that of a normal CD, and the reference signal of a normal CD is
The disk is rotated at a speed of 10 times, and the processing speed of recorded data is also increased to 12/10 times. From this, it can be seen that once recording is started, the phase relationship between the position information signal previously recorded on the optical disc 1801 and the EFM signal to be recorded later is fixed. Also, the frequency of the clock of the counter 14 is also increased by 12/10, and unless the counter 14 is reset based on the position information signal, the EFM signal having the same absolute time code on the same disk does not appear. This is important in data access as in the case of the first embodiment.

In the above description, the clock frequency is 12 /
Although the number of revolutions is increased by increasing the number by 10 times, the number of revolutions can also be increased by changing the magnification of the frequency divider in the servo circuit 16. For example, if the frequency division ratio of the RF signal is 1/12 with the frequency division ratio of the rotation servo reference clock being 1/10, the rotation speed of the optical disk is 12/10.
Double. However, by increasing the reference clock by 12/10, the operating speed of the EFM modulation circuit etc.
It becomes 0 times, and there is an advantage that the entire apparatus operates in synchronization without preparing other synchronization means.

Next, the relationship between the input voice data and the data rate of the recorded data will be described. In this embodiment, the data to be recorded is the same as that recorded on a normal CD. In order to record such data on the optical disc 1801 without excess or deficiency, the data rate of the data to be recorded on the optical disc 1801 is 10/12 that of the normal data. From this, the total data rate is the same as CD (data rate ratio x area utilization rate = 12/10 x 10/1).
2 = 1), it is possible to record data such as audio data in which the amount of data to be processed within a predetermined time with real-time property is fixed.

The arithmetic circuit 515 and the display circuit 516 shown in FIG. 5 will be described below. The arithmetic circuit 515 and the display circuit 516 are means for informing the user of the current recording time. As mentioned in the explanation above,
The optical disc 1801 rotates at a speed that is 12/10 times that of a conventional CD. Therefore, the minute / second frame indicated by the position information signal recorded on the track 1803 is incremented at a speed that is 12/10 times the actual flow.
On the other hand, it is convenient and intuitive for the user to manage the recording time based on the time that the actual clock ticks.
Therefore, an arithmetic circuit 515 that multiplies the position information output by the demodulation circuit 52 by 10/12 (arithmetic operation) and a display circuit 516 that displays this are provided, and the change time of the position information reproduced from the optical disc 1801 is calculated in the real world. By displaying the optical disc in accordance with the time interval engraved by the clock, it is possible to realize a more practical optical disk device that is convenient for the user.
Here, the position information demodulated by the demodulation circuit 52 is converted, but the recording position information generated by the counter 14 may be converted and displayed.

(Third Embodiment) An optical disk device according to a third embodiment of the present invention will be described below with reference to the drawings. The present invention adds a light beam intensity adjusting function to the optical disk recording apparatus of the first embodiment, and adjusts the light beam intensity in the vicinity of a recording area. Figure 7
Is a block diagram showing a configuration of an optical disk device of a third embodiment of the present invention, FIG. 8 is a waveform diagram showing a reproduction waveform of an adjustment pattern, and FIG. 9 is a flowchart showing a processing operation of the microcomputer 73.

The adjustment pattern generating circuit 717 is a circuit for generating a signal for adjusting the light beam intensity, and operates with the same reference clock (4.3218 MHz) as the EFM modulating circuit. The recording signal switching circuit 718 is a switch, and switches the EFM signal output from the EFM modulation circuit 15 and the adjustment pattern generated by the adjustment pattern generation circuit 717, and sends one of them to the pulse modulation circuit 112. The positive peak hold circuit 719 extracts only the AC component of the RF signal output from the recording / reproducing head 111 by means of C coupling or the like, holds the peak of the positive value, and outputs the absolute ground. Similarly, the negative peak hold circuit 720 holds the peak of the negative value of the AC component of the RF signal and outputs the absolute value thereof. An example of the sample and hold circuit is described, for example, in "Illustrated Compact Disc Reader", Hirataro Nakajima et al., 1982, Ohmsha, Ltd., page 45. The arithmetic circuit 721 calculates the symmetry of the waveform from the outputs of the two peak hold circuits and informs the microcomputer 73 of it. FIG. 8 is a waveform diagram showing the RF waveform corresponding to the pit position with the light intensity as a parameter. FIG. 8A shows a state in which the light beam intensity is optimum. In this case, if a signal having a fixed cycle is recorded, the length between pits becomes the same as the pit length, and the RF signal waveform when this is read becomes a waveform of duty 50. The output of the arithmetic circuit 721 at this time becomes 0,
This means that the symmetry is good. When the intensity of the light beam is insufficient, the pit becomes smaller as shown in (b),
The RF signal has a high H period. If the DC component is removed from this signal, the positive peak becomes smaller than the negative peak. On the contrary, when the light beam intensity is too strong, the pit becomes large as shown in (c), and the L period of the RF signal becomes long. When the DC component is removed from this signal, the negative peak becomes larger than the positive peak. In this way, by calculating the symmetry of the waveform and detecting which of the positive and negative peak values is larger, the intensity of the light beam can be controlled to an appropriate value.

The operation of adjusting the light beam intensity by the microcomputer 73 will be described below with reference to the drawings. FIG. 9 is a flowchart showing the operation of the microcomputer 73 when recording data while adjusting the intensity of the light beam. In the figure, step 91 is a step for performing preprocessing of recording, and performs the same operation as steps 31, 32, 33, 34 and 35 shown in the flowchart of FIG. That is, the recording / reproducing head 111 is moved to the portion where the recording start time is recorded as the position information signal while confirming the position information output from the demodulation circuit 12 after obtaining the recording start time and the end time. When the movement is completed, the recording signal switching circuit 7 is moved to step 92 so that the recording signal switching circuit 718 outputs the adjustment pattern generated by the adjustment pattern generating circuit 717.
Set 18 The adjustment pattern generation circuit 717 is an EFM.
The signal 11T is repeatedly generated. This 11T signal is the same as that input to the EFM modulator circuit 4.3.
It is generated by dividing the 218MHz clock.
It should be noted that it becomes exactly the same as the 11T signal of the EFM signal output from the FM modulation circuit 15.

When the setting of the recording signal switching circuit 718 is completed, the counter 14 is initialized in step 93. That is, the position information last fetched from the demodulation circuit 12 in step 91 is set as the initial value of the counter 14. Next, in step 94, the recording / reproducing head 111 is set to the recording mode, and in step 95, the 11T signal is recorded by waiting for 1 ms. If it has been recorded, the recording / reproducing head 111 is switched to the reproduction mode in step 96, the process moves to step 97 to kick back to the position where recording has started, and in step 98 the adjustment pattern recorded immediately before is read. The read adjustment pattern is sent to the positive peak hold circuit 719 and the negative peak hold circuit 720, and holds the positive peak and the negative peak, respectively.

The arithmetic circuit 721 calculates (difference in absolute value) + (sum of absolute values) using the positive peak and the negative peak, and outputs the result as symmetry. The smaller this value is, the better the symmetry is, and if the intensity of the light beam is appropriate, the symmetry is also better. In step 99, the calculation result of symmetry is received from the arithmetic circuit 721, and in step 910, it is determined whether the value is within the allowable range of the optical disc. This allowable range is determined by the material of the optical disc and the performance of the device.
If the symmetry exceeds the permissible range, the intensity of the light beam output from the recording / reproducing head 111 is adjusted in step 911, the process returns to step 93, the counter 14 is initialized, the adjustment pattern is recorded and read again, and the symmetry is checked. Performs the operation. By repeating this, if the symmetry falls within the allowable range, the process proceeds to step 912, the recording signal switching circuit 718 is switched to output the EFM signal output from the EFM modulation circuit 15, and the process proceeds to step 47 in FIG. Perform the process and record the EFM signal.

By adjusting the intensity of the light beam in the vicinity of the area for recording data as described above, it is possible to perform recording with a beam intensity optimized according to the radius of the optical disc. In particular, when the linear velocity changes according to the radius of the optical disc such as a CAV disc, the linear velocity becomes higher in the outer peripheral portion, so that the write laser intensity needs to be stronger in the outer peripheral portion, and the data recording position is required. It is very effective to properly correct the laser intensity according to the above.

In the present embodiment, the intensity adjustment was performed only at the start of recording, but since there is an unrecorded area of 1 frame for every 10 frames, the same processing is performed using this area to obtain a finer intensity. Adjustment is possible. This can be realized by replacing the portion (steps 412 to 415) in which the unrecorded area is provided in the flowchart shown in FIG. 4 with the portion (steps 93 to 912) for performing the intensity adjustment shown in FIG.

(Embodiment 4) An optical disk device according to a fourth embodiment of the present invention will be described below with reference to the drawings. In this embodiment, an adjustment pattern for performing waveform equalization of the reproducing system is recorded in the unrecorded area obtained by the means shown in the first embodiment. FIG. 10 is a block diagram showing the configuration of the optical disk device of the fourth embodiment of the present invention, FIG.
FIG. 12 is a flowchart showing the processing operation of the microcomputer 103, FIG. 12 is a block diagram of a principal part showing the configuration of a reproducing system for performing waveform equalization using an adjustment pattern in the optical disk device of the fourth embodiment of the present invention, FIG. 3 is a flowchart showing the operation of the microcomputer 1209 for controlling waveform equalization.

In FIG. 10, the adjustment pattern generation circuit 1
Reference numeral 017 denotes 4.3218 generated by the clock generation circuit 11.
The clock of MHz and the frame synchronization generation signal output from the EFM modulation circuit 1 are input, 0 is output for 1/300 seconds after the frame synchronization generation signal is generated, and the next 1 /
Outputs a 3T signal for 300 seconds and then outputs the next 1/300
The EFM signal 11T is output for a second, and thereafter 0 is continuously output until the next frame synchronization generation signal is input. Since the 3T signal and the 11T signal are generated by dividing the clock of 4.3218 MHz generated by the clock generation circuit 11, the E output from the EFM modulation circuit 15 is generated.
It should be noted that it will have the same waveform as the 11T and 3T signals in the FM signal.

The operation will be described below with reference to the flow chart shown in FIG. Steps 1101-110
5 is the same as steps 31 to 35 in the flowchart of the first embodiment shown in FIG. That is, the recording start time and the end time are obtained, and the recording / reproducing head 111 is moved to the portion where the recording start time is recorded as the position information signal by using the traverse motor 19 and the rotary shaft 110. The position information output from the demodulation circuit 12 is monitored, and if the position information output from the demodulation circuit 12 matches the recording start time, the process proceeds to step 1106, and initialization is performed by setting the recording start time in the counter 14. To do. Then, in step 1107, the block structuring circuit 1
14, the operation of the CIRC adding circuit 115, the EFM modulating circuit 15, and the frequency dividing circuit 116 is started, and step 1108 is performed.
The recording / reproducing head 111 is set to the recording mode. Up to this point, the operation is the same as that of the optical disk recording apparatus of the first embodiment.

Subsequently, at step 1109, the recording signal switching circuit 618 is set to output the EFM signal of the EFM modulation circuit. As a result, E
The FM signal is recorded. In the loop of steps 1110 to 1112, position information is fetched from the demodulation circuit 12 every time the sub-code synchronization generation signal is input from the EFM modulation circuit 15, and the sub-code synchronization generation signal is waited for 10 times. If the tenth time is counted, step 1
In step 113, the recording / reproducing head 111 is set to the reproducing mode, and the step 1114 waits for 1/300 seconds. As a result, an unrecorded area is formed. Next, Step 1115
After setting the recording / playback head to the recording mode in step 11,
At 16, the output of the recording signal switching circuit 618 is switched to the adjustment pattern.

As described above, the adjustment pattern generating circuit is 4.
In synchronization with the clock of 3218 MHz, 0, 3T, and 11T are output every 1/300 second, and 0 until the next subcode synchronization generation signal is input. On the other hand, since the recording of the adjustment pattern continues until the next subcode synchronization generation signal is detected in step 1120, the pattern 0, 3T, 11T, 0 is recorded exactly once during one subcode frame. Will be (3 x 1 /
300 seconds = 1/100 seconds <1/75 seconds).

Almost at the same time when the recording of the adjustment pattern is started in step 1116, the microcomputer 103 stops the block structuring circuit 114, the CIRC adding circuit 115 and the EFM modulating circuit 15 (step 1117). Next, in step 1118, it is determined whether or not the position information fetched in step 1111 has reached the recording end time, and if it has reached step 1119.
(4), waits for the subcode synchronization generation signal to be received, and then the ending process such as setting the recording / reproducing head 111 to the reproducing mode is performed. If the recording end time has not been reached, the block structuring circuit 114, the CIRC addition circuit 115 and the EFM modulation circuit 15 are restarted in step 1121, and the process returns to step 1108 to continue recording.

Since the 3T signal and the 11T signal are recorded every 10 subcode frames by the above processing, the reproducing apparatus can use these to judge the frequency characteristic of the reproducing system and perform waveform equalization.

Now, a method of waveform equalization processing using the optical disk on which the 3T signal and the 11T signal are recorded by the above processing will be described. Here, waveform equalization is to compensate for the frequency characteristic of the circuit of the reproducing system. Generally, in an electric circuit, a higher frequency signal (for example, 3T signal) has a lower reproduction level and is more susceptible to noise.
Further, in the CAV disk, the level of the reproduced signal becomes lower toward the outer circumference, and it is effective to optimize the characteristics of the waveform equivalent circuit according to the radius. Like MCAV,
If the frequency of the reproduced signal becomes higher toward the outer circumference, this method is considered to be necessary. For waveform equalization, the signal levels when reproducing 3T and 11T signals are respectively held by using peak hold circuits, and both are compared,
This can be performed by changing the frequency characteristic of the gain of the RF amplifier circuit (built in the recording / reproducing head 111) according to the ratio.

FIG. 12 is a block diagram showing the main part of the reproducing system in the optical disk device of this embodiment, paying particular attention to waveform equalization. The optical head 1201 outputs the 3T signal and 11T signal recorded on the optical disc by the above-mentioned method,
For example, reading is performed using a photodiode or the like. The read signal (RF signal) is the current-voltage conversion circuit 12
Is converted into a voltage value by 02, and the waveform equivalent circuit 1203
And to the peak hold circuit 1210. The output of the peak hold circuit 1210 is sent to the microcomputer 1211, and the microcomputer 1211 changes the frequency characteristic of the waveform equivalent circuit 1203 based on this value. The waveform equivalent circuit 1203 is composed of a resistor 1204 and a variable capacitor 1205, and constitutes a kind of high-pass filter. The characteristic of this filter is the resistance 1204.
And 1207 and the value of the variable capacitor 1205. The signal whose high frequency range has been raised by the waveform equivalent circuit 1203 is input to the RF amplifier circuit 1206 and the resistor 1
It is amplified with an amplification factor determined by 207 and 1208 and sent to the servo circuit and the signal processing circuit. The RF signal has a very low level and is amplified to increase the noise-signal ratio.

The waveform equalization processing of the microcomputer 1211 will be described below with reference to FIG. While the optical head 1201 is reproducing the 3T signal, the hold value is received from the peak hold circuit 1210 in step 1301. This is the peak value when the 3T signal is reproduced. Next, in step 1302, the peak hold circuit 1210 is cleared once. Next, at step 11303, the peak value when the optical head 1201 is reproducing the 11T signal is fetched. After obtaining the two peak values,
In step 1304, this value is substituted into the calculation formula recorded in the microcomputer 1211 in advance, the value of the variable capacitor 1205 is calculated, and step 1
In step 305, the value of the variable capacitor 1205 is set to the calculated value. The formula for calculating the value of the capacitor 1205 is uniquely determined when the resistors 1204 and 1207 are determined.

As described above, the frequency characteristic of the waveform equivalent circuit 1203 is determined by using the waveform equivalent circuit 1203 whose frequency characteristic is variable and the peak hold result by using the optical disc on which the adjustment pattern for waveform equalization is recorded every 10 frames. By using an optical disk device equipped with a microcomputer 1209 for changing, waveform equalization according to radius becomes possible, and in particular, signals can be accurately read out in MCAV and MCLV system optical disks in which the frequency of the signal changes according to radius. it can.

(Fifth Embodiment) An optical disk device according to a fifth embodiment of the present invention will be described below with reference to the drawings. In the above description, it has been explained that there is no problem in reproducing even if the EFM signal is recorded immediately after the blank area in which no data is recorded. This is the main part of the present invention, that is, the first track is recorded on an optical disc having a track-modulated track and having a ratio information signal recorded by changing the cycle of the track modulation. This is for the purpose of clarifying the part in which the area and the second area are divided and these are arranged continuously, the data is recorded in the first area, and the area in which the data is not recorded is provided in the second area. It was However, when a clock such as an EFM signal is reproduced (extracted) from a reproduction signal at the time of reproduction and a signal for punching out data using this, that is, a signal for performing so-called self-clocking, is recorded, reproduction is difficult as it is. is there. This is because it takes a certain amount of time to extract the clock, and the EFM signal read from the optical disk before the clock can be extracted cannot be reproduced. It should be added that this situation is a problem when recording a signal to be performed with self-clocking, but is not a problem with other signals. For example, when a track modulated track is engraved on a CAV optical disk and data is recorded on the track, the optical disk is rotated at a fixed number of revolutions, and the data is punched out with a clock having a constant frequency to obtain the data. Since it can be played back, it does not matter.

FIG. 14 is a block diagram showing the configuration of an optical disk recording apparatus which is devised to solve the above problems. In FIG. 14, a frequency divider 1401 and a switch circuit 1402 are added to the optical disk shown in the first embodiment, and the processing operation performed by the microcomputer 1413 is changed. FIG. 15 is a flowchart showing the processing operation of the microcomputer 1413, and FIG. 16 is a schematic diagram showing the structure of the data recorded on the track 1803 shown in FIG. The frequency divider 1401 inputs the signal of 4.3218 MHz which is the reference clock of the EFM modulation circuit 15, and outputs 1 /
By dividing the frequency by 3, a 3T signal is generated and output. Here, it should be noted that the 3T signal output from the frequency divider 1401 is the same as the reference clock used by the EFM modulation circuit 15. As a result, the frequency dividing circuit 14
The reproduction clock obtained by reproducing the 3T signal output by 01 becomes the same as the reproduction clock obtained by the EFM signal. The switch circuit 1402 is the EFM modulation circuit 1
5 output by EFM signal and 3 output by frequency divider 1401
The T signal is input and either one of them is output according to an instruction from the microcomputer 1413.

The operation of the optical disk device of the fifth embodiment will be described below with reference to the flowchart shown in FIG. In steps 1501 to 1506, the same operations as 41 to 46 in FIG. 1 are performed. That is, it indicates from which part of the optical disc 1801 to which part to be recorded. After obtaining the recording start time and the end time, the recording / reproducing head is moved to the recording start position, and the position information signal 1601 output from the demodulation circuit 12 is monitored to see if the recording / reproducing head 111 has reached the recording start position. to decide. This corresponds to time point 1602 in FIG. Next, step 150
In step 7, the unrecorded area is generated by waiting for 1/150 second, and the process proceeds to step 1508. Step 1508
Then, switch circuit 1402 from frequency divider 1401 to 3T
The recording / reproducing head 111 is set to the recording mode in step 1509. This corresponds to time point 1603 in FIG. When the recording of the 3T signal is started, the microcomputer 1413 proceeds to step 1
The process moves to 510 and waits for the input of the next subcode synchronization generation signal. The time when the next subcode synchronization generation signal is input is 1604.

When the subcode synchronization generation signal is input, the process proceeds to step 1511 and the block structuring circuit 114,
The operations of the CIRC adding circuit 115, the EFM modulating circuit 15, and the frequency dividing circuit 116 are started, and in step 1512, the switch circuit 1402 is set to output the EFM signal. As a result, recording of the EFM signal is started. Next, in steps 1513 and 1514, the process waits until the subcode synchronization generation signal is counted 10 times, and when the recording of the EFM signal for 10 frames is completed, the process proceeds to step 1515 to set the recording / reproducing head 111 to the reproducing mode, and At 1516, the block structuring circuit 114, the CIRC adding circuit 115, and the EFM modulation circuit 15 are stopped to stop the recording of the EFM signal. Next step 1
At step 517, position information is obtained from the demodulation circuit 12, and step 1
At 518, it is determined whether the recording position has reached the recording end time. If the end time has been reached, step 1519
Move to and finish recording, and if not, step 1
The process proceeds to 520 and waits for the next subcode synchronization generation signal to be input. If the subcode synchronization generation signal is input, the process returns to step 1507, and thereafter, the same processing is repeated until the end time.

The recording state by the above processing is shown in FIG. A period 1605 in which data is not recorded for 1/150 seconds from the recording start point, a period 1606 in which a 3T signal is recorded, and a period 1607 in which an EFM signal 1607 is recorded are recorded so as to be continuous. further,
The period 1605 in which no data is recorded and the period 1605 in which only 3T is recorded are provided in one frame.
When 10 frames of M signal are recorded, a frame (consisting of 1605 and 1606) including an unrecorded portion of 1 frame is recorded. At the time of reproduction, the 3T signal recorded before the EFM signal is used to extract the clock, and the reproduction of the EFM signal can be started with the PLL for clock extraction locked. A signal provided in advance for extracting a clock signal such as the 3T signal described here is called a preampule, and the frequency divider 1401 can be regarded as a preampule generating circuit.

As described above, in the optical disk device according to the fifth embodiment of the present invention, the preamplifier generating circuit is provided, and the microcomputer 1413 places the frame consisting of the unrecorded area and the preamplifier before the frame group for recording the EFM signal. The following effects can be obtained by including the microcomputer 1413 which is arranged and the preamplifier is arranged in contact with the EFM signal.

A track modulated track is provided,
Moreover, when recording is performed on the optical disc on which the position information is recorded by changing the track modulation period,
The track is divided into a first area and a second area, and an unrecorded area is provided in the second area to ensure ease of recording and reproduction, and self-clocking of an EFM signal or the like is performed in the first area. Even if the signal is recorded, it can be reproduced without any problem. In particular, in the world of digital audio using an optical disc, the EFM signal has become a de facto standard signal, and the practical merit of making it recordable is great.

Position information (so-called address) for identifying the first area can be recorded in the second area. In the first embodiment, the data is recorded in 10 frames and the unrecorded area of 1 frame is provided. However, assuming that 11 frames are always recorded as one unit by the same method, the address is set for each 11 frames. Access is facilitated by providing (the access is performed by detecting the address of the frame group after searching the unrecorded area, the address detection only needs to be performed once in 10 subframes). Also, the management of addresses becomes simpler (because the number of addresses is smaller than the case where addresses are provided for each frame).

FIG. 17 is a timing chart showing the recording state of tracks when addresses are recorded. In the figure, 1606 and 1607 are the preamplifier and the EFM signal described in the fifth embodiment, respectively. 1701 is position information recorded on the track, 1702 is an unrecorded area for preventing recording marks of the EFM signal from overlapping, 1
703 is address information that is added once every 11 frames. The address information is a copy of the position information indicated by the position information 1701 recorded on the track ((n
+ M) frame units) or the same position information that has been subjected to an arithmetic operation (for example, m / (n + m) times,
Display in real time, or multiply by 1 / (n + m) to get 1
1 frame = 1, etc.) and the like.

When data is handled in units of a pair of continuous first area and second area, data corresponding to the attribute of the data recorded in the first area should be recorded in the second area. Is also possible. For example, a flag indicating the type of recorded data (for example, voice, image, computer data, etc.), parameters necessary for signal processing (for example, quantization bit number of digital voice data, sampling frequency, etc.), etc. .. The second area is 1
Since there is a size for the frame, this information is sent to the EFM.
When recorded as permeation user data, 1000-2
Since there is a data amount of 000 bytes, a large amount of data can be recorded.

Further, in the above description, the size m of the first area and the size n of the second area may be changed. For example, it is effective to change the size m of the first area according to the type of data to be recorded. If a smaller unit for editing, such as digital audio data, is desired to be recorded better, m may be set smaller, and in the case of a moving image composed of a plurality of still image data, the unit of access may be one. Since it is easier to handle a still image, the number of frames that can accommodate the still image may be set as the size m of the first area. 384 × 240 pixels,
When the still image data of 1 byte for each pixel is used as a unit, the data amount of one sheet is 92160 bytes.

When this is recorded in the form of CD-ROM,
As shown in FIG. 2, the amount of data that can be recorded in one frame is 2
It is 324 bytes, and one still image can be recorded in 40 frames. (92160 ÷ 2324 <99.
7). Therefore, by setting m to 40 and recording one still image in 40 frames, it becomes easy to access the image data. Further, it is effective to change the size n of the second area according to the positioning accuracy of the optical disk recording device.
By making the second area wide, it is possible to increase the size of the unrecorded area provided therein, and it is possible to prevent the recording marks from overlapping even in an optical disk recording apparatus in which the positioning accuracy cannot be increased. Further, although the description so far has been made using the optical disc having the spiral track, the tracks may be concentric.

[0074]

As is apparent from the above embodiments, the present invention has a spiral or concentric circular track in which frames composed of data strings are arranged and recorded, and the arrangement position of the frames is designated. In an optical disk device capable of recording data in the frame by using an optical disk in which position information to be recorded is previously recorded on the track by track modulation, a first area composed of m consecutive frames (m: integer of 1 or more) And a second frame consisting of n consecutive frames (n: an integer of 1 or more) following the first region.
(M + n) frames, each of which is paired with the area, are recorded as a unit, data is recorded in the frame of the first area, and the data is recorded in the second area, which is a portion following the first area. Even if recording is performed a plurality of times by using an optical disk device equipped with recording management means for controlling recording so as to provide a blank area in which nothing is recorded, a recorded portion is generated due to the positional deviation between the position information signal and the data to be recorded. Record is never lost.

Further, by providing a rotation speed conversion means for multiplying the rotation angular velocity or linear velocity of the optical disk by (m + n) / m times, it is possible to record data requiring real-time property while making the most of the above characteristics. By providing a means for adjusting the light beam using the second area, it is possible to perform fine adjustment of the light beam intensity according to the radius, and to reproduce in the second area. By providing the means for recording the adjustment pattern for performing the circuit waveform equalization processing, it is possible to provide an optical disk recording apparatus capable of performing the waveform equalization according to the radius, and also in the first area. By providing recording management means for recording data and recording a preamplifier in a portion in contact with the first area of the second area preceding the area, the first area is provided. Even when a signal such as an FM signal for performing self-clocking is recorded, the data can be reproduced accurately, and an address is assigned to the pair of the first area and the second area, By recording this address in the second area, it is possible to easily manage the data in units of the pair of the first area and the second area, and the practical effect is great. Especially, it is indispensable when an optical disc in which position information is recorded by changing the period by periodically modulating the servo track is used for the purpose of frequent recording and erasing such as editing. Is.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disc device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a subcode frame used in the optical disc device according to the first embodiment of the present invention.

FIG. 3 is a timing chart showing a data recording state in the optical disc device according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the optical disc device according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an optical disc device according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the optical disk device of the second embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an optical disc device according to a third embodiment of the present invention.

FIG. 8 is a waveform diagram showing the relationship between the reproduction waveform of the adjustment pattern and the pits of the light beam in the optical disk device of the third embodiment of the present invention, using the light beam intensity as a parameter.

FIG. 9 is a flowchart showing the operation of the optical disk device of the third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of an optical disc device according to a fourth embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the optical disk device of the fourth embodiment of the present invention.

FIG. 12 is a principal block diagram showing a configuration of a reproduction system of an optical disc device according to a fourth embodiment of the present invention.

FIG. 13 is a flowchart showing an equivalent adjustment operation of the optical disc device according to the fourth embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of an optical disc device according to a fifth embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the optical disk device of the fifth embodiment of the present invention.

FIG. 16 is a timing chart showing a state of data recorded on a servo track in the optical disc device according to the fifth embodiment of the present invention.

FIG. 17 is a timing chart showing an address recording state.

FIG. 18 is a plan view showing the structure of an optical disc.

19 is a partial cross-sectional view showing a part of the cross section taken along the line ab in FIG.

FIG. 20 is an enlarged plan view of a main portion of a portion 1802 of FIG.

FIG. 21 is a waveform diagram showing the configuration of a position information signal in the optical disc device.

22 is a schematic diagram showing the configuration of the position information signal shown in FIG.

FIG. 23 is a block diagram showing a configuration of a conventional optical disc device.

[Explanation of symbols]

13 Microcomputer (Recording Management Means) 24 User Data (Recorded Data in Frame Composed of Data Sequences 21 to 25) 31 Position Information Signal 35 First Area (m = 10) 36 Second Area (n = 1) 1801 optical disc 1803 track

Claims (11)

[Claims] 1. A spiral or concentric track in which frames composed of data strings are arranged and recorded,
In an optical disk device capable of recording data in the frame using an optical disk in which position information designating the array position of the frame is recorded in the track by track modulation in advance, m consecutive frames (m: integer of 1 or more) ) And a second region consisting of n consecutive frames (n: an integer greater than or equal to 1) following the first region in units of (m + n) frames. Recording management means for performing array recording, recording data in a frame of the first area, and performing recording control so as to provide a blank area in which nothing is recorded in a portion of the second area following the first area. Optical disk device equipped with. 2. A demodulating means for demodulating a pre-recorded track modulation signal to output position information, and a position information generating means for generating position information to be recorded in a frame, wherein the recording management means is of the demodulating means. The position information of the frame where the data recording is started is obtained from the position information, and the position information generating means sequentially generates the position information continuous to the recording start position, and the position information includes all of the first area and the second area. 2. The optical disk device according to claim 1, wherein the control is performed so as to successively correspond to the frames of 1. and to record in the frames together with the data in the first area. 3. A buffer means for temporarily storing data from the outside, and a rotation angular velocity number or linear velocity of the optical disk
3. The optical disk device according to claim 1, further comprising a rotation speed converting means for multiplying (n + m) / m times in the case of not providing the area of (3), and recording the external data at a speed of the (m + n) / m times. .. 4. The rotation speed conversion means sets the frequency of a reference clock for controlling each rotation speed or linear speed to (n + m) / m.
4. The optical disk device according to claim 3, wherein the rotation speed is changed by doubling. 5. Demodulation means for demodulating a track modulation signal recorded on a track to output position information, and position information generation means for generating position information to be recorded in a frame,
Either the position information obtained by the demodulating means or the position information generated by the position information generating means is m / (m +
n) a position information conversion means for multiplying, and a display means for displaying the m / (m + n) times the position information output by the position information conversion means, wherein the display means records the position information of the optical disc at a normal speed. The optical disk device according to claim 3 or 4, wherein the optical disk device is converted into position information for display and displayed. 6. An adjustment pattern generating means for generating a predetermined adjustment pattern composed of a bit string and a light beam intensity adjusting means are provided, and the recording management means records the adjustment pattern in the second area before recording data. Read out later,
6. The optical disk device according to claim 1, wherein the light beam intensity adjusting means controls the waveform of the read adjustment pattern so as to adjust the light beam intensity to a proper intensity. 7. The optical disk device according to claim 6, wherein the light beam intensity adjusting means adjusts the intensity of the light beam so that the waveform of the read adjustment pattern is kept symmetrical. 8. An adjustment pattern generating means for generating an adjustment pattern having two or more kinds of frequency components is provided, and the recording management means controls to record the adjustment pattern in the second area. The optical disk device according to any one of the above. 9. An optical disc in which a waveform equalizing means for inputting an RF signal obtained by reproducing the optical disc to change frequency characteristics and an adjustment pattern having two or more kinds of frequency components are recorded in a second area. An optical disk apparatus including a waveform equivalence adjusting unit that changes the frequency characteristic of the waveform equalizing unit based on the peak value of the RF signal obtained. 10. A pre-ampoule generating means for generating a pre-ampoule signal is provided, and the recording management means records the pre-ampoule signal in a portion in contact with the first area in the second area preceding the first area. Claim 1 which controls so that
10. The optical disk device according to any one of 1 to 9. 11. An address information generating means for generating one address information corresponding to one of the first area and the second area is provided, and the recording management means has the address information in the second area. 11. The optical disc device according to claim 1, wherein the optical disc device is controlled to record.