JPH087534A - Optical disk recording device - Google Patents

Abstract

PURPOSE:To prepare the contents information which allots the constitution of recordable area and to record the information on the contents area of a specified optical disk during a recording period. CONSTITUTION:In the reproducing mode, information of MD 1 is given to an address decoder 6 and an EFM/CIRC modulation/demodulation circuit 7 through an optical pickup PU4 and a head amplifier 5. The decoder 6 detects and decodes the address information superimposed on CLV controlling sine wave signals which slightly meanders in the guide grooves of the MD 1. Its output is inputted into the circuit 7 to demodulate EFM and CIRC and further inputted into a vibration-proof memory controller MC 8. The MC 8 stores the data from the circuit 7 into a recording circuit 9 and reads this compressed data to send it to an ATRAC modulation/demodulation circuit 10. The circuit 10 demodulates the compressed data and sends it to a digital/analog converter(DAC) 12 to output the sound output through a terminal 13 for reproduction. Thus, restoration and reproduction of data during recording are possible even when power is interrupted.

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 device for recording data such as audio signals.

[0002]

2. Description of the Related Art Conventionally, a device capable of recording data such as a voice signal on a recording medium and reproducing the recording medium later, that is, an audio recorder is a compact type. There were cassette tape recorders and open reel tape recorders. In recent years, recorders such as digital audio tape recorders (DAT) and compact disc (CD) recorders have been developed that convert an audio signal to be recorded from analog to digital and record it digitally on a recording medium.
Recently, development of a recording film of an optical disc medium has progressed, and a system and medium capable of overwriting the already recorded portion have been developed. There is a magneto-optical modulation recording system as one of the overwrite systems, and optical disc media and devices adapted to the system are beginning to be put into practical use. As a typical example of such a medium, a magneto-optical disk having a sampling frequency of 44.1 kHz and a 16-bit resolution in two channels at the reproduction level has been proposed, utilizing a sound compression / expansion technology, as in a conventional CD. ing. A recording / reproducing system using a magneto-optical disc includes a mini disc (MD, hereinafter referred to as MD
There is something called a system. In this system, the amount of information to be recorded / reproduced is compressed to 1/5 to record a signal on an optical disc or an optical disc medium such as a magneto-optical disc, and the information read at the time of reproduction is expanded to have an audio performance similar to that of a CD. I have to.

The main specifications of this system are that the disc diameter is 64 mm, the track pitch is 1.6 μm, and audio data can be recorded and reproduced for a maximum of 74 minutes. The linear velocity of the disc is 1.2 to 1.4 m / sec. Is. In addition, the performance of audio signals is that the number of channels is 2 stereo channels, frequency band is 5 to 20 kHz, and dynamic range is 1.
The recording method is a magnetic field modulation recording method at 05 dB. Further, the signal format is a sampling frequency of 44.1 kHz, and the modulation method is EFM (Eight to Four) like CD.
EE Modulation) and the error correction method is CIRC (Cross Interleave Ree).
d-Solmon Code).

A high performance coding method is ATRAC.
(Adaptive Transform Accouse
This is called tic coding). This system divides analog-to-digital converted audio data into time frames of up to 11.6 milliseconds, and MDCT (M
optimized Discrete Cosin Tr
transform: modified discrete cosine transform) operation to separate into a plurality of frequency bands, and MDCT to convert to a frequency axis, and then perform data thinning using human auditory characteristics,
Compress to about one fifth of the amount of data. Therefore, although the recording density on the magneto-optical disk is similar to that of the CD, the area of the optical disk required for recording and reproducing for the same time is 1/5.
The diameter is 64 mm, which is much smaller than the CD.
Can be

Consider the major features of such a magneto-optical recording device. When playing a CD, this CD is 1.4M
The bit / sec signal must be fed into a digital-to-analog converter (ADC) without interruption. Therefore C
The reproduced signal from D must be read in real time. On the other hand, in the case of the optical disc recording apparatus using the technique of compressing and expanding digital data, the amount of information to be recorded is compressed to about 1/5. Since the signal read out at 1.4 Mbit / sec is a compressed signal, if the data compressed at 0.3 Mbit / sec is reproduced, the decompressed data will be read out at 1.5 Mbit / sec. Becomes Therefore, continuous data can be obtained even if the signal of the optical disk is intermittently read.

Therefore, if the signals read from the magneto-optical disk are stored in a storage circuit such as a buffer memory, the audio signals stored in the buffer memory can be continuously reproduced. Therefore, if vibration is applied to the device and the focus servo or tracking servo of the optical pickup is released, until the servos operate again, a CD will cause skips, but data compression / expansion technology is used. In the recording / reproducing apparatus described above, since data is stored in the buffer memory, sound interruption does not occur. While the data stored in the buffer memory is read and the audio signal is continuously reproduced, the reproduced light beam spot returns to its original position on the magneto-optical disk, and if the signal reading is continued, the sound skips. Will not occur.

The use of the above-mentioned buffer memory and compression / decompression technique brings about another major feature. In a CD, one piece of music, that is, a track, is always formed in a continuous area on the optical disc in a lump. However, in the case of the above-mentioned apparatus, even if divided recording is performed as a plurality of block recording data in a random area on the magneto-optical disk, it can be formed as one song (track). This is because the signal is read from the magneto-optical disk at a transfer rate of 1.4 Mbit / sec, but the transfer rate required to decode the compressed signal is 0.3 Mbit / sec. There is a vacant time to read out. Utilizing this time, the data read from the magneto-optical disk is temporarily stored in the buffer memory, and then the separated areas (one track is recorded in a plurality of separated areas on the magneto-optical disk). Before the buffer memory is emptied, the optical pickup is moved from one block recording data to the next block recording data) to read the signal from the magneto-optical disk. Then, if you store it in the buffer memory,
The audio signal can be output without interruption.

Similarly, even if the same song (track) is recorded with a continuous audio signal in a distant area on the magneto-optical disk, it can be reproduced without interruption. A state indicating that one track is composed of a plurality of small block recording data (a plurality of recording block recording data consisting of continuous areas on the magneto-optical disk are dispersed on the magneto-optical disk) (Structure information of) is registered at a predetermined position of the magneto-optical disk as table-of-contents information. Therefore, for example, when changing the song number or when editing one song into two, there is a waiting time during the actual elapsed time of the part to be changed. However, in this magneto-optical disk recording apparatus, it can be easily changed by rewriting the composition information (connection information) of the music in the area, which is the above-mentioned table of contents information. Even in editing, the compression / decompression technology brings great advantages.

[0009]

As described above, in the case of a magneto-optical disk recording apparatus called a mini disk system (hereinafter, a mini disk is referred to as MD), one track has a plurality of small block recording data (magneto-optical). A plurality of small block recording data consisting of continuous areas on the disc are present on the magneto-optical disc in a dispersed manner), but the composition information of these songs exists for each track, Is UTOC (Use
Recording and registration is performed in a predetermined area of the MD called an r Table of Contents area.

In this UTOC area, in addition to the configuration information of each track, the year and date information recorded on each track,
Additional information such as the name of the magneto-optical disk and the name of the track can be recorded and registered. However, the timing of recording the table-of-contents information (configuration information) of the track to be recorded in the UTOC area cannot be determined until the recording of the track being recorded is completed. Because it is unclear how long the recording track will record,
This is because the end position of the track cannot be determined.

Therefore, conventionally, a magneto-optical disk recording device such as an MD is provided with a recording stop command button, and when the button is pressed, the table of contents information of the recorded track is recorded in the UTOC area. . However, when the power supply of the magneto-optical disk recording device stops the power supply due to a power failure or the like during recording on the track (hereinafter referred to as power-down), the table of contents information of the recorded track is M.
Since it has not been recorded in the UTOC area of D, it becomes impossible to reproduce the recorded information of this track later.

The reason is that the data such as the voice for the track is recorded in the user recording area, but the configuration information for managing it is in the UTOC area. The recorded areas are completely separated from the data such as voice and the table of contents information which is the management information. Therefore, reproduction cannot be performed because there is no way to know the table of contents information immediately before the power-down, that is, the area in the user recording area where the block recording data recorded in this track exists. It will be. Therefore, not only the time required to record the block recording data on the track is wasted, but also the device becomes inconvenient to use.

The present invention has been made to solve the above problems, and an object thereof is to turn off the power supply while recording block recording data in a user recording area of a magneto-optical disk. SUMMARY OF THE INVENTION It is an object of the present invention to provide a magneto-optical disk device capable of reproducing the block-recorded data recorded so far for the magneto-optical disk for which the table-of-contents information of the block-recorded data recorded so far cannot be recorded.

Furthermore, if the power is turned off during recording, and if there is still a recordable area in the recording on the magneto-optical disk, if the power is turned on again, recording is performed. An object of the present invention is to provide a device capable of performing normal recording as in the case where the power down does not occur.

[0015]

According to the present invention, in an optical disk recording apparatus having a system control means for recording data such as audio signals, a recording signal to be recorded on an optical disk, that is, a previously input audio signal or an input audio signal. Means for storing the data of the modulated signal obtained by modulating the signal in the memory circuit of the buffer memory, means for reading the signal from the memory circuit and recording it on the optical disk when the amount of data stored in the memory circuit reaches a predetermined amount, and the memory circuit Means for recording the table-of-contents information of a plurality of block recording data in which the signal read from the optical disk is recorded on the optical disk,
Recording is started on the optical disc in response to a recording start instruction from the operation unit, and the index information allocated from the recording area of the optical disc is recorded as the index information of the block recording data that is read from the storage circuit of the buffer memory and recorded intermittently. When the power down is detected by the power down monitoring detection means for monitoring the power down of the system control means for controlling the means for recording in the table of contents area and the means for reading the table of contents information, The optical disk recording device is configured to store a time elapsed from the start of recording instructed by the operation unit and a flag indicating that the power supply is down in a nonvolatile memory circuit.

According to the present invention, when the power of the optical disk recording apparatus is turned on, a flag indicating that the power is down and a recording elapsed time are read from the nonvolatile memory circuit provided in the system control means, and the inserted optical disk is the same as before. During the recording operation, when the reading means detects the flag indicating that the power supply is down, the last block record data among the block record data registered in the table of contents information read from the optical disc is set to the non-volatile state. Means for dividing into two block recording data at a time position obtained by subtracting a predetermined time from the recording elapsed time read from the characteristic storage circuit,
Means for deleting the block recording data that does not include the elapsed time read from the non-volatile memory circuit, and registering the deleted area in the table of contents information as a later recordable area,
The optical disk recording device is configured to reset a flag indicating that the power is down and to store the flag in a nonvolatile memory circuit.

[0017]

According to the present invention, the optical disk recording apparatus creates the index information to which the structure of the recordable area of the optical disk is assigned as the index information of the block recording data to be recorded after receiving the recording start instruction. Therefore, the created index information can be recorded in the index area of a predetermined optical disk during the recording operation. Further, during the recording operation, the power-down monitoring detection means of the apparatus writes the elapsed time from the start of recording and a flag indicating that the power is down in the nonvolatile memory circuit after detecting the power-down and before turning off the power. Since the processing is prioritized, it is possible to recognize the power-down state inside the device.

According to the present invention, when the power of the optical disk recording apparatus is turned on, the flag indicating that the power is down and the recording elapsed time are read from the non-volatile memory circuit, and the inserted optical disk has previously been in the recording operation. It is possible to detect a flag indicating that the power supply is down. If this flag is detected, the last block record data of the block record data registered in the table of contents information read from the optical disk is recorded in the nonvolatile recording circuit. The block recording data divided from the block recording data into two block recording data at the recording elapsed time read from or the time position obtained by subtracting a predetermined time from the recording elapsed time, and the block recording not including the elapsed time read from the nonvolatile memory circuit is performed. Distinguish the data,
It is possible to register the distinguished area as a later recordable area in the table of contents information and continuously record additional data. This distinguished area can also be deleted. Further, after the editing work, the flag indicating that the power supply is down stored in the nonvolatile memory circuit is set to the initial state (not the power supply down), and the trouble of the power supply down occurring during the recording operation can be recovered.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mini disk system will be described below as an embodiment of the present invention. First, as the optical disk recording apparatus of the present invention, the previously described MD (mini disk) is used.
Of a magneto-optical disk recording device in which the MD is rotatably disposed in a cartridge of 64 mm × 72 mm × 5 mm size and the MD in the cartridge can be recorded or reproduced (in the present invention, a magneto-optical disk reproducing / recording device and a magneto-optical disk). The configuration including a reproducing device will be referred to as a magneto-optical disk recording device).

FIG. 1 is a system diagram showing an embodiment of a magneto-optical disk recording apparatus of the present invention. Reference numeral 1 denotes an MD as a magneto-optical disk, and MD1 is rotatable in a cartridge 1A. Is loaded onto the turntable 2B of the player 2 by loading it into the magneto-optical disk recording device, and the MD1 is loaded into the cartridge 1A.
The center portion is fixed on the turntable 2B and is rotatable by the spindle motor 2A. By opening the shutter provided on the lower side of the cartridge 1A, the laser light from the optical pickup 4 is irradiated on the MD1, and the optical pickup 4 is slidable by the slide motor 18 in the radial direction of the MD1. As will be described later, the magnetic head 16 is a magnetic field generation unit for giving a magnetic pole of NS pole corresponding to a recording signal in a direction perpendicular to the board surface of MD1.

The servo control circuit 3 is a spindle motor 2A.
Spindle motor rotation control, slide motor 18 slide control, optical pickup 4 focus control and tracking control, semiconductor laser laser control in the optical pickup 4, and the like. The spindle motor 2A is a spindle in the servo control circuit. CLV by control circuit
(Constant Linear Velocity
The rotation is controlled in y).

The slide motor 18 controls the slide motor control circuit in the servo control circuit 3 to slide the optical pickup 4 in the radial direction of the MD 1, and the optical pickup 4 also performs focus control in the servo control circuit 3. The circuit, the tracking control circuit, and the laser control circuit control focusing, tracking, and on / off of the semiconductor laser.

First, the reproduction route will be described. The record information of the MD 1 is read by the optical pickup 4, passes through the head amplifier 5, and is passed to the address decoder 6 and the EFM / CI.
It is added to the RC modulation / demodulation circuit 7. Address decoder 6
Then, the address information superimposed on the CLV control sine wave signal that causes the guide groove preformed in MD1 to meander by a slight amount is detected and decoded. This output is EF
It is added to the M / CIRC modulation / demodulation circuit 7. EFM / CIR
The C modulation / demodulation circuit 7 demodulates the EFM and CIRC, and the output thereof is input to the anti-vibration memory controller 8.

The vibration-proof memory controller 8 is an EFM /
It has a function of storing the data from the CIRC modulation / demodulation circuit 7 in the storage circuit 9 such as a buffer memory, and a function of reading the compressed data stored in the storage circuit 9 for sending it to the modulation / demodulation circuit 10 of the ATRAC. The ATRAC modulation / demodulation circuit 10 demodulates the compressed data and outputs the demodulated data to a DAC (digital-analog converter) 1
2 and outputs the voice output to the voice output terminal 13.

Next, the recording signal path will be described. A recording input signal such as voice is input from the input terminal 14 and the ADC
(Analog-digital converter) 11 converts into digital data. The ATRAC modulation / demodulation circuit 10 converts the digital data into compressed data, and the recorded compressed data is stored in the storage circuit 9 via the vibration-proof memory controller 8. When the amount of data stored in the storage circuit 9 reaches a predetermined amount, recording of data in MD1 is started. The vibration-proof memory controller 8 reads the stored data from the storage circuit 9 and outputs it to the EFM / CIRC modulation / demodulation circuit 7.

In the EFM / CIRC modulation / demodulation circuit 7, E
FM and CIRC are modulated, and the output is output to the magnetic head drive circuit 17, and the magnetic head drive circuit 17 generates a magnetic field in the vertical direction on the board surface of MD1 corresponding to the recording EFM signal, and passes through the magnetic head 16. Apply a magnetic field to MD1. On the other hand, from the optical pickup 4 arranged on the side opposite to the magnetic head with respect to the MD 1, a recording high power laser output via the servo control circuit 3 in response to a command from a system controller 15 including a computer as a system control means. , MD1 is irradiated. The magnetic field generated by the magnetic head 16 sandwiching the MD1 and the optical pickup 4
A recording input signal is recorded in MD1 by the two interactions of the heat of the light beam from.

On the other hand, a slide control signal from the system controller 15 is applied to the slide motor 18 via the servo control circuit 3 to move the optical pickup 4.
The system controller 15 sends command signals for all controls such as recording, reproduction, and search operation of the optical pickup to each unit, detects signals such as MD1 address information, and outputs the servo control circuit 3 and EFM / CIRC modulation. The demodulation circuit 7 and each unit of the vibration-proof memory controller 8 are connected via a bus to receive and transmit control data. Also 28
Is an operation unit having a ten-key pad or the like for outputting various command signals at the input device unit of the system controller 15, and 19 is a display device such as a liquid crystal for displaying various data from the system controller 15.

Further, the system controller 15 is configured to receive the output from the power-down detection circuit 25 of the apparatus and monitor the power-down during the recording operation. The power down detection circuit 25 monitors a threshold level of a pulse signal that guarantees stable operation of the ICs forming the system controller 15.
Will stop operating below a predetermined threshold level.
This value varies depending on the type of IC, but normally, in an IC having a detection signal level of 4.2V for detecting power-down, the operation becomes unstable when it becomes approximately 3.9V or less.
By monitoring this value, it is determined whether or not the power supply is down. As important as the power down detection circuit 25, even if the power of the device is down, the non-volatile memory circuit 24 that holds the write contents is connected to the system controller 15 so as to carry out the present invention once. I am configuring.

Further, in this embodiment, a CD player 21 or a digital audio tape recorder (DAT) 20 is connected to another input terminal provided in parallel with the input terminal 14, and a digital audio interface 22 is connected as shown by a broken line. ATRAC modulation circuit 10 and DAT 20 or CD
Connected between the output interfaces of the player 21. A level detection circuit 23 is interposed between the input terminal 14 and the ADC 11.

The operation of the magneto-optical disk recording device having the above-mentioned structure will be described. The signal format recorded on the track of the recording surface of MD1 used in this embodiment is shown in FIG. That is, the lead-in (pre-pit portion) 1D, the UTOC area 1E, the user recording area 1F for recording sound and the like and the lead-out 1H are formed from the innermost circumference 1B of the MD to the outermost circumference 1C of the MD1. In the user recording area 1F, for example, addresses A to L for each of music numbers 1 to 6 as shown in the contents of the UTOC in the figure are provided, and in the UTOC area 1E, tracks (music pieces) recorded in the user recording area 1F. The table of contents information, which is the address of

FIG. 3 shows the third part of the user recording area 1F of MD1.
FIG. 3 is a diagram showing a data arrangement of a disc on which data such as audio is recorded up to tracks (tune numbers 1 to 3). In the case of MD1, since one track is composed of a plurality of small block recording data, such a state (music composition information) is recorded and registered in the UTOC area 1E as index information. Here, A, B, C, D, E, F, ... Shown in FIG.
., K indicates the start position address or end position address of each small block recording data.

FIG. 4 is a table showing the table of contents information of each track (song) read from the UTOC area 1E in the recording state of the block recording data shown in FIG. In FIGS. 3 and 4, the track 1 is a small block which starts at the start position address A and ends at the end position address B, and a small block which starts at the start address E and ends at the end address F. It is composed of recording data B3. Therefore, the reproduction order of the track 1 is such that the small block recording data B1 is first and the small block recording data B3 is next.
become. Track 1 ends with the small block recording data B3. Therefore, the track 1 is composed of two small block recording data.

Track 2 is a small block recording data B2 which starts at the start position address C and ends at the end address D.
It is formed of one of. Needless to say, the reproduction order of the track 2 is only the small block recording data B2. Similarly, the track 3 is formed by one of the small block recording data B5 which starts at the start position address I and ends at the end address J. Similarly to the track 2, the track 3 ends with the reproduction with only one small block recording data B5. The connection information of each track is the connection information 31 to 3
It becomes 3.

Further, the UTOC area 1E shown in FIG.
Information has an empty block 34 of FIG. 4, and this empty block 34 starts at a start address G as shown in FIG.
It is registered as an empty block B4 that does not belong to any track that ends at the end address H. The empty block 34 is used later when recording another track (song). Therefore, in this embodiment, the small block B4 is the empty block 34. Further, in the information of the UTOC area 1E, the address P of the outer periphery 1C of MD1 is more than the address K of FIG.
Up to the above, since all are unrecorded, like the empty block 34, it is registered as information to be used at the time of recording a subsequent track (song). The start address 35 of the unrecorded area in FIG. 4 is from address K to address P.

The link information 31 to 33 of each track, the empty block 34, and the start address 35 of the unrecorded area described above.
Is read by the system controller 15 of FIG. 1 and is used for future track (song) recording.

Next, the case where four or more tracks are recorded in the state where up to three tracks are recorded on the MD1 will be described with reference to the flowchart of the recording operation of the present invention of FIG. 9 and the system diagram of FIG. When the system controller 15 of FIG. 1 receives a recording standby command via the operation unit 28, the UTOC1E
And the outer periphery of the unrecorded area after the start address K is recognized as a recording area after the empty block B4 shown in FIG.

After that, the system controller 15 of FIG.
Receives a recording start command from the operation unit 28 (ST1)
Perform recording start operation. Then, the recording input signal from the input terminal 14 of FIG. 1 is converted into digital data by the ADC 11, and the vibration-resistant memory controller 8 through the ATRAC modulation / demodulation circuit 10 compresses and converts the recorded digital data into the storage circuit 9. To start (ST2).

Then, the process proceeds to step ST3. Step ST3 is a feature of the present invention. As the table-of-contents information of the track where recording was started, it was created with all of the recordable area being secured, and this table-of-contents information was created.
Record in the area. The table of contents information at this time is shown in FIG.
The track 4 is composed of a small block B4 and a small block B6. The small block B6 corresponds to an unrecorded area before recording the track 4, and points from the address K to the address P from the outermost circumference. Then, the table-of-contents information when the entire area of the track 4 is recorded is created. Therefore, both the empty block 45 and the start address of the unrecorded area are none.

Next, when a predetermined amount of recording data is stored in the storage circuit 9 (ST4), the process proceeds to step ST5, and when the predetermined amount of recording data is stored in the storage circuit 9, the MD1 image is displayed for the first time. Recording is performed from the start address G of the empty block B4 shown in FIG. The flow of recording data to be recorded in the MD1 is as described above. Even while recording data as input data to the MD 1, the recording data to be input is of course stored in the storage circuit 9. As described in the prior art, the transfer rate of the ADC 11 of the input signal is 1.4 Mbit / sec, but the transfer rate of the record compressed data compressed to about 1/5 to MD1 is
Since the recording rate is 0.3 Mbit / sec, recording on MD1 is performed intermittently.

As described above, after intermittently recording on the MD1 to finish recording up to the end address H of the small block B4 which is the empty block B4 in FIG. The block recording data is an area starting from the start address K of the unrecorded area.

By the way, after starting recording on the track 4, the system controller 15 of FIG.
It also manages the elapsed time in the truck. If it is a normal operation during the recording operation, after that, in step ST6, when the system controller 15 of FIG. 1 receives a recording stop command from the operation unit 28, the table of contents information of the track 4 is determined (end address). At the same time, all the recording data which has not reached the predetermined amount but has been stored in the storage circuit 9 is recorded in MD1 (ST7), and immediately after the recording is completed, in step ST8, the tracks 1 to 4 are immediately recorded.
M of the table of contents information up to (the remaining information accumulated in the memory circuit)
The data is recorded in the UTOC area 1E (user recording area) of D1. Unlike the table-of-contents information provisionally created in step ST3, the address of the small block of track 4 is the end address created when the recording stop command is actually received.

However, from step ST4 to step S
If the power of the apparatus is turned off while the recording operation is repeated up to T6, the process does not proceed until step ST8. Therefore, the end address recorded on track 4 is
It will not be updated (recorded) in the UTOC.

In such a case, according to the present invention, the processing routine for powering down the apparatus shown in FIG. 10 is performed. In order to execute this processing routine, when the power down detection circuit 25 shown in FIG. 1 detects a power down (S1), the detection output is input to the system controller 15, and the highest priority handling is performed by an interrupt or the like. . This is because the power is not supplied to the system controller 15 itself because it is detected immediately before the power is down.

However, since the power down detection circuit 25 detects a drop in the power supply voltage and the voltage at which the ICs and the like which form the system controller 15 stop operating does not drop, it takes several hundreds of milliseconds. This processing routine is prioritized and executed within the time.
When the power-down recording operation is in progress (S2), the power-down flag is set to 0 (S3), and the recording elapsed time is set to all zero data (S4). If not, the power-down flag is set to 1 (S5), and the elapsed recording time is set in the write data (S6). Then, when any one of the processes is performed, the writing of data to the nonvolatile memory circuit is completed (S7).

The main purpose of this processing routine is to write in the nonvolatile memory circuit 24 a flag indicating that the power supply is down during the recording operation and time information indicating that the power supply is down during the recording operation. . As for the amount of data to be written, 1 bit indicating the flag and 4 bytes (32 bits) indicating the time information are sufficient. Therefore, it takes about 100 milliseconds to complete the entire process. When an electrically erasable non-volatile memory EPROM is used as an example of the non-volatile memory circuit, this object can be sufficiently achieved because the rewriting frequency can be 1 million times with a capacity of 64 bits. it can. Moreover, inexpensive parts can be used.

The processing time of the above-mentioned processing routine must be performed before the power is actually supplied to the system controller 15 and the non-volatile memory circuit 25. After the detection, the system controller 15 and the nonvolatile memory circuit 2 are actually
It is also possible to simply configure the time until the power of the two of 4 is shut down by a capacitor or the like. In any case, the recovery processing for the power down is performed by setting the time so that the above-mentioned processing is surely completed before the power is really down.

Next, the operation when the apparatus is powered on will be described with reference to the flowchart of FIG. When the device is powered on (ST11), the system controller 15 reads from the nonvolatile memory circuit 24 in step ST12. This is a feature of the present invention during the recording operation,
Before the UTOC area is updated, it is performed to identify whether the power supply of the device is down or whether the UTOC update is normally performed. In step ST13, it is checked whether the data read from the non-volatile memory circuit 24 is the written data when the power supply of the apparatus is down during the recording operation. This is simply determined by 1-bit data.

That is, when the bit is 1, it means that the power supply is down during the recording operation, and when it is 0, it means that the power supply is not down during the recording operation. Therefore, YE
If S, branch to step ST14; if NO, branch to step ST15. In the present invention, the case of YES is a particularly important flow. In step ST14, it is recognized that editing is necessary. In step ST15, the flag 0 is set so as not to be edited.

Next, the reading of MD UTOC is started.
In order to read the index information of each track (song) recorded in the UTOC area 1E shown in FIG. 2, step ST
In step 16, the optical pickup 4 is moved to the UTOC area 1E of MD1, and in step ST17, the pickup data from the optical pickup 4 is passed through the head amplifier 5 to E.
The data is stored in the storage circuit 9 from the FM / CIRC modulation circuit 7 via the anti-vibration memory controller 8. After that, the system controller 1 uses the read table of contents information of each track.
5 reads through the vibration-proof memory controller 8. Next, in step ST18, it is determined whether or not editing is necessary based on the set or cleared flag determined in step ST13. If the power supply of the apparatus is not down during the recording operation, there is no need to edit, so normally, since the flag is 0 in step ST15, this processing ends.

When the power of the apparatus is turned on while the apparatus is powered down during the recording operation, the following processing is performed. In the present invention, since MD1 is inserted or ejected by electric loading, it is impossible to eject MD1 when the power is off. Therefore, when the power is turned on, the MD1 which was in the middle of the recording operation is inserted into the apparatus as it is.

In step ST12, the data is read from the non-volatile memory circuit, and it is recognized that the power is down during the recording operation because the power down flag is "1" in the determination in ST13. Therefore, step ST18
Then, the determination is YES, and the process shifts to the step which is a feature of the present invention. In step ST19, the last track read in step ST17 is divided into tracks. As a specific example, as described above, when the power supply is turned off at the address L shown in FIG. 5 during the recording operation of the track 4, the recording elapsed time of the data read from the nonvolatile recording circuit is the address of the track 4. Since it is the elapsed time in the track up to L, it is not recorded in MD1 after this time.
However, in the UTOC table of contents information read in step ST17, the track 4 is registered in a state in which it is recorded to the end. This is because it was processed in step ST3 of FIG. Therefore, the unrecorded part of the track 4 becomes a recordable area.

For this reason, the track 4 is divided at the time position read from the nonvolatile memory circuit and divided into the track 4 and the track 5. Next, the track 5 is deleted. Deleting track 5 is replacing it with a recordable area. As a result, the table-of-contents information showing the result of the above-described track editing is as shown in FIG. 8, and the next recordable area is from the address M to the address P, and the table-of-contents information of the track 4 in the middle of the recording operation is also included. It is definitely created. What is important here is that when the end address of the small block reads UTOC in step ST17,
Although it is P which is the outermost circumference, it is up to the address L, and similarly, there is no area for recording at all, which is present as it matches the actual recording operation. is there.

Here, the dividing point of the track is set to the elapsed time read from the non-volatile memory circuit, but the dividing point may be divided by a predetermined time. This is because, in the present invention, the recording operation is performed every time a predetermined recording data is accumulated during the recording operation. Therefore, in some cases, depending on the power-down timing of the apparatus, the recording is actually performed on the MD1. Since it includes the time that is not done, it is better to exclude that time.

Next, at step ST20, the flag indicating that the power supply is down is cleared and written in the nonvolatile memory circuit, and the table of contents information of FIG. 8 is recorded in the UTOC area. FIG. 7 shows a recording state that matches the table of contents information of FIG. It can be seen that the addresses M to P are free as the next recordable area. Thus, the initialization of the inserted MD1 is completed. The track 4 can reproduce the recorded portion even though the power is turned off during the recording operation.

In the above embodiment, the MD which is a magneto-optical disk has been described as a recording medium, but a recording medium and an apparatus such as a floppy disk in which the table of contents information area and the data area are divided are also within the scope of the present invention. Of course you can enter.

[0056]

As described above, according to the present invention, even in an emergency when the power supply of the apparatus is down during the recording operation, the track recorded up to that point can be reproduced, and the unrecorded portion can be recorded. Since it is registered in the table of contents information area of the optical disc, it can be used for subsequent recording. Therefore, even if a timer or the like is connected to the optical disc recording apparatus, recording is started at the recording start time set in the timer, and power is not supplied to the optical disc recording apparatus at the timer off time, It is possible to discriminate and record in the recording state of the recorded optical disc in the same way as in the recording of.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a recording device for a magneto-optical disk of the present invention.

FIG. 2 is an MD used in the magneto-optical disk recording apparatus of the present invention.
FIG. 3 is an explanatory diagram of UTOC of FIG.

FIG. 3 is a diagram showing a data arrangement of a disc recorded up to a third track of an MD used in the present invention.

4 is a UTOC in the recording state shown in FIG.
It is a data table of the table of contents information read from the area.

FIG. 5 is a diagram showing a data arrangement of a disc in a state where data is recorded up to the middle of a fourth track in the present invention.

FIG. 6 is a diagram showing a data table of table-of-contents information to be recorded in the UTOC area at the start of recording on the fourth track.

FIG. 7 is a radial cross-sectional view of the recording state, which is the same as the UTOC data after the track is edited after the power is turned off and the power is turned on again, as viewed from the side surface of the disk.

FIG. 8 is a diagram showing a data table of table-of-contents information to be recorded in the UTOC area after the power is turned off and then the power is turned on again to edit a track.

FIG. 9 is a flowchart of a recording operation of the present invention.

FIG. 10 is a flowchart when the power of the device of the present invention is down.

FIG. 11 is a flowchart when the power of the device of the present invention is turned on.

[Explanation of reference numerals] 1 MD (magneto-optical disk) 2 player 9 storage circuit 15 system controller 20 DAT 21 CD player 22 digital audio interface (I / F)

[Procedure amendment]

[Submission date] December 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

The present invention has been made to solve the above problems, and an object of the present invention is to turn off the power supply while the block recording data is being recorded in the user recording area of the optical disk. It is an object of the present invention to provide an optical disk device capable of reproducing the block recording data recorded up to that time, for the optical disk which could not record the table-of-contents information of the block recording data recorded up to that point.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Further, if the power is turned off during recording, and if the recordable area still remains on the optical disk, but the power is turned on again, the power is turned off during recording. It is to provide a device capable of performing normal recording as in the case of not performing.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

According to the present invention, when the power of the optical disk recording apparatus is turned on, a flag indicating that the power is down and a recording elapsed time are read from a nonvolatile memory circuit provided in the system control means, and a recording operation is performed on the optical disk. Elapsed recording time when the last block recording data of the block recording data registered in the table of contents information read from the optical disk was read from the nonvolatile memory circuit when the flag indicating that the power supply was down was detected by the means for reading. Or 2 times the time elapsed by subtracting the specified time from the elapsed recording time
Means for dividing into one block recording data, means for registering the block recording data area after the elapsed time read from the non-volatile memory circuit as the recordable area in the table of contents information, and resetting the flag indicating that the power supply is down It is an optical disk recording device equipped with reset means.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0045

[Correction method] Change

[Correction content]

The main purpose of this processing routine is to write to the nonvolatile memory circuit 24 a flag indicating that the power supply is down during the recording operation and time information indicating when the power supply is down during the recording operation. Is. As for the amount of data to be written, 1 bit indicating the flag and 4 bytes (32 bits) indicating the time information are sufficient. Therefore,
It takes about 100 milliseconds to complete this process. As an example of the nonvolatile memory circuit, an electrically erasable nonvolatile memory such as an EEPROM (Electri)
cally Erasable and Read O
In the case of using nly Memory), this object can be sufficiently achieved because the capacity of 64 bits and the number of times of rewriting can be 1 million times. Moreover, inexpensive parts can be used.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

Although the division point of the track is set to the elapsed time read from the non-volatile memory circuit here, the division may be performed by subtracting a predetermined time from the elapsed time.
Normal recording is performed for each cluster, which is the minimum unit of recording, and this takes about 2 seconds. In the present invention, since the recording operation is performed every time a predetermined recording data (one cluster) is stored in the non-volatile memory circuit during the recording operation, the MD1 is actually changed depending on the power-down timing of the apparatus. Since the recorded data includes the time on the non-volatile memory circuit that is not yet recorded as the table-of-contents information, it is stored in the non-volatile memory circuit from the start of storage of one cluster to the power-down. It is still better to utilize the data that is erased without the table-of-contents information if the table-of-contents information is constructed and recorded by subtracting the data for the predetermined time from the elapsed time.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G11B 20/12 9295-5D 27/10 A 9369-5D

Claims (2)

[Claims] 1. An optical disk recording apparatus having a system control means for recording data such as an audio signal, wherein data of a recording signal to be recorded on an optical disk is a pre-input audio signal or data of a modulated signal obtained by modulating the input audio signal. Means for storing in the memory circuit of the buffer memory, means for reading a signal from the memory circuit when the amount of data stored in the memory circuit reaches a predetermined amount and recording the signal on the optical disk, and a signal read from the memory circuit. Means for recording the index information of a plurality of block recording data recorded on the optical disc in a predetermined index area of the optical disc, and recording on the optical disc by a recording start instruction from the operation unit, and reading from the storage circuit of the buffer memory. However, as the table of contents information of the block recording data to be intermittently recorded, Power down for monitoring the power down of system control means having means for creating and recording the allocated index information in the index area of the memory circuit and controlling the means for recording in the index area and the means for reading out the index information When the monitoring detection means detects that the power supply is down, the nonvolatile storage circuit stores the elapsed time from the start of recording instructed by the operation unit and a flag indicating that the power supply is down. A characteristic optical disk recording device. 2. When the power of the optical disk recording apparatus is turned on, a flag indicating that the power is down and a recording elapsed time are read from a non-volatile memory circuit provided in the system control means, and the inserted optical disk has previously recorded. inside,
When the reading means detects a flag indicating that the power is down, the last block record data of the block record data registered in the table of contents information read from the optical disc is read from the nonvolatile memory circuit. A means for dividing the block recording data into two block recording data at a time position obtained by subtracting a predetermined time from the read recording elapsed time and the block recording data not including the elapsed time read from the nonvolatile memory circuit are deleted and deleted. As a recordable area later, the means to register in the table of contents information, and reset the flag indicating that the power supply is down,
The optical disk recording apparatus according to claim 1, wherein the optical disk recording apparatus is configured to write in a nonvolatile memory circuit.