JPH0729357A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To suppress imperfection of index information to be caused when a power supply is cut off at the time of recording data to a min. CONSTITUTION:A data amt. of digital information to be temporarily stored in a data area of a shockproof memory 5 is detected by a memory controller 4 in monitoring an address of the shockproof memory 5. When it is detected by the memory controller 4 that a data amt. reaches half the amt., TOC information corresponding to contents of data of a disk 21 after recording the digital information is produced, and is recorded in a TOC area of the disk 21 by a system controller 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus such as a magneto-optical recording / reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, the data is TOC (Table Of Contents).
nts) A recording medium managed by index information such as information is used, and when the recording medium is attached to the apparatus, the index information is read out and stored in a storage means such as an IC memory and stored in this storage means. Some controls the reproduction, recording, and editing of data based on the index information, which will be described below.

Reproduction of data is performed by recognizing the delimiter of data by the index information stored in the storage means, and recording of data can be performed in the recording medium by the index information stored in the storage means. After recognizing the area and recording the data, the index information stored in the storage unit is rewritten with the index information according to the recording result, and the index information of the recording medium is rewritten with the index information of the storage unit. Then, editing such as data division, connection, deletion, etc. is performed based on the index information stored in the storage means, and after the index information stored in the storage means is rewritten to the index information according to the editing result, The index information of the recording medium was rewritten.

[0004]

However, in the above-mentioned conventional apparatus, after the index information is changed by recording the data, power is supplied to the device before the changed index information is recorded on the recording medium or during the recording of the data. If the index is cut off, the index information of the recording medium becomes incomplete, and even if the index information is read out and the reproduction, recording, and editing are controlled, accurate control cannot be performed. That is, there is a problem that all the data related to this recording cannot be reproduced.

An object of the present invention is to provide an information recording / reproducing apparatus capable of minimizing the incompleteness of index information generated when the power supply is cut off.

[0006]

According to the present invention, a recording medium having reproduced data and index information recorded therein is used, and a read means for reading the reproduced data and index information from the recording medium, and a read means for reading the read data. First storage means for storing index information, and the first storage means
A control means for controlling reproduction, recording, and editing of data based on the index information stored in the storage means, and when recording and editing of data is performed by the control means,
When data is recorded by the control means in an information recording apparatus for storing index information corresponding to the index information in the first storage means and rewriting the index information stored in the first storage means to the index information of the recording medium Second storage means for temporarily storing the data to be recorded on the recording medium and data amount detection means for detecting the data amount of the data stored in the second storage means are provided on the other hand, while the control means is When data was recorded,
Based on the detection result from the data amount detecting means, index information corresponding to the data is stored in the first storage means, and the index information stored in the first storage means is rewritten to the index information of the recording medium. Is.

[0007]

Therefore, even when the power supply is cut off during data recording, it is detected that the data amount of the second storage means for temporarily storing the data to be recorded on the recording medium has reached a predetermined value. When the means detects, the index information corresponding to the data stored in the second storage means is stored in the first storage means, and the index information stored in the first storage means is rewritten to the index information of the recording medium. Therefore, even if the power supply is cut off before the entire data is recorded on the recording medium, the reproduction data and the index information are recorded on the recording medium for each predetermined section, and the reproduction data up to that point is recorded on the recording medium. It can be reproduced according to the index information.

[0008]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic structure of a magneto-optical disk apparatus as an information recording / reproducing apparatus which is an embodiment of the present invention, and FIG. 2 shows a recording state of a disk used in the magneto-optical disk apparatus. 3 is an explanatory view showing the contents recorded in the user TOC area of the disc, and FIG. 4 is a flow chart showing the data recording operation of the magneto-optical disc device. The magneto-optical disk device as the information recording / reproducing apparatus according to the present invention is adapted to digitize and record analog information such as audio data on the magneto-optical disk.

Referring to FIG. 1, a data reproducing operation will be described. The optical pickup 1 irradiates a disk 21 as a recording / reproducing recording medium with light, and the disk 21
It is a reproducing head that captures the reflected light from
The RF signal recorded in 1 is read.
The RF amplifier 2 amplifies the RF signal read by the optical pickup 1 and sends it to the encoder / decoder / signal processing circuit 3. Also, RF amplifier 2
Generates a servo control signal such as a focus error signal and a tracking error signal from the signal, and the servo circuit 4
It is designed to be sent to. Encoder / Decoder /
The signal processing circuit (hereinafter referred to as a signal processing circuit) 3 includes a system controller 12 for processing subcodes and the like.
It is provided so that it can communicate with
The F signal is demodulated and converted into digital information, and the digital information is subjected to predetermined processing such as error correction and transferred to the memory controller 4.

The memory controller 4 includes a signal processing circuit 3
The writing operation and the reading operation of the shock proof memory 5 are controlled in accordance with the instruction from the system controller 12 so that the digital information after the above is stored in the shock proof memory 5. The memory controller 4 transfers the digital information output from the signal processing circuit 3 to the shock proof memory 5 and transfers the digital information output from the shock proof memory 5 to the data expansion / compression circuit 6. There is.

The shock proof memory 5 is adapted to temporarily store the digital information output from the signal processing circuit 3, and a DRAM (Dynamic Random Access).
Memory). The shock proof memory 5 is arranged between the signal processing circuit 3 and the data expansion / compression circuit 6, and protects digital information in order to prevent interruption of recording / reproduction due to disturbance such as vibration. For the purpose of absorbing the difference between the transfer rate of digital information output from the signal processing circuit 3 and the transfer rate of digital information input to the data decompression / compression circuit 6, and storing index information. It is provided.

The data decompression / compression circuit 6 decompresses the digital information output from the memory controller 4 and time-compressed at a predetermined compression rate on a time axis to obtain a D signal from the comparator 7.
The data is transferred to the A / A converter 7a, reproduced here to the original analog information, and then output to the output terminal 18. Output terminal 18
Is connected to an output unit (not shown) having a speaker and the like. The A / D converter 7b will be described later. The feed motor 8 moves the optical pickup 1 to the disc 21.
Is a motor for moving in a direction perpendicular to the recording track (not shown). The spindle motor 9 is a motor for rotating the disk 21. The driver circuit 10 supplies electric power to the feed motor 8, the spindle motor 9, and a drive device (not shown) that drives the objective lens (not shown) of the optical pickup 1 in order to operate them. There is.

The servo control circuit 11 includes an optical pickup 1
This is a circuit for field-back controlling each of the above-mentioned devices driven by the driver circuit 10 so that an operation such as causing light emitted from the optical disc to follow a target recording track of the disk 21 is accurately performed. This servo control circuit 11
According to an instruction from the system controller 12, a control amount such as focus, tracking and spin is determined based on the servo signal output from the RF amplifier 2, and the control amount is sent to the driver circuit 10 as a control signal. .

System controller (control means) 12
Is a microcomputer that centrally manages the signal processing circuit 3, the memory controller 4, the servo circuit 11, the power supply circuit 13, and the head drive device 14. Input device 1
6 is composed of a switch, a key, etc. not shown,
For example, after a switch is turned on to enable input, a manual input operation with a keyboard or the like causes a plurality of processing operations such as writing and erasing of a plurality of digital information on the disk 21, and a plurality of data recorded on the disk 21. The reproduction order (readout order) is input to the system controller 12.

The power supply circuit 13 includes the optical pickup 1 and RF.
Power is supplied to the amplifier 2, the signal processing circuit 3, the driver circuit 10, the servo control circuit 11, and the head drive device 14.

To describe the data recording operation, the input terminal 19 is connected to an input section (not shown) having a microphone and the like, and the A / D converter 7b converts the analog information input from the input terminal 19 into digital information. The data is then transferred to the data expansion / compression circuit 6. The data decompression / compression circuit 6 compresses the time axis of the digital information output from the A / D converter 7b to a predetermined compression rate, for example, about 1/5 and transfers it to the memory controller 4.

The memory controller 4 transfers the digital information output from the data decompression / compression circuit 6 to the shock proof memory 5 and is stored in the shock proof memory 5 when the digital information is not read from the shock proof memory 5. The data amount of the digital information is detected by monitoring the address of the shock proof memory 5, and the detection result is output to the system controller 12. Then, when the data amount of the shock proof memory 5 reaches a predetermined value, the system controller 12 outputs the digital information stored in the shock proof memory 5 to the signal processing circuit. At this time,
The memory controller 4 also aims to absorb the difference between the digital information output from the shock proof memory 5 and the transfer speed of the digital information input to the signal processing circuit 3.

The signal processing circuit 3 includes a memory controller 4
The digital information output from the device is modulated, converted into an RF signal, and transferred to the head drive device 14. The head driving device 14 transfers the RF signal output from the signal processing circuit 3 to the recording head 15, and also allows the recording head 15 to accurately record the RF signal on the target recording track of the disk 21. The recording head 15 is moved in a direction orthogonal to the recording track of the disk 21. The recording head 15 records the RF signal in the recording area of the disk 21. The recording head 15 records the index information in the writing area of the disc 21.

As shown in FIG. 2, the disc 21 used for recording and reproducing has a lead-in area in which disc control signals and the like are recorded in order from the inner peripheral side to the outer peripheral side of the disc, as shown in FIG. User T as a writing area for writing information about a plurality of recorded data groups
It has an OC area, a program area for recording a plurality of individually completed data groups, and a lead-out area in which a disk control signal and the like are recorded.

A data area is formed in the user TOC area, and the user TOC area starts from the inner circumference side.
Map numbers (0, 1, 2,
...) are added, and areas other than the area where 0 is added to the map number are rewritable.

3, in the area to which the map number L (where L is a natural number and a constant) is given, the number of songs TNO indicating the total number of the songs recorded on the disk 21 is recorded. In this example, 5 is recorded. In the area to which the map L + 1 is added, address data RA1 indicating the map number of the recordable area of the music in the program area is recorded, and in this example, N + 5 is recorded.

In the area to which the map numbers M to M + 4 (M is a natural number and a constant) are given, play track numbers (PNO.1 to PNO) indicating the map numbers in which the address data of the respective songs are written. . 5) is recorded, and in this example, N, N + 1, ..., N + 4 are recorded. Furthermore, map numbers N to N + 5 (however, N
The address data of each song is written in the area to which is a natural number). Values indicating the first address and the last address of the music position of each music in the program area are written in these address data, and in this example, the (start address, end address) of the first music is (0, 9). The second song is recorded as (10, 19), the third song is (20, 29), the fourth song is (30, 39), and the fifth song is (40, 49). Then, values indicating the first address and the last address of the recordable area RA1 are recorded in the area to which the map number N + 5 is given, and in this example, (50,999).
Is recorded.

In the above structure, when the disc 21 is mounted on the magneto-optical disc device, the optical pickup 1
The RF signal is read from the user TOC area of the disk 21. Then, the RF signal is amplified by the RF amplifier 2, demodulated or subjected to predetermined signal processing by the signal processing circuit 3 and restored as TOC information, and then the memory controller 4
And is stored in the TOC storage area provided in the shock proof memory 5.

At the time of reproduction, the memory controller 4 reads out the required TOC information from the TOC storage area of the shockproof memory in response to a request from the system controller 12 and sends it to the system controller 12. Then, the system controller 12 makes the servo circuit 1 based on the TOC information.
Control 1

When a disc playback command is issued from the input device 16, the system controller 12 recognizes the start address and end address of each song from the TOC information, and based on this information, an optical pickup is performed from the program area of the disc 21. The RF signal is read by 1. This RF signal is amplified by the RF amplifier 2, demodulated or subjected to predetermined signal processing by the signal processing circuit 3, restored as digital information, and sent to the memory controller 4. At this time, the digital information is data in a time axis compressed state.

On the other hand, the RF signal amplified by the RF amplifier 2 is also sent to the servo circuit 11 as a servo control signal used for feedback control. Servo control circuit 1
1 determines the control amount according to an instruction from the system controller 12 based on the servo control signal, and outputs the control signal to the driver circuit 10. Then, the driver circuit 10 operates the feed motor 8, the spindle motor 9, and the objective lens driving device of the optical pickup 1 according to the magnitude of the control signal. As a result, the optical pickup 1 is sent to the target recording track, the rotation speed of the disk 21 is controlled to a predetermined value, and the position of the objective lens (not shown) is driven so as to accurately follow the recording track.

The digital signal sent to the memory controller 4 is written in the data area of the shock proof memory 5 and temporarily stored therein, and is read out to the memory controller 4 in the order in which it was written. Then, the digital information output from the memory controller 4 is sent to the data decompression / compression circuit 6, where it is time-axis decompressed. The digital information that has passed through the data decompression / compression circuit 6 is converted into original analog information by the D / A converter 7a, sent from the output terminal 18 to an output unit (not shown), and output as a voice signal, for example.

Further, at the time of recording, the TO controller which requires the memory controller 4 in response to a request from the system controller 12
The C information is read from the TOC storage area of the shock proof memory and sent to the system controller 12. Then, the system controller 12 controls the servo circuit 11 based on the TOC information.

When a data recording command is issued from the input device 16, the system controller 12 recognizes the start address and end address of the recordable area RA of the disk 21 based on the TOC information, and the area for recording based on the recordable area RA. Is selected, the servo circuit 11 sends the optical pickup 1 and the recording head 15 to a target recording track to control the number of revolutions of the disk 21 to a predetermined value, and the position of an objective lens (not shown) accurately moves the recording track. Driven to follow.

Then, the analog data is input to an input section (not shown) and sent to the input terminal 19 as analog information. This analog information is converted to digital information by the A / D converter 7b, and then sent to the data expansion / compression circuit 6, where it is time-axis compressed at a predetermined compression rate and sent to the memory controller 4 for shock proofing. It is temporarily stored in the data area of the memory 5.

When the memory controller 4 is not reading the digital information temporarily stored in the data area of the shock proof memory 5, the memory controller 4 shocks the data amount of the digital information stored in the data area of the shock proof memory 5. When it is detected by monitoring the address of the proof memory 5 and it is detected that the digital information is stored in the shock proof memory 5 up to a predetermined amount (half in this embodiment), the detection result is output to the system controller 12. To do.

Based on the detection result from the memory controller 4, the system controller 12 determines the data recording content of the disc 21 after recording the digital information stored in the data area of the shock proof memory 5 on the disc 21. While creating the corresponding TOC information, the memory controller 4 is controlled to rewrite the TOC information stored in the TOC storage area of the shock proof memory 5 with the TOC information created by the system controller 12.

The TOC information stored in the TOC storage area of the shock proof memory 5 before the digital information is fully stored in the shock proof memory 5 is modulated by the signal processing circuit 3 or subjected to predetermined signal processing. Then, it is converted into an RF signal, sent out to the recording head 15 via the head drive circuit 14, and recorded in the user TOC area of the disk 21 by the interaction with the light from the optical pickup.

Thereafter, when the memory controller 4 detects that the digital information in the shock proof memory 5 has been stored up to the full capacity, it outputs the detection result to the system controller 12, and the system controller 12 stores the memory based on the detection result. Control the controller 4,
The digital information stored in the data area of the shock proof memory 5 is read in the order of writing, and the read digital information is subjected to modulation and predetermined signal processing in the signal processing circuit 3 to be an RF signal, It is sent to the recording head 15 via the head drive circuit 14 and recorded in the program area of the disk 21 by the interaction with the light from the optical pickup 1.

At this time, the digital information stored in the data area of the shock proof memory 5 and the digital information read from the data area of the shock proof memory 5 by the memory controller 4 have different transfer speeds, and the transfer speed of the shock proof memory 5 is different. It is faster to read from the data area. Therefore, the data amount of the digital information stored in the data area of the shock proof memory 5 drops to half, but the memory controller 4 reads the digital information from the data area of the shock proof memory 5 and detects the data amount. Therefore, the system controller 12 does not create the TOC information corresponding to the data recorded contents of the disc 21 after recording the digital information stored in the data area of the shock proof memory 5 on the disc 21, Disk 2
Writing to the TOC area of 1 is also not performed.

When the data amount of the digital information stored in the data area of the shock proof memory 5 is reduced to a predetermined amount (0 in this embodiment),
The system controller 12 controls the memory controller 4 to stop the reading of digital information from the data area of the shock proof memory 5. At this time, if an analog signal is input from the input section (not shown), the same operation as above is repeated, and if an analog signal is not input, it is determined that the data recording is finished and Stop the operation.

The recording operation at this time will be briefly described with reference to the flowchart of FIG.

In step F1, it is confirmed whether the disc 21 is loaded, and if it is loaded, the process proceeds to step F2. Then, the user TOC information is read in step F2, and the process proceeds to step F3.

In step F3, it is judged whether or not to record the data in the program area of the disk 21, and when it is not recorded, this flow chart is ended. When it is recorded, the process proceeds to step F4, in which the program of the disk 21 is recorded. The storage of the data to be recorded in the area in the shock proof memory 5 is started, and the process proceeds to step F5.

In step F5, it is judged whether the amount of data stored in the shock proof memory 5 has reached half, and if it has not reached half, this judgment is repeated until it reaches half, and then half is reached. If so, the process proceeds to step F6, where the TOC information corresponding to the program area of the disk 21 when this data is recorded in the program area of the disk 21 is created and recorded in the user TOC information of the disk 21. Move to F7.

In step F7, it is judged whether or not the amount of data stored in the shock proof memory 5 is full. If not, this judgment is repeated until it becomes full, and then it becomes full. If so, the process proceeds to step F8, where the shock proof memory 5
The data stored in the program area of the disk 21 is recorded in the program area of the disk 21. When there is no more data in the shock proof memory 5, the process proceeds to step F9.

In step F9, it is judged whether or not the data to be recorded in the program area is no longer input, and if it is input, the process proceeds to step F4. If it is not input, the data in the program area of the disk 21 is entered. After confirming that the recording is completed, this flowchart is completed.

Thus, when the data amount of the digital information temporarily stored in the data area of the shock proof memory 5 becomes half, the data content of the disc 21 after the digital information is recorded on the disc 21. The TOC information corresponding to the
Since the data is recorded in the area C, even if the power supply is cut off due to a power failure or the like before the analog signal is not input from the input unit (not shown), the TOC information corresponding to the data recording immediately before the power supply cutoff is recorded. It is recorded on the disk 21, and when the power supply is restored, based on this TOC information,
It is possible to reproduce the data recorded just before the power supply is cut off.

Further, at the time of editing, the TO controller which requires the memory controller 4 in response to a request from the system controller 12
The C information is read from the TOC storage area of the shock proof memory 5 and sent to the system controller 12. Then, the system controller 12 edits based on the TOC information.

When a data editing command is issued from the input device 16, the system controller 12 edits the data such as division, connection, deletion, etc. by inputting a ten-key or the like provided on the input device 16 based on the TOC information read. The edited TOC information can be stored in the memory controller 4
Is stored in the TOC storage area of the shock proof memory 5 via the, and is recorded in the user TOC area of the disk 21 as in the recording operation.

[0047]

As described above, according to the present invention, when the recording data temporarily stored in the second storage means reaches a predetermined amount, the recording data stored in the second storage means is stored in the storage medium. By creating index information corresponding to the data contents of the recording medium after recording on the recording medium and recording it on the recording medium, even if the power supply is cut off by a power failure etc. before the recording operation is completely completed, the power supply Since the index information corresponding to the data recording immediately before the power supply was cut off is recorded on the recording medium, control the data that was recorded just before the power supply was cut off based on the index information when the power supply was restored. It is possible to minimize the amount of recorded data that cannot be controlled.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a magneto-optical disk device as an information recording / reproducing device which is an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a recorded state of a disc used in the magneto-optical disc device.

FIG. 3 is an explanatory diagram showing contents recorded in a user TOC area of the magneto-optical disc.

FIG. 4 is a flowchart showing a data recording operation of the magneto-optical disk device.

[Explanation of symbols]

 1 optical pickup 2 RF amplifier 3 encoder / decoder / signal processing circuit 4 memory controller 5 shock proof memory 6 data expansion / compression circuit 7 converter 8 feed motor 9 spindle motor 10 driver circuit 11 servo control circuit 12 system controller 13 power supply circuit 14 head Drive circuit 15 Recording head 16 Input device 21 Disc

Claims (1)

[Claims] 1. A recording medium on which reproduction data and index information are recorded is used, and a reading means for reading the reproduction data and index information from the recording medium, and a first storage for storing the index information read by the reading means. Means and control means for controlling reproduction, recording, and editing of data based on the index information stored in the first storage means, and when recording and editing of data is performed by the control means, In the information recording device for storing the corresponding index information in the first storage means and rewriting the index information stored in the first storage means to the index information of the recording medium, when recording data by the control means, Second storage means for temporarily storing data to be recorded on the recording medium, and the second storage means While the data amount detecting means for detecting the data amount of the stored data is provided, the control means responds to the data based on the detection result from the data amount detecting means when the data is recorded. An information recording / reproducing apparatus, characterized in that the index information stored in the first storage means is stored in the first storage means, and the index information stored in the first storage means is rewritten into the index information of the recording medium.