JPH06150630A - Information recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Structure] An optical pickup 1, a signal processing circuit 3 for demodulating an RF signal into digital information, a shock proof memory 5 for storing digital information, and the digital information is expanded to its original size. Data decompression / compression circuit 6 to be restored
A recording head 15, an input device 16, and a system controller 12 for controlling each of the above devices and circuits. The disk 2 is manually input to the input device 16.
1 is instructed to erase the digital information such as the music recorded on the disc 1, the system controller 12 rewrites the track number of the user TOC area of the disk 21 instead of erasing the music instructed to erase, and the system controller 12 is instructed to erase. The read-out music piece is prevented from being read out, and the program area in which this music piece is recorded is set as a recordable area. [Effect] It becomes possible to improve the utilization efficiency of the recording area of the disc.

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 capable of digitizing analog information and recording it on a recording medium such as a magneto-optical disk at a high density.

[0002]

2. Description of the Related Art Conventionally, a technique for digitizing information on a recording medium and recording it at a high density has been developed. An information recording / reproducing apparatus using this technique is, for example, a recording medium for recording digital information such as voice data. There is known a digital audio tape recorder (DAT) using a cassette tape (hereinafter referred to as a tape). The tape is composed of a main data area for recording digital information (hereinafter referred to as music) and a sub-data area for writing information necessary for high speed search such as the number of each music and the length of playing time. A recording area is formed. The DAT is the main data of the tape.
Each song is recorded in the area, and the above information or subcodes such as a start ID which is a cueing signal of the song are recorded in the sub-data areas formed at the beginning of each song. , High-speed access to each song is possible.

As shown in FIG. 5 (a), for example, music A to music D is recorded on the tape, and when it is desired to erase music B, the above DAT is recorded in the main data area. Instead of erasing the tune B being played, the start ID written in the sub data area of the tune B is erased and a skip ID, which is a signal for fast-forwarding the unnecessary portion, is recorded, as shown in FIG. It is supposed to do. This prevents song B from being read, and DAT
When the tape is played back, the song B is fast-forwarded and skipped, and each song is played in the order of song A-> song C-> song D.

[0004]

However, the DAT which is the above-mentioned conventional information recording / reproducing apparatus is, for example, as shown in FIG.
If a new song is recorded on the tape shown in (b), the song D
It is designed to write a new song behind. That is, song B
The main data area in which is recorded is not reused as a recordable area even after the song B is no longer read.

As described above, the conventional information recording / reproducing apparatus has a problem that the recording medium cannot be effectively used because the recordable area of the tape does not increase even if the music is erased.

The present invention has been made in view of the above problems, and when the digital information is erased, the recording area in which the digital information is recorded is set as a recordable area, thereby making a recording medium. It is an object of the present invention to provide an information recording / reproducing device capable of improving the utilization efficiency of the.

[0007]

In order to solve the above-mentioned problems, the information recording / reproducing apparatus of the present invention records time-axis compressed data at a predetermined compression rate as a plurality of individually completed data groups. Using a recording medium having a program area for storing information and a writing area in which a user can arbitrarily write information, an optical pickup for reading data and information from the recording medium, and recording data and information on the recording medium In an information recording / reproducing apparatus including a recording head, input means for inputting information to the recording medium, and control means for controlling the optical pickup, recording head and input means, the information is recorded on the recording medium. In addition to providing an instruction means capable of manually and arbitrarily instructing deletion of the data group, the control means instructs the deletion of the data group by the instructing means. In this case, the reading order of the remaining data groups excluding the data group instructed to be erased is set so that the data group instructed to be erased is not read out, and the data group is read out in this reading order. On the other hand, while recording the above reading order in the writing area of the recording medium,
It is characterized in that a program area in which a data group instructed to be erased is recorded is a recordable area.

[0008]

According to the above construction, when the erasing of the data group recorded on the recording medium is manually instructed by the instructing means, and when the erasing of the data group is instructed by the instructing means, the erasing instruction is issued. In order to prevent the read data group from being read, the read order of the remaining data groups excluding the data group instructed to be erased is set, and the control means is configured to read the data group in the set read order. The reading order is recorded in the writing area of the recording medium. Further, the program area in which the data group instructed to be erased by the control means is recorded is a recordable area.

As a result, the program area in which the data group instructed to be erased is recorded becomes the recordable area, so that the utilization efficiency of the recording medium can be improved. Further, when erasing of the data group recorded on the recording medium is instructed, the remaining data group excluding the data group instructed to be erased is read out so that the data group instructed to be erased is not read out. It is possible to automatically set the order and record in the writing area of the recording medium. Therefore, the operability of the information recording / reproducing apparatus is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a magneto-optical disk device will be described below with reference to FIGS.

The magneto-optical disk apparatus as the information recording / reproducing apparatus according to the present embodiment digitizes and records analog information such as voice data recorded on the magneto-optical disk, and the magneto-optical disk is recorded by the user. It has a writing area (described later) in which information can be arbitrarily written. As shown in FIG. 1, such a magneto-optical disk device includes an optical pickup 1, an RF amplifier 2, an encoder / decoder / signal processing circuit 3, a memory controller 4, a shock proof memory 5, and a data decompression / decompression device. Compression circuit 6
A converter 7, a feed motor 8, a spindle motor 9, a driver circuit 10, a servo control circuit 11,
The system controller 12, the power supply circuit 13, the head drive device 14, the recording head 15, and the input device 16 are provided.

To explain the reproducing operation, the optical pickup 1 is a reproducing head which irradiates a disk 21 as a recordable / reproducible recording medium with light and takes in reflected light from the disk 21, and is recorded on the disk 21. It is designed to read RF signals. 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. Further, the RF amplifier 2 is adapted to generate servo control signals such as a focus error signal and a tracking error signal from the RF signal and send them to the servo control circuit 11. An encoder / decoder / signal processing circuit (hereinafter, referred to as a signal processing circuit) 3 is provided so as to be communicable with the system controller 12 for processing subcodes and the like, and demodulates the RF signal that has passed through the RF amplifier 2. The digital information is converted into digital information, the digital information is subjected to predetermined processing such as error correction, and the digital information is 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 of the system controller 12 so that the digital information passed through 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, for example, a 1 Mbit DRAM (Dynami).
A semiconductor memory such as c Random Access Memory) is suitable. The shock proof memory 5 includes a signal processing circuit 3
And the data expansion / compression circuit 6 to protect digital information in order to prevent interruption of recording / reproduction due to disturbance such as vibration, and digital information output from the signal processing circuit 3. It is provided for the purpose of absorbing the difference between the transfer rate of the digital data and the transfer rate of the digital information input to the data expansion / compression circuit 6.

The data decompression / compression circuit 6 time-decompresses the digital information output from the memory controller 4 and time-compressed at a predetermined compression ratio, and the D / of the converter 7
The data is transferred to the A converter 7a, reproduced to the original analog information here, 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 is a motor for moving the optical pickup 1 in a direction orthogonal to a recording track (not shown) of the disk 21. 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
It is a circuit that feedback-controls each of the above-described devices driven by the driver circuit 10 so that the operation of causing the light emitted from the optical disc to follow the 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 control circuit 11, and the head drive device 14. The input device (input means, instruction means) 16 is composed of switches and keys (not shown). For example, after the switch is turned on to enable input, it is recorded on the disk 21 by a manual input operation using a keyboard or the like. A processing operation such as erasing a plurality of digital information (hereinafter referred to as a data group) is input to the system controller 12. Then, the system controller 12 controls each of the above devices so that a plurality of data groups recorded in the disk 21 are processed based on the processing operation input from the input device 16.
While controlling the circuit, the address data in the writing area of the disk 21 is rewritten via the head driving device 14 and the recording head 15 as described later.

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 system controller 12, the servo control circuit 11, the head drive device 14, and the like.

The recording operation will be described. Input terminal 1
Reference numeral 9 is connected to an input unit (not shown) having a microphone or the like, and the A / D converter 7b converts the analog information input from the input terminal 19 into digital information and transfers it to the data expansion / compression circuit 6. Has become. The data expansion / compression circuit 6 uses the time axis of the digital information output from the A / D converter 7b as a predetermined compression rate, for example, about 1
The data is compressed to / 5 and transferred to the memory controller 4. The memory controller 4 transfers the digital information output from the data expansion / compression circuit 6 to the shock proof memory 5, and transfers the digital information output from the shock proof memory 5 to the signal processing circuit 3. . Therefore, the shock proof memory 5 also aims to absorb the difference between the transfer speed of the digital information output from the data expansion / compression circuit 6 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. Further, the recording head 15 records the reproduction order (reading order) of the data group in the writing area of the disk 21.

In the above structure, the RF signal is read from the disc 21 by the optical pickup 1 during reproduction. 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 control 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 drive device for the objective lens 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 information sent to the memory controller 4 is written in 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.

At the time of recording, 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. The data is temporarily stored in the memory 5 and read out to the memory controller 4 in the order of writing. And
The digital information sent to the memory controller 4 is
The signal processing circuit 3 performs the modulation and the predetermined signal processing to perform the RF.
The recording head 1 via the head drive device 14 as a signal.
5 and is recorded in the recording area of the disc 21 by the interaction with the light from the optical pickup 1.

Next, the disk 21 used in the magneto-optical disk device having the above structure will be described. As shown in FIG. 2, the disc 21 has a lead-in area in which a disc control signal and the like are recorded in order from the inner circumference side to the outer circumference side, and information regarding a plurality of recorded data groups by the user. User TOC (Ta
ble of contents) area, a program area in which a plurality of individually completed data groups are recorded, and a lead-out area in which disk control signals and the like are recorded. The user TOC area and the program area form a recording area.

In the user TOC area, a data area (hereinafter referred to as an area) is formed in the format shown in FIG. 3, and a plurality of individually completed data groups, for example, a music program of a plurality of songs (hereinafter, referred to as an area). The reproduction order of songs) is recorded. In the following description, the case where four pieces of music are recorded on the disk 21 will be taken as an example.

In the above user TOC area, map numbers (0, 1, 2, ...) Are sequentially assigned to each area constituting the user TOC area starting from the inner circumference side, and map number 0 is assigned. Areas other than open areas are rewritable. And in the figure, map number L
In the area to which (where L is a natural number) is recorded the number of songs TNO indicating the total number of songs recorded on the disk 21, and in the area to which the map number L + 1 is assigned, Start RA1 is recorded. The start RA1 is recorded with a map number indicating the area in the program area in which the address data of the recordable area RA1 capable of recording music is written. If the recordable area RA is divided into two or more areas, the start RA2 is recorded in the area to which the map number L + 2 is given, and the start RA2 is recorded in the second recordable area. A map number indicating an area in which address data of a certain recordable area RA2 is written is recorded.

Play track numbers PNO.1 to PNO.4 are recorded in the areas to which map numbers M to M + 3 (M is a natural number) are assigned. These play track numbers PNO.1 to PNO.4 are recorded with map numbers indicating the areas in which the address data of each song is written. Further, the address data of each song is written in the area to which map numbers N to N + 4 (N is a natural number) are given. These address data include
Values (hereinafter, referred to as a start address and an end address, respectively) indicating the first address and the last address of the recording position of each music in the program area are written. For example, in the example shown in FIG. 3, the first song (start address, end address) is (0, 9), and the second, third, and fourth songs are (10, 1), respectively.
9), (20,29) and (30,39).
A value (40,999) indicating the first address and the last address of the recordable area RA1 is written in the area assigned the map number N + 4.

The play track number PNO.1 is
Corresponding to the address data with map number N, play track numbers PNO.2 and PNO.
Address data assigned map numbers N + 1, N + 2, and N + 3 correspond to PNO.3 and PNO.4 in this order. Further, the start RA1 corresponds to the address data given the map number N + 4. Therefore, in the example shown in FIG. 3, “N + 4” is written in the start RA1 and “N” is written in the play track number PNO.1, and in the play track numbers PNO.2, PNO.3, PNO.4. “N + 1”, “N + 2”, and “N + 3” are written in this order. Since there is no recordable area RA2, "0" is written in the start RA2.

In the above structure, when the magneto-optical disk device reads the play track number PNO.1 by the optical pickup 1, the address data of the map number N is read next, and the start address (that is, 0) of this address data is read. ), The reproduction of the first song is started, and when the end address (that is, 9) is reproduced, the play track number PNO.2 is subsequently read and the second song is similarly reproduced. When the end address (that is, 39) of the fourth music is reproduced, the reproduction of the disc 21 is completed.

Next, the erasing operation of the music recorded on the disk 21 in this magneto-optical disk device will be described. In the following description, as shown in FIG. 4A, the first song at addresses 0-9 of the program area, the second song at addresses 10-19, the third song at addresses 20-29,
An example is given in which the fourth piece of music is recorded at addresses 30 to 39, and the second piece of music on the disk 21 in which the addresses 40 to 999 are the recordable area RA1 is instructed to be erased.

First, after the DELETE key (not shown) of the input device 16 is turned on to enable input, a manual input operation using a keyboard or the like instructs to erase the second song of the songs recorded on the disk 21. The system controller 12 rewrites the user TOC area instead of erasing the second song recorded in the program area of the disc 21.

That is, as shown in FIG. 3B, the system controller 12 changes the number of songs TNO recorded in the user TOC area from "4" to "3" and the play track number PNO. Rewrite from "N + 1" to "0".
In this way, by rewriting the play track number PNO.2 to "0", the second song recorded in the program area cannot be read out and the erased instruction
The program area in which the tune is recorded is the recordable area R
A2. Then, since the recordable area RA2 is formed, the system controller 12 changes the start RA2 recorded in the user TOC area from “0” to “N +”.
Rewrite as 1 ”.

Further, as shown in (c) of the figure, in order to make the play track number PNO.n a continuous number, the play track number PNO.
3 to PNO.2, play track number PNO.4 of the 4th song
To PNO.3, and the address data is transferred to the areas to which the map numbers corresponding to these newly set play track numbers PNO.2 and PNO.3 are given. Therefore, the disc 21 will be 1 after the next reproduction.
Each song is reproduced in the order of the song, the previous third song, and the previous fourth song.

In the above description, the case where one piece of music is instructed to be erased is shown as an example.
It is also possible to instruct to erase more than the song. Also, the number of songs recorded on the disc 21 is not limited to the above four songs, of course.

As described above, the present magneto-optical disk device is
When an instruction to erase the music recorded on the disk 21 is given by a manual input operation to the input device 16 including a switch and a key, the system controller 12 causes the head drive device 14 and the recording head 15 to move the data to the user TOC area of the disk 21. Rewrite the recorded play track number PNO.n and address data. That is, when the above erasing operation is performed, instead of erasing the song recorded in the program area, the song is read by rewriting the play track number PNO.n of the song instructed to be erased to "0". Try not to. In addition, the program area in which the erase-instructed song is recorded is a recordable area R
At the same time, the system controller 12 automatically resets the play track numbers PNO.n so as to be continuous, and the reset play track numbers PNO.n are transferred to the user TOC area of the disc 21 via the recording head 15. Write.

Therefore, by setting the program area in which the erasing-instructed music is recorded as the recordable area RA, it becomes possible to newly record the music in this recordable area RA, and the use efficiency of the recording medium is improved. improves. In addition, since the remaining music except the music instructed to be erased can be continuously reproduced, the operability of the magneto-optical disk device is improved.

[0039]

As described above, the information recording / reproducing apparatus of the present invention is provided with the instruction means capable of manually instructing the erasure of the data group recorded in the recording medium, and by the control means. When the erasing of the data group is instructed by, the reading order of the remaining data groups excluding the erasing instructed data group is set so that the erasing instructed data group is not read. The above-mentioned reading order is recorded in the writing area of the recording medium so that the data group is read out in the same manner, while the program area in which the data group instructed to be erased is recorded is the recordable area.

As a result, the program area in which the data group instructed to be erased is recorded becomes the recordable area, so that it is possible to improve the utilization efficiency of the recording medium. Further, when erasing of the data group recorded on the recording medium is instructed, the remaining data group excluding the data group instructed to be erased is read out so that the data group instructed to be erased is not read out. Since the order can be automatically set and the data can be recorded in the writing area of the recording medium, the operability of the information recording / reproducing apparatus is also improved.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing each area formed on a disk used in the magneto-optical disk device described above.

FIG. 3 is an explanatory diagram of a user TOC area of the disc.

FIG. 4 is an explanatory diagram showing a manner in which a user TOC area of a disc is rewritten when a song is erased by the magneto-optical disc device.

FIG. 5 is an explanatory diagram showing a state in which a sub data area of a tape which is a recording medium is rewritten when a song is erased by DAT as a conventional information recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 optical pickup 2 RF amplifier 3 encoder / decoder / signal processing circuit 4 memory controller 5 shock proof memory 6 data decompression / compression circuit 7 converter 12 system controller (control means) 14 head drive device 15 recording head 16 input device (input means, input device, 21) disc (recording medium)

Claims (1)

[Claims] 1. A recording having a program area for recording time-compressed data at a predetermined compression rate as a plurality of individually completed data groups and a writing area in which a user can arbitrarily write information. An optical pickup that uses a medium to read data and information from the recording medium, a recording head that records the data and information on the recording medium, an input unit that inputs information to the recording medium, and the optical pickup. An information recording / reproducing apparatus comprising a recording head and a control means for controlling an input means, further comprising an instruction means capable of manually instructing erasure of a data group recorded in the recording medium, and When the control unit instructs the erasing of the data group by the instructing unit, the erasing instruction is made so that the data group instructed to be erased is not read. The read order of the remaining data groups excluding the read data group is set, and the read order is recorded in the write area of the recording medium so that the data groups are read in the read order. An information recording / reproducing apparatus characterized in that a program area in which a data group is recorded is a recordable area.