JP2901439B2 - Information recording / reproducing device - Google Patents

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 which can digitize analog information and record it on a recording medium such as a magneto-optical disk at a high density.

[0002]

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

[0005] As shown in FIG. 5 (a), for example, songs A to D are recorded on a tape, and when it is desired to erase song B, the DAT is recorded in the main data area. Instead of erasing the song B, the start ID written in the sub-data area of the song B is erased and a skip ID which is a signal for fast-forwarding an unnecessary portion is recorded as shown in FIG. It is supposed to. As a result, song B is not read out, and DAT
When the tape is reproduced, the music B is fast-forwarded and skipped, and each music is reproduced in the order of the music A → the music C → the music D.

[0004]

However, the DAT which is the conventional information recording / reproducing apparatus is, for example, shown in FIG.
When a new song is recorded on the tape shown in FIG.
Is to write a new song behind. That is, song B
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 used effectively because the recordable area of the tape does not increase even if the music is erased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. When erasing digital information, the recording area in which the digital information has been recorded is set as a recordable area, so that a recording medium can be recorded. It is an object of the present invention to provide an information recording / reproducing apparatus capable of improving the use efficiency of the information.

[0007]

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to the present invention records data compressed on a time axis at a predetermined compression rate as a plurality of individually completed data groups. An optical pickup for reading data and information from a recording medium having a program area to be written and a writing area where a user can arbitrarily write information, and recording the data and information on the recording medium In an information recording / reproducing apparatus comprising 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 recorded on the recording medium is provided. Instruction means for manually instructing the erasure of the data group in question manually, and erasing of the data group is instructed by the instruction means by the control 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 according to this reading order. In the meantime, while recording the above reading order in the writing area of the recording medium,
A program area in which a data group instructed to be erased is recorded is set as a recordable area.

[0008]

According to the above construction, the erasure of the data group recorded on the recording medium is manually arbitrarily instructed by the instruction means, and when the erasure of the data group is instructed by the instruction means, the erasure instruction is issued. The reading order of the remaining data groups excluding the data group instructed to be erased is set so that the set data group is not read, and the control unit performs the above reading so that the data groups are read in the set reading order. Are recorded in the write area of the recording medium. The program area in which the data group instructed to be erased by the control means is recorded is defined as a recordable area.

Thus, the program area in which the data group instructed to be erased is recorded becomes the recordable area, so that the use efficiency of the recording medium can be improved. Further, when erasure of the data group recorded on the recording medium is instructed, reading of the remaining data group excluding the data group instructed to be erased is performed so that the data group instructed to be erased is not read. The order can be automatically set and recorded in the writing area of the recording medium. Therefore, the operability of the information recording / reproducing device is improved.

[0010]

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

A magneto-optical disk device as an information recording / reproducing device according to the present embodiment digitizes and records analog information such as audio data recorded on the magneto-optical disk, and a user can write on the magneto-optical disk. 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, a data decompression / 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 includes a system controller 12, a power supply circuit 13, a head driving device 14, a recording head 15, and an input device 16.

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. The RF signal 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. Further, the RF amplifier 2 generates a servo control signal such as a focus error signal and a tracking error signal from the RF signal, and sends it 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 able to communicate with a system controller 12 for processing subcodes and the like, and demodulates an RF signal passed through an RF amplifier 2. The digital information is converted into digital information, 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 write operation and the read operation of the shock proof memory 5 are controlled in accordance with an instruction from the system controller 12 so that the digital information that has passed through 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 decompression / compression circuit 6. I have.

The shockproof memory 5 temporarily stores digital information output from the signal processing circuit 3, and is, for example, a 1-Mbit DRAM (Dynami).
Semiconductor memory such as c Random Access Memory) is suitable. The shock proof memory 5 includes a signal processing circuit 3
And the data decompression / compression circuit 6 for protecting digital information to prevent interruption of recording / reproduction due to disturbances such as vibrations, and digital information output from the signal processing circuit 3. Is provided for the purpose of absorbing a difference between the transfer speed of the digital information input to the data decompression / compression circuit 6 and the transfer speed of the digital information.

The data expansion / compression circuit 6 expands the digital information output from the memory controller 4 and time-axis-compressed at a predetermined compression rate in the time axis, and outputs the digital /
The data is transferred to the A-converter 7a, where it is reproduced to the original analog information and then output to the output terminal 18. Output terminal 18
Are connected to an output unit (not shown) having a speaker or 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 power to the feed motor 8, the spindle motor 9, and a driving device (not shown) for driving an objective lens (not shown) of the optical pickup 1 to operate them. I have.

The servo control circuit 11 includes the optical pickup 1
This is a circuit that performs feedback control of each of the above-described devices driven by the driver circuit 10 so that an operation of, for example, causing light emitted from the disk 21 to follow a target recording track of the disk 21 is performed accurately. This servo control circuit 11
In accordance with 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 for centrally managing the signal processing circuit 3, the memory controller 4, the servo control circuit 11, and the head driving 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, the input device 16 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 on the disk 21 are processed based on the processing operation input from the input device 16.
In addition to controlling the circuit, the address data in the write 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, the 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.
Reference numeral 9 is connected to an input unit (not shown) having a microphone and the like. The A / D converter 7b converts analog information input from the input terminal 19 into digital information and transfers the digital information to the data decompression / compression circuit 6. Has become. The data expansion / compression circuit 6 sets 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 is transferred to the memory controller 4. The memory controller 4 transfers the digital information output from the data decompression / compression circuit 6 to the shockproof memory 5 and transfers the digital information output from the shockproof memory 5 to the signal processing circuit 3. . Therefore, the shockproof memory 5 is also intended to absorb the difference between the transfer speed of the digital information output from the data decompression / 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 is converted into an RF signal by modulation, and is transferred to the head driving 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 records the RF signal on the target recording track of the disk 21 by the recording head 15 accurately. The recording head 15 is moved in a direction orthogonal to the recording tracks of the disk 21. The recording head 15 records an RF signal in a recording area of the disk 21. The recording head 15 records the reproduction order (read order) of the data group in the write area of the disk 21.

In the above configuration, at the time of reproduction, an RF signal is read from the disk 21 by the optical pickup 1. The RF signal is amplified by the RF amplifier 2, demodulated by the signal processing circuit 3, subjected to predetermined signal processing, restored as digital information, and sent to the memory controller 4. At this time, the digital information is data that has been compressed on the time axis.

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 a control amount according to an instruction of the system controller 12 based on the servo control signal, and outputs a 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. Thereby, the optical pickup 1 is fed 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 and temporarily stored in the shock proof memory 5, and is read out to the memory controller 4 in the order of writing. Then, the digital information output from the memory controller 4 is sent to a data decompression / compression circuit 6, where it is decompressed on a time axis. The digital information that has passed through the data decompression / compression circuit 6 is converted into original analog information by a D / A converter 7a, sent out from an output terminal 18 to an output unit (not shown), and output as, for example, an audio signal.

At the time of recording, analog data is input to an input section (not shown), and is sent to the input terminal 19 as analog information. The analog information is converted into digital information by an A / D converter 7b and then sent to a data decompression / compression circuit 6, where it is time-axis-compressed at a predetermined compression rate, sent to a memory controller 4, and shock-proofed. 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 modulation and predetermined signal processing to perform RF
The recording head 1 is transmitted to the recording head 1 via the head driving device 14.
5 and is recorded in the recording area of the disk 21 by interaction with light from the optical pickup 1.

Next, the disk 21 used in the magneto-optical disk device having the above-described configuration will be described. As shown in FIG. 2, the disk 21 has a lead-in area in which a disk control signal and the like are recorded in order from the inner peripheral side to the outer peripheral side, and the user has information on a plurality of data groups recorded. The user TOC (Ta
ble of Contents) area, a program area for recording a plurality of individually completed data groups, and a lead-out area for recording disk control signals and the like. Then, a recording area is formed by the user TOC area and the program area.

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

In the above-mentioned user TOC area, map numbers (0, 1, 2,...) Are sequentially assigned to the respective areas constituting the user TOC area starting from the inner peripheral side, and the map number 0 is assigned. Areas other than the area that has been set are rewritable. And in the figure, the map number L
In the area to which (where L is a natural number), the number of songs TNO indicating the total number of songs recorded on the disk 21 is recorded, and in the area to which the map number L + 1 is assigned, The start RA1 is recorded. In this start RA1, a map number indicating an area in the program area where address data of the recordable area RA1 in which music can be recorded is written is recorded. If the recordable area RA is divided into two or more places, a start RA2 is recorded in an area to which a map number L + 2 is assigned, and the start RA2 is recorded in the second recordable area. A map number indicating an area where address data of a certain recordable area RA2 is written is recorded.

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

The play track number PNO.1 includes
The address data assigned with the map number N corresponds to the following, and the play track numbers PNO.2 and PNO.
3 and PNO.4 correspond to address data to which map numbers N + 1, N + 2 and N + 3 are assigned in this order. In addition, address data to which a map number N + 4 is assigned corresponds to the start RA1. 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 the play track numbers PNO.2, PNO.3, and PNO.4 are written. “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 configuration, when the magneto-optical disk drive reads, for example, the play track number PNO.1 by the optical pickup 1, it then reads the address data of the map number N and starts the start address (ie, 0) of this address data. ), The reproduction of the first tune is started, and after the reproduction to the end address (that is, 9), the play track number PNO.2 is read, and the reproduction of the second tune is similarly performed. When the reproduction to the end address of the fourth music piece (that is, 39) is completed, the reproduction of the disc 21 ends.

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

First, after turning on a DELETE key (not shown) of the input device 16 to enable inputting, when a manual erasing operation using a keyboard or the like instructs to delete the second tune recorded on the disk 21, The system controller 12 rewrites the user TOC area instead of erasing the second music recorded in the program area of the disk 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 changes the play track number PNO.2 to "3". Rewrite from “N + 1” to “0”.
By rewriting the play track number PNO.2 to "0" in this manner, the second track recorded in the program area is not read out,
The program area where the music is recorded is a 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 +
"1".

Further, as shown in FIG. 3C, in order to make the play track number PNO.n a continuous number, the play track number PNO.
3 to PNO.2, 4th track number PNO.4
Is changed to PNO.3, respectively, and the address data is transferred to an area to which a map number corresponding to these newly set play track numbers PNO.2 and PNO.3 is assigned. Therefore, the disc 21 is set to 1 after the next reproduction.
Each tune is reproduced in the order of the tune → the previous third tune → the previous fourth tune.

In the above description, the case where the tune to be erased is one tune is shown as an example.
It is also possible to instruct erasure of songs or more. Further, the number of music pieces recorded on the disk 21 is not limited to the above-mentioned four music pieces.

As described above, the present magneto-optical disk drive is
When an instruction to delete a song recorded on the disk 21 is given by a manual input operation to the input device 16 composed of switches and keys, the system controller 12 transmits the song to the user TOC area of the disk 21 via the head driving device 14 and the recording head 15. Rewrite the recorded play track number PNO.n and address data. That is, when the above-described erasing operation is performed, the song is read by rewriting the play track number PNO.n of the song designated to be erased to “0” instead of erasing the song recorded in the program area. Not to be. Further, the program area in which the tune instructed to be erased is recorded is recorded in the recordable area R.
A, and the system controller 12 automatically resets the play track number PNO.n so as to be continuous, and stores the reset play track number PNO.n in the user TOC area of the disk 21 via the recording head 15. Write.

Therefore, by setting the program area in which the song designated to be erased is recorded as the recordable area RA, a new song can be recorded in the recordable area RA, and the use efficiency of the recording medium is reduced. improves. Further, since the remaining songs except for the song for which the erasure instruction has been made can be continuously reproduced, the operability of the magneto-optical disk device is improved.

[0039]

As described above, the information recording / reproducing apparatus according to the present invention includes the instruction means for manually instructing the erasure of the data group recorded on the recording medium manually, and the instruction means by the control means. When the data group is instructed to be erased, 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. The above-described reading order is recorded in the writing area of the recording medium so that the data group is read out as described above, and the program area in which the data group instructed to be erased is recorded is set as 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 use efficiency of the recording medium. Further, when erasure of the data group recorded on the recording medium is instructed, reading of the remaining data group excluding the data group instructed to be erased is performed so that the data group instructed to be erased is not read. Since the order can be automatically set and recorded in the writing area of the recording medium, the effect of improving the operability of the information recording / reproducing apparatus is also achieved.

[Brief description of the drawings]

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

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

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

FIG. 4 is an explanatory diagram showing how a user TOC area of a disk is rewritten when a song is erased by the magneto-optical disk device.

FIG. 5 is an explanatory diagram showing how a sub data area of a tape as a recording medium is rewritten when a song is erased by a 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 device, Instruction means) 21 disk (recording medium)

Claims (1)

(57) [Claims] 1. A recording apparatus comprising: a program area for recording time-axis-compressed data at a predetermined compression ratio as a plurality of individually completed data groups; and a write area in which a user can arbitrarily write information. Using a medium, an optical pickup for reading data and information from the recording medium, a recording head for recording data and information on the recording medium, input means for inputting 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, comprising: an instruction means capable of manually instructing erasure of a data group recorded on the recording medium manually; When the control means instructs the erasure of the data group by the instructing means, the erasing instruction is performed 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 group is 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.