JP2901440B2 - 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 start ID which is a cue signal of the piece of music, or an end signal which indicates the end of all pieces of music, is recorded in a sub data area formed at the beginning of each piece of music. A subcode such as an ID is recorded, and high-speed access to each music is possible.

As shown in FIG. 5A, when a song E is further recorded on a tape on which songs A to D are recorded, for example, the above DAT is first used as shown in FIG. As shown, a song E is recorded after the song D in the main data area. Next, the sub-data area formed after the song D, that is, the sub-data area formed at the beginning of the song E
The end ID written in the area is transferred to the sub-data area formed after the song E, and the start ID of the song E is recorded in the sub-data area formed at the beginning of the song E. ing. This makes DAT
Means that at the time of reproducing the tape, the respective songs are reproduced in the order of song A → song B → song C → song D → song E. Since no recordable area is formed between the songs A to D, the above D
The AT cannot record a song E inserted between a song B and a song C, for example.

[0004]

However, the DAT, which is the conventional information recording / reproducing apparatus, records a song E after a song A to a song D already recorded, and a song A → a song B → a song C. Each song is reproduced in the order of → Song D → Song E. Therefore, for example, in order to reproduce each song in the order of song A → song B → song E → song C → song D, the power of the apparatus is turned on or every time a tape is attached to the apparatus To
For example, there is an inconvenience that the user of the apparatus has to reset the reproduction order of each music by manual operation each time.

[0005]

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 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, the recording head, and the input means. In addition to providing instruction means for manually instructing the order of writing a group and the order of reading a plurality of data groups recorded on a recording medium, When the writing of the data group is instructed by the instructing means, the data group instructed to write is recorded in the program area of the recording medium, and the data group is read in the reading order instructed by the instructing means. As described above, the reading order is recorded in the writing area of the recording medium.

[0006]

According to the above arrangement, the order of writing the data group to the recording medium and the order of reading the plurality of data groups recorded on the recording medium are manually and arbitrarily designated by the instruction means. When the writing of a group is instructed, the data group instructed to be written is recorded in the program area of the recording medium, while the data group is read out according to the reading order instructed by the instructing means. Are recorded in the write area of the recording medium.

Thus, in the recording medium in which the data group is newly written, the information is recorded on the recording medium every time the information recording / reproducing apparatus is turned on or the recording medium is mounted on the information recording / reproducing apparatus. This eliminates the need to reset the reading order of the plurality of data groups, thereby improving the operability of the information recording / reproducing apparatus.

[0008]

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 a 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.

[0010] The reproducing operation will be described. The optical pickup 1 is a reproducing head that 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.

A 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 converts the digital information into a D / D signal.
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 a switch is turned on to enable input, a plurality of inputs to the disk 21 are performed by a manual input operation using a keyboard or the like. Processing such as writing of digital information (hereinafter referred to as a data group) of the disk 2
The reproduction order (readout order) of a plurality of data groups recorded in the unit 1 is input to the system controller 12. Then, the system controller 12 controls the above devices and circuits so that a plurality of data groups recorded on the disk 21 are processed and reproduced based on the processing operation and the reproduction order input from the input device 16. At the same time, the address data in the write area of the disk 21 is rewritten via the head drive device 14 and the recording head 15 as described later.

The power supply circuit 13 includes the optical pickup 1 and 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 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 a 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 to the shock proof memory 5 and temporarily stored, 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 unit (not shown) and 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 "music programs"). ) Are recorded. In the following description, a case in which five 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 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.

In the area to which map numbers M to M + 4 (where M is a natural number) are assigned, play track numbers PNO.1 to PNO.5 are recorded. In these play track numbers PNO.1 to PNO.5, 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 + 5 (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, fourth, and fifth songs are (1)
0, 19), (20, 29), (30, 39), (4
0,49). In the area to which the map number N + 5 is assigned, a value (50,999) 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 to which the map number N is assigned corresponds, and similarly, the play track numbers PNO.2 and PNO.
3, PNO.4 and PNO.5 have map numbers N + 1, N + 2, N +
The address data to which 3, N + 4 are assigned correspond in this order. In addition, the start RA1 includes the map number N
Address data to which +5 is assigned corresponds. Therefore, in the example shown in FIG. 3, “N +
"5", "N" is written in the play track number PNO.1, and the play track number PNO.2, PN
O.3, PNO.4 and PNO.5 have “N + 1”, “N + 2”, “N
+3 "and" N + 4 "are written in this order.

In the above configuration, when the optical pickup 1 reads, for example, 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 (ie, 0) of this address data is read. ), 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 fifth music piece (that is, 49) is completed, the reproduction of the disk 21 ends.

Next, the operation of writing music to the disk 21 in the magneto-optical disk device, that is, the operation of adding music will be described. In the following description, as shown in FIG. 4A, the first tune is stored at addresses 0 to 9 in the program area.
2nd song at address 10-19, 3 at address 20-29
A fourth piece of music is recorded at addresses 30 to 39, and one new piece of music is added to the disc 21 having the recordable area RA1 at addresses 40 to 999, and the additional music is reproduced so as to be reproduced third. An example of setting the order will be described.

First, after turning on an INSERT key (not shown) of the input device 16 to enable inputting, a manual input operation using a keyboard or the like is performed to instruct addition of a song to the disc 21 and a reproduction order of the additional song. , The system controller 12 transfers the additional music input from the input terminal 19 via the data decompression / compression circuit 6 and the like to the head driving device 14.
Then, the data is recorded in the recordable area RA1 formed behind the fourth music piece in the program area of the disk 21 via the recording head 15, and the address data of the additional music piece is written in the user TOC area.

That is, as shown in FIG. 2B, the system controller 12 changes the number of songs TNO recorded in the user TOC area from "4" to "5", and when the number is changed to "5" in the program area. The play track number PNO.5 of the additional tune as the tune is rewritten from "0" to "N + 4", and the start RA1 is rewritten from "N + 4" to "N + 5". If the address of the additional music in the program area is, for example, 40 to 49, the address data assigned with the map number N + 4 is rewritten to (40, 49), while the map number N + 5 is assigned. (50, 999) is written to the address data set. In this way, the play track number PNO.5 is changed to "N + 4" and the map number
Address data to which N + 4 is assigned is (40, 49)
At the time when the additional music is recorded in the program area, the disc 21 has the first music → 2
Each tune is reproduced in the order of tune → third tune → fourth tune → additional tune.

Subsequently, since the reproduction order is instructed by a manual input operation using a keyboard or the like so that the additional music is reproduced third, the system controller 12
The user TOC area is rewritten based on the above instruction.

That is, as shown in FIG. 3C, the map number corresponding to the play track number PNO.n is rewritten so that the additional music is reproduced third. Specifically, the play track number PNO. 3 is changed from “N + 2” to “N + 4”, and the play track number PNO.
+3 ”to“ N + 2 ”, the play track number PNO.
5 is rewritten from “N + 4” to “N + 3”.
That is, the disc 21 has the play track number PNO.
When 3 is read, the address data of the map number N + 4 is read, and the reproduction of the additional music starts. Similarly, when the play track number PNO.4 is read, the address data of the map number N + 2 is read, and the reproduction of the previous third music is started, and the play track number PNO.5 and the map number N + 3 are read. Is read, the reproduction of the previous fourth tune is performed. Accordingly, from the next reproduction, each music is reproduced in the order of the first music, the second music, the additional music, the previous third music, and the previous fourth music.

In the above description, the case where the number of songs to be written is one is shown as an example. However, the number of songs to be written is not limited to one, and two or more songs are written at one time. It is also possible to instruct. Further, the number of music pieces recorded on the disk 21 is not limited to the above-mentioned four music pieces. Further, the playback order of the written music is not limited to the above example, and a desired playback order can be set.

As described above, the present magneto-optical disk drive is
Writing music to the disc 21 by manual input operation to the input device 16 composed of switches and keys, and
When the reproduction order of each music recorded on the disk 21 is instructed, the system controller 12
In addition to recording the tune instructed to be written in the program area of the disk 21 via the recording head 15, the play track number recorded in the user TOC area
Rewrite PNO.n and address data.

Therefore, since the reproduction order of each music is recorded on the disk 21, for example, the power supply of the magneto-optical disk device is turned off.
Even if the flip-flop is performed or the disk 21 is removed from the magneto-optical disk device, the reproduction order of the designated songs is not erased. That is, even at the time of the next reproduction, each music is reproduced on the disk 21 in the reproduction order instructed last time. This eliminates the need to turn on the power of the magneto-optical disk device or to set the reproduction order of each music recorded on the disk 21 each time the disk 21 is mounted on the magneto-optical disk device. The operability of the device is improved.

[0038]

As described above, the information recording / reproducing apparatus of the present invention can manually arbitrarily designate the order of writing data groups on a recording medium and the order of reading a plurality of data groups recorded on the recording medium. When the data group writing is instructed by the control means by the control means, the data group instructed to be written is recorded in the program area of the recording medium, while the instruction means is provided by the control means. The reading order is recorded in the writing area of the recording medium so that the data group is read out in the reading order.

Thus, in the recording medium in which the data group is newly written, for example, every time the power of the information recording / reproducing apparatus is turned on or the recording medium is mounted on the information recording / reproducing apparatus, the data is recorded on the recording medium. This eliminates the need to reset the reading order of the plurality of data groups, and improves the operability of the information recording / reproducing apparatus.

[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 added by the above-described 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 added 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, wherein the writing of a data group to the recording medium and the reading order of a plurality of data groups recorded on the recording medium are manually performed. In addition to the instructing means that can be arbitrarily instructed in the above, when the writing of the data group is instructed by the instructing means by the control means The data group instructed to be written is recorded in the program area of the recording medium, 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 instructed by the instruction means. An information recording / reproducing apparatus characterized by the above-mentioned.