JP3476738B2 - Information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
For recording media such as impact disks, digital
Information recording / reproducing devices that can record audio signals at any time.
Is what you do. [0002] 2. Description of the Related Art Conventionally, continuous information (analysis) such as music information has been conventionally used.
Log data) by optically detectable minute pits
A so-called compact disc recorded digitally
(Hereinafter referred to as CD) is widely used. Recorded on CD
The read digital information can be read from the optical disk
(CD player). FIGS. 14 and 15 show the standard for CD.
1 shows an outline of a simplified signal format. FIG.
As shown in the figure, one frame 101a of the recording signal
Frame synchronization signal 101b indicating the beginning of the
And the sub-code 101c constituting the additional information of
An 8-byte error detection and correction
Data field 101d to which the
Is configured. The configuration of the data field 101d
The CIRC (Cross Interleaved Reed Solomon Cod
Error e) combined with incomplete interleaving called
-A detection and correction method is used. As shown in FIG. 15, 98 frames
Constitute one sector 102a. Sector 102
In the sub-coding frame 102c of a, one sector
And additional information forming a unit. Sabiko
The loading frame 102c has a track number (main information
If the information is music information, it is called a song number)
Provides absolute address information indicating the recording / playback position above
You. The length of one sector 102a (hereinafter referred to as the sector length)
Is 1/75 second in the case of a CD.
Thus, information for 75 sectors is reproduced per second. Sec
The data number is [minute: second: frame information (75 base)]
Time information that is gradually increased from the innermost circumference of the disc
And location information. Further, the data field of the sector 102a is
Mode 102d is 98 times the information amount of one frame, that is,
2352 bytes of main data and 784 bytes of parity
And a symbol. Main data is audio information
In the case of the CD standard, the sampling frequency is 44.1 kHz,
Quantization is a 16-bit straight line, and the number of channels is 2 (stereo
E). Therefore, the number of data per second
Is 44.1 kHz x 16 x 2 = 1.4112 Mbits = 17
6.4k bytes And the number of data per sector is 176.4k bytes / 75 = 2352 bytes , Which coincides with the above-described assignment of the main data. [0007] As shown in FIG.
Information recording area 100c and TOC (T-able of Contents)
And an area 100b. Main information recording area 100c
The main information such as music information and the above sub-code
The sector number is recorded. TOC area 100b
Contains the main information recorded in the main information recording area 100c.
Additional information is recorded. This additional information
, The track number, the recording start sector number of each track,
And the main information recorded on one track is audio
Information that identifies whether it is information or computer data
Etc. are included. [0008] CD 100a having the above format
Is loaded in the CD player, first, the TOC area 1
00b is read out. This allows the recorded
Number of recorded main information (for example, the number of songs) and start recording of each main information
The sector number and the type of information content are recognized. Play instruction
When there is, the recognized additional information and the main information recording area 100
c is compared with the sector number obtained from the subcode
Access and playback operations to the desired track
It is executed promptly. [0009] CD recording is performed at a constant linear velocity, so-called CL.
V (Constant Linear Velocity) method
Therefore, the recording density is constant at any position on the CD.
The capacity has been improved. In an actual CD player,
Recorded in CLV format according to the above signal format.
Reproduction signal obtained from a recorded CD, for example, a frame synchronization signal
The rotation of the CD should be the same as the linear velocity so that the interval between signals is the reference length.
It is controlled constantly. On the other hand, a magneto-optical device, which has been developed in recent years,
For rewritable discs such as discs, music information and
When recording and reproducing various information such as computer data,
Uses a common playback method with conventional CDs for compatibility
It is desirable to provide a disk recording / reproducing apparatus which can be used. This
In the case of
The absolute address information using the above subcode,
There is no frame synchronization signal used for CLV control
Access operation to the recording start sector position,
Necessary CLV control cannot be performed during recording. Therefore, an absolute address using a subcode
Absolute address information equivalent to the information
To modulate the absolute address information with biphase mark modulation,
Depending on whether the modulation data is “1” or “0”,
Change the shape of the guide groove to be formed in the width direction (for example,
For example, meandering in the radial direction or changing the width itself.
(Japanese Patent Laid-Open No. 64-396).
No. 32). In this case, bi-phase mark modulation
The frequency band of the absolute address information and EFM (Eight to F
ourteen Modulation) Frequency band of recording information by modulation
If you make them different, you can reproduce them separately
it can. Therefore, even for unrecorded areas,
The absolute address information recorded by the change in the shape of the inner groove
Used to access a desired location on the disc. Ma
In addition, using the reproduction carrier component of the absolute address information
This enables accurate CL at both recording and playback.
V control can be performed. [0013] However, the above rewriting
Disc recording / reproducing devices that use removable discs
Compact, a common consumer information recording and playback device
As with a tape recorder that uses a cassette or the like,
During recording, only recording can be performed, and only during playback
I can't. That is, the function of the conventional disk recording / reproducing device
Is dedicated to recording or playback only during its operation
Is equivalent to the function of a single processing unit. For this reason, recording
You can perform simultaneous playback for another purpose during
It is not possible to perform simultaneous recording for the purpose of
Has problems. To solve this problem, for example, a plurality of musical instruments are used.
Apply this when recording and editing performance details for each instrument.
explain. First, a single instrument is played and recorded.
Play the recording and listen to it while playing another instrument.
If you try to record more than once, conventionally,
A raw device and a plurality of recording media were required. As a result,
In addition to the increased location and cost of collecting equipment, multiple records
Editing because the playback device must be operated simultaneously
The operability of the equipment becomes extremely poor. Of course, many recording / reproducing apparatuses for business use include:
It has a number of recording channels and each channel is recorded independently.
Multi-track recorders that can perform recording and playback
Existing. However, such recording / reproducing devices are often
Requires very expensive and complicated operation because of its function
Cannot be used easily for consumer use.
No. [0016] In addition, it has been widely used in households for consumer use.
Reproduced by a so-called "karaoke" device
If you want to mix and record a song along with the accompaniment,
Recording medium and reproduction apparatus for accompaniment reproduction
And the recording medium and recording device for mixing recording
I have to prepare them. In addition, two devices at the same time
There is the inconvenience of having to operate. Moreover,
The recording medium for accompaniment and the recording medium for recording
This makes the storage of the recording medium complicated. To cope with these problems, the present invention
The authors reported that the recording processing system in the recording and
And a buffer memory in the middle of the playback processing system, respectively.
Consider a recording and playback device that can perform playback simultaneously with recording.
(Filed by the applicant on November 28, 1991
See). In this device, the data for each buffer memory is
Data writing speed and data reading speed
Alternate recording and playback operations for different parts above
To allow simultaneous processing of recording and playback.
You. However, this recording / reproducing device still has
Problems remain. That is, in a CD or the like, information that can be recorded and reproduced is
In order to get as much information as possible,
Make the record length of the report constant regardless of the inner or outer circumference
I have. For this reason, when recording / reproducing on the inner peripheral portion of the CD,
Increases the rotation speed, and rotates during recording / reproduction on the outer periphery.
The CLV control method for lowering the speed is adopted. Then, as described above, different parts
Recording while alternately repeating playback and recording.
When performing simultaneous playback processing, the processing unit
Positions must be as close as possible to each other
Be restricted. Because the processing parts are separated
, Even if the optical head can move at high speed,
The number of rotations of the motor that rotates D
Because more time is spent before turning to turns.
You. Therefore, the time required for changing the rotation speed becomes longer.
Depending on the condition, i.e.,
When the required capacity of memory increases
Problems arise. [0020] In view of the above problems, an object of the present invention is to provide:
The same recording / reproducing
Information recording / reproducing device that can perform time processing at high speed
To provide. [0021] SUMMARY OF THE INVENTION According to the present invention, the position information is a line.
Disc recorded on the entire surface in advance with constant speed control
An information recording / reproducing apparatus using a recording medium in a shape of
Information is stored at a first radial position and a second radial position on a recording medium.
Recording / reproducing means for recording / reproducing, and positional information on the recording medium
Detecting means for detecting information, and positional information of the first radial position.
From the report, the rotation speed of the recording mediumBased on constant linear velocity control
Rotation speedConfigurationDoRotation speed control means;
A record for temporarily storing information to be recorded and reproduced at a second radial position.
Storage means and a transfer rate of information stored in the storage means.
Correction means to correctAnd the first radial position
If recording or playback is performed only for
The number-of-turns control means maintains the number of rotations, and the first and second
When recording / reproducing at the same time to the radial position,
Rotation speed control means for transmitting information to the second radial position;
During recording and reproduction, the rotation speed is maintained, and the correction
The step is the information of the second radial position stored in the storage means.
Data transfer based on the constant linear speed control method
The position information of the second radial position is always equal to the speed.
Correction based on informationIt is characterized by doing. [0022] DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
The following is a description based on FIG. 12.
You. First, an information recording / reproducing apparatus according to the present invention is used.
The configuration of the disk that is used will be described. As shown in FIG.
The disc 1 has a lead-in section on the inner periphery, that is, a TOC area.
Area 1a, a lead-out part 1b on the outer peripheral part, an intermediate part thereof
Has a recording area 1c. TOC area 1a and
Various information about the disc 1 is stored in the readout section 1b.
The main information used by the user is recorded in the recording area 1c.
Is recorded. Some or all of the main information is
May be recorded in advance by the provider. As shown in FIG.
The absolute address that provides the raw location information can be
Guide groove formed on the disk 1 in the radial direction with a predetermined frequency signal
Meandering slightly (so-called wobbling)
Is recorded as pre-recorded information when the disc 1 is manufactured.
Has been recorded. The predetermined frequency signal is, for example, an absolute
It supports bi-phase mark modulation data of the address.
You. Note that the absolute address in this embodiment is
Location, so it is sometimes called a sector address.
it can. FIG. 4 shows 2352 bytes included in one sector.
Shows the format of the main data part of the
You. The main data field 103a identifies the beginning of a sector.
A sector synchronization signal 103b for identifying
Sector address 103c indicating the location and user data 10
3d. Main data field 103
For the byte allocation of a, read the CD-ROM (Read Only
Memory), the sector synchronization signal 103b becomes
12 bytes, sector address 103c is 4 bytes (CD
-Called a header in ROM), user data 1
03d has 2336 bytes. FIG. 5 is a diagram showing a method for rewriting information.
4 shows a format of a block structure to be adopted.
The block 104a, which is the minimum unit of the recording / reproducing process, contains information.
As a result of the information compression process, the sector 104a₀Or 1
04a₁₄Of 15 sectors in total. this
Of which, sector 104a₀・ 104a₁And sector 104a
₁₃・ 104a₁₄Is used to rewrite in block units.
This is a necessary additional sector. There are several reasons why an additional sector is required.
You. For example, using the signal format of the CD standard,
If you try to rewrite the desired sector, the
Later, data that has no context with newly recorded data
At the beginning and end of the rewrite,
Many data errors occur. Incomplete type by CIRC
To achieve the original correction capability of interleaving, 105
Requires the code propagation length of the frame. Therefore, 98
Before and after a sector composed of frames, 105/98 = 1.
07 sectors, that is, two sectors must be added. Ma
In addition, the leading additional sector is a PLL from the rewriting start point.
It is also necessary as a pull-in area. Therefore, the sector 104a_TwoOr 10
4a₁₂Data blocks 105 are composed of 11 sectors
However, the data amount included in the data block 105 is 23
36 × 11 ≒ 25.7 bytes ≒ 206 k bits. Next, an information recording / reproducing apparatus according to the present invention will be described.
A configuration example will be described. As shown in FIG. 1, the information of the present embodiment
The recording / reproducing apparatus performs so-called magnetic field modulation type magneto-optical recording.
New information on top of the recorded information
You can do overwriting to overwrite information
It is configured as follows. Therefore, during recording and playback
And an optical head 3 for irradiating the disk 1 with laser light.
The coil 24 that applies the modulation magnetic field to the disk 1 during recording
Provided. The disk 1 is a spindle motor.
Is driven to rotate. An input terminal 18 of the recording system receives an analog signal.
Connected to A / D converter 19 for converting to digital signal
The output of the A / D converter 19 is a predetermined algorithm.
Information compression processing circuit 20 for compressing digital signals with
It is connected to the. The information compression processing circuit 20 is
Controller 10 and a sector address from the controller 10.
Receive The output of the information compression processing circuit 20
A buffer memory 21 that temporarily holds data in block units
Record data processing to perform predetermined signal processing such as modulation via
It is connected to a circuit 22. Of the recording data processing circuit 22
The output is high to the coil 24 via the buffer memory 25.
Connected to a coil driver 23 for generating a fast reversing magnetic field.
ing. The buffer memory 21 and the buffer
The memory 25 is connected to the controller 10 and controls each output.
The timing of the force is controlled. In the reproducing system, the output of the optical head 3 is
Connected to the loop 5. On the other hand, the output of the reproduction amplifier 5
Is a predetermined signal processing such as demodulation through the buffer memory 26.
Connected to a reproduction data processing circuit 9 for processing
For example, a bandpass filter and a PLL (Phase Locked Loop)
Connected to the prerecorded information detection circuit 6 composed of
You. The output of the reproduction data processing circuit 9 is
Decompression processing corresponding to the above-described compression processing via the memory 14
Information decompression circuit to obtain original digital signal
15. Output of information decompression processing circuit 15
Is a D / A converter that converts digital signals to analog signals.
Connected to the output terminal 17 via the inverter 16.
You. The buffer memory 26 and the buffer memory 1
4 is connected to the controller 10, and each output tie
Is controlled. Also, the reproduction data processing circuit 9 and
And the information decompression circuit 15 are also connected to the controller 10.
And information necessary for the controller 10 as described later.
Send. The prerecorded information detection circuit 6 outputs
CLV control in which force controls the rotation of spindle motor 4
Connected to the circuit 7 and to the absolute address detection circuit 8
It is connected. Note that the absolute address detection circuit 8
From the phase mark demodulation circuit and address decoder
Made up of As a result, the CLV control circuit 7
Clock signal required for CLV control from recording information detection circuit 6
And the absolute address detection circuit 8 outputs the absolute address
(Ie, sector address)
Send to La10. The operation unit 13 outputs the output of the controller 1
0, and the controller 10
Give a sign. The display unit 12 is connected to the controller 10.
Display the song number and time information related to recording and playback.
You. In the above configuration, the basic information recording operation
The operation will be described below.
Audio information is 44.1kHz sampling frequency, 16 quantities
Digitize by A / D converter under the condition of
Is converted to audio information. The data per second
The number of data is 44.
1 kHz × 16b × 2 = 1.4112 Mbps. As shown in FIG.
The audio information is compressed by the information compression processing circuit 20.
Audio block sequence Ba before₀, Ba₁, Ba_Two…
... Each audio block has a delay of about 0.8 seconds.
The audio information is included, and the amount of information is 1.4112 Mbps x 0.8 seconds = 1.1896 Mbps =
141.12k bytes It has become. The information compression processing circuit 20 includes the above-described digital
From audio information, 128 kb per channel
ps, compression compressed to 256 kbps in 2 channels
Generate audio information. That is, the obtained information pressure
The reduction ratio is 256k / 1.41M ≒ 1 / 5.5. information
For specific compression methods, see “Sound Code
Algorithms and Standardization Trends "(Shinji Hayashi, IEICE
, Vol.89, No.434, pp.17-22) etc.
ing. Here, it is not necessary to limit the method of information compression.
Therefore, the description is omitted. Therefore, the information compression processing circuit 20
Per block, 141.12 kbytes / 5.5 ≒ 25.66 kbytes Generate compressed audio information. Furthermore, information compression processing
The processing circuit 20 adds the above-described section to the compressed audio information.
Data synchronization signal (12 bytes x 15 sectors) and control
Address (4 bytes x 15)
Sector) and additional sector (2336 bytes x 4)
Add. Therefore, as shown in FIG.
Compressed audio block generated by the compression processing circuit 20
Cook Bb₀, Bb₁, Bb_Two……, respectively, 25.66k + (12 × 15) + (4 × 15) + (23
36 × 4) ≒ 35.2k Byte amount. Compressed audio block Bb₀, Bb₁, B
b_Two... is the audio block Ba₀, Ba₁, Ba_Two…
Is slightly delayed from the time tw0 when the supply of ... is started.
Accordingly, the buffer memory 2 starts from the time tw1.
1 is sequentially written. Writing to buffer memory 21
The transfer speed is 35.2 kbytes x 8b / 0.8 seconds @ 352.4 kbps It has become. On the other hand, the data written to the buffer memory 21
Compressed audio block Bb₀, Bb₁, Bb_Two......
As shown in FIG. 6C, each writing is completed.
Each time, it is sequentially read out according to the instruction of the controller 10,
The data is sent to the recording data processing circuit 22. For example, compress
Dioblock Bb₀Is written at time tw2
Read as soon as completed, compressed audio block
Bb₁Is the same as when writing is completed at time tw4.
Is read out. Note that reading from the buffer memory 21 is performed.
Speed (that is, corresponding to the transfer speed of audio information)
Is 1.41 Mbps which is the same as the conventional CD,
Compare with the writing speed to the buffer memory 21 described above.
When, 1.41Mbps / 352.4kbps ≒ 4 times It has become. Compressed audio recorded on disc 1
Offlock Bb₀, Bb₁, Bb_Two... is 15 sectors each
And the sector length is 1/75 second as described above.
Therefore, each compressed audio block has 1/75 sec x 15 = 0.2 sec Contains compressed audio information. Therefore,
Audio block Ba before information compression₀, Ba₁, Ba_Two…
Compared to the occupation time of 0.8 seconds, 0.8 / 0.2 = 4 times Thus, it can be seen that they are equal to the transfer speed ratio. As described above, the recording data processing circuit 22
Processing operation when the buffer memory 21 is not provided
In comparison, it is implemented in 1/4 of the time, and the remaining 3/4 of the time
Is waiting. More specifically, the recording data processing circuit 22
Is the compressed audio supplied from the buffer memory 21
Block Bb₀, Bb₁, Bb_Two…… against the CIRC
And generation and addition of parity for error detection and correction. Sa
Further, the subcode information is provided from the controller 10 for each sector.
After EFM modulation, the frame synchronization signal
The number is added and transferred to the buffer memory 25. Reading speed from buffer memory 25
According to the recording part according to the instruction of the controller 10
Change. For example, for different parts on the disc 1
When processing recording and playback simultaneously, keep the linear velocity constant.
To rotate the spindle motor 4 at the recording site
Number must be half of the number of revolutions at the regeneration site.
I do not. At this time, reading from the buffer memory 25 is performed.
Double the writing speed to the writing speed to the buffer memory 25
If the speed is high, the rotation speed at the regenerating part remains the same,
Normal recording can be performed. Therefore, the reading from the buffer memory 25 is performed.
Just change the ejection speed according to the recording area,
Without changing the rotation speed of the
1. Simultaneous processing of recording and reproduction for any different part on
It becomes possible. Controller for buffer memory 25
For details of the control method 10, see the buffer system of the reproduction system described later.
Replaced by the description of the control method for the moly 26
And Compressed audio block Bb₀, Bb₁, B
b_Two...... indicates the timing required for the recording part as described above
Supplied from the buffer memory 25 to the coil driver 23.
It is. The coil driver 23 is based on the supplied signal.
To drive the coil 24, and at the same time,
By irradiating the disk 1 with laser light, a signal is recorded.
Recording is performed. Next, a basic information reproducing operation will be described.
The reproduction signal output from the optical head 3 is amplified by the reproduction amplifier 5
After being written to the buffer memory 26,
The data is read out by the
It is. Note that writing / reading to / from the buffer memory 26 is performed.
The delivery control will be described later. Reproduction data processing circuit 9
Is the binarized magneto-optical signal Ps included in the reproduction signal
After the EFM demodulation, the sub-
The code information is separated and sent to the controller 10. Error detection
Error detection and correction by CIRC using parity for output correction
The correction is also performed by the reproduction data processing circuit 9. As shown in FIG. 7A, the reproduction data processing
The reproduced data having the error corrected by the circuit 9 is compressed
Dioblock Bb₀, Bb₁, Bb_Two... once as ba
The data is written to the buffer memory 14. At this time, the buffer
The memory capacity of the memory 14 corresponds to, for example, four blocks.
If so, during the time period from tr0 to tr3, four compressions are performed.
Audio block Bb₀~ Bb_ThreeIs written, then
Is temporarily suspended. Writing to buffer memory 14
The speed is 1.41 Mbps, corresponding to the above recording.
It has become. Further, as shown in FIG.
Dioblock Bb₀Of the time tr1 when the writing of
At this point, the compressed audio block Bb₀Readout is open
The transfer to the information decompression processing circuit 15 is started.
This reading speed is set to 35
It is 2.4 kbps. Compressed audio block
Bb₀When reading of data is completed at time tr4,
Since a space for one block is generated in the buffer memory 14,
Next compressed audio block Bb_FourIs written,
It will be in a standby state again. The information decompression processing circuit 15 receives the transferred compression
Audio block Bb₀Extract sector address information from
And supplies the compressed audio
Decompression processing (however, the compression processing
Process). Then, as shown in FIG.
Audio block Ba after long₀Is young from time tr1
D / A from time tr2 with time delay
Output to converter 16. Thus, one block is stored in the buffer memory 14.
Intermittently compresses disk 1 every time there is space
Read audio block and store it in buffer memory 14
By successively replenishing, the output terminal 17
Log audio information is continuously extracted. On the other hand, in the prerecorded information detecting circuit 6,
The band-pass filter is based on the output of the reproduction amplifier 5 as described above.
Extracts prerecorded information and uses the clock synchronized with the prerecorded information.
A lock signal is generated by the PLL. CLV control circuit 7
Is the clock signal and the base supplied from the controller 10.
Compare to the quasi-frequency signal and spin based on the difference signal
An accurate rotation control of the dollar motor 4 is performed. Also, absolute ad
Circuit 8 detects the pre-recorded information as a bi-phase mark.
After demodulating and decoding to an absolute address,
It is supplied to the roller 10. The controller 10 detects the absolute address.
The absolute address sent from the path 8 (that is, the sector address)
On the disk 1 of the optical head 3 based on
While recognizing the position, an optical head moving mechanism (not shown)
By controlling, the optical head 3 is moved to a desired position. Ma
Further, the controller 10 transmits the data from the reproduction data processing circuit 9.
Recognizes the subcode information
When the code information is the recorded content of the TOC area 1a
Is stored in the TOC memory 11 as management information, and
The management information is read from the TOC memory 11 according to. Sa
In addition, the controller 10 performs information compression during recording.
Sector address corresponding to the absolute address to the processing circuit 20
And provide absolute information about the recorded main information.
The address is stored in the TOC memory 11. TOC memo
The contents of the file 11 are recorded as subcode information as necessary
By being supplied to the data processing circuit 22, the TOC area
Management information registration for the area 1a is performed. Here, the operation of the buffer memory 26 and
And write / read control for buffer memory 26
explain about. First, the disc 1 is provided with two types of first and second
Audio information is recorded, and as shown in FIG.
1 audio information is stored in the second area R1 on the inner peripheral side.
It is assumed that the information is recorded in the outer region R2. Ma
When the optical head 3 is reproducing the area R2, the
It is assumed that the controlled rotation speed of the disk 1 is N1. At this time, as shown in FIG.
The information bit 31 on the disk 1
On the other hand, the prescribed bit length n based on CLV control₁, N_Two, N
_Three.. And temporarily stored in the buffer memory 26.
It is. Note that the horizontal axis in FIGS. 9A and 9B is time for convenience.
Assume that it corresponds to the axis. The controller 10 has an absolute address
The output of the detection circuit 8 is constantly monitored,
The rotation speed is equal to the specified rotation speed corresponding to the position of the optical head 3.
Constant frequency of the absolute address carrier signal
fR is detected. Therefore, as shown in FIG.
As described above, the optical head 3 converts the information bit 31 into a specified bit length.
Absolute address carrier signal frequency during playback
f_nIs a constant frequency f_RIs equal to Next, the optical head 3 is moved to the inner peripheral area R1.
To play the first audio information,
Then, the rotation speed of the disk 1 is set to N1 by CLV control.
Change to a faster N2. However, the disc
When the number of rotations of the spindle motor 4 is changed,
It takes time to reach steady state after the number fluctuates
For any other part on the disc 1, the next recording
Playback processing cannot be performed at high speed. Accordingly, the information recording / reproducing apparatus of the present invention
The number of rotations of the pindle motor 4 before the optical head 3 moves
Different information while maintaining the rotation speed (ie, N1)
Is configured to be able to play or record
I have. As a method of maintaining the rotation speed, for example, maintaining the rotation speed
The reference frequency of the movement destination in the case where the
Is calculated and supplied to the CLV control circuit 7.
it can. At this time, the reference frequency signal is
Determined by the corresponding disk radial position and linear velocity
You. In the case of the above example, to simplify the description,
The same information is recorded as information bit 31 in area R1.
The optical head 3 has the information bits in the region R1.
31 is the number of rotations slower than the specified rotation speed N2 by CLV control.
Reproduction is performed with the number of turns N1. As a result, FIG.
As shown in the figure, the information bit 31 has a specified bit length.
n ₁, N_Two, N_ThreeBit length extended without being reproduced by…
m₁, M_Two, M_ThreePlayed with ... Now, assuming that N2 = 2 × N1, m₁= 2x
n₁, M_Two= 2 × n_Two... That is, on disk 1
Then, even though the information bits 31 are recorded with the same length,
Regardless, since the rotation speed of the disk 1 is slow,
Is input to the buffer memory 26, and
It is stored. Further, as shown in FIG.
The frequency f of the absolute address carrier signal reproduced at 1_m
Is the bit length m₁, M_Two, M_Three...
In response, the constant frequency f_R１ ／ times as large as Therefore, the controller 10 sets the frequency
Number f_mConstant frequency f_RChange to (in this example,
Decrease) is detected. As a result, the controller 10
Clock for reading to be sent to the buffer memory 26
Signal frequency t_XAnd the bit length m extended₁,
m_Two, M_ThreeThe information bit 31 reproduced by ...
G length n₁, N_Two, N_Three... read from the buffer memory 26
To be controlled. In the above example, as shown in Table 1 below,
Frequency f_nIs a constant frequency f_RWhen equal to
To read out from the buffer memory 26
Clock signal frequency t_XTo t₁Then the frequency f_m
Is a constant frequency f_RBuffer memory at 1/2 times
26, the frequency t of the clock signal transmitted to_XIs 2 × t₁
It is said. [0066] [Table 1] Thus, as shown in FIG.
The data processing circuit 9 determines whether the information bit 31 in the area R1 is
Is also reproduced at the original rotation speed N2 by CLV control.
Thus, the prescribed bit length n₁, N_Two, N_ThreeMagneto-optical having ...
An air signal Ps is received. Next, the data is already recorded in the recording area 1c of the disk 1.
At the same time as playing the music information of the first song, the sound of the second song
An example in which music information is recorded immediately after the music information of the first song will be described.
You. For the music information of the first music, the following Table 2
Management information indicated in the TOC area 1a
And That is, the first song is [01:00:01
[04:18:15]
Frame]. During playback
Read out this management information from the TOC area 1a,
It is stored in the OC memory 11. [0070] [Table 2] In FIG. 12, (a), (b) and (c)
Each shows a data sequence related to the playback operation,
(D), (e) and (f) are data related to the recording operation, respectively.
FIG. The information compression processing circuit 2
0 and the processing time delay by the information decompression processing circuit 15 are as follows:
It is omitted for convenience. The buffer memories 14, 2
1 means 5 or less compressed audio blocks
It is assumed that it has a capacity that can store data. A simultaneous recording / playback instruction from the user (ie,
(The first song is played and the second song is recorded immediately after the first song.)
Is given to the controller 10 via the operation unit 13
And the controller 10 is stored in the TOC memory 11.
Recording start sector address [01: 00: 01: 01
Access to the beginning of the first song based on
Do. At this time, the controller 10 controls the reproduction operation.
As the start address Ap, [01: 00: 01: frame
Is set. Next, as shown in FIG.
Compressed audio block PBb₀3 blocks from
Is generated and written to the buffer memory 14. Third
Compressed audio block PBb_TwoWhen writing of data is completed
At time t1, the compressed audio data is
Offlock PBb₀.. Are started (FIG. 12).
(B)).
PBa₀.. Is started (see FIG. 12C).
See). On the other hand, reading from the buffer memory 14
In parallel with the audio information before compression
Block RBa₀Are generated (see FIG. 12D).
), Followed by the compressed audio block RBb₀......
Is written into the buffer memory 21 (see FIG. 12E).
See). Next, the compressed audio block PBb₀~
PBb_TwoHas already been played, so the
The reproduced operation start address Ap is [01:00
01 frame] and 15 × 3 = 45 sectors are added,
[01:00:46 frames] is updated. And
Compressed audio block PBb from buffer memory 14
₀, PBb₁Whether reading of two blocks has been completed
Is determined. This determination is made by the information decompression processing circuit 1
5 is performed based on the sector address recognized. Thereafter, the compressed audio block PBb₁
At the time t2 when data is read from the buffer memory 14.
From the compressed audio block PBb_Three~ PBb₆4 bu
The lock is reproduced and written to the buffer memory 14.
(See FIG. 12 (a)) and the reproduction operation start address.
Ap is 15 × 4 = 6 in [01:00:46 frame].
0 sectors are added and [01: 01: 31: 31]
Be updated. Next, the controller 10 starts recording.
Dress Ar is set as [04:18:16
Frame]. Buffet
Compressed audio block RBb in memory 21₀~ RBb_Threeof
After it is determined whether four blocks have been written,
Compressed audio block RBb_ThreeTime when writing of data was completed
At time t4, the compressed audio data is read from the buffer memory 21.
Block RBb₀~ RBb_ThreeIs read and on disk 1
Is recorded at the corresponding position. Note that the buffer memory 21
The write determination is made by the controller 10 by the information compression processing circuit 2.
0 based on the sector address given sequentially for each sector.
It is done. Subsequently, the recording operation start address Ar is
15 × 4 = 60 sectors in [04:18:16 frame]
Is added and updated to [04:19:01 frame]
You. Next, the reproduction operation start address Ap is set.
Access to the set [01:01:31]
Operation and compression from the buffer memory 14
Audio block PBb_Two~ PBb_FiveFor four blocks
It is determined whether the reading has been completed. Thereafter, a stop instruction is given from the operation unit 12.
Intermittent playback and recording operations as described above until
The playback operation and recording are repeated by
Simultaneous processing of the operation is performed. When a stop instruction is given from the operation unit 12,
Recording start sector corresponding to the recorded music information of the second song
Address and recording end sector address are TOC memory
11 is added. The content stored in the TOC memory 11 is T
After an access operation to the OC area 1a, management information is obtained.
And a series of operations is completed. Note that using the buffer memories 25 and 26
The data transfer speed is corrected and the rotation speed of the disk 1 is changed.
Since no time is needed for updating,
Simultaneous processing of the above recording and playback for different positions
Can be done at high speed. Finally, the recording and reproducing operations are performed using the configuration shown in FIG.
Of optical head 3 and signal processing
The control flow will be described with reference to FIG. Where the record
Ar is the absolute address of the start position₀, Absolute playback start position
Address is Ap₀The optical head 3 first stops recording.
Address Ar₀Shall be accessed. First, steps (hereinafter, referred to as S) 1 and
In step 2, the reproduction start absolute address Ap is sent to the controller 10.
₀And the recording start absolute address Ar₀Is set. S3
And the optical head 3 is at the recording start absolute address Ar₀Move to
You. The controller 10 calculates the recording start absolute address Ar₀
Is supplied to the CLV control circuit 7,
The LV control circuit 7 sets the spindle motor 4 to a predetermined rotation speed.
Control is performed (S4). When the number of rotations of the spindle motor 4 has reached the start of recording,
Address Ar₀CLV control speed Rr corresponding to₀Nana
After that, the playback start absolute address Ap₀CLV corresponding to
Control speed Rp₀Is set in the controller 10 (S
5). Then, once read into the buffer memory 26
Control to correct the read speed of playback data
Clock signal supplied to the buffer memory 26 from the
Signal frequency tp₀Is calculated (S6). Frequency tp₀Calculation
How to get out is as described above,
1 is controlled by the CLV, when the buffer memory 26
Constant frequency t of clock signal for reading₁Against
hand, tp₀= T₁× Rp₀/ Rr₀ By the frequency tp₀Can be requested. Thereafter, the optical head 3 is moved to the reproduction start absolute address.
Su Ap₀To read the playback signal once.
It is stored in the memory 26 (S7). Of the specified number of blocks
When data playback is over, for simultaneous processing of recording and playback,
The optical head 3 has a recording start absolute address Ar₀Wait back to
(S8). On the other hand, the controller 10
Several tp₀Clock signal to the buffer memory 26.
(S9) The read data is sent to the reproduction data processing circuit 9
(S10). Also, the next time the next playback takes place
Reproduction absolute address Ap_nIs set in the controller 10
(S11). Next, in S12, the mode of the simultaneous processing of recording and reproduction is set.
Mode to another mode (single function mode for recording or playback only).
Or change request to stop or stop)
Is determined. If there is no mode change request,
Temporarily accumulates in buffer memory 21 after preprocessing such as report compression
The recorded data is transmitted through the recording data processing circuit 22.
And writes it in the buffer memory 25 (S13). This
1 is a recording start absolute address Ar₀CLV corresponding to
Control rotation speed Rr₀At a constant frequency t₁To
Clock signal read from the buffer memory 25
Supplied from the controller 10 for the
Address Ar₀Recording is started from (S14). Further, at S15, the next recording is performed.
Times record absolute address Ar_nIs set in the controller 10.
In S16, the controller 10 sends the next recording absolute address.
Less Ar_nTo the CLV control circuit 7
The CLV control circuit 7 controls the spindle motor 4
To control the number of rotations. The rotation speed of the spindle motor 4 is
Times record absolute address Ar_nCLV control speed corresponding to
After reaching Rrn, the process returns to S5, and thereafter, the mode is changed to S12.
Until a change request is made, simultaneous processing of recording and playback is repeated
Is done. When a mode change request is made in S12, S
At 17, the contents of the change mode are determined and processed in the change mode.
Advances (S18), or simultaneous processing of recording and reproduction ends.
(S19). As described above, in the above embodiment, the CD format
Although the application example based on the mat has been described, the present invention is not limited to this.
The block configuration and sector configuration are not specified.
Various forms are possible, preformatting absolute addresses.
That various forms can be applied to
Of course. In this embodiment, audio information is taken.
Deals with visual information or other visual or auditory information
The present invention can be applied to the case of
Can be. Further, in this embodiment, the compressed audio
The explanation using the example using information
Basically, the write and read sides of the buffer memory
If there is a difference in information transfer speed between and, it can be implemented in various forms
It is. For example, taking the above CD format as an example,
By increasing the linear velocity of the disc,
Conventional CD audio information that is not compressed (sampling frequency =
44.1 kHz, number of quantization bits = 16 bits, channel
This can be performed with the number of tunnels = 2). Further, an external storage device for a computer is provided.
Hard disk drives as well as
Disk drive, floppy disk drive, and magnetic tape
The recording device may be implemented without departing from the spirit of the present invention.
It is possible. [0093] According to the present invention, with respect to the second radial position,
Without changing the rotation speed of the recording medium.
The position recorded in advance on the entire surface of the recording medium by the constant control method
Recording and reproduction can be performed immediately based on the information.
As a result, information recording / reproducing by the linear velocity constant control method
Involves moving the read / write head, which was the biggest challenge of the device
The effect that the high speed of the recording / reproducing operation can be realized
Play.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an information recording / reproducing apparatus according to the present invention. FIG. 2 is an explanatory diagram showing a recording area of a recording medium used in the embodiment. FIG. 3 is a partially enlarged plan view showing a recording form example of position information recorded in advance on the recording medium of FIG. 2; FIG. 4 is a schematic diagram showing a main data format in a sector. FIG. 5 is a schematic diagram showing a sector configuration in a block. FIG. 6 is a timing chart showing a flow of information related to a recording operation. FIG. 7 is a timing chart showing a flow of information related to a reproducing operation. FIG. 8 is a schematic diagram showing a reproduction position on a recording medium. FIG. 9 is a schematic diagram illustrating a relationship between a rotation speed of a recording medium and a bit length of reproduction information. FIG. 10 is a schematic diagram showing a change in a bit length of reproduction information input / output to / from a buffer memory. FIG. 11 is an explanatory diagram showing a center frequency of an absolute address carrier signal detected from position information recorded on a recording medium. FIG. 12 is a timing chart showing a flow of information relating to simultaneous processing of a reproducing operation and a recording operation. FIG. 13 is an explanatory diagram showing a recording area of a conventional compact disc. FIG. 14 is a schematic diagram showing a frame signal format of a conventional compact disc. FIG. 15 is a schematic diagram showing a sector format of a conventional compact disk. FIG. 16 is a flowchart showing a control flow of movement of an optical head and signal processing in simultaneous recording and reproduction processing of the present invention. [Description of Signs] 1 disk (recording medium) 4 spindle motor (rotation speed control means) 6 pre-recorded information detection circuit (position information detection means) 7 CLV control circuit (rotation speed control means) 10 controller (control means) 14 buffer Memory (reproducing storage means) 21 Buffer memory (recording storage means) 25 Buffer memory (data transfer speed correction means) 26 Buffer memory (data transfer speed correction means)

Continuation of the front page (56) References JP-A-3-156773 (JP, A) JP-A-3-63966 (JP, A) JP-A-3-134866 (JP, A) JP-A-4-307468 (JP) , A) JP-A-61-131236 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 20/10 G11B 19/00-19/18 G11B 19/20-19/28

Claims (1)

(57) An information recording / reproducing apparatus using a disk-shaped recording medium in which position information is previously recorded on the entire surface by a constant linear velocity control method, wherein: Recording / reproducing means for recording / reproducing information at a radial position and a second radial position; detecting means for detecting positional information on the recording medium; and a rotational speed of the recording medium based on the positional information at the first radial position. and times <br/> rotation number control means for setting the rotational speed based on the constant linear velocity control scheme, the first storage means for temporarily storing information is recorded and reproduced in the second radial position, said storage Correction means for correcting the transfer speed of the information stored in the means, and performs recording or reproduction only at the first radial position.
The rotation speed control means maintains the rotation speed.
And, wherein the first, at the same time line recording and reproduction with respect to the second radial position
In this case, the rotation speed control means may be configured to control the second radial position.
When recording / reproducing information to / from the device, the rotation speed is maintained.
The correction means stores the second data stored in the storage means.
The transfer speed of the information on the radial position of
The second data rate to always be equal to the
An information recording / reproducing apparatus, wherein correction is performed based on position information of a radial position .