JPH07271516A - Recording / playback device - Google Patents

Abstract

(57) [Summary] [Object] According to the present invention, in a recording / reproducing apparatus, a plurality of bytes of data whose addresses are not consecutively stored in a memory are continuously transmitted by a simple configuration. [Structure] A register (2
4) The bit is raised, the start address of the storage position of the information data (D1) stored in the memory means (12) is set in the first counter (20), and the end address of the information data (D1) is set to the first. Second information data (D4) which is continuously set in the middle of sending the information data (D1) by starting the sending of the information data (D1) by the control means (4). The start address of the storage position of is stored in the counter (20) from the second register (22), and the end address of the information data (D4) is stored in the first register (21) from the third register (23). .

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Industrial Application Conventional Technology (FIGS. 5 and 6) Problems to be Solved by the Invention Means for Solving Problems (FIGS. 1 to 4) Actions (FIGS. 3 and 4) Embodiments (FIGS. 1 to 1) Figure 4) Effect of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and can be applied, for example, to continuously transmitting a plurality of data whose addresses are not consecutive stored in a memory of a magneto-optical disk apparatus.

[0003]

2. Description of the Related Art Conventionally, for example, in a magneto-optical disk device, when data is recorded on a magneto-optical disk, data at various transfer rates input from an external output device is temporarily stored in a buffer memory. Thereby, the transfer rate of the transfer data is adjusted and the data is output to the transfer destination.

Here, for example, data D1 and data D which are a set of a plurality of data stored in the memory 1 shown in FIG.
FIG. 6 shows a timing chart in the case of sequentially transferring data whose storage data does not have consecutive addresses in the memory 1 as shown in FIG. First, when the CPU (not shown) detects the recording start portion of the disk (not shown), the start address a and the end address b of the transfer data D1 are set at timings 1a and 1b, respectively. Further timing 2
When the data transfer is executed at a, the data transfer of the data D1 ends at the timing 2b. Subsequently, the CPU sets the start address c and the end address d of the remaining transfer data D4 at timings 1c and 1d, respectively, and executes data transfer at timing 2c.

[0005]

In the above example, when the transfer of the data D1 is completed at the timing 2b, the data transfer is temporarily stopped at this point. Where C
After this interruption, the PU performs control to detect the recording area on the disk where the data D4 is recorded again. This results in CPU
Time t until the recording area on the disk is detected by
Therefore, there is a problem that the operation function of the entire magneto-optical disk device is deteriorated.

The present invention has been made in consideration of the above points, and is intended to propose a recording / reproducing apparatus which continuously transfers a plurality of data having non-consecutive addresses stored in a memory with a simple structure. Is.

[0007]

In order to solve such a problem, in the present invention, information data is recorded on a predetermined recording medium (3) and / or the information data is reproduced from the recording medium (3). In the recording / reproducing apparatus (2), when recording the information data (D1, D4, D6) and / or when reproducing the recording medium (3), the information data (D1, D4, D6) is sent out every predetermined unit. Memory means, and memory control means (13) for transmitting the information data (D1, D4, D6) for each predetermined unit stored in the memory means (12) in a distributed manner as continuous information data for each predetermined unit, A control means (4) for controlling recording and / or reproduction of information data (D1, D4, D6) is provided.

[0008]

When the first information data (D1) and the second information data (D4) of a predetermined unit are continuously transmitted, the memory control means (13) raises the bit of the register (24) to change the memory. Information data stored in the means (12) (D
The start address of the storage position of 1) is set in the counter (20), the end address of the information data (D1) is set in the first register (21), and the control means (4) stores the information data (D1). Substituting the start address of the storage position of the second information data (D4) to be continuously transmitted from the second register (22) into the counter (20) during the transmission of the information data (D1) after the transmission is started. Then, by substituting the end address of the information data (D4) from the third register (23) into the first register (21), the first address of the first information data (D1) is continuously transmitted and the first address is continuously transmitted. Transmission of the second information data (D4) can be started.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 2 indicates a magneto-optical disk device as a whole. When the disk 3 is loaded in the magneto-optical disk device 2, first, a CPU (central processing unit)
A control command is sent from the system controller 4 having the it) configuration to the servo control circuit 5. As a result, the servo control circuit 5 drives the spindle motor 6 to rotate the disk 3 at a predetermined rotation speed.

Subsequently, the system controller 4 drives the feed motor 7 through the servo control circuit 5 to move the optical pickup 8 to the lead-in area of the disk 3. After moving the optical pickup 8 in this manner, the magneto-optical disk device 2 sends a control command from the system controller 4 to the servo control circuit 5 to drive the optical pickup 8 and irradiate the disk 3 with a light beam. . In this state, the optical pickup 8 receives the reflected light obtained from the disk 3 and sends the reproduction signal obtained as a result to the RF amplifier 10.

The RF amplifier 9 amplifies the reproduction signal obtained from the optical pickup 8 and binarizes the reproduction signal and sends it to the address decoder 10 and the encoder / decoder 11, and generates an error signal based on the reproduction signal. This error signal is output to the servo control circuit 5. As a result, the servo control circuit 5 performs focus control and tracking control of the optical pickup 8 based on this error signal.

The address decoder 10 detects position information data of the light beam irradiation position. In the case where the disk 3 is actually a magneto-optical disk capable of recording and reproducing, a meandering pregroup is formed in advance in the recordable area in accordance with the FM modulated address information data. Therefore, the reproduction signal level of the optical pickup 8 changes following the meandering of the pregroup.

In the magneto-optical disk device 2, the level of the reproduction signal of the optical pickup 8 changes according to the level of the reproduction signal.
The circuit speed information data of the disk 3 is detected and the spindle motor 6 is driven, whereby the disk 3 is rotationally controlled under the condition that the prescribed linear speed is constant. Further, by performing FM demodulation on the reproduction signal of the optical pickup 8, the address information data of the light beam irradiation position can be detected.

On the other hand, when the disk 3 is a read-only optical disk, data is recorded by the self-clock type pit. Accordingly, the spindle motor 6 is driven so that the reproduction signal of the optical pickup 8 changes at a predetermined fundamental frequency, and thereby the disk 3 is rotationally controlled under the condition that the prescribed linear velocity is constant. In this way, the address decoder 10 detects the address information data of the light beam irradiation position.

The encoder / decoder 11 is an RF amplifier 9
The input reproduction signal is decoded. In practice, the encoder / decoder 11 demodulates the output signal of the RF amplifier 9 in sequence in the reproduction mode to obtain demodulation data, and performs error correction processing and deinterleave processing on this demodulation data. This error correction processing is performed based on a CIRC (cross interleave reed-solomon code) error correction code added and recorded to the reproduction data or the like. Therefore, the magneto-optical disk device 2 records the data to which the error correction code is added at the time of recording.

In practice, first, the TOC (table of co) which is management data of the data recorded in the read area of the disk 3 is used.
ntents) Data is read. TOC in the optical disk
The TOC data reproduced from the area is stored in the buffer memory 12.

The system controller 4 is a TOC.
The type of the disk 3 is discriminated based on the identification data attached to the data. When the loaded disk 3 is a recordable magneto-optical disk, the system controller 4 outputs a control command to the servo control circuit 5 to output the UTOC (user t
able of contents) Access the area and play UTOC data. In this way, the magneto-optical disk device 2
Reproduces in advance TOC data and UTOC data, which are management data of the data recorded in the program area,
Based on the TOC data and the UTOC data, desired data can be reproduced from the program area and recorded in the program area.

On the other hand, when the loaded disk 3 is an optical disk for audio, the system controller 4 switches the entire operation mode to the audio data reproduction mode. The audio signal A1 output from the disk 3 is input to the audio compression / decompression circuit 14 via the memory controller 15 and decompressed from the data compressed by the modified DCT (discrete cosine transform). The decompressed audio signal A1 is output to the digital-analog conversion circuit (DA / C) 15 and converted into an audio signal A1 which is an analog signal, and is supplied via the line amplifier 16 or the line amplifier 16 and the headphone. Amplifier 1
It is output via 7.

If the magneto-optical disk device 2 is connected as an external storage device of the host computer 18,
The data D1 input from the host computer 18 is
It is sent to the encoder / decoder 11 via a SCSI (small computer system interface) controller 19. The encoder / decoder 11 performs interleave processing and error correction code generation processing on a plurality of data formed by gathering sector-based data in which headers are added to the data, and converts the data into recording data D1. The recording data D1 is sent to the buffer memory 12 which temporarily stores the data.

As shown in FIG. 2, the buffer memory 12 is controlled by the memory controller 13. The memory controller 13 is provided with a counter 20 for setting a start address a of the first data D1 to be transferred first and a final address b of the data to be transferred for a predetermined number of bytes of data (D1 to D4) which are not continuous in address. A register 21 for setting is installed. In addition to this, the memory controller 13 has a register 22 for setting the start address c of the second data D4 continuously transferred to the first data D1 and a register 23 for setting the final address d of the data to be transferred. is set up.

Further, the memory controller 13 is provided with a register 24 provided with a memory transfer bit B1 for setting a data transfer mode so as to continuously transfer data whose addresses are not continuous. The counter 20 is incremented each time the data D1 is transferred by 1 byte. Here, the count of the counter 20 is the register 21
When the memory transfer bit B1 of the register 24 is 1 when the value b set in
The start address c of the data D4 set in the register 22 is set to the set value of. Further, the address d set in the register 23 is reset in the register 21. As a result, following the data D1, a plurality of data D4 whose addresses are not continuous are continuously transferred.

At this time, the system controller 4 detects the recordable area by referring to the UTOC data in response to the write command for the continuous data D1 input from the host computer 18. Then, by driving the feed motor 7 and the head drive circuit 25, the optical pickup 8 and the magnetic head 25 are moved to an unrecorded recording area. Subsequently, the magneto-optical disk device 2 drives the head drive circuit 25 and the magnetic head 26 according to the recording data, and the modulation magnetic field formed by the magnetic head 26 is applied to the magneto-optical disk 3. The magneto-optical disk device 2 is adapted to record recording data by intermittently irradiating a light beam to the application position of the modulation magnetic field by the optical pickup 8.

In the above configuration, the data input from the host computer 18 is the SCSI controller 19
Is transmitted to the encoder / decoder 11 via. A predetermined number of bytes of data (D1 to D6) generated by the encoder / decoder 11 are sent to the buffer memory 12 and temporarily stored (FIG. 3). Here, as shown in FIG. 4, the system controller 4 has a memory transfer bit B1.
Is set to 1 and data D to be transferred first
The start address a of 1 is set in the counter 20 at the timing 3a. Further, the system controller 4 sends the data D
The end address b of 1 is set in the register 21 at the timing 3b, and the data transfer to the disk 3 is started at the timing 4a. Then, before the transfer of the data D1 is completed, the start address c and the end address d of the data D4 continuously transferred following the transfer of the data D1 from the system controller 4 are registered in the register 2 at timings 3c and 3d, respectively.
It is set to 2, 23.

When the data transfer in the buffer memory 12 is started, the counter 20 is incremented every time 1 byte of the data D1 is transferred. Counter 20 here
When the memory transfer bit B1 of the register 24 is 1, the value c of the register 22 is set to the counter 20, and the value of the register 23 is set to the register 21. Set d. As a result, the transfer of the data D4 is continuously started from the buffer memory 12, and the transfer between the data D1 and the data D4 is not interrupted.

Further, before the timing 4c during the transfer of the data D4, if the start address and the end address of another plurality of data D6 are set in the registers 22 and 23, respectively, the data D6 is transferred following the end of the transfer of the data D4. Will be done. To end the data transfer, the memory transfer bit B1 of the register 24 may be set to 0.

According to the above construction, in the memory controller 15, the memory transfer bit B1 for setting the continuous transfer mode is set to 1, and the start address a of the buffer memory 12 for the data D1 of a predetermined number of bytes to be transferred is counted. 20 and the end address b is set in the register 21. Here, during transfer of the data D1, the register 2 in which the start and end addresses of the data D1 of a predetermined number of bytes and the data D4 of a predetermined number of bytes whose addresses are not continuous are set
By substituting the values of 2 and 23 into the counter 20 and the register 21, respectively, the plural data D4 can be continuously transferred without interruption. As a result, the detection time of the recordable position on the disk 3 that occurs when the data transfer is interrupted can be saved, and the overall time for controlling the buffer memory can be shortened.

In the above embodiment, the data transfer from the buffer memory for storing the record data of the magneto-optical disk device is described, but the present invention is not limited to this.
It may be used when the recording / reproducing apparatus continuously transfers data via the memory.

[0029]

As described above, according to the present invention, the start address of the storage position of the first information data, which is the information data of a predetermined unit stored in the memory means, is set in the counter,
The end address of the first information data is set in the first register, and when the counter reaches the value of the first register, the predetermined unit set in the second register for sending the first information data continuously. By substituting the start address of the storage position of the second information data, which is the above information data, into the counter, and further substituting the value of the third register for setting the end address of the second information data into the first register, , When the output of the first information data is completed, the transmission of the second information data is continuously started, and the first information data and the second information data are transmitted.
It is possible to realize a recording / reproducing apparatus capable of continuously transmitting data even when the addresses of the information data are not consecutive.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a block diagram showing a configuration of a memory controller and a peripheral portion according to the present invention.

FIG. 3 is a schematic diagram showing an array of data on a buffer memory.

FIG. 4 is a timing chart showing the timing of data transfer of the present invention.

FIG. 5 is a schematic diagram showing an array of data on a buffer memory.

FIG. 6 is a timing chart showing a conventional data transfer timing.

[Explanation of symbols]

1 ... Memory, 2 ... Magneto-optical disk device, 3 ... Disk, 4 ... System controller, 5 ... Servo control circuit, 6 ... Spindle motor, 7 ... Feed motor, 8
...... Optical pickup, 9 ... RF amplifier, 10 ... Address decoder, 11 ... Encoder / decoder, 12
...... Buffer memory, 13 ...... Memory controller, 1
4 ... Voice compression / decompression circuit, 15 ... Digital analog conversion circuit, 16 ... Line amplifier, 17 ... Head-on amplifier, 18 ... Host computer, 19 ... SC
SI controller, 20 ... Counter, 21, 22, 2
3, 24 ... Register, 25 ... Head drive circuit, 26
...... Magnetic head.

Claims (2)

[Claims] 1. Information data is recorded on a predetermined recording medium,
And / or in a recording / reproducing apparatus for reproducing information data from the recording medium, when recording the information data and / or reproducing the recording medium, the information data is temporarily stored, and the information data is stored in predetermined units. And memory control means for transmitting the information data for each of the predetermined units stored in the memory means in a distributed manner as the continuous information data for each of the predetermined units, and recording and recording the information data. Alternatively, the recording / reproducing apparatus is provided with a control means for controlling reproduction. 2. The memory control means sets a counter for setting a start address of a storage location of the first information data in a predetermined unit, and a first register for setting an end address of the storage location of the first information data. A second register for setting the start address of the storage location of the second information data in a predetermined unit, a third register for setting the end address of the storage location of the second information data, and the information data in succession. And a fourth register for designating output from the memory, the control means for the memory control means includes contents of the counter and the first, second, third, and fourth registers. By setting, the first information data is sent from the start address to the end address, and the counter is incremented each time the counter sends one byte of the first information data, Note: When the fourth register is designated to continuously transmit the information data, when the count of the first counter becomes equal to the count of the first register, the value of the second register is stored in the counter. 2. The recording according to claim 1, wherein the value of the third register is further substituted into the first register, and the second information data is subsequently sent out from the memory means. Playback device.