Disk device recording information

 

(57) Abstract:

Usage: the invention relates to the accumulation of information, in particular to techniques for magnetic recording media. The invention is: to improve the accuracy of the account under perturbations of the system is applied, while recording the entered data is sequentially written in the memory with the same speed, and read with the second, higher speed for recording on the recording medium. Reading memory is such that the data in the preset first number of sequentially read from the memory to ensure space memory, having a volume, which is higher than a predetermined second number, when the number of entries stored in the memory exceeds the first number. During playback, the reproduced data reproduced from the second transfer rate required for transmission of reproduced data, and write to the memory. The recorded data is sequentially read from the memory as reproduced data from the first transmission speed. Recording playback data in the memory is controlled so that the second amount of reproducibility is always reproduced in the memory, when the number of reproduced data stored in the memory becomes not higher than the first preset number. 2 C. p. F.-ly, 4 Il.

The invention relates to the accumulation of information, in particular to a disk recording device for recording the serial input data to the disk recording media.

You know the playback device and/or recording information which contains an analog-to-digital Converter (ADC) connected to the input terminal of the analog signal, the first coding block detection and error correction, block sequential write data, the servo control unit, the output associated with the drive of the recording media, such as disks, block the system control micro-computer) associated with the display unit and keyboard.

The disk device writes the digital data that meets the standards of the compact disc (CD) or interactive CD-ROM (CD-1), an optical disk described below type or magneto-optical disc with a rewritable information. In this disk device recording the servo system focal adjustment or tracking of the recording head is rejected due to mechanical disturbances, such as vibration or osti account under perturbations of the system is applied.

This objective is achieved in that in the disk device recording information containing ADC input connected to the input terminal of the analog signal, the first coding block detection and error correction, the output connection and the first input of the block sequential write, the servo control unit, the output associated with the drive of the recording medium, and a first input connected to the first output of the system control unit connected to the second input of the first coding block, and the second output and the input of the system control unit are connected respectively to the input unit of the display and access the keyboard, put the block of random access memory (NVR), the second coding block and the block of formation of the reference signals, connected in a certain way.

The display unit may be in the form of three registers, block subtraction block multiplication, unit and time data display.

The keyboard can be equipped with a key pre-setting of the compression ratio of the time axis of the input data.

In Fig. 1 depicts a block diagram of a structure of a disk recording device of Fig. 2 block diagram of the structure of the imaging unit in the disk recording device, izobretaya recording/playback pictured - tion in Fig. 1; Fig. 4(a)-4(f) are diagrams showing successive States of the memory which is operated in the recording system of the disc recording device in accordance with the invention.

Disk recording system includes a magneto-optical disk 1 serving as a recording medium, which is put into rotation at a given speed by means of spindle motor 2. Recording data on tracks of the recording optical magnetic disk 1 is achieved by filing a magnetic field, modulated in accordance with data to be written on the magnetic head 3, when the disk 1 is irradiated with laser light from the optical head 4. The recorded data is achieved by tracking the track record on the optical magnetic disk 1 with laser light from the optical head 4.

Head 4 consists of a laser light source such as a laser diode, optical components, such as a collimating lens, a lens, a polarizing light beam splitter, a cylindrical lens and a photodetector, which are located in predetermined positions. The head is opposite the magnetic head 3 so that the magneto-optical disk 1 is located between the heads. Golovnina field, modulated in accordance with data to be written. Exciting the magnetic head 3, the data recorded on the magneto-optical disk 1 by thermomagnetic recording.

The optical head 4 also detects laser light reflected from the irradiated track the target, to determine the focal error by, for example, astigmatism method or to determine the tracking error by, for example, push-pull method, and generates a playback signal by detecting differences in the polarization angle (angle of Kerr rotation) of the laser light reflected from the track the target when playing a data Manito-optical disk.

The output signal from the optical head 4 serves to block 5 forming the reference frequency. Unit 5 extracts the signal of the focal error or signal error tracking from the output signal of the optical head for feeding them to the block 6 of the servo.

Unit 6 servo consists of schemes focus servo control, schema, tracking servo control, schema servo - management spindle motor schema of the drive servo. Diagram of the focus servo performs focus control optical system optical the program carries out tracking control of the optical system, the optical head so that the signal of the tracking error becomes zero. Diagram of the servo spindle motor provides control of the spindle motor 1 so that the magneto-optical disk 2 is forced to make the rotation at a given speed of rotation.

Unit 6 servo drive moves the head 4 and 3 in the position to track the target on the magneto-optical disc 1, which indicates the block 7 system management. Unit 6 supplies unit 7 information describing operating States of various devices.

The block 7 is connected to a keyboard 8 and block 9 display. The system controller 7 controls the recording system and a playback system in operation (compression mode), the specified dialed information output from the keyboard 8, and a recording position and a playback position on the track record tracked by the cylinder 4 and the cylinder 3, respectively, based on the address information of the sector unit-readable recording tracks of the magneto-optical disc 1 according to the title: time and podkomiteta. The system controller 7 generates the block 9 data of the absolute time corresponding to the recording position and the position FOTS is we, and data shift order shown on the screen unit 9 recording time and playback time.

Unit 9 display includes a block 10 subtraction, which serves data absolute time through the first register 11 and data through the second shift register 12. The multiplier 13 serves data compression rate of the block 7 through the third register 14 and the output of the subtraction of the block 10 subtraction. On the display 15 serves the output of multiplication of the multiplier 13.

The display 15 displays the actually elapsed time period only program data that is currently recorded or reproduced, based on the output of the multiplication. Although in the specified embodiment, the display shows the actual time software-only data, the total period of time up to the present time can also be shown on the display by selecting the values of the data shift. This information is prepared on the basis of the data tables of contents (TOC), which is prerecorded on the disk. The display 15 is also connected to the base 16 of time, which interpolates and display shows time, if the compression coefficient recording system or reproducing system high or required display time in small units.

Unit 20 operates in accordance with the various modes in the above-mentioned system CD-1 process for compressing digital audio data of a specified transmission speed. The operating mode specifies the system controller 7. In this embodiment, it is assumed that the digital audio signal of the CD-DA is converted into a sound a time axis AD stereo level with the transmission speed of 18, 75 (75/4) sectors per second, by performing data compression to 1/4 by block 20. Audio data AD stereo level, which consistently issue with transfer speeds of 18, 75 sectors per second guide block 21 memory (NVR).

Writing the data into the block 21 and read from it manages the system controller 7. Audio data AD stereo level consistently write in block 21 with a baud rate of 18, 75 sectors per second, and subsequently read from the block 21 by the packet transfer rate of 75 sectors per second as the data for the transmission 18, 75 sectors per second by sequential increase the record pointer W of the block 14 with transfer speeds of 18, 75 sectors per second, as shown in Fig. 4(a)-4(b). Then, as shown in Fig. 4(C)-4(d), and again in Fig. 4(e)-4(f), the system controller 7 reads data records from the memory unit 21 service number To the stored data, i.e., with a speed of 75 sectors per second, by increasing the read pointer R of the memory 14 with the transfer rate of 75 sectors per second, when the number of sound data AD stored in memory 14 exceeds the number K. the Audio data AD, i.e. data records that were read by the packet from the memory unit 21 with the transfer rate of 75 sectors / second, are served on the first block of 22 coding.

Unit 22 performs the encoding process or processing F-encoding of the write data, the incoming packet from the memory unit 21 for error correction. Written data, which was subjected to the encoding process on the block 22 serves to block 23 entries.

The block 23 is connected to the magnetic head 3 for excitation so that the magnetic field modelirovanie in accordance with the data to be written, was applied in the magneto-optical disk 1.

System contrack way to write data, which service is considered from the memory unit 21 in this memory management, were sequentially recorded on the recording tracks of the magneto-optical disk 1, as shown in Fig. 3. The system controller 7 controls the final position of the data recorded on the tracks recording magneto-optical disk 1, and supplies the block 6 of the servo control signal to indicate the position of the recording in accordance with the last position recorded data.

When the number of sound data AD stored in the memory 21, exceeds the specified number, the audio data AD service read from the memory 21 as a data record with a transfer speed of 75 sectors per second. Preferably, the specified number of data was not less than the minimum recording unit of the data being written. Therefore, this input can be sequentially written in the memory 21, always ensuring that the range of the data records will have a volume greater than the specified number in the memory unit 21.

The recorded data that the packet read from the memory can be recorded on the recording tracks of the magneto-optical disk 1 serial by managing the recording position on the track of the disc 1 through C is an ascending number. Accordingly, if the write operation on the magneto-optical disk is interrupted by the appearance of jumping over tracks or another case arising out of the disturbances, which detects the system controller 7 may be performed by the restore operation with simultaneous recording of the input data in the data recording area having a volume that exceeds the specified number, and the entered data can be recorded on a track record magneto-optical disk sequential way.

Initial data time (absolute time information) corresponding to the physical sector address is added to the audio data AD for each sector and recorded on the magneto-optical disk 1. Data TOC, describing the recording area and the recording mode, put in the table, pre-installed on the disk in a predetermined position.

The playback system includes a decoder 24, which includes reproducible output signals received by tracing the recording tracks of the magneto-optical disc 1 with a laser beam generated by the optical head 4, and binary coded block 5.

The decoder 24 corresponds to the encoder 22 and Vyborov. The output of the decoder are audio data AD mentioned stereo level with a data transfer rate of 75 sectors per second, which is higher than normal speed transmission in stereo level Century. Reproducible data serves in the memory 25 (NVR).

Writing the data into the memory 25 and read data from it manages the system controller 7 so that the reproduced data is supplied with a transfer speed of 75 sectors per second from the decoder 24, and record in the batch mode in the memory 25 with a transfer speed of 75 sectors per second and sequentially read from the memory at normal speed transmission 18, 75 sectors per second stereo level 8.

The system controller 7 writes the reproduced data in the memory 25 with a speed of 75 sectors per second by increasing the record pointer W of the memory and sequentially read reproducibility - input-rate, 18, 75 sectors per second of memory by successively increasing the read pointer R-rate, 18, 75 sectors per second.

Audio data AD stereo level In which they receive as reproduced data is read sequentially from the memory 25 with a baud rate of CM recording system. An operating mode of the decoder AD specifies the system controller 7. In this embodiment, the decoder reproduces digital audio data, expanding audio data AD stereo level In four times. Digital audio data is served on the d / a Converter 27 which converts the digital audio data received from the decoder AD 26, into analog audio signals And/opt. and outputs them to output terminal 28 through the filter 27 low frequencies. The digital audio signals from the decoder AD 26 generates the digital output terminal 30 via the digital output of the encoder 31.

Although the embodiment of the disc recording device described with reference to the recording of audio data AD in stereo level, you can record audio data AD another mode to another system CD-1. It will be enough to carry out the process of compressing the time axis of the audio data PCM mode CD-DA in the memory 25 for recording recorded data, causing the magneto-optical disk 1 to rotate at a speed dependent on the compression ratio of the process time axis of the recording system, and to perform the process of expanding the time axis in the memory 25 of the playback system.

In the disk device memory means. When the number of input data stored in the memory means exceeds a preset number, the stored input data is sequentially read from the memory means in batch mode as a data recording rate, which is higher than the transmission rate of the input data. Accordingly, the input data can be sequentially recorded in the memory means, always ensuring the presence of region entry data, having a volume that exceeds the specified number in the memory means. The recorded data are read from memory in batch mode, recorded on recording tracks serial by managing the recording position on the tracks of the recording disk media record.

The area recording data having a volume that exceeds the specified number, it is always ensured in the memory means as described above. Therefore, the input data can continue to record in the memory means, even if the write operation on the disk recording medium interrupts jump through tracks or other incident occurring due to disturbance; during this interrupt, you can perform the restore operation. Thus, the input data can be recorded on the recording tracks of the disk media Sisto RECORDING INFORMATION containing analog-to-digital Converter input coupled to the input terminal of the analog signal, the first coding block detection and correction of errors, the output is connected to the first input of the block sequential write data to the tracks of the recording medium, the servo control unit, the output associated with the drive of the recording medium, a first input connected to the first output of the system control unit connected to a second input of the first block coding with detection and correction of errors, and the second output and the input of the system control unit are connected respectively to the input unit of the display and access the keyboard, characterized in that, to improve the accuracy of the account under perturbations of the system is applied, it introduced a block of random access memory, the second coding block, the block forming the reference signal, the first output of which is connected respectively to the second inputs of the block sequential write data to the tracks of the recording media, the first block coding and the second coding block, and the second output to a second input of the servo control unit the output of the analog-to-digital Converter connected to the first input of the second coding block, the output of which is, the Torah an input connected to the third output of the system control unit, and the output of the high speed data transmission is connected to the first input of the first block coding with detection and correction of errors.

2. The device under item 1, characterized in that the display unit is made in the form of three registers, inputs which are input unit, display unit, subtraction, summation and subtractive inputs of which are connected respectively to the outputs of the first and second registers, block multiplication, two inputs of which are connected to the outputs of the subtraction unit and the third register block and time data display, two inputs of which are connected to the outputs of block multiplication and unit time data.

3. The device according to p. 1, wherein the keyboard has a key pre-setting of the compression ratio of the time axis of the input data.

 

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