KR0152927B1 - Disk running device - Google Patents

Abstract

The present invention relates to a recording information retrieval apparatus for a disc. Conventionally, in the case of a disc retrieval system that maintains a constant rotational speed, the recording density decreases toward the outer side of the disc, which causes a problem of loss of information storage amount, and the rotational speed. In the case of a disc retrieval system in which the disc always maintains a constant angular velocity at the central axis and the outer side, there is no loss of recording density, but there is a problem in that the access time required to convert the rotational speed is long. In order to improve this conventional problem, the present invention records information at a constant density regardless of the position of the disc, and changes the signal processing speed according to the recording position without changing the rotational speed of the disc at the time of retrieval. Invented to shorten the present invention, the recording information is detected by varying a clock according to a recording position on a disc having the same recording density regardless of the position, so that it is not necessary to change the rotational speed of the disc, thereby reducing the information retrieval time. .

Description

Disc recorder retrieval device

1 is a block diagram of a conventional recording information retrieval apparatus for a disc.

2 is a block diagram of a disc recording information retrieval apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

201: head movement control unit 202: movement position calculation unit

203: clock generator 204: head

205: data processing unit 206: buffer

207: interface unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording information retrieval technique of a disc, and more particularly, to a recording information retrieval apparatus for a disc capable of accurately retrieving recording information irrespective of a loss in recording density or a change in the rotation speed of the disc.

1 is a block diagram of a conventional recording information retrieval apparatus of a disc, as shown therein, a movement position calculator 1020 for calculating the rotational speed of the motor and the movement position of the head 104 according to a specific address, and this movement position. A head movement control unit 101 for moving the head 104 to a position calculated by the calculation unit 102, and a motor driving unit 103 for rotating the disc drive motor at a speed calculated by the movement position calculation unit 102; And a data processor 105 for processing the signal detected by the head 104 from the disk and converting the signal into data, a buffer 106 for storing and transmitting the output data of the data processor 105, and the moving position. The interface unit 107 inputs an address for the disc search to the calculation unit 102 and makes a data transfer request to the buffer 106.

Referring to the prior art and the operation process as follows.

First, the movement position calculation unit 102 receiving the information of a specific address from the interface unit 107 calculates the rotational speed of the driving motor and transmits it to the motor driving unit 103, and the head 104 to the head movement control unit 101. Will require a position shift.

At this time, the head movement control unit 101 moves the head 104 to the corresponding position on the disk calculated by the movement position calculation unit 102.

After that, when the reproducing operation for retrieving the record information is started, the motor driving unit 103 rotates the disc by driving the motor at the rotational speed calculated by the moving position calculating unit 102.

At this time, when the head 104 detects the recording information of the disk at a constant speed according to the designated protocol, the data processing unit 105 converts the data into signal through signal processing and stores it in the buffer 106.

Accordingly, when the interface unit 107 requests data transfer, the buffer 106 transfers the stored data.

When the storage area of the buffer 106 is completely filled, the control signal is transmitted to the head 101 so that the recording information is no longer detected.

In general, however, recording data on the central axis and the outer side of the disc are recorded at different densities by the difference in the respective speeds.

Therefore, in the related art, in the case of a disc retrieval system maintaining a constant rotational speed, the recording density decreases toward the outer side of the disc, which causes a problem of loss of information storage.

In addition, the disc retrieval system in which the disc maintains the constant angular velocity of the central axis and the outer side at all times by varying the rotational speed has no problem of loss of recording density, but has a problem in that the access time required to change the rotational speed is long.

The present invention reduces information retrieval time by varying the signal processing speed according to the recording position without changing the rotational speed of the disc during recording and retrieving the information at a constant density regardless of the position on the disc in order to improve the conventional problems. It is an object of the present invention to provide a recording information retrieval apparatus for a disc, which can be created.

2 is a block diagram of a recording information retrieval apparatus of a disc of the present invention, as shown therein, a movement position calculator 202 for calculating the movement position of the head 204 according to a specific address and outputting clock variable information; A head moving control unit 201 for moving the head 204 to a position calculated by the moving position calculating unit 202, and a data processing unit for processing the signal detected by the head 204 from the disk and converting the signal into data ( 205, a buffer 206 for storing and transmitting the output data of the data processing unit 205, inputting an address for disc search into the movement position calculating unit 202, and requesting data transfer to the buffer 206. A clock generator 203 for supplying a variable clock to the head 204, the data processor 205 and the buffer 206 according to the clock variable information of the moving position calculator 202. ).

Referring to the operation and effect of the present invention configured in this way in detail as follows.

First, the movement position calculator 202, which has received the information of a specific address from the interface unit 207, calculates the movement position of the head 204 and transmits it to the head movement control unit 201, and at the search information position on the disc. The clock generator 203 is requested to vary the clock.

At this time, the head movement control unit 201 moves the head 204 to the corresponding position on the disk calculated by the movement position calculation unit 202.

The clock generator 203 generates a clock corresponding to the position on the disk on which the search information is recorded according to the clock variable information of the movement position calculator 202 to generate the head 204, the data processor 105 and the buffer ( 206).

Accordingly, when the head 204 detects the recording information on the disk that rotates at a constant speed, the data processing unit 205 converts the data into signal through signal processing and stores it in the buffer 206, and the buffer 206 is stored in the storage area. When all of these are filled, the head 201 transmits a control signal so as not to detect recording information of the disc.

Thereafter, when the interface unit 207 requests data transfer, the buffer 206 transfers the stored data.

As described in detail above, the present invention has the effect of reducing the information retrieval time without having to change the rotational speed of the disk since the recording information is detected by varying the clock according to the recording position on the disk having the same recording density regardless of the position. have.

Claims (1)

A movement position calculation unit 202 for calculating a movement position of the head 204 according to a specific address and outputting clock variable information, and for moving the head 204 to a position calculated by the movement position calculation unit 202. A head movement control unit 201, a data processing unit 205 for converting the detection signal of the head 204 into data, a buffer 206 for storing and transmitting output data of the data processing unit 205, and the movement. The interface unit 207 for inputting a specific address for disk search into the position calculator 202 and requesting data transfer to the buffer 206 and the clock variable information of the movement position calculator 202. And a clock generator (203) for supplying a variable clock to the head (204), data processor (205) and buffer (206).