KR950009647A

KR950009647A - Linear velocity detection method of optical disc player

Info

Publication number: KR950009647A
Application number: KR1019930019622A
Authority: KR
Inventors: 김상우
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1993-09-24
Filing date: 1993-09-24
Publication date: 1995-04-24

Abstract

본 발명은 콤팩트 디스크 플레이어, 레이져 디스크 플레이어, 콤팩트 디스크 롬(CD-ROM)드라이버 등과 같은 광 디스크 플레이어에서 디스크의 선속도(CLV;Constant Linear Velocity)를 검출하는 방법에 관한 것이다.The present invention relates to a method for detecting a constant linear velocity (CLV) of a disc in an optical disc player such as a compact disc player, a laser disc player, a compact disc ROM (CD-ROM) driver and the like.

종래에 선속도의 검출이 요구되지 않는 광디스크 플레이어에서는 데이터를 검색하는데 많은 시간이 소요되는 단점이 있고, 반사판과 광센서를 이용한 선속도 검출방법은 추가되는 하드웨어를 요구하므로 비용 상승과 소형 경량화의 장애가 초래되는 문제점이 있게된다.Conventional optical disc players that do not require linear speed detection require a lot of time to retrieve data, and the linear speed detection method using a reflector and optical sensor requires additional hardware, thereby increasing costs and minimizing weight reduction. There is a problem that results.

본 발명은 광디스크를 회전 구동시키면서 광픽업으로 스캐닝되는 디스크 트랙수를 카운트하고, 시간에 따라 변화되는 트랙수를 이용해서 선속도를 검출하는 방법으로서, 광디스크(11)를 임의의 기준 선속도로 간주한 상태에서 광디스크(11)내주의 초기 위치로부터 외주의 목표 위치까지 설정된 트랙수 만큼 픽업(14)을 구동시키는 제1단계와, 상기 제1단계에서 도달한 목표 위치에서의 시간 정보를 읽어내고, 읽어낸 시간 정보와 기준 선속도로 간주한 상태에서 정해지는 목표 시간 정보를 비교하여 그 편차(시간 차이 값)를 계산하는 제3단계와, 상기 제3단계에서 계산된 편차를 기준 선속도와 실제 선속도 사이의 관계를 이용해서 구해 놓은 편차와 비교하여 광디스크(11)의 선속도를 판정하는 제3단계를 실행하여 상기한 종래의 문제점을 해소하고, 간소한 구성으로 광디스크의 선속도를 검출하는 방법이다.The present invention is a method of counting the number of disc tracks scanned by an optical pickup while rotating the optical disc, and detecting the linear velocity using the number of tracks that change over time, wherein the optical disc 11 is regarded as an arbitrary reference linear velocity. Reading the time information at the target position reached in the first step by driving the pickup 14 by the number of tracks set from the initial position of the inner side of the optical disc 11 to the target position of the outer side in one state; A third step of calculating the deviation (time difference value) by comparing the read time information with the target time information determined in the state considered as the reference linear velocity, and comparing the deviation calculated in the third phase with the reference linear velocity and the actual The above-mentioned conventional problem is solved by executing the third step of determining the linear speed of the optical disc 11 in comparison with the deviation obtained using the relationship between the linear speeds. The configuration is a method of detecting the linear velocity of an optical disk.

Description

Linear velocity detection method of optical disc player

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명을 실행하는 광디스크 플레이어의 선속도 검출장치의 구성도,2 is a configuration diagram of a linear velocity detection apparatus of an optical disc player embodying the present invention;

제3도는 본 발명을 설명하기 위한 광디스크의 선속도에 따른 트랙수를 나타낸 도면,3 is a diagram showing the number of tracks according to the linear velocity of the optical disk for explaining the present invention;

제4도는 본 발명을 설명하기 위한 광디스크의 선속도에 따른 트랙수를 나타낸 도표.4 is a chart showing the number of tracks according to the linear velocity of the optical disc for explaining the present invention.

Claims

Driving the pickup 14 by the number of tracks set from the initial position of the optical disc 11 to the target position of the outer periphery while the optical disc 11 is regarded as an arbitrary reference linear velocity; and the target position reached in the step Calculating the deviation (time difference value) by reading the time information in Equation 2, comparing the time information read with the target time information determined in consideration of the reference linear velocity, and based on the deviation calculated in the above step. And determining the linear velocity of the optical disc (11) in comparison with the deviation obtained using the relationship between the linear velocity and the actual linear velocity.

The method according to claim 1, wherein the actual linear velocity of the optical disc (11) is detected by setting the reference linear velocity to 1.3 m / sec.

The method of claim 1, wherein a time deviation value between 1.2 m / sec and 1.2 m / sec 1.3 m / sec and 1.4 m / sec is obtained by storing the reference linear velocity at 1.3 m / sec, and storing the deviation in the storage means. A linear speed detection method of an optical disc player, characterized in that the actual linear speed of the optical disc 11 is determined by using a value.

Counting the number of tracks while driving the pickup 14 in the same time zone of the optical disc 11 while the optical disc 11 is regarded as an arbitrary reference linear speed, and the number of tracks counted in the step and the reference linear speed Calculating the deviation (difference value of the number of tracks) by comparing the reference number of tracks determined in the considered state, and calculating the deviation calculated using the relationship between the reference linear speed and the actual linear speed. And determining the linear velocity of the optical disc (11) in comparison with that of the optical disc player.

5. The method according to claim 4, wherein the actual linear velocity of the optical disc (11) is detected by setting the reference linear velocity to 1.3 m / sec.

5. The method according to claim 4, wherein the reference linear velocity is set to 1.3 m / sec, the track number deviation value between 1.3 m / sec and 1.2 m / sec 1.3 m / sec and 1.4 m / sec is obtained and stored in the storage means. And the actual linear velocity of the optical disc (11) is determined using this deviation value.

※ Note: It is to be disclosed based on the initial application.