KR970017414A

KR970017414A - Variable speed playback control device in optical disc playback system

Info

Publication number: KR970017414A
Application number: KR1019950032692A
Authority: KR
Inventors: 김준식
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-09-29
Filing date: 1995-09-29
Publication date: 1997-04-30
Also published as: KR0182436B1

Abstract

본 발명은 광디스크재생시스템에서 가변속재생기능에 따른 마스터클럭의 급격한 가변시에 스핀들서보계에 공급되는 구동클럭이 해당 마스터클럭의 변화 상태에 최적으로 추종할 수 있도록 함과 더불어, OSP의 데이터 처리동작이 스핀들모터의 가변속동작과 동기적으로 이루어질 수 있도록 하는 광디스크재생시스템에서의 가변속재생제어장치를 제공한다.The present invention allows the drive clock supplied to the spindle servo meter to follow the change state of the corresponding master clock at the time of sudden change of the master clock according to the variable speed playback function in the optical disc reproducing system, and the data processing operation of the OSP. A variable speed regeneration control apparatus in an optical disc reproducing system which can be synchronized with the variable speed operation of the spindle motor is provided.

그에 따라, 본 발명은 광디스크(D)로부터 독립된 RF신호에서 PLL회로(10)를 통해 채널클럭을 복원하고, 기준클럭으로부터 마스터클럭을 PLL회로(16)에서 발생하여 내부버퍼(24)와 여타의 내/외부회로측으로 공급하며, 그 채널클럭과 마스터클럭의 위상을 위상비교기(22)에서 비교하여 구동클릭을 발생하고서 상기 구동클럭을 공급받아 광디스크(D)를 회전시키는 스핀들모터(28)를 구동시키는 모터구동부(26)에 공급하기 위한 DSP(6)를 갖춘 광디스크재생시스템에 있어서, 가변속재생에 따라 상기 모터구동부(26)에서 가변속주파수에 신속히 추종할 수 있도록 하는 가속/감속신호를 발생하는 가속/감속신호발생부(30), 가변속재생기능시에 상기 감속/감속신호발생 부(30)로부터의 가속/감속신호를 상기 모터구동부(26)측으로 공급하기 위한 스위칭절환을 수행하는 제1스위치부(32), 상기 PLL회로(10)로부터의 채널클럭의 주파수를 4배로 체배하는 주파수 체배부(34), 상기 4배로 체배된 체배클럭을 상기 내부버퍼(24)와 내/외부 회로측으로 공급하기 위한 스위칭절환을 수행하는 제2스위치부(36) 및, 기능설정부(38)의 키입력에 의한 가변속재생기능의 실행명령에 따라 상기 제1 및 제2스위치부(32,36)의 스위칭절환을 제어하는 마이컴(40)을 구비하여 구성된 것을 특징으로 한다.Accordingly, the present invention recovers the channel clock through the PLL circuit 10 in the RF signal independent from the optical disk D, and generates a master clock in the PLL circuit 16 from the reference clock, thereby causing the internal buffer 24 and the other. It supplies to the internal / external circuit side, and compares the phase of the channel clock and the master clock in the phase comparator 22 to generate a drive click and receives the drive clock to drive the spindle motor 28 to rotate the optical disc D. An optical disc reproducing system having a DSP (6) for supplying to a motor driving section (26), the acceleration for generating an acceleration / deceleration signal that allows the motor driving section (26) to quickly follow the variable speed frequency in accordance with variable speed regeneration. / Deceleration signal generation section 30, the first switching to perform the switching switching for supplying the acceleration / deceleration signal from the deceleration / deceleration signal generation section 30 to the motor drive section 26 in the variable speed regeneration function A switch unit 32, a frequency multiplier 34 that multiplies the frequency of the channel clock from the PLL circuit 10 by four times, and the multiplication multiplied by four times the internal buffer 24 and the internal / external circuit side. The second switch unit 36 for performing switching switching for supply and the first and second switch units 32 and 36 according to the execution command of the variable speed regeneration function by the key input of the function setting unit 38. Characterized in that it comprises a microcomputer 40 for controlling the switching switching.

Description

Variable speed playback control device in optical disc playback system

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

제1도는 종래의 일반적인 광디스크재생시스템의 가변속재생장치를 나타낸 블럭구성도,1 is a block diagram showing a variable speed reproducing apparatus of a conventional general optical disc reproducing system;

제2도는 본 발명에 따른 광디스크재생시스템에서의 가변속재생제어장치를 나타낸 블럭구성도이다.2 is a block diagram showing a variable speed reproduction control apparatus in the optical disc reproduction system according to the present invention.

Claims

In the RF signal read from the optical disc D, the channel click is restored through the PLL circuit 10, and the master clock is generated from the PLL circuit 16 from the reference click to the internal buffer 24 and other internal / external circuits. And a motor driving part 26 for generating a driving clock by comparing the phase of the channel clock and the master clock with the phase comparator 22 and driving the spindle motor 28 to receive the driving clock and rotate the optical disc D. In an optical disc reproducing system having a DSP (6) for supplying an acceleration / deceleration signal, an acceleration / deceleration signal generation for generating an acceleration / deceleration signal that allows the motor driver 26 to quickly follow each shift frequency in accordance with variable speed reproduction. The first switch unit 32 performs switching switching to supply the acceleration / deceleration signal from the acceleration / deceleration signal generator 30 to the motor driver 26 in the variable speed regeneration function. , P A frequency multiplying unit 34 multiplying the frequency of the channel clock from the LL circuit 10 by four times, and switching switching for supplying the multiplying multiplication clock four times to the inner buffer 24 and the internal / external circuit side. A microcomputer for controlling switching of the first and second switch units 32 and 36 according to the execution command of the variable speed regeneration function by the key input of the second switch unit 36 and the function setting unit 38 40. A variable speed reproduction control apparatus for an optical disc reproduction system, comprising: a).

※ Note: The disclosure is based on the initial application.