JPH0348977U

JPH0348977U -

Info

Publication number: JPH0348977U
Application number: JP10823389U
Authority: JP
Priority date: 1989-09-14
Filing date: 1989-09-14
Publication date: 1991-05-13

Description

[Brief explanation of drawings]

第１図は本考案の一実施例のデイスクプレーヤ
装置の構成を説明するためのブロツク図、第２図
は従来のデイスクプレーヤ装置を説明するための
ブロツク図である。３１……ピツクアツプ、３３……ＦＭ補償器、
３４……３．５ＭＨｚバンドパスフイルタ、３５
……ＦＭ復調器、３６……ＣＣＤ可変遅延線、３
７……クロマ位相変調器、４２……同期信号分離
器、４３，４７……位相比較器、４４……基準同
期信号発生器、４５……加算器、４６……バース
トゲート、５０……加算信号出力制御回路、５１
……切換えスイツチ、５２……振幅検出器、５３
……エラー補償器、５４ａ……２．３ＭＨｚバン
ドパスフイルタ、５４ｂ……２．８ＭＨｚバンド
パスフイルタ、５５ａ，５５ｂ……ＦＭ復調器、
５６ａ，５６ｂ……加算器。 FIG. 1 is a block diagram for explaining the configuration of a disc player device according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining a conventional disc player device. 31...Pickup, 33...FM compensator,
34...3.5MHz band pass filter, 35
...FM demodulator, 36...CCD variable delay line, 3
7...Chroma phase modulator, 42...Sync signal separator, 43, 47...Phase comparator, 44...Reference synchronization signal generator, 45...Adder, 46...Burst gate, 50...Addition Signal output control circuit, 51
...Selector switch, 52...Amplitude detector, 53
...Error compensator, 54a...2.3MHz bandpass filter, 54b...2.8MHz bandpass filter, 55a, 55b...FM demodulator,
56a, 56b...Adder.

Claims

[Claims for Utility Model Registration] (1) A variable delay circuit that corrects a time axis error in a video signal extracted from a modulated signal read from a disk and demodulated, and a clock pulse generator that controls the delay time of this variable delay circuit. and separating a horizontal synchronization signal and a color burst signal from the video signal from the variable delay circuit to determine the phase difference between the horizontal synchronization signal and a reference synchronization signal from a synchronization signal generator and the color burst signal and the synchronization signal generator. a time-base error correction circuit that controls the clock frequency of the clock pulse generator by an addition signal of a phase difference with the output of the clock pulse generator; an addition circuit that adds signals to remove low-frequency component noise; and detects a synchronization established state between the time axis error correction circuit and outputs the addition signal to the audio signal system addition circuit when synchronization is established. What is claimed is: 1. A disc player device comprising: an addition signal output control circuit; (2) The addition signal output control circuit detects the synchronization established state of the time axis error correction circuit when the amplitude of the addition signal from the time axis error correction circuit is smaller than a reference amplitude. 2. A disc player device according to claim 1.