JPS617182U

JPS617182U - Recording disc playback device

Info

Publication number: JPS617182U
Application number: JP9090984U
Authority: JP
Inventors: 豊竹内
Original assignee: 株式会社東芝
Priority date: 1984-06-20
Filing date: 1984-06-20
Publication date: 1986-01-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案に係る記録円盤再生装門の一実施例を示
すブロック図、第２図は第１図を更に詳細に示した具体
的回路の一例を示す回路薗、第３図は第１図および第２
図の動作を説明するためのタイムチャート、第４図は従
来の記録円盤再生装置の一例を示すブロック図、第５図
は第４図の動作を説明するためのタイムチャートである
。１・・・ターンテーブル、２・・・記録円盤、３・・・
再生針、４・・・信号検出回路、５・・・映像処理回路
、６・・・スケルチ回路、７・・・コントロール回路、
１１・・・信一号切換回路、１２・・・色信号発生回路
、１４．１９・・・スイッチ、１６，１７・・・加算回
路、１６・・・位相シフト回路、１８・・・輝度信号発
生器、２０・・・同期信号発生器、２１・・・制御信号
、２２・・・トラッキング回路、２３・・・フィルタ回
路、２４・・・エンド検出回路、２５．２８−
・・ナンドゲート、２６・・・イジェクトキーイング回
路、、２７・・・セット／リセット回路、２９・・・デ
ィスク取出検知回路、３０・・・再生開始キーイング回
路、１１６，２４３・・・インバータ、１１４，１１５
・・・スイッチング素子、２４，２６。FIG. 1 is a block diagram showing one embodiment of the recording disk reproducing system according to the present invention, FIG. 2 is a circuit diagram showing an example of a specific circuit showing FIG. 1 in more detail, and FIG. Figure 1 and 2
FIG. 4 is a block diagram showing an example of a conventional recording disk reproducing apparatus, and FIG. 5 is a time chart for explaining the operation of FIG. 4. 1...Turntable, 2...Record disc, 3...
Regeneration needle, 4... Signal detection circuit, 5... Video processing circuit, 6... Squelch circuit, 7... Control circuit,
11... Signal switching circuit, 12... Color signal generation circuit, 14.19... Switch, 16, 17... Addition circuit, 16... Phase shift circuit, 18... Luminance signal Generator, 20... Synchronization signal generator, 21... Control signal, 22... Tracking circuit, 23... Filter circuit, 24... End detection circuit, 2 5. 2 8-
... NAND gate, 26... Eject keying circuit, 27... Set/reset circuit, 29... Disk ejection detection circuit, 30... Playback start keying circuit, 116, 243... Inverter, 114, 115
...Switching element, 24, 26.

Claims

[Scope of utility model registration request]

(1) A recording disc having a program area where a video signal is recorded and an end area where an end signal and synchronization signal indicating the end of this program area are recorded is placed on a turntable and played back. A recording disc playback device that can be used includes: a processing circuit that processes a recording and playback signal detected from the recording disc into a signal that can be displayed on a display device; and a color signal that generates a specific color signal based on a reference color subcarrier of a predetermined phase. generating means; a squelch circuit to which the signal from the processing circuit is supplied and which makes the output from the processing circuit into a no-signal state during a period when no signal is detected from the recording disk; a signal passed through the squelch circuit; a signal switching circuit to which a signal from the color signal generating means is supplied and outputting one of these two signals; and means for supplying a control signal for signal selection to the signal switching circuit; The means includes a control means configured to output the color signal from the signal switching circuit when an end signal in the end area is detected or when an operation to end the reproduction is performed, and after the end of the reproduction, the color signal is outputted from the signal switching circuit. A recording disk reproducing device characterized by displaying a specific color signal.

(2) The control means is configured to cause the signal switching circuit to output the output of the squelch circuit when the recording disc is removed during the reproduction period. The recording disk reproducing device described in 2.