JPS6088667U

JPS6088667U - video tape recorder

Info

Publication number: JPS6088667U
Application number: JP17933583U
Authority: JP
Inventors: 田渕　潤一郎
Original assignee: 三洋電機株式会社
Priority date: 1983-11-19
Filing date: 1983-11-19
Publication date: 1985-06-18

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 drawings]

図面はこの考案のビデオテープレコーダの１実施例を示
し、第１図はヘッド配置の説明図、第２図ａ〜ｉは動作
説明用タイミングチャート、第３図は一部の回路ブロッ
ク図、第４図および第５図ａ、　ｂはそれぞれヘッドト
レースの説明図である。１．２・・・・・・主回転ビデオヘッド、３・・・・・
・副回転　　　′ビデオヘッド、４，７，８・・・・・
・ヘッドアンプ、５・・・・・・切換スイッチ、６・・
曲ビデオ回路、９．１０・・・・・・振幅検波回路、１
１・・・・・・引き算器、１２・・・・・・コンパレー
タ、１３・・・・・・モノマルチ。The drawings show one embodiment of the video tape recorder of this invention, with FIG. 1 being an explanatory diagram of the head arrangement, FIGS. 2 a to i being timing charts for explaining the operation, and FIG. 3 being a partial circuit block diagram. FIG. 4 and FIGS. 5a and 5b are explanatory diagrams of head tracing, respectively. 1.2... Main rotating video head, 3...
・Sub-rotation 'Video head, 4, 7, 8...
・Head amplifier, 5... Selector switch, 6...
Song video circuit, 9.10... Amplitude detection circuit, 1
1...Subtractor, 12...Comparator, 13...Mono multi.

Claims

[Scope of utility model registration request]

In a pilot tracking type video tape recorder, a pair of main rotating video heads are provided at opposing positions on a head cylinder and have mutually opposite azimuths, and a pair of main rotating video heads are provided near the main rotating video head on one of the head cylinders. , the sub-rotating video head having the azimuth of the other main rotating video head, and the one said one in synchronization with the head switching pulse signal during the tape running period during intermittent slow-motion playback, in which the tape runs and stops alternately. The main rotary video head and the sub rotary video head are simultaneously driven in advance and the other main rotary video head is alternately driven, and during the tape stop period during the intermittent slow motion playback, the head is means for alternately driving the reproduction of the auxiliary rotary video head and the other main rotary video head in synchronization with a switching pulse signal; and means for forming a playback screen by a playback signal of the sub-rotary video head and a playback signal of the other main rotary video head during the tape stop period, and a playback screen of the sub-rotation video head during the tape stop period. means for forming an activation start timing signal based on the head switching pulse signal during driving;
means for running the tape based on the activation start timing signal; means for forming a reference signal whose level increases linearly during the simultaneous playback; and a playback signal for the one main rotating video head during the simultaneous playback. means for outputting a detection signal proportional to a level difference between reproduction signals of the sub-rotating video head; and detecting a braking start timing based on detecting a match between the levels of the reference signal and the detection signal;
means for forming a braking start timing signal; and means for stopping the running of the tape based on the braking start timing signal; A video tape recorder that stops the tape at an appropriate position regardless of the situation.