JPS6211244U

JPS6211244U -

Info

Publication number: JPS6211244U
Application number: JP10151485U
Authority: JP
Priority date: 1985-07-03
Filing date: 1985-07-03
Publication date: 1987-01-23

Description

[Brief explanation of the drawing]

第１図は本考案になるビデオテープレコーダの
一実施例の回路構成図、第２図は磁気テープのト
ラツクパターンとその走査を説明するための図、
第３図は第１図示の回路各部の信号波形図、第４
図は第１図示の装置の一部の一実施例の回路図で
ある。１１……帯域フイルタ、１２……検波器、１３
……波形整形回路、１４……Ｆ／Ｖ変換器、１６
，１７……コンパレータ、１８，１９，２１，２
２……ナンド回路、２３……フリツプフロツプ。 FIG. 1 is a circuit diagram of an embodiment of the video tape recorder according to the present invention, and FIG. 2 is a diagram for explaining the track pattern of a magnetic tape and its scanning.
Figure 3 is a signal waveform diagram of each part of the circuit shown in Figure 1.
The figure is a circuit diagram of an embodiment of a portion of the apparatus shown in the first figure. 11...Band filter, 12...Detector, 13
... Waveform shaping circuit, 14 ... F/V converter, 16
, 17... Comparator, 18, 19, 21, 2
2...NAND circuit, 23...Flip-flop.

Claims

[Scope of utility model registration request]

A plurality of types of pilot signals having mutually different frequencies are sequentially switched for each track and recorded on a magnetic tape together with a video signal in a standard mode or a long-time mode in which the tape running speed is slower than the standard mode,
In a video tape recorder that generates a reference pilot signal of the same type as the plurality of types of pilot signals during reproduction, and tracks and reproduces the recording track of the pilot signal of the same type as the reference pilot signal, a single type of signal is selected from the reproduction signal. a detection circuit for detecting the pilot signal of the magnetic tape; and a discrimination circuit for determining whether the signal recorded on the magnetic tape is in the standard mode or the long-time mode from the cycle of the detection signal output by the detection circuit. Tape recorder.