JPS5986009U

JPS5986009U - VTR playback circuit

Info

Publication number: JPS5986009U
Application number: JP18112382U
Authority: JP
Inventors: 浩吉岡; 国吉　保伸
Original assignee: ソニー株式会社
Priority date: 1982-11-30
Filing date: 1982-11-30
Publication date: 1984-06-11
Also published as: JPH0244391Y2

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図はオーディオ信号の記録方式の説明に用いる周波
数スペクトル図、第２図及び第３図は従来のＶＴＲの記
録回路及び再生回路の夫々の構成を示すブロック図、第
４図及び第５図はこの考案の一実施例のヘッド配置及び
記録パターンの説明に用いる路線図、第６図及び第、７
図はこの考案の一実施例における記録回路及び再生回路
の構成を夫々示すブロック図、第８図はこの考案の一実
施　　　。例の動作説明に用いるタイムチャート、第９図はこの考
案の一実施例における検出回路の具体的構成を示すブロ
ック図である。１・・・記録ビデオ信号の入力端子、２．　３．　１３
゜１４・・・フィルタ、６・・・記録オーディオ信号の
入力端子、１５・・・バンドパスフィルタ、１８・・・
ＦＭ復調回路、２２・・・磁気テープ、２３Ａ、２３Ｂ
・・・商転ヘッド、３３・・・ＰＣＭデコーダ、３７・
・・輝度信号再生回路、３９・・・色信号再生回路、４
１・・・再生ビデオ信号の出力端子。Figure 1 is a frequency spectrum diagram used to explain the audio signal recording method, Figures 2 and 3 are block diagrams showing the respective configurations of the recording circuit and playback circuit of a conventional VTR, and Figures 4 and 5. Figures 6 and 7 are route maps used to explain the head arrangement and recording pattern of an embodiment of this invention.
The figure is a block diagram showing the configuration of a recording circuit and a reproducing circuit, respectively, in an embodiment of this invention, and FIG. 8 is an embodiment of this invention. FIG. 9, a time chart used to explain the operation of the example, is a block diagram showing a specific configuration of a detection circuit in an embodiment of this invention. 1... Input terminal for recording video signal, 2. 3. 13
゜14...Filter, 6...Input terminal for recording audio signal, 15...Band pass filter, 18...
FM demodulation circuit, 22...magnetic tape, 23A, 23B
...Commercial head, 33...PCM decoder, 37.
... Luminance signal regeneration circuit, 39 ... Color signal regeneration circuit, 4
1...Output terminal for playback video signal.

Claims

[Scope of utility model registration request]

A first recording method that inserts an audio signal modulated in a frequency band different from the frequency band of the FM-modulated video signal, and a second recording method that records the audio signal in an area of a recording medium different from the recording area of the video signal. A circuit for generating a control signal for distinguishing between the first and second recording methods, a filter for limiting the band of the reproduced FM modulated video signal, and a signal path for bypassing this filter, corresponding to the first recording method. to select the signal appearing at the output of the above filter,
A reproducing circuit for a VTR, comprising a switch circuit controlled by the control signal so as to select a signal passed through the bypass signal path in accordance with the second recording method.