JPS6134608U

JPS6134608U - Audio recording method in VTR

Info

Publication number: JPS6134608U
Application number: JP11887684U
Authority: JP
Inventors: 英夫松本
Original assignee: シャープ株式会社
Priority date: 1984-07-31
Filing date: 1984-07-31
Publication date: 1986-03-03

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]

第１図は、本考案に係るＶＴＲのブロック図である。第２図Ａは、本考案による音声信号と準搬送波の記録と
タイミングを図式的に示す断面図である。第２図Ｂは、再生時のヘッドアンプの出力のレベルを示
す図である。第３図は、音声ヘッドと映像ヘッドとによる記録を示す
図式的な断面図である。第４図は、従来の音声再生回路のブ七ツク図である。第５図Ａは、テープへの音声信号と映像信号との記録を
示すテープの図式的な断面図である。第５図Ｂは、第５図Ａに示した音声信号爬録の！生ヘッ
ドアンプの出力信号の波形図である。第６図Ａは、テープへの音声信号と映像信号との記録を
示すテープの図式的な断面図である。第６図Ｂは、第６図Ａに示した音声信号記録の再生ヘッ
ドアンプの出力信号の波形図である。１・・・音声ヘッド、２・・・テープ、３・・・磁性層
、３ａ・・・音声信号の記録された部分、３ｂ・・・映
像信号の記録された部分、３ｃ・・・準搬送波が記録さ
れた部分、４・・・映像ヘッド。FIG. 1 is a block diagram of a VTR according to the present invention. FIG. 2A is a cross-sectional view schematically illustrating the recording and timing of audio signals and subcarriers according to the present invention. FIG. 2B is a diagram showing the output level of the head amplifier during reproduction. FIG. 3 is a schematic cross-sectional view showing recording by an audio head and a video head. FIG. 4 is a block diagram of a conventional audio reproduction circuit. FIG. 5A is a schematic cross-sectional view of a tape showing the recording of audio and video signals onto the tape. FIG. 5B shows the recording of the audio signal shown in FIG. 5A! FIG. 3 is a waveform diagram of an output signal of a raw head amplifier. FIG. 6A is a schematic cross-sectional view of a tape showing the recording of audio and video signals onto the tape. FIG. 6B is a waveform diagram of the output signal of the reproduction head amplifier for audio signal recording shown in FIG. 6A. DESCRIPTION OF SYMBOLS 1... Audio head, 2... Tape, 3... Magnetic layer, 3a... Portion where audio signal is recorded, 3b... Portion where video signal is recorded, 3c... Quasi-carrier wave The part where is recorded, 4... video head.

Claims

[Claims for Utility Model Registration] An audio signal and a video signal are respectively recorded on the deep layer and the surface layer of the magnetic layer of the tape, and the recording of the audio signal and the recording of the video signal are performed at an arbitrary time and at an arbitrary time. In the audio recording method of a VTR that can be performed at a location, when the audio signal only recording mode is selected, the video head records the frequency near the carrier wave of the video signal (hereinafter referred to as subcarrier wave), and the audio signal In a VTR, the timing of recording both the signals and the subcarrier wave is set such that recording of the subcarrier wave starts first when recording starts, and recording of the audio signal ends first when recording ends. Audio recording method.