JPS6263809U

JPS6263809U -

Info

Publication number: JPS6263809U
Application number: JP15496285U
Authority: JP
Priority date: 1985-10-07
Filing date: 1985-10-07
Publication date: 1987-04-21

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図はデジタル映像信号を磁気テープの深層部に記
録した状態を示す図、第３図はＰＣＭ音声信号を
磁気テープの表層部に記録した状態を示す図、第
４図はデジタル映像信号およびＰＣＭ音声信号の
スペクトルを比較して示す図、第５図は映像信号
をデジタル信号に変換してメモリに書込む様子を
説明するための図、第６図および第７図はＰＣＭ
音声信号の記録パターンを示す図である。１……磁気テープ、２ａ，２ｂ……先行磁気ヘ
ツド、３ａ，３ｂ……後続磁気ヘツド、４，５…
…第１、第２メモリ、６……第１制御処理手段、
７……第２制御処理手段。 Fig. 1 is a block diagram of an embodiment of the present invention;
The figure shows a state in which a digital video signal is recorded in the deep layer of a magnetic tape, FIG. 3 shows a state in which a PCM audio signal is recorded in a surface layer of a magnetic tape, and FIG. 4 shows a digital video signal and PCM audio. Figure 5 is a diagram showing a comparison of signal spectra. Figure 5 is a diagram explaining how a video signal is converted into a digital signal and written into memory. Figures 6 and 7 are PCM.
FIG. 3 is a diagram showing recording patterns of audio signals. 1... Magnetic tape, 2a, 2b... Leading magnetic head, 3a, 3b... Following magnetic head, 4, 5...
...first and second memories, 6...first control processing means,
7...Second control processing means.

Claims

[Claims for Utility Model Registration] A pair of leading magnetic heads for recording or reproducing digital video signals as still image information in the deep layer of a magnetic tape; ) a pair of subsequent magnetic heads for recording or reproducing the recorded audio signal on the surface portion of the magnetic tape; a memory capable of writing or reading at least one field's worth of digital video signal; digitizing a minute-by-minute video signal, writing this digital video signal into the memory, and recording it as still image information in the deep part of the magnetic tape by the preceding magnetic head at a recording speed lower than the writing speed;
At the time of reproduction, a first control processing means writes the reproduction output from the preceding magnetic head into the memory, and repeatedly reads the contents of this memory for a predetermined period of time to reproduce and output the still image information; and at the time of recording, the audio signal is pulse-code modulated and recorded on the surface layer of each divided area formed by dividing one track of the magnetic tape into a plurality of parts by the succeeding magnetic head. During playback, the reproduced output from the succeeding magnetic head is demodulated to produce an audio signal. A video tape recorder comprising second control processing means for outputting.