JPS58147367U

JPS58147367U - Video signal recording and reproducing circuit

Info

Publication number: JPS58147367U
Application number: JP4503982U
Authority: JP
Inventors: 高行佐々木
Original assignee: ソニー株式会社
Priority date: 1982-03-30
Filing date: 1982-03-30
Publication date: 1983-10-04

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図は従来のノイズ低減対策を説明するためのブロ
ック回路図、第２図および第３図は本考案の一実施例と
しての映像信号の記録再生回路を示し、第２図は記録系
の概略的なブロック回路図、第３図は再生系の概略的な
ブロック回路図、第４図は第２図の回路の動作を説明す
るための周波数特性図、第５図は第３図の回路の動作を
説明するための周波数特性図である。１０・・・・・・記録側ノイズ低減回路部、２０・・・
・・・再生側ノイズ低減回路部、１１．２１・・・・・
・入力端子、１２．２２・・・・・・出力端子、１３．
　１？、　２３゜２７・・・・・・加算器、１４．　１
Ｂ、　　２４．　２８・・・・・・バイパスフィルタ、
１５．２５・・・・・・垂直相関検出回路部、１６．２
６・・・・・・１．Ｈ（１水平期間）遅延素子。- Fig. 1 is a block circuit diagram for explaining conventional noise reduction measures, Figs. 2 and 3 show a video signal recording/reproducing circuit as an embodiment of the present invention, and Fig. 2 shows a recording system. Figure 3 is a schematic block circuit diagram of the reproduction system, Figure 4 is a frequency characteristic diagram for explaining the operation of the circuit in Figure 2, and Figure 5 is a diagram of the circuit in Figure 3. FIG. 3 is a frequency characteristic diagram for explaining the operation of the circuit. 10... Recording side noise reduction circuit section, 20...
...Playback side noise reduction circuit section, 11.21...
・Input terminal, 12.22...Output terminal, 13.
1? , 23°27...Adder, 14. 1
B, 24. 28... Bypass filter,
15.25... Vertical correlation detection circuit section, 16.2
6...1. H (1 horizontal period) delay element.

Claims

[Scope of utility model registration request]

The high-frequency component of the input video signal is extracted, vertical correlation is detected, and this detection output is subtracted from the input video signal through a limiter circuit and recorded.The high-frequency component of the reproduced video signal is extracted. A video signal recording and reproducing circuit that detects a vertical relationship and adds this detection output to the reproduced video signal via a limiter circuit to reduce noise mixed in during recording and reproduction.