JPH0466885U

JPH0466885U -

Info

Publication number: JPH0466885U
Application number: JP10931090U
Authority: JP
Priority date: 1990-10-18
Filing date: 1990-10-18
Publication date: 1992-06-12

Description

[Brief explanation of the drawing]

第１図は請求項１記載のクロストーク除去回路
の構成図、第２図は磁気テープへの各トラツクの
記録パターンを示す図、第３図は請求項１記載の
クロストーク除去回路の作用説明図、第４図は請
求項２記載のクロストーク除去回路の構成図であ
る。１，２０……クロストーク除去回路、２，２１
，２２……２Ｈ遅延線（２ＨＤＬ）、３，２３，
２４……反転増幅器、４，２５，２６……切換ス
イツチ、５……加算器、２７……相関判別器。 FIG. 1 is a block diagram of the crosstalk removal circuit according to claim 1, FIG. 2 is a diagram showing the recording pattern of each track on the magnetic tape, and FIG. 3 is an explanation of the operation of the crosstalk removal circuit according to claim 1. 4 are configuration diagrams of a crosstalk removal circuit according to a second aspect of the present invention. 1, 20...Crosstalk removal circuit, 2, 21
, 22...2H delay line (2HDL), 3, 23,
24...Inverting amplifier, 4, 25, 26... Changeover switch, 5... Adder, 27... Correlation discriminator.

Claims

[Claims for Utility Model Registration] (1) A carrier color signal separated from a PAL color video signal is frequency-converted to a low frequency band, and the phase of this low-frequency converted carrier color signal is approximately every other track and every horizontal period. V that records on the recording medium in a predetermined direction in 90 degree increments and reproduces this into the original conveyance color signal.
In the crosstalk removal circuit of the TR, this removal circuit includes a 2H delay line that delays the reproduced low frequency conversion carrier color signal by two horizontal periods, an inverting amplifier that inverts the output signal of this 2H delay line, and this inverting amplifier or the 2H delay line. a changeover switch that selects one of the output signals of the delay line for each reproduction track of the recording medium;
A crosstalk removal circuit comprising: an adder for adding the output signal of the changeover switch to the reproduced low-pass conversion carrier color signal. (2) The carrier color signal separated from the PAL color video signal is frequency-converted to a low frequency band, and the phase of this low-frequency converted carrier color signal is shifted in a predetermined direction by approximately 90 degrees every horizontal period for every other track. V to record it on the recording medium and reproduce it to the original carrier color signal.
In the crosstalk removal circuit of the TR, the removal circuit includes a first 2H delay line that delays the reproduced low-frequency conversion carrier color signal by two horizontal periods, and a first inverting amplifier that inverts the reproduced low-frequency conversion carrier color signal. , said first
a second 2H delay line that delays the output signal of the 2H delay line by two horizontal periods; a second inverting amplifier that inverts the output signal of the second 2H delay line; and the first and second inverting amplifiers. first and second changeover switches for selecting an output signal for each reproduction track of the recording medium, and a correlation between the output signal of the first 2H delay line and the output signals of the first and second changeover switches. A crosstalk removal circuit comprising a correlation discriminator for discriminating. (3) The crosstalk removal circuit according to claim 1 or 2, wherein the crosstalk removal circuit outputs the dubbing signal after removing crosstalk from the reproduced low-frequency conversion carrier color signal.