Differential gain and differential phase compensator circuit of

Details Differential gain and differential phase compensator circuit of Differential gain and differential phase compensator circuit of

1983-11-16

1987-10-13

Psitos, Aristotelis M.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 27, 358318, H04N 9491

Patent

active

047002395

ABSTRACT:
A method for recording a video signal having luminance and chrominance signals by using a plurality of rotary transducing heads on a recording tape moved longitudinally by a drive mechanism, in which the time axis of the video signal is extended as long as N times, the time axis expanded video signal is divided to N channels, and first and second pilot signals having a predetermined frequency are alternately inserted into a predetermined position of a horizontal blanking period of the divided video signal. In this case, the DC voltage level of the first and second pilot signals is selected near the white peak level and near the black level respectively.
An apparatus for recording a video signal having luminance and chrominance signals on a recording tape is also disclosed which includes a circuit for expanding the time axis of the video signal, a divider for dividing the expanded video signal into a plurality of channel video signals, a circuit for producing first and second pilot signals having a predetermined frequency and DC voltage level, the DC voltage level of the first and second pilot signals being different each other and an adding circuit for adding said first and second pilot signals alternately in the horizontal blanking period of the plurality of channel video signals respectively.

REFERENCES:
patent: 3702374 (1972-11-01), Numakura
patent: 3949414 (1976-04-01), Hayashi
patent: 4223338 (1980-09-01), Tamaru et al.
patent: 4356506 (1982-10-01), Yamamitsu
patent: 4394412 (1983-07-01), Tatami
patent: 4400742 (1983-08-01), Yamamitsu et al.
patent: 4475133 (1984-10-01), Kimura
patent: 4480272 (1984-10-01), Horstmann
patent: 4533961 (1985-08-01), Shibata et al.
Translation of DT 2908501, Sep. 11, 1980.

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