Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1986-10-06
1988-08-09
McElheny, Jr., Donald
Facsimile and static presentation processing
Facsimile
Recording apparatus
358330, H04N 980
Patent
active
047632020
ABSTRACT:
A time division multiplex video tape recorder has a channel for receiving the main portion of an incoming video signal, comprising the luminance signal and horizontal synchronization pulse, and a separate channel for receiving the modulated sub-carrier portion of the video signal, comprising the chrominance signal. The luminance channel includes a signal processor for separating the luminance signal and horizontal synchronization pulse from one another. The signal processor removes the horizontal synchronization pulse from the luminance channel and inserts it into the chrominance channel. The luminance signal of each horizontal video line is time-compressed by itself into a first time segment, while the horizontal sync pulse and the chrominance signal of the same horizontal line are time-compressed together into a second time segment, the two segments being recorded serially within the space of one horizontal line scan period. The removal of the horizontal sync pulse from the luminance channel facilitates a decrease in the time compression ratio of the luminance signal and of the time-compressed luminance bandwidth so as to avoid the magnetic tape-to-head interaction cut-off frequency, thereby providing an improvement in overall image quality.
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Eastman Kodak Company
McElheny Jr. Donald
Wallace Robert M.
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