Method for distributing and recording video signals and an appar

Details Method for distributing and recording video signals and an appar Method for distributing and recording video signals and an appar

1985-07-25

1988-04-12

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358314, 358327, H04N 986

Patent

active

047378638

ABSTRACT:
Video signal components including the luminance and color signals are sampled using a clock generator and dividers, and the resultant signals are coded through a plurality of channels and are recorded in a video tape recorder. In order to suppress and disperse in the screen image the effect of an error or a dropout occurring in a channel during a recording/playback process, the coded pixels are distributed to each channel so as to uniformly disperse the pixels associated with each component in the screen image. For this purpose, the pixels on a line perpendicular to the scanning lines on the screen are extracted sequentially from a different channel; consequently, even if a failure takes place in a channel, the erroneous pixel can thus be compensated for by use of the correct pixel just above or below the erroneous pixel. The coded pixels are subjected to a bit reversion or complementing to be conducted on every second pixel, and the direct current component of the obtained signals is suppressed, then the resultant signals are recorded on a recording medium.

REFERENCES:
patent: 4277807 (1981-07-01), Baldwin
patent: 4329708 (1982-05-01), Yamamoto et al.
patent: 4419687 (1983-12-01), Dischert et al.
patent: 4590522 (1986-05-01), Takemoto et al.
patent: 4622598 (1986-11-01), Doi et al.
patent: 4638380 (1987-01-01), Wilkinson et al.

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