Apparatus for recording and/or reproducing HDTV signals

Details Apparatus for recording and/or reproducing HDTV signals Apparatus for recording and/or reproducing HDTV signals

1993-03-03

1994-04-12

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

348491, 348441, 348390, H04N 979

Patent

active

053030605

ABSTRACT:
An HDTV signal (dot density: 2N dots/line) is converted into a luminance signal and a line sequential color signal, and the resulting signals are both subjected to vertical interpolation and vertical filtering to derive a sequential scanning luminance signal and a sequential scanning color signal. The resulting sequential scanning luminance signal and sequential scanning color signal are subjected to frame thinning to reduce the frequency thereof to a half. Then, subsampling is performed to reduce the dot density to N dots/line. Next, dot rearranging for distributing adjacent dots to adjacent lines is performed to double the number of frames, whereby the dot density of each frame is reduced to N/2 dots/line. These consequently derived frames are encoded for recording. In this manner, the frequency bandwidth required to a recording medium for recording HDTV signals can be reduced.

REFERENCES:
patent: 4866519 (1989-09-01), Lucas et al.
patent: 5031040 (1991-07-01), Maruyama
patent: 5072296 (1991-12-01), Lim
patent: 5159460 (1992-10-01), Senso

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