Progressive scan video processor

Details Progressive scan video processor Progressive scan video processor

1984-04-13

1986-11-18

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358140, 358 37, 358166, H04N 701

Patent

active

046239138

ABSTRACT:
A digital video signal processing circuit generates interlaced luminance and chrominance signals from interlaced composite color video signals. The interlaced luminance signal contains vertical detail information without peaking. Each of two progressive scan speed-up processors, controlled to operate in parallel, receives the interlaced luminance and chrominance signals. In each of the speed-up processors, the chrominance signals are time compressed and repeated to generate two lines of time compressed chrominance video for each line of interlaced chrominance video. Furthermore, in each of the speed-up processors, a vertical detail signal is regenerated that contains vertical detail information derived from the interlaced luminance signal. The vertical detail signal is nonlinearly processed to generate a vertical peaking signal that is combined with the vertical detail signal. A time compression stage speeds up the peaked vertical detail signal to a double line rate. Another time compression stage speed up a luminance signal containing high frequency information. The time compressed peaked vertical detail signal and the time compressed high frequency luminance signal are combined to generate a time compressed enhanced luminance signal, such that alternate lines of the enhanced luminance signal contain vertical peaking information of opposing polarities. The parallel operation of the two speed-up processors is controlled to enable one of the processors to function in the write mode to store samples of the interlaced luminance and chrominance signals while the other speed-up processor functions in the read mode to read out samples of time compressed enhanced luminance and time compressed chrominance signals. The outputs of the two speed-up processors are multiplexed and applied to a color matrix to generate the time compressed lines of noninterlaced red, green and blue signals.

REFERENCES:
patent: 4245237 (1981-01-01), Lagoni
patent: 4415931 (1983-11-01), Dischert
patent: 4558347 (1985-12-01), Pritchard

Affiliated with

Also associated with

Rating

Progressive scan video processor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Progressive scan video processor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progressive scan video processor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1620152