Digital video signal compression

Details Digital video signal compression Digital video signal compression

1990-06-13

1991-06-04

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, H04N 712

Patent

active

050218808

ABSTRACT:
Digital samples of an HDTV video signal are compressed by determining groups each of three successive samples in the video signal lines, the groups in adjacent lines being offset from one another, and transmitting only a first sample in each group. Each of the second and third samples in each group is compared with magnitudes averaged from three adjacent, transmitted, first samples, one in each of the previous, same, and following video signal lines, to determine a closest match. A 2-bit code representing this closest match is transmitted for each of these second and third samples in each group. The groups, and hence the first samples, are offset from one another in adjacent video signal lines, and the sampling frequency is desirably an odd multiple of half the video signal line frequency to offset the sampled pixels in adjacent video signal lines. The invention provides a high compression ratio, which can be further increased by DPCM encoding of the successive first samples.

REFERENCES:
patent: 4320416 (1982-03-01), Dischert et al.
patent: 4396937 (1983-08-01), Reitmeier et al.
patent: 4531151 (1985-07-01), Hentschke
patent: 4622579 (1986-11-01), Starck
patent: 4661862 (1987-04-01), Thompson
patent: 4868654 (1989-09-01), Juri et al.
patent: 4901139 (1990-02-01), Wilkinson et al.
L. Brett Glass, "Digital Video Interactive", Byte, May 1989, pp. 283 to 289.

Affiliated with

Also associated with

Rating

Digital video signal compression does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1030643