Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-02-11
1992-08-11
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358135, 358136, 358105, H04N 712
Patent
active
051384477
ABSTRACT:
Digital video signals are processed by a plurality of independently operating processors to provide data for transmission in a compressed, motion compensated form. A video image frame area is divided into a set of subframes. The set of subframes is systematically shifted such that the individual subframes progressively cycle across and wrap around the video image frame area. For each successive video frame, video image data bounded by each of the different subframes is independently compressed using motion estimation to reduce data redundancy among the successive frames. The motion estimation is limited for each subframe of a current video frame to areas of a previous video frame that were bounded by the same subframe in the previous frame. In an illustrated embodiment, the set of subframes is shifted once for each successive video frame, and each subframe includes a refresh region whereby the video image frame area is progressively refreshed as the subframes are shifted thereacross. Receiver apparatus for use in decoding the independently processed subframe data is also disclosed.
REFERENCES:
patent: 4546386 (1985-10-01), Matsumoto et al.
patent: 4651206 (1987-03-01), Ohki
patent: 4707738 (1987-11-01), Ferre et al.
patent: 4731664 (1988-03-01), Nishiwaki et al.
patent: 4816906 (1989-03-01), Kummerfeldt et al.
patent: 4831439 (1989-05-01), Fedele et al.
patent: 4837618 (1989-06-01), Hatori et al.
patent: 4862264 (1989-08-01), Wells et al.
patent: 4887156 (1989-12-01), Ohki
patent: 4888640 (1989-12-01), Acampora et al.
patent: 4897720 (1990-01-01), Wu et al.
patent: 4933759 (1990-06-01), Van der Meer et al.
patent: 4942465 (1990-07-01), Ohta
patent: 4984076 (1991-01-01), Watanabe et al.
patent: 5068724 (1991-11-01), Krause et al.
"Fixed and Adaptive Predictors for Hybrid Predictive/Transform Coding", Ericsson, IEEE Transactions on Communications, vol. COM-33, No. 12, Dec. 1985.
"Scene Adaptive Coder", Chen and Pratt, IEEE Transactions on Communications, vol. COM-32, No. 3, Mar. 1984.
Krause Edward A.
Paik Woo H.
Shen Paul
Burgess Glenton B.
General Instrument Corporation
Groody James J.
Lipsitz Barry R.
LandOfFree
Method and apparatus for communicating compressed digital video does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for communicating compressed digital video , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for communicating compressed digital video will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-351176