Method and apparatus for efficiently transmitting forced updates

Details Method and apparatus for efficiently transmitting forced updates Method and apparatus for efficiently transmitting forced updates

1992-04-09

1997-07-01

Couso, Yon J.

Image analysis

Image compression or coding

382236, G06K 936

Patent

active

056446608

ABSTRACT:
A method and apparatus for selecting blocks for intraframe encoding in a way which avoids intraframe encoding blocks which have not diverged. An inter-energy value is calculated which represents the approximate number of bits required to encode the block of data using a best interframe encoding technique. An intra-energy value is calculated which represents the approximate number of bits required to encode the block of data using intraframe encoding. The block is transmitted using intraframe encoding if the intra-energy is approximately less than the inter-energy. Otherwise, the block is either a) transmitted using an interframe encoding technique or b) not transmitted, thereby implying that the block from the previous frame in the sequence should be repeated. An encoder determines the number of times K that the block has been interframe encoded since it was last intraframe encoded. A weighting factor w(K) is calculated which decreases with the value of K. A weighted energy value is then calculated by multiplying the intra-energy plus an offset S by the weighting factor w(k). If the weighted energy value is approximately less than the inter-energy value, the block is transmitted using intraframe encoding.

REFERENCES:
patent: 4827338 (1989-05-01), Gerard
patent: 4837618 (1989-06-01), Hatori et al.
patent: 4942465 (1990-07-01), Ohta
patent: 4947248 (1990-08-01), Hienerwadel et al.
patent: 5057918 (1991-10-01), Denoyelle

Affiliated with

Also associated with

Rating

Method and apparatus for efficiently transmitting forced updates 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 efficiently transmitting forced updates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for efficiently transmitting forced updates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-604133