Television – Bandwidth reduction system – Data rate reduction
Patent
1993-11-02
1996-01-16
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348420, H04N 736
Patent
active
054852129
ABSTRACT:
In a method and apparatus for producing a signal for transmission to a receiver, a video signal is converted to digital form and the data of sequential frames of the signal are arranged in a plurality of blocks of pixel data that numerically represent visual characteristics of the respective pixels of the frame image. Each block is further organized as a matrix of pixel data. The pixel data of the blocks of a "previous" video frame, and a current video frame, are stored in a memory. A row of each block of the current video signal is compared with the corresponding row of the previous video frame, and a list is made of blocks in which the averages of the pixel data exceed a predetermined threshold. The pixel data of the listed blocks with lossy compression, and is encoded for transmission along with high definition data of a predetermined number of blocks of unchanged data. The data of the "previous" frame stored in memory is updated in memory, to continually store a replica of an image that corresponds to the image that should be currently stored in the receiving station.
REFERENCES:
patent: 5347311 (1994-09-01), Golin
patent: 5392072 (1995-02-01), Rodriguez
"The JPEG Still Picture Compression Standard", Gregory K. Wallace 1991.
Britton Howard W.
Xerox Corporation
LandOfFree
Software video compression for teleconferencing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Software video compression for teleconferencing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Software video compression for teleconferencing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-312925