Method and apparatus employing adaptive filtering for efficiently communicating image sequences
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United States of America Patent
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Dec 27, 1988
Issued Date -
N/A
app pub date -
Mar 21, 1988
filing date -
Jan 7, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for encoding and transmitting a sequence of image frames employ a measure of motion displacement for generating a motion compensated image. The motion compensated image, together with an error signal, provides the receiver with full detail regarding the next frame of a sequence. In some instances, however, the motion displacement data is inaccurate for portions of the next image frame. In those instances, the method and apparatus determine whether filtering of a portion of the motion compensated image provides a lower error energy for the resulting prediction of the image. If a lower error energy can be achieved by low-pass filtering, the data regarding the additional processing of the motion compensated reconstructed image is transmitted to the receiver.
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