H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/12 (2006.01) G06T 9/00 (2006.01) H04N 7/36 (2006.01)
Patent
CA 1216058
ABSTRACT An apparatus for predictively coding and decoding is disclosed. On the transmitting side, a motion vector contained in an input video signal is detected for each of a number of blocks, each of which consists of a plurality of picture elements and which spans over a plurality of scanning lines as a unit. The motion vector is time-sequentially converted to match the time sequence of the input video signal. A prediction error signal is obtained in response to the input video signal and the converted motion vector. The prediction error signal is time-sequentially converted to have a higher correlation and the converted prediction error signal is coded by variable length coding inclusive of run-length coding and is transmitted. On the re- ceiving side, the converted prediction error signal is decoded. The converted prediction error signal is rearranged into the time sequence of the input video signal. A video signal is predictively decoded in response to the re- arranged prediction error signal and a motion vector which is transmitted from the transmitting side. The apparatus of the invention is capable of efficiently coding a video signal by using spatial correlations of not only a prediction error signal but also a motion detector.
475779
Corporation Nec
Smart & Biggar
LandOfFree
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