H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/12 (2006.01) G06T 7/20 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/36 (2006.01) H04N 7/50 (2006.01)
Patent
CA 1235794
ABSTRACT A video signal coding apparatus includes a motion detec- tor for detecting a motion contained in the video signal to deliver a motion vector and an inter-frame prediction coder for coding the video signal in response to the motion vector. An intra-frame coder is also present in the apparatus for coding the video signal by using a spatial correlation of the video signal for refresh operation and a control circuit is provided for alternatively selecting the inter-frame prediction coder and the intra-frame coder to code the video signal. Finally a motion compensation inhibiting circuit inhibits the operation of the motion detector for a predetermined period with respect to an area where the re- fresh operation has been completed. The invention permits errors to be removed by the refresh operation which is an improvement over existing systems which employ motion compensation.
471838
Corporation Nec
Smart & Biggar
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