H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/50 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/36 (2006.01) H04N 7/46 (2006.01)
Patent
CA 2160087
The invention relates to a process for the differential coding of a motion vector (MV0) associated with a macro-block (M0). This process comprises the steps: determining the components (MV0x, MV0y) of the said motion vector (MV0), determining a prediction vector, each component (Px, Py) of which is equal to the median value of the corresponding components of at least three candidate motion vectors (MV1, MV2, MV3), a candidate motion vector being a vector associated with a previously coded macro-block , subtracting the components thus obtained from the components of the vector to be coded. The invention also relates to a process for decoding motion vectors coded in the manner described above, as well as to the implementation devices. The invention applies to the field of image compression.
Fetherstonhaugh & Co.
Thomson Multimedia S.a.
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