Hierarchical segment-based motion vector encoding and decoding

Details Hierarchical segment-based motion vector encoding and decoding Hierarchical segment-based motion vector encoding and decoding

2005-06-21

2005-06-21

Lee, Young (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

06909749

ABSTRACT:
In a method and apparatus for predicting and coding motion vectors in a video compression scheme, an ordered list of segments for a reference frame is used to create a hierarchy of segments with a plurality of levels. Motion vectors for segments in the top level are entropy coded, and these vectors are used to predict vectors for segments at the next level. Residual vectors are entropy coded to correct these predictions, and the process of prediction from above and coding residuals continues recursively down through the hierarchy of segment levels. Information about the previous motion of segments may be exploited in the prediction process. In a complementary method and apparatus for decoding motion vectors, the same segment hierarchy is used to predict motion vectors by the same method used during encoding, and these predicted vectors are added to residual motion vectors to reconstruct the actual motion vectors.

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Prakash, Adityo, et al., “Motion Matching Method”, U.S. Appl. No. 09/912,743, filed Jul. 23, 2001.
Ohm, Jens-Rainer “Motion-Compensated 3-D Subband And Coding With Multiresolution Representation Of Motion Parameters”, paper # ICIP-80 pp. 1-5; Berlin, Germany.

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