Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-01-18
2005-01-18
Rao, Andy (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240170
Reexamination Certificate
active
06845130
ABSTRACT:
An encoding method for reducing motion video data sizes using a multitude of variable-sized data blocks that are derived from spatial translation vectors and the motion field of an image. Using variable-block sizes to characterize the groups of picture elements (pixels) in an image frame allows for the inter-mixing of coarse (for static areas) and fine (for areas of complex motion) resolution data descriptions in the same descriptive data block.A comparison of motion event areas is made between successive video frames, and a motion displacement vector is calculated for each pixel location in the frame. A data tree is constructed from these pixel motion vectors and is pruned to eliminate static areas. The remaining leaves of the pruned tree are encoded differentially and applied to a lossless arithmetic encoder to provide a significantly reduced data block that still retains the highest resolution of the image.
REFERENCES:
patent: 6345126 (2002-02-01), Vishwanath et al.
patent: 6370196 (2002-04-01), Griessl et al.
patent: 6466623 (2002-10-01), Youn et al.
patent: 6560371 (2003-05-01), Song et al.
Han Soo-Chul
Podilchuk Christine
Lucent Technologies - Inc.
Rao Andy
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