Television – Bandwidth reduction system – Data rate reduction
Patent
1996-04-08
1998-05-05
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348416, 348699, H04N 730, H04N 732
Patent
active
057482470
ABSTRACT:
Refinement of motion block motion vectors to achieve a dense motion field for temporal video signal processing makes use of candidate motion vectors from a parent block and neighboring child block groups to determine the motion vector for a child block within one of the child block groups. The vicinity of each candidate motion vector may be searched to obtain a trial motion vector having a minimum displaced frame difference measure, with the trial motion vector with the minimum displaced frame difference measure from among all the trial motion vectors being the motion vector for the child block. Alternatively each candidate motion vector may be applied to the child block, and the vicinity of the candidate motion vector having the minimum displaced frame difference being searched to obtain the motion vector for the child block. If the minimum displaced frame difference is not less than a given threshold, the child block is segmented and the process repeated until the child block size is a single pixel or the minimum displaced frame difference is less than the threshold.
REFERENCES:
patent: 5228098 (1993-07-01), Crinon et al.
patent: 5557341 (1996-09-01), Weiss et al.
patent: 5561475 (1996-10-01), Jung
Chin Tommy P.
Gray Francis I.
Tektronix Inc.
Thanh Diep Nhon
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