Television – Bandwidth reduction system – Data rate reduction
Patent
1995-02-01
1997-01-21
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 732
Patent
active
055963706
ABSTRACT:
An apparatus for determining a motion vector representing a displacement between a current frame and a previous frame of video signals comprises an error detector for comparing the error functions calculated from block matching sections to each other and selecting M number error functions in the order of their magnitude beginning from a smallest, a displacement vector selector for selecting M number of displacement vectors from displacement vectors generated from candidate block formation sections, a candidate block selector for selecting M number of candidate blocks, M number of boundary matching sections for generating M sets of boundary differences, M number of comparison and counting sections for comparing boundary differences in one of the M sets of boundary differences with a predetermined value, to count the number of the boundary differences having a value larger than the predetermined value; and an optimum motion vector selector for selecting a counted number having a minimum value to determine one of said M number of displacement vectors which corresponds to the selected counted number, as the motion vector for the search block.
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patent: 5036393 (1991-07-01), Samad et al.
patent: 5200820 (1993-04-01), Gharavi
patent: 5327232 (1994-07-01), Kim
patent: 5347311 (1994-09-01), Golin
patent: 5453801 (1995-09-01), Kim
patent: 5481627 (1996-01-01), Kim
C. H. Hsieh et al., "Motion Estimation Algorithm Using Interblock Correlation", Electronics Letters, vol. 26, No. 5, pp. 276-277, Mar. 1990.
J. R. Jain et al., "Displacement Measurement and Its Application in Interframe Image Coding", IEEE Transactions on Communications, COM-29, No. 12, Dec. 1981.
Chin Tommy P.
Daewoo Electronics Co. Ltd.
Tung Bryan S.
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