Image analysis – Image compression or coding – Interframe coding
Patent
1997-07-18
2000-01-04
Johns, Andrew W.
Image analysis
Image compression or coding
Interframe coding
348416, 348402, G06K 936, H04N 712
Patent
active
060118709
ABSTRACT:
A digital signal processor encodes video signals per MPEG standard to achieve multi-stage, low-complexity motion estimation for interframe video coding. A dual-stage motion prediction module processes a compressed bitstream through pixel-averaging, and then applies a Sum-Of-Absolute-Difference (SOAD) function to the bitstream. A minimum motion vector signal is thereby generated over a search range initially for rough determination, then to provide a more refined estimation, the SOAD function is re-applied to the surrounding 16.times.16 blocks, preferably by full and half-pel vertical and horizontal offsets.
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Chen Cheng-Tie
Chen Ting-Chung
Jeng Fure-Ching
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