Video compression coding and decoding with automatic sub-pixel f

Details Video compression coding and decoding with automatic sub-pixel f Video compression coding and decoding with automatic sub-pixel f

1993-03-15

1996-01-30

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348417, 348699, H04N 7133, H04N 7137

Patent

active

054884195

ABSTRACT:
An input frame to be motion compensated is partitioned into smaller blocks of pixel data. First, motion estimation is performed on each block in full-pixel resolution. Then, full-pixel resolution motion vector is refined to half-pixel accuracy by searching the surrounding half-pixel resolution blocks in vertical and horizontal positions with respect to the full-pixel resolution motion vector. An absolute magnitude of a horizontal component of the full-pixel resolution motion vector is examined to see if it is greater or less than a predetermined threshold to detect any significant movement. If the horizontal component absolute magnitude is less than the threshold, a frame-based interpolation will be used for forming the sub-pixel resolution block. If the horizontal component absolute magnitude is greater than the threshold, a field-based interpolation will be used instead. The sub-pixel resolution block is subjected to motion estimation and compensation to obtain a predicted block which will then be coded to obtain a coded bit stream.

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patent: 5073820 (1991-12-01), Nakagawa et al.
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patent: 5150432 (1992-09-01), Ueno et al.
Signal Processing of HDTV, II 1989, Turin, IT, pp. 131-137 XPOOO215234, Ziegler, "Hierarchical Motion Estimation Using The Phase Correlation Method In 140 MBIT/S HDTV-Coding".
Fujitsu-Scientific and Technical Journal, vol. 22, No. 4, 1986, Kawasaki JP pp. 335-366, Tsuda et al., "Efficient Video Bandwidth Compression".
"Proposal Package", ISO-IEC/JTC1/SC29/WG11, MPEG 91/228, 1991.

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