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Proceedings Paper

Effective half-pel motion compensation and estimation scheme for digital video
Author(s): Michael Bakhmutsky; Karl Wittig
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Paper Abstract

Half-pel motion compensation, unlike its full-pel counterpart, requires the availability of up to four pixels from the reference picture to generate each compensated pixel. To compensate a 16 X 16 macroblock, a 17 X 17 array of pixels is needed. The number of memory access cycles necessary to process a macroblock, if half-pel motion compensation is employed, is greater than the number otherwise needed by 33, or 13% of the macroblock size. In some motion prediction modes, two 17 X 9 pixel arrays are used, and the number of additional cycles increases to 50, or 20% of the macroblock size. This affects the timing requirements for digital video decoding. In particular, a clock frequency higher than the pixel rate is required, as is buffering for pixel data to convert between the two rates. This paper considers the above problem and presents a method of reference picture memory access that eliminates the additional processing time required for half-pel motion compensation.

Paper Details

Date Published: 21 December 1998
PDF: 11 pages
Proc. SPIE 3655, Media Processors 1999, (21 December 1998); doi: 10.1117/12.334762
Show Author Affiliations
Michael Bakhmutsky, Philips Research (United States)
Karl Wittig, Philips Research (United States)

Published in SPIE Proceedings Vol. 3655:
Media Processors 1999
Sethuraman Panchanathan; Subramania I. Sudharsanan; V. Michael Bove, Editor(s)

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