Statistical content block matching scheme for pre-processing...

Details Statistical content block matching scheme for pre-processing... Statistical content block matching scheme for pre-processing...

2011-07-19

2011-07-19

Ha, Dac V. (Department: 2611)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240120, C375S240230, C375S240240, C375S240260

Reexamination Certificate

active

07983341

ABSTRACT:
Statistical content block matching for video pre-processing, for example in fast motion estimation, uses a second-order distortion criterion for processing steps such as identifying a best reference image portion for comparison with a current image portion. The second-order distortion criterion is a Lagrange-optimized combination of a mean squared error criterion with an entropy criterion. Then a fast motion estimation search advantageously includes performing a diamond search using the second-order distortion criterion to identify a candidate best reference image portion, and performing a nearest neighbor search starting using said second-order distortion criterion to identify the best reference image portion within a search range limited by an adaptive search range cap. A better motion vector can then be calculated.

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Choi et. al. “Fast motion estimation and mode decision with variable motion block sizes”,2003;visual communications and image processing,vol. 5150,pp. 1561-1572.

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