Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2011-01-11
2011-01-11
Czekaj, David (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240260
Reexamination Certificate
active
07869516
ABSTRACT:
Motion estimation uses tally (Population Count) and XOR (or other bit-wise comparison) operations to obtain a block-match measure for reference and predicted blocks to identify motion vectors for use in video compression. The XOR operations can be performed on absolute or relative luminance data. For example, a one-bit-per-pixel representation of a block can indicate for each pixel its luminance relative to a local average luminance. The performance improvement offered by the invention (relative to methods using the absolute value of the differences of absolute luminance values) can more than offset a penalty in block-match accuracy due to loss of information in luminance data reduction and/or the ignoring of bit significance due to the bit-wise comparison.
REFERENCES:
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patent: 7110459 (2006-09-01), Srinivasan
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Le Ruby B.
Morris Dale
Czekaj David
Hewlett--Packard Development Company, L.P.
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