Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2007-11-13
2007-11-13
An, Shawn S. (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240250, C375S240200, C375S240050, C375S240180, C375S240260, C382S251000, C382S233000, C382S250000, C382S248000, C382S235000
Reexamination Certificate
active
10304950
ABSTRACT:
An image information coding apparatus codes an input image signal in a manner optimized on the basis of the visual characteristics. In quantization, an input image signal is divided into blocks, an orthogonal transform is performed on a block-by-block basis, and resultant orthogonal transform coefficients are quantized. A quantizer includes a weighter for, in the quantization, performing weighting on each component of the orthogonal transform coefficients by means of an addition operation on a parameter specifying one of elements of a series of numbers arranged in accordance with a predetermined rule in correspondence with quantization step sizes.
REFERENCES:
patent: 6385242 (2002-05-01), Chen
patent: 6385247 (2002-05-01), De With et al.
patent: 6445739 (2002-09-01), Shen et al.
patent: 6834080 (2004-12-01), Furukawa et al.
Kuhn Peter
Sato Kazushi
Sunohara Osamu
Suzuki Teruhiko
Takahashi Kuniaki
An Shawn S.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
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