Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Reexamination Certificate
2007-05-29
2007-05-29
Hsia, Sherrie (Department: 2622)
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
C348S713000, C348S708000
Reexamination Certificate
active
10919559
ABSTRACT:
A digital signal processing system and method applied for chroma transition, wherein the method has the acts of: performing a difference process on an original chroma signal C to obtain a first difference signal C′; calculating an absolute value |C′| of the first difference signal C′; performing a difference process on the absolute value |C′| to obtain a second difference signal Ca′; determining whether the second difference signal Ca′ is a positive signal or a negative signal; wherein based on a determined result, an optimized chroma signal is generated by either mixing the original input chroma signal C with a k-delayed chroma signal, or mixing the k-delayed chroma signal C[n−k] with a 2k-delayed chroma signal C[n−2k], where k is a constant.
REFERENCES:
patent: 5416531 (1995-05-01), Gai
patent: 5920357 (1999-07-01), Ohara
patent: 5936682 (1999-08-01), Thomas et al.
patent: 6008862 (1999-12-01), Bellers
patent: 6571224 (2003-05-01), He et al.
Huang Yuan-Hao
Lee Ming-Hsiu
Hsia Sherrie
Kamrath Alan
Kamrath & Associates PA
VXIS Technology Corp.
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