Television – Image signal processing circuitry specific to television – Chrominance-luminance signal separation
Reexamination Certificate
2006-05-23
2010-06-01
Hsia, Sherrie (Department: 2622)
Television
Image signal processing circuitry specific to television
Chrominance-luminance signal separation
C348S667000, C348S669000
Reexamination Certificate
active
07728910
ABSTRACT:
The invention relates to a 2D YC separation device and YC separation system for separating a composite signal into a luma signal (Y) and a chroma signal (C). Firstly, the 2D YC separation device utilizes a low-pass filter to separate the composite signal into a low-frequency composite signal and a high-frequency composite signal. The low-frequency composite signal is a low-frequency luma signal. A 2D comb filter is utilized to separate the high-frequency composite signal into a high-frequency luma signal and the chroma signal. The luma signal is equal to the low-frequency luma signal plus the high-frequency luma signal. Therefore, the 2D YC separation device of the present invention can perfectly separate the composite signal so as to obtain a better luma signal and chroma signal. The YC separation system of the present invention further comprises a 3D YC separation device and a motion detection device, so as to obtain a precise luma signal and chroma signal.
REFERENCES:
patent: 6424384 (2002-07-01), Tsyrganovich
patent: 6573940 (2003-06-01), Yang
patent: 7324163 (2008-01-01), Bacche
Himax Technologies Inc.
Hsia Sherrie
Ladas and Parry LLP
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