Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Reexamination Certificate
2006-09-12
2006-09-12
Ometz, David (Department: 2622)
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
C348S627000, C348S688000, C348S683000, C382S264000, C382S266000, C358S003270
Reexamination Certificate
active
07106386
ABSTRACT:
A picture quality improvement device has two-dimensional low-pass filter that takes as input a luminance signal YIN that is obtained from a video signal and that extracts low-pass components for a vertical direction and a horizontal direction of the input luminance signal YIN. The picture quality improvement device adds an edge signal, which is obtained by subtracting from luminance signal YIN the low-pass extraction signal (LPF) that has been extracted by two-dimensional low-pass filter, to luminance signal YIN. Two-dimensional low-pass filter is constituted such that the extraction gain of the vertical direction low-pass component and the extraction gain of the horizontal direction low-pass component are independently adjusted.
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Desir Jean W.
NEC Viewtechnology Ltd.
Ometz David
Sughrue & Mion, PLLC
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