Television – Image signal processing circuitry specific to television – Chrominance signal demodulator
Reexamination Certificate
2007-07-31
2007-07-31
Lee, Michael H. (Department: 2622)
Television
Image signal processing circuitry specific to television
Chrominance signal demodulator
C348S644000
Reexamination Certificate
active
10942897
ABSTRACT:
A color demodulation circuit that can complement an unstable state of an output from an ACC circuit and can obtain stable color-difference outputs, regardless of a burst signal in a chrominance carrier signal. Normally, a selector connects an output from a first multiplier that controls an amplitude of an output from a band-pass filter using an output from the ACC circuit, to a color-difference output demodulation circuit. However, during a period in which there are abrupt changes in the burst signal, for example during a period in which the output from the ACC circuit becomes unstable such as at switching between a state including a burst and a state not including a burst, the selector connects an output from a second multiplier that controls the amplitude of the output from the band-pass filter using an ACC output monitor signal, to the color-difference demodulation circuit.
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Matsumura Toshihiro
Miyashita Kazuya
Lee Michael H.
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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