Comb filter device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkihiro Takeuchi, Masa-aki Kobayashi
Life of this patent
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Abstract
A comb filter device has two operation modes, one mode being a conventional comb filter when input signals have high correlation between sequential lines, and the other mode being a simple amplifier when input signals have low or no line correlation. Therefore, this comb filter has little deterioration of vertical resolution of a television picture.
Claims5
A comb filter device comprising two modes, one mode being that of a comb filter when the level of input signals thereto to be rejected thereby are lower than a predetermined threshold level, and the other mode being that of an amplifier which passes signals to the output when the level of input signals to be rejected is higher than said threshold level.
Dependencies are inferred from the claim text.