Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-09-08
1992-03-24
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 9535
Patent
active
050993143
ABSTRACT:
A luminance signal/color signal separation circuit comprises a bandpass filter which separates a first color signal partially including a luminance signal component from a composite image signal, a delay circuit which delays the first color signal to obtain a second color signal, a logic circuit which outputs a luminance component signal from the first color signal and the second color signal, a first adder/subtracter which extracts a third color signal free from the luminance signal component by combining the luminance component signal and the first color signal, and a second adder/subtracter which extracts luminance signal by combining the third color signal and the composite image signal. Another luminance signal/color signal separation circuit comprises a wide range bandpass filter which separates a first color signal from a composite image signal, a delay circuit which delays the first color signal to obtain a second color signal, a logic circuit which outputs color signal with a wide range or with a reduced level is response to the degree of vertical correlation of pictures, and an adder/subtracter which outputs a luminance signal. Color signal with a narrow range can be outputted in place of the signal with the reduced level.
Matsuo Yasutoshi
Yamada Hiroshi
Groody James J.
Harvey David E.
Victor Company of Japan Ltd.
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