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Filter for reducing a noise component of a chrominance signal and chrominance signal noise component reducing method
Filter for reducing a noise component of a chrominance signal and chrominance signal noise component reducing method
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机译:用于降低色度信号的噪声成分的滤波器和色度信号的噪声成分降低方法
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摘要
Luminance data Y(1) (i=1,2, - - - ,n, - - - ) are input one by one to a detecting unit, and luminance correlation information R(i-1,i) denoting a luminance correlation or a luminance non-correlation between the luminance data Y(i) and Y(i-1) are generated. Four pieces of luminance correlation information R(n-1,n) to R(n+2,n+3) are stored in a filter controlling unit. Also, chrominance data C(i) are input one by one to a starting-stage chrominance data generating unit, and starting-stage chrominance data C1(n+2) is generated from the chrominance data C(n+1), C(n+2) and C(n+3) according to the luminance correlation information R(n+ 1,n+2) and R(n+2,n+3). other starting-stage chrominance data C1(n) and C(n+1) are generated in advance in the same manner. Second-stage chrominance data C2(n+1) is generated from the starting-stage chrominance data C(n), C(n+1) and C(n+2) in a second-stage chrominance data generating unit according to the luminance correlation information R(n,n+ 1) and R(n+1,n+2). Also, other second-stage chrominance data C2(n-1) and C2(n) are generated in advance in the same manner. Smoothed chrominance data C3(n) is generated from the second-stage chrominance data C(n-1), C(n) and C(n+1) in a final-stage chrominance data generating unit according to the luminance correlation information R(n-1,n) and R(n,n+1). Therefore, each of smoothed chrominance data C3(i) can be generated with a limited number of memories at a high speed.
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