H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/62
H04N 9/12 (2006.01) H04N 9/78 (2006.01) H04N 9/79 (2006.01) H04N 9/83 (2006.01) H04N 9/88 (2006.01)
Patent
CA 2016444
A luminance signal/color signal separating circuit comprises a comb filter for Y/C separation. The addition output of the comb filter comprises a luminace signal component, while the subtraction output comprises a color signal component and non-correlation components of a luminace signal. The non-correlation components in the subtraction output are extracted by a trap circuit and added to the addition output of the comb filter. Accordingly, the degradation of vertical direction resolution of reproduced signal will be prevented. Also, under some circumstances, the extracted non-correlation components are previously enhanced before being added to the luminace signal. The noise reduction circuit in reproduction mode shares the above comb filter for color signal separation. When dropout occurs, the color signal in the output of the 1H delay circuit of the comb filter is inverted and separated to be used as a drop out compensation signal.
Ichikawa Yuuichi
Miki Shigeru
Shirai Mitsuzou
Riches Mckenzie & Herbert Llp
Sanyo Electric Co. Ltd.
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