发明名称 |
Signal separator having function of subsampling digital composite video signal |
摘要 |
A signal separator includes an A/D converter which samples a composite color television signal including a luminance signal component and a color difference signal component at a sampling frequency four times a frequency of a chrominance subcarrier and outputs a digital signal. A timing signal generator receives the digital signal and generates at least first and second timing signals. A subsampling circuit subsamples the digital signal in accordance with the first timing signal and outputs a subsampled signal. A frame delaying circuit delays the subsampled signal by one frame and outputs a delayed signal. The signal separator further includes first interpolation circuit which interpolates the delayed signal in accordance with the second timing signal and outputs a first interpolated signal. A first separator separates the color difference signal component from the composite color television signal by mixing the first interpolated signal and the digital signal. A second interpolation circuit interpolates the color difference signal component by a predetermined signal and outputs a second interpolated signal. A second separator separates the luminance signal component by mixing the first interpolated signal and the second interpolated signal.
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申请公布号 |
US4953009(A) |
申请公布日期 |
1990.08.28 |
申请号 |
US19880288870 |
申请日期 |
1988.12.23 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
YAMADA, MASAHIRO;YASUKI, SEIJIRO;HOSHINO, KIYOSHI |
分类号 |
H04N9/78 |
主分类号 |
H04N9/78 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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