发明名称 |
Digital filter for picture data and digital filter system |
摘要 |
A digital filter for picture data is disclosed which has a first low-pass filter having relatively steep cut-off characteristics for filtering input digital picture data, a second low-pass filter having relatively moderate cut-off characteristics for filtering input digital picture data, a mixing unit for mixing digital picture data filtered by the first and second low-pass filters, a step detecting unit for detecting changes in step-like values of the input picture data, and a control unit for controlling the mixing ratio of the digital picture data from the first and second low-pass filters by the mixing unit based on step detection outputs of the step detection unit. There is also provided a digital filter system for color picture data having the digital filter for each color.
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申请公布号 |
US5638134(A) |
申请公布日期 |
1997.06.10 |
申请号 |
US19950494551 |
申请日期 |
1995.06.26 |
申请人 |
SONY CORPORATION |
发明人 |
KAMEYAMA, TAKASHI;ASAIDA, TAKASHI |
分类号 |
H04N5/14;H04N5/21;H04N9/64;(IPC1-7):H04N5/21 |
主分类号 |
H04N5/14 |
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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