发明名称 |
Method and system for polyphase filtering by combining IIR and FIR filters and its applications in video scaling |
摘要 |
Methods and systems for achieving high sub-pixel precision while processing a video signal are provided. Aspects of the method may include selecting IIR filter coefficients for implementing an IIR filter for filtering a video signal during scaling. Polyphase filter coefficients may be selected for implementing a polyphase filter for filtering the video signal during the scaling. The video signal may be filtered using a combination of the IIR filter having the selected IIR filter coefficients and the polyphase filter having the selected polyphase filter coefficients. The polyphase filter coefficients may implement a finite impulse response (FIR) filter for filtering the video signal. The video signal may be phase-shifted. The scaling of the video signal may comprise upscaling or downscaling the video signal. The video signal may be converted from a first format to a second format by combined IIR-filtering and polyphase filtering.
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申请公布号 |
US2005196072(A1) |
申请公布日期 |
2005.09.08 |
申请号 |
US20040980200 |
申请日期 |
2004.11.03 |
申请人 |
ZHONG SHENG |
发明人 |
ZHONG SHENG |
分类号 |
H04N5/21;(IPC1-7):H04N5/21 |
主分类号 |
H04N5/21 |
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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