发明名称 |
Method and apparatus for encoding and decoding using wavelet-packets |
摘要 |
The disclosure involves the use of a library of modulated wavelet-packets which are effective in providing both precise frequency localization and space localization. An aspect of the disclosure involves feature extraction by determination of the correlations of a library of waveforms with the signal being processed, while maintaining orthogonality of the set of waveforms selected (i.e. a selected advantageous basis). In a disclosed embodiment, a method is provided for encoding and decoding an input signal, such as an audio or video signal, comprising the following steps: applying combinations of dilations and translations of a wavelet to the input signal to obtain processed values; computing the information costs of the processed values; selecting, as encoded signals, an orthogonal group of processed values, the selection being dependent on the computed information costs; and decoding the encoded signals to obtain an output signal.
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申请公布号 |
US5384725(A) |
申请公布日期 |
1995.01.24 |
申请号 |
US19900525973 |
申请日期 |
1990.05.18 |
申请人 |
YALE UNIVERSITY;MEYER, YVES |
发明人 |
COIFMAN, RONALD;MEYER, YVES;WICKERHAUSER, MLADEN V. |
分类号 |
H03M1/12;G06F17/14;G06T9/00;H03M7/30;H04B14/04;H04N1/41;H04N7/26;(IPC1-7):G06G7/00;G06F7/38;G06F15/31 |
主分类号 |
H03M1/12 |
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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