三帶自適應(yīng)提升雙正交濾波器組
Three-band Adaptive Biorthogonal Filterbanks via Lifting
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摘要: 該文研究了利用三帶提升方法設(shè)計(jì)三帶自適應(yīng)雙正交的濾波器組。在設(shè)計(jì)中，用子帶編碼增益作為設(shè)計(jì)準(zhǔn)則，從任意一個(gè)濾波器組(標(biāo)準(zhǔn)正交或雙正交)開(kāi)始。通過(guò)有序自適應(yīng)提升方法來(lái)設(shè)計(jì)三帶雙正交濾波器組。最后。給出例子說(shuō)明。當(dāng)選擇一個(gè)合適初始濾波器組時(shí)，子帶碼增益可以得到較大提高。
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關(guān)鍵詞:
- 雙正交濾波器組;子帶碼增益;自適應(yīng)提升
Abstract: Three-channel adaptive biorthogonal filterbanks via lifting scheme aro investi-gated. Using the subband coding gain as the criterion in design, starting from an arbitrary filterbank (orthonormal or biorthogonal), three-channel biorthogonal filterbanks arc designed by the sequential adaptive lifting scheme. Finally, experimental results show that the sub-band coding gains can be improved when an appropriate initial filterbank is chosen. -
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