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| Signal compression by bitree-search-based wavelet transform |
| Zhang Lei; Pan Quan; Zhang Hongcai; Dai Guanzhong |
| Dept. of Automatic Control Northwestern Poly technical University Xi an 710072 China |
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Abstract ODWT (Orthogonal Discrete Wavelet Transform) is translation-variant, which will depress the compression efficiency. To avoid the deficiency, by holding all the even and odd indexed subsamples in every scale, a bitree structure is formed here. From any route of the bitree the signal can be reconstructed. According to sonic given criterion, a best transform route can be determined. The simulations show that the compression performance of the best transform route is better than that of the ordinary ODWT.
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Received: 16 June 2000
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2002, Vol. 24 
