Best wavelet packet bases in a rate-distortion sense
نویسندگان
چکیده
منابع مشابه
Best wavelet-packet bases for audio coding using perceptual and rate-distortion criteria
This paper presents a new approach to the adaptation of a wavelet filterbank based on perceptual and rate-distortion criteria. The system makes use of a wavelet-packet transform where each subband can have an individual time-segmentation. Boundary effects can be avoided by using overlapping blocks of samples and therefore switching bases is possible at every tree-level without affecting other s...
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De la recherche p etroli ere a la g eometrie des espaces de Banach en passant par les paraproduits, preprint, Ecole Polytechnique, Palaiseau, Seminaire equations aux d eriv ees partielles (1985{1986).
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Compression of speech from the TIMIT corpus was investigated for several transform domain methods coding near-best and best bases from cosine and wavelet packet transforms. Satisficing (suboptimizing) search algorithms for selecting near-best bases were compared with optimizing algorithms for best bases in these adaptive tree-structured transforms. Experiments were performed on several hundred ...
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Top-down tree search algorithms with non-additive information cost comparisons as decision criteria have recently been proposed by Taswell for the selection of near-best bases in wavelet packet transforms. Advantages of top-down non-additive near-best bases include faster computation speed, smaller memory requirement, and extensibility to biorthogonal wavelets in addition to orthogonal wavelets...
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A fast rate-distortion (R-D) optimized wavelet packet (WP) transform is proposed for image compression in this research. By analyzing the R-D performance of the quantizer and the entropy coder, we show that the coding distortion D can be modeled as an exponentially decaying function as the coding rate R increases. With this exponential R-D model, it is proved that the constant R-D slope criteri...
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ژورنال
عنوان ژورنال: IEEE Transactions on Image Processing
سال: 1993
ISSN: 1057-7149
DOI: 10.1109/83.217221