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- W2108092979 abstract "Parallels between orthogonal transforms and filter banks have been drawn before. Block orthogonal transform (BOT) is a special case of orthogonal transform where a nonoverlapping window is used. We relate BOTs to filter banks. Specifically, we show that any BOT can be shown as a perfect reconstruction filter bank, and any tree-structured perfect reconstruction filter bank or any orthonormal filter bank for which no filter length exceeds its decimation factor can be shown as a BOT. We then show that all conventional BOTs map to uniform filter banks. A construction method to design a BOT from any nonuniform filter bank is presented, and finding an optimal tree structure (in the sense of transform coding gain) for a given source is also discussed. The results show that the optimal, nonuniform BOT outperforms uniform BOTs having either the same number of bands or the same size in most cases." @default.
- W2108092979 created "2016-06-24" @default.
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- W2108092979 date "1996-01-01" @default.
- W2108092979 modified "2023-10-16" @default.
- W2108092979 title "BOT's based on nonuniform filter banks" @default.
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- W2108092979 doi "https://doi.org/10.1109/78.533718" @default.
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