https://scholars.lib.ntu.edu.tw/handle/123456789/296567
標題: | VLSI implementation of shape-adaptive discrete wavelet transform | 作者: | Tseng, P.-C. Huang, C.-T. LIANG-GEE CHEN |
關鍵字: | Shape-adaptive discrete wavelet transform; VLSI implementation | 公開日期: | 2002 | 卷: | 4671 II | 起(迄)頁: | 655-666 | 來源出版物: | Proceedings of SPIE - The International Society for Optical Engineering | 會議論文: | Visual Communications and Image Processing 2002 | 摘要: | In this paper, several VLSI architectures and implementations of Shape-Adaptive Discrete Wavelet Transform (SA-DWT) with odd symmetric biorthogonal filters are presented. The hardware implementation issues of SA-DWT algorithm are first addressed, and one lifting scheme together with some appropriate shape information processing units is introduced for the 1-D SA-DWT architectures. These architectures can efficiently perform 1-D length-adaptive DWT on continuous line segments and solve the corresponding boundary extension and subsampling problems without any overhead. In addition to 1-D architectures, two 2-D SA-DWT architectures are also proposed. One is the direct method, which uses the 1-D SA-DWT architectures as basis to extend to 2-D SA-DWT by direct row-column approach. The other is the line-based method, which is an efficient and feasible architecture that uses internal line buffers rather than external frame memory. These two 2-D SA-DWT architectures are both VLSI implemented by using cell-based chip design flow. The Daubechies (9,7) filter is used for the implementation by direct method, and the Daubechies (9,3) filter is used for the line-based implementation. The proposed architectures can be applied both in arbitrarily shaped visual objects coding such as MPEG-4 still texture coding and rectangular region image coding such as JPEG2000 still image coding. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036028341&doi=10.1117%2f12.453109&partnerID=40&md5=5e7eddf284779eddbbb504857c952553 http://scholars.lib.ntu.edu.tw/handle/123456789/296567 |
ISSN: | 0277786X | DOI: | 10.1117/12.453109 | SDG/關鍵字: | Adaptive filtering; Algorithms; Computer hardware; Data processing; Data storage equipment; Image coding; Wavelet transforms; Shape-adaptive discrete wavelet transforms (SA-DWT); VLSI circuits |
顯示於: | 電機工程學系 |
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