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Combined spatial and subband block coding of images

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2 Author(s)
Wheeler, Frederick W. ; Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA ; Pearlman, W.A.

This paper describes a low-memory cache efficient hybrid block coder (HBC) for images in which an image subband decomposition is partitioned into a combination of spatial blocks and subband blocks, which are independently coded. Spatial blocks contain hierarchical trees spanning subband levels, and are each encoded using the SPIHT algorithm. Subband blocks contain a block of coefficients from within a single subband, and are each encoded by the SPECK algorithm. The decomposition may have the dyadic or a wavelet packet structure. Rate is allocated amongst the sub-bitstreams produced for each block and they are packetized. The partitioning structure supports resolution embedding. The final bitstream may be progressive in fidelity or in resolution

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Image Processing, 2000. Proceedings. 2000 International Conference on  (Volume:3 )

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