Combined Spatial and Subband Block Coding of Images

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.

• Type: Conference
• Year: 2000
• Where: ICIP
• Authors: Frederick W. Wheeler, William A. Pearlman
• Keywords: Hybrid Block Coder, ICIP 2000, Image Processing, Spatial Blocks, Structure Supports Resolution