LLEC: An Image Coder with Low-Complexity and Low-Memory Requirement
PCM '01 Proceedings of the Second IEEE Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Seismic Data Compression Using GenLOT: Towards 'Optimality'?
DCC '00 Proceedings of the Conference on Data Compression
Fast Progressive Image Coding without Wavelets
DCC '00 Proceedings of the Conference on Data Compression
Spectrum flipping for wavelet packet decomposition
MUSP'07 Proceedings of the 7th WSEAS International Conference on Multimedia Systems & Signal Processing
Efficient block-based frequency domain wavelet transform implementations
IEEE Transactions on Image Processing
A two-channel overlapped block transform for image compression
IEEE Transactions on Image Processing
A novel enhancement for hierarchical image coding
Journal of Visual Communication and Image Representation
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This paper presents a novel image coding scheme using M-channel linear phase perfect reconstruction filterbanks (LPPRFBs) in the embedded zerotree wavelet (EZW) framework introduced by Shapiro (1993). The innovation here is to replace the EZWs dyadic wavelet transform by M-channel uniform-band maximally decimated LPPRFBs, which offer finer frequency spectrum partitioning and higher energy compaction. The transform stage can now be implemented as a block transform which supports parallel processing and facilitates region-of-interest coding/decoding. For hardware implementation, the transform boasts efficient lattice structures, which employ a minimal number of delay elements and are robust under the quantization of lattice coefficients. The resulting compression algorithm also retains all the attractive properties of the EZW coder and its variations such as progressive image transmission, embedded quantization, exact bit rate control, and idempotency. Despite its simplicity, our new coder outperforms some of the best image coders published previously in the literature, for almost all test images (especially natural, hard-to-code ones) at almost all bit rates