Optimized perfect reconstruction tree-structured filter banks for image coding
نویسندگان
چکیده
By employing nonuniform nonunitary lter bank in an image coder increased performance in terms of both theoretical and practical (PSNR) coding gains, and subjective quality can be obtained. One possible candidate is octave-band tree-structured lter banks. In this paper, an optimized perfect reconstruction octave-band three-stage tree-structured lter bank is proposed. The lter coeecients are optimized at each stage for sub-band coding gain. The performance of the proposed lter bank outperforms both traditional octave-band three-stage tree-structured lter banks and parallel l-ter banks in terms of both PSNR and visual quality.
منابع مشابه
Nonuniform Nonunitary Perfect Reconstruction Filter Banks for Image Coding
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