Recently, fractal and subband coding were combined to achieve good picture quality at very low bit rates, and the technique was named predictive pyramid coding (PPC) [5]. In this paper, we improve PPC performance by u...
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Recently, fractal and subband coding were combined to achieve good picture quality at very low bit rates, and the technique was named predictive pyramid coding (PPC) [5]. In this paper, we improve PPC performance by utilizing the inter-subband correlation between different groups of subbands. As a result, we can reduce the bit rate by 0.011-0.043 bpp without degrading the coded picture quality, or we can increase the coded picture quality by 0.29-0.63 dB without increasing the bit rate.
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