An Improved SPIHT Algorithm Based on Wavelet Coeff
2016-08-23
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An improved set partition in hierarchical trees
(SPIHT) algorithm based on wavelet coefficient blocks is
presented for image coding. According to the algorithm
characteristic of traditional SPIHT that scanning once can
process four wavelet coefficients, our approach is to divide the
wavelet transform coefficient matrix into corresponding
coefficient blocks and encodes every block with different
strategy. When the maximum value of the coefficient block is
less than the current threshold, only one bit is used for coding,
thus to d
(SPIHT) algorithm based on wavelet coefficient blocks is
presented for image coding. According to the algorithm
characteristic of traditional SPIHT that scanning once can
process four wavelet coefficients, our approach is to divide the
wavelet transform coefficient matrix into corresponding
coefficient blocks and encodes every block with different
strategy. When the maximum value of the coefficient block is
less than the current threshold, only one bit is used for coding,
thus to d
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