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Improved 3D-Wavelet Video Coder
Zhang Zongping,Liu Guizhong,Hou Xingsong
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
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¡¡Abstract: Considering the differences of statistical property varying across subbands in temporal direction and spatial direction,an optimized scalable temporal-spatial wavelet tree is firstly defined to capture the diffecences of correlation between intra-frame£¬inter-frame improveing coding efficiency of the temporal-low spatial-high subbands. Then an im
proved 3D-SPIHT videocoder is developed based on the scalable temporal-spatial wavelet tree as well as a modified 3D-SPIHT coding algorthm. Simulations at low bit-rate yield the prior performance to H.263 Coder. The coder has the desired embedded feature for progressive transmission and precise rate control for constant bit-rate traffic application.
Keywords: wavelet transform;3D-wavelet tree;video coding