Efficient video coding based on backward coding of wavelet trees

Linning Ye; Jiangling Guo; Brian S. Nutter; Sunanda D. Mitra

doi:10.1117/1.OE.51.4.047403

24 April 2012 Efficient video coding based on backward coding of wavelet trees

Linning Ye, Jiangling Guo, Brian S. Nutter, Sunanda D. Mitra

Author Affiliations +

Optical Engineering, Vol. 51, Issue 4, 047403 (April 2012). https://doi.org/10.1117/1.OE.51.4.047403

Abstract

The authors present a wavelet tree-based video coding system, which is referred to as three-dimensional (3-D) backward coding of wavelet trees (BCWT). The 3-D BCWT algorithm encodes the wavelet trees from the lowest wavelet level to the highest wavelet level. All the coding steps for each wavelet coefficient are finished during one coding pass, which makes this algorithm very efficient. The coding process of the 3-D BCWT algorithm is subband by subband, so that a coefficient will be encoded only after all the coefficients in the next lower-level wavelet subbands have been encoded. The output bitstream of the encoder is therefore layered according to the wavelet level. The implementation results show that the 3-D BCWT algorithm has almost identical rate distortion performance to the well-known 3-D set partitioning in hierarchical trees (SPIHT) algorithm. However, it is computationally more efficient and uses significantly less memory than the 3-D SPIHT algorithm.

Citation Download Citation

Linning Ye, Jiangling Guo, Brian S. Nutter, and Sunanda D. Mitra "Efficient video coding based on backward coding of wavelet trees," Optical Engineering 51(4), 047403 (24 April 2012). https://doi.org/10.1117/1.OE.51.4.047403

Published: 24 April 2012

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