Title :
A real-time simulcast multi-view wavelet video coding based on skipping of spatial subbands
Author :
Belyaev, Evgeny ; Egiazarian, Karen ; Gabbouj, Moncef
Author_Institution :
Dept. of Signal Process., Tampere Univ. of Technol., Tampere, Finland
Abstract :
In this paper a real-time simulcast multi-view video coding based on three-dimensional discrete wavelet transform (3D DWT) is considered. An efficient rate-distortion criterion of skipping spatial subbands is proposed. A processing of subbands is done in a group of frames from low frequency to high-frequency temporal subbands and from low frequency to high-frequency spatial subbands. If for the processed subband in the current view it appears to be more efficient not to include the highest significant bit-plane into the output bit stream, then all the corresponding temporal and spatial child subbands are skipped without any calculations of 2-D wavelet transforms and entropy encoding. Moreover, all corresponding spatial subbands in sequel views (with its child subbands) are skipped as well. Simulations results have demonstrated that the 3-D DWT codec with the proposed skipping rule has much lower computational complexity (from 2 up to 8 times) for the same quality level compared to the H.264/AVC standard in the low complexity mode.
Keywords :
computational complexity; entropy codes; rate distortion theory; video coding; wavelet transforms; 2D wavelet transform; 3-D DWT; H.264-AVC standard; computational complexity; entropy encoding; low frequency-high-frequency spatial child subband; low frequency-high-frequency temporal child subband; output bit-plane streaming; rate-distortion criterion; real-time simulcast multiview wavelet video coding; skipping spatial subband processing; three-dimensional discrete wavelet transform; Codecs; Complexity theory; Discrete wavelet transforms; Image coding; Rate-distortion; Real-time systems; Video coding;
Conference_Titel :
Image and Signal Processing and Analysis (ISPA), 2013 8th International Symposium on
Conference_Location :
Trieste
DOI :
10.1109/ISPA.2013.6703745