Title :
Three-dimensional subband video transmission through mobile satellite channels
Author :
Wang, Xiaohong ; Blostein, Steven D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
Pyramidal vector quantization (PVQ), with its robust fixed-rate property, has been applied to two-dimensional (2-D) image coding. We extend the PVQ scheme to three-dimensional (3-D) subband video coding and apply it to shadowed mobile satellite channels. The Canadian geostationary mobile satellite channel has been modeled as shadowed Rician fading. The proposed scheme has efficient image compression while exhibiting graceful performance degradation in fading and shadowing as encountered in the mobile satellite channel. This ensures consistent visual quality for video signals transmitted over a shadowed fading channel with minimum delay and system complexity. Compared to the 2-D subband PVQ algorithm, the 3-D scheme can achieve 1.0-2.0 dB PSNR improvement or, equivalently, 21-34% bit rate reduction
Keywords :
Rician channels; data compression; delays; fading; mobile satellite communication; vector quantisation; video coding; visual communication; 2D subband PVQ algorithm; 3D subband video coding; 3D subband video transmission; Canadian geostationary mobile satellite; PSNR; PVQ; bit rate reduction; coded modulation; image compression; minimum delay; minimum system complexity; performance degradation; pyramidal vector quantization; robust fixed rate property; shadowed Rician fading; shadowed mobile satellite channels; three-dimensional subband video transmission; two-dimensional image coding; video signals; visual quality; Degradation; Fading; Image coding; Rician channels; Robustness; Satellites; Shadow mapping; Two dimensional displays; Vector quantization; Video coding;
Conference_Titel :
Image Processing, 1995. Proceedings., International Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-7310-9
DOI :
10.1109/ICIP.1995.537652
