Real-time foveation techniques for H.263 video encoding in software

被引:0
|
作者
Sheikh, HR [1 ]
Liu, SH [1 ]
Evans, BL [1 ]
Bovik, AC [1 ]
机构
[1] Univ Texas, Dept Elect & Comp Engn, Lab Image & Video Engn, Austin, TX 78712 USA
关键词
D O I
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中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Video coding techniques employ characteristics of the Human Visual System (HVS) to achieve high coding efficiency. Lee and Bovik have exploited foveation, which is a non-uniform resolution representation of an image reflecting the sampling in the retina, for low bit-rate video coding. In this paper, we develop a fast approximation of the foveation model and demonstrate real-time foveation techniques in the spatial domain and Discrete Cosine Transform (DCT) domain. We incorporate fast DCT domain foveation into the baseline H.263 video encoding standard. We show that DCT-domain foveation requires much lower computational overhead but generates higher bit rates than spatial domain foveation. Our techniques do not require any modifications of the decoder.
引用
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页码:1781 / 1784
页数:4
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