Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
摘要:
摘要： Downsampling video coding, whereby downsampled frames are encoded, provides improved perceptual quality in rate-constrained situations. This method shows considerable advantages over other approaches, particularly in wide-spreading high-definition video formats. This paper provides a comprehensive analysis of downsampling video coding. The study proposes a spatially scalable rate-distortion (RD) model, comprising quantization-distortion and quantization-rate models, and develops an optimal encoding frame size determination framework. The proposed method achieves a gain up to 2.3 dB peak signal-to-noise ratio (PSNR) at 1 Mb/s when compared with conventional full frame size coding. The RD performance is close to the optimal scenario, in which the ideal frame size is obtained by heuristically performing downsampling coding in various allowable sizes. 其他題名： TCSVT 出版者： New York: IEEE 出版日期： 2014-11 出處： IEEE transactions on circuits and systems for video technology, 2014-11, Vol.24 (11), p.1957-1968 資源來源： IEEE Xplore Digital Library 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nov 2014 識別號： ISSN: 1051-8215 識別號： EISSN: 1558-2205 識別號： DOI: 10.1109/TCSVT.2014.2302519 識別號： CODEN: ITCTEM
