tailieunhanh - báo cáo hóa học: " Bit-depth scalable video coding with new interlayer prediction"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Bit-depth scalable video coding with new interlayer prediction | Chiang et al. EURASIP Journal on Advances in Signal Processing 2011 2011 23 http content 2011 1 23 o EURASIP Journal on Advances in Signal Processing a SpringerOpen Journal RESEARCH Open Access Bit-depth scalable video coding with new interlayer prediction Jui-Chiu Chiang Wan-Ting Kuo and Po-Han Kao Abstract The rapid advances in the capture and display of high-dynamic range HDR image video content make it imperative to develop efficient compression techniques to deal with the huge amounts of HDR data. Since HDR device is not yet popular for the moment the compatibility problems should be considered when rendering HDR content on conventional display devices. To this end in this study we propose three AVC-based bit-depth scalable video-coding schemes called the LH scheme low bit-depth to high bit-depth the HL scheme high bitdepth to low bit-depth and the combined LH-HL scheme respectively. The schemes efficiently exploit the high correlation between the high and the low bit-depth layers on the macroblock MB level. Experimental results demonstrate that the HL scheme outperforms the other two schemes in some scenarios. Moreover it achieves up to 7 dB improvement over the simulcast approach when the high and low bit-depth representations are 12 bits and 8 bits respectively. Keywords scalable video coding bit-depth high-dynamic range inter-layer prediction 1. Introduction The need to transmit digital video audio content over wired wireless channels has increased with the continuing development of multimedia processing techniques and the wide deployment of Internet services. In a heterogeneous network users try to access the same multimedia resource through different communication links consequently in a compressed bitstream scalability has to be ensured to provide adaptability to various channel characteristics. To make transmission over heterogeneous networks more flexible the concept of scalable video coding SVC was proposed in 1-3 . .