Region-of-Interest Based Bit-Allocation Scheme for H.264/AVC

被引：0
|
作者：
Lu, Taoran [1 ]
Chen, Zhifeng [1 ]
Wu, Dapeng [1 ]
Yu, Heather [2 ]
机构：
[1] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA
[2] Huawei Technol Co Ltd, Broomfield, CO USA
来源：
MOBILE MULTIMEDIA/IMAGE PROCESSING, SECURITY, AND APPLICATIONS 2010 | 2010年 / 7708卷
关键词：
Region-of-Interest (ROI); video coding; H.264; bit allocation;
D O I：
10.1117/12.849166
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
This paper presents a new Region-of-Interest (ROI) based bit-allocation scheme for advanced video coding (H.264). We use a group-of-picture (GOP) structure to compensate bits consumption between Intra and Inter frames in one GOP, and simultaneously adjust the quantization parameter (QP) for each macroblock, according to the region-of-interest on Intra(I) or Inter(P) frames, respectively. Our algorithm is implemented on the H.264/AVC codec JM14.0 and totally compatible with existing H.264/AVC decoders. The experimental results show that compared to the standard JM14.0 encoder, under the same bitrate budget, the proposed algorithm achieves a subjective visual quality improvement as well as an objective PSNR gain. The ROI-based bit allocation scheme has a potential to low-bitrate and real-time video applications, such as video conferencing and mobile TV broadcasting.
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页数：8
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