28 April 2010 Region-of-interest-based bit-allocation scheme for H.264/AVC
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Abstract
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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Taoran Lu, Taoran Lu, Zhifeng Chen, Zhifeng Chen, Dapeng Wu, Dapeng Wu, Heather Yu, Heather Yu, } "Region-of-interest-based bit-allocation scheme for H.264/AVC", Proc. SPIE 7708, Mobile Multimedia/Image Processing, Security, and Applications 2010, 77080Q (28 April 2010); doi: 10.1117/12.849166; https://doi.org/10.1117/12.849166
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