IEEE Trans Image Process - Adaptive quantization-parameter clip scheme for smooth quality in H.264/AVC.

Tópicos

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Resumo

In this paper, we investigate the issues over the smooth quality and the smooth bit rate during rate control (RC) in H.264/AVC. An adaptive quantization-parameter (Q(p)) clip scheme is proposed to optimize the quality smoothness while keeping the bit-rate fluctuation at an acceptable level. First, the frame complexity variation is studied by defining a complexity ratio between two nearby frames. Second, the range of the generated bits is analyzed to prevent the encoder buffer from overflow and underflow. Third, based on the safe range of the generated bits, an optimal Q(p) clip range is developed to reduce the quality fluctuation. Experimental results demonstrate that the proposed Q(p) clip scheme can achieve excellent performance in quality smoothness and buffer regulation.

Resumo Limpo

paper investig issu smooth qualiti smooth bit rate rate control rc havc adapt quantizationparamet qp clip scheme propos optim qualiti smooth keep bitrat fluctuat accept level first frame complex variat studi defin complex ratio two nearbi frame second rang generat bit analyz prevent encod buffer overflow underflow third base safe rang generat bit optim qp clip rang develop reduc qualiti fluctuat experiment result demonstr propos qp clip scheme can achiev excel perform qualiti smooth buffer regul

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