| Fast Mode Decision Method Based on Historical Information for H.264/AVC |
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| 作者姓名： | 王淑慧 林涛 林争辉 |
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| 作者单位： | Dept.of Electronic Eng. Shanghai Jiaotong Univ.，VLSI Lab.，Tongji Univ.，Dept.of Electronic Eng.，Shanghai Jiaotong Univ.，Shanghai 200240 China，VLSI Lab.，Tongji Univ.Shanghai 200092 China，Shanghai 200092 China，Shanghai 200240 China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | Mode decision based on rate-distortion optimization algorithm brings high compression efficiency to H.264/AVC. However, heavy computation load is also added to the encoder at the same time. In order to reduce the computation burden of mode decision, this paper presented a fast mode decision method based on mode information of the previously coded frame. Moreover, all coding modes were activated when scene change occurs and a scheme to detect scene change was proposed. The simulation results show that compared to the original encoder, the proposed method achieves a reduction of over 38% encoding time and keeps almost the same PSNR and bitrate for a wide range of quantization parameter.
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Fast Mode Decision Method Based on Historical Information for H. 264/AVC |
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| WANG Shu-hui,LIN Tao,LIN Zheng-hui.Fast Mode Decision Method Based on Historical Information for H.264/AVC[J].Journal of Shanghai Jiaotong university,2007,12(4):437-441. |
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| Authors: | WANG Shu-hui LIN Tao LIN Zheng-hui |
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| Abstract: | Mode decision based on rate-distortion optimization algorithm brings high compression efficiency to H.264/AVC. However, heavy computation load is also added to the encoder at the same time. In order to reduce the computation burden of mode decision, this paper presented a fast mode decision method based on mode information of the previously coded frame. Moreover, all coding modes were activated when scene change occurs and a scheme to detect scene change was proposed. The simulation results show that compared to the original encoder, the proposed method achieves a reduction of over 38% encoding time and keeps almost the same PSNR and bitrate for a wide range of quantization parameter. |
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| Keywords: | H 264/AVC mode information scene change |
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