| A New MPEG-2 Rate Control Method Based on Model Classification |
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| 作者姓名： | 古继兴 郑世宝 王嘉 孙军 |
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| 作者单位： | Inst.ofImageCommunication＆InformationProcessing,ShanghaiJiaotongUniv.,Shanghai200030,China |
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| 基金项目： | The High Technology Research and Devel-opm ent Program of China( No. 2 0 0 2 AA10 3 0 87) |
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| 摘 要： | The paper proposed a new MPEG-2 rate control method that is based on model classification. The macro-blocks are classified according to their prediction errors, and different parameters are used in the rate-quantization and distortion quantization model. The different model parameters are calculated from the previous frame of the same type in the process of coding. These models are used to estimate the relations among rate, distortion and quantization of the current frame. Further steps, such as R-D optimization based quantization adjustment and smoothing of quantization of adjacent macroblocks, are used to improve the quality. The results of the experiments prove that the technique is effective and can be realized easily. The method presented in the paper can be a good way for MPEG rate control.
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| 关 键 词： | MPEG-2 速率控制 模式分级 宏块 |
A New MPEG-2 Rate Control Method Based on Model Classification |
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| GU Ji-xing,ZHENG Shi-bao,WANG Jia,SUN Jun.A New MPEG-2 Rate Control Method Based on Model Classification[J].Journal of Shanghai Jiaotong university,2004,9(3):37-40. |
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| Authors: | GU Ji-xing ZHENG Shi-bao WANG Jia SUN Jun |
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| Abstract: | The paper proposed a new MPEG-2 rate control method that is based on model classification. The macro-blocks are classified according to their prediction errors, and different parameters are used in the rate-quantization and distortion-quantization model. The different model parameters are calculated from the previous frame of the same type in the process of coding. These models are used to estimate the relations among rate, distortion and quantization of the current frame. Further steps, such as R-D optimization based quantization adjustment and smoothing of quantization of adjacent macroblocks, are used to improve the quality. The results of the experiments prove that the technique is effective and can be realized easily. The method presented in the paper can be a good way for MPEG rate control. |
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| Keywords: | rate control model classification macroblock |
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