低码率下MPEG—2自适应量化控制策略 |
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引用本文: | 杨东 李军. 低码率下MPEG—2自适应量化控制策略[J]. 上海交通大学学报, 1998, 32(4): 40-43 |
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作者姓名: | 杨东 李军 |
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摘 要: | 对MPEG-2TM5量化控制策略进行了修正,提出了一种基于宏块直方图特性的自适应量化控制方法.该方法考虑了人眼的视觉特性和编码效率,适应于低码率下的MPEG-2压缩编码,并能有效地提高图象质量.
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关 键 词: | 视频编码;MPEG-2;自适应量化;直方图 |
Adaptive Quantization Algorithm for MPEG 2 in Low Bit Rate |
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Abstract: | The quantization strategy used by TM5 for MPEG 2 is modified and a new adaptive quantization algorithm based on the histogram of macro blocks is proposed.The new algorithm exploits the visual quality.The results of computer simulation show that it is better than TM5 in low bit rate coding. |
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Keywords: | video coding MPEG 2 adaptive quantization histogram |
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