| MPEG-4中基于内容的算术编码器的改进及优化 |
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| 引用本文： | 丁涛,戎蒙恬,刘文江.MPEG-4中基于内容的算术编码器的改进及优化[J].计算机工程,2006,32(8):229-231. |
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| 作者姓名： | 丁涛 戎蒙恬 刘文江 |
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| 作者单位： | 上海交通大学芯片与系统研究中心,上海,200030 |
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| 摘 要： | 针对MPEG-4实现中算术编码器的计算瓶颈，在算法上对原始Q—coder编码的进位翻转问题和移位加方法进行改进，大大提高了编码效率。针对二值形状视频对象编码消耗大量资源的特点，提出一种高效的实现CAE的VLSI结构。在内部采用了一种延迟缓冲线机制保存输入的像素，每个时钟输出相应模板的内容，问时最大限度地安排要重复使用的像素。
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| 关 键 词： | 形状编码 基于内容的算术编码 延迟缓冲线 |
| 文章编号： | 1000-3428（2006）08-0229-03 |
| 收稿时间： | 05 30 2005 12:00AM |
| 修稿时间： | 2005-05-30 |
Improvement and Optimization of Content-based Arithmetic Coding in MPEG-4 |
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| DING Tao,RONG Mengtian,LIU Wenjiang.Improvement and Optimization of Content-based Arithmetic Coding in MPEG-4[J].Computer Engineering,2006,32(8):229-231. |
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| Authors: | DING Tao RONG Mengtian LIU Wenjiang |
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| Affiliation: | Research Center of Chip and System, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | This paper focuses on the computational bottleneck of arithmetic coding in MPEG-4. It improves the original Q coder by modified shift-and-add scheme, with the consideration of carry-over problem. In order to get better coding efficiency, a high efficient VLSI structure of CAE is proposed to resolve the high resources consumption problem. It embeds a delay-line buffer in it to store the input pixels, thus it can directly output pixels according to the specific template, reuse data maximally. |
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| Keywords: | MPEG-4 |
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