| DM642图像数据传输的实现和优化 |
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| 引用本文： | 张永光 张晓蕾 徐健健. DM642图像数据传输的实现和优化[J]. 科学技术与工程, 2007, 7(17): 4484-4486 |
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| 作者姓名： | 张永光 张晓蕾 徐健健 |
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| 作者单位： | 南京大学应用物理研究所,南京,210093;南京大学应用物理研究所,南京,210093;南京大学应用物理研究所,南京,210093 |
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| 摘 要： | 针对H.264视频编码器在DM642DSP上的移植和优化工作,主要介绍了DM642存储空间和EDMA控制器的特点,给出了EDMA在视频实时编码系统中图像数据传输的具体控制和实现方法。实测结果表明,灵活使用EDMA不仅能够提高图像数据传输效率,而且可以充分发挥DM642的高速性能。
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| 关 键 词： | DSP 视频编码 DM642 Cache EDMA |
| 文章编号： | 1671-1819(2007)17-4484-03 |
| 修稿时间： | 2007-04-23 |
Implement and Optimization of Video Data Transmission Based on TMS320DM642 |
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| ZHANG Yong-guang,ZHANG Xiao-lei,XU Jian-jian. Implement and Optimization of Video Data Transmission Based on TMS320DM642[J]. Science Technology and Engineering, 2007, 7(17): 4484-4486 |
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| Authors: | ZHANG Yong-guang ZHANG Xiao-lei XU Jian-jian |
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| Affiliation: | Institue of Applied Physics of Nanjing University, Nanjing 210093, P. R. China |
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| Abstract: | According to the optimization and migration work of H.264 video encoder based on digital signal processor(DSP) DM642, the characteristics of DM642 Cache and the enhanced direct memory access(EDMA)are introduced, and then presented a detailed realization method of transmitting the image data in real-time video encoder by EDMA. The resoults show that the efficiency of image data transmission would be improved and the high performance of DM642 would be brought into play very well after using EDMA exactly. |
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| Keywords: | DSP video coding DM642 cache EDMA |
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