TMS320DM642对视频图像欠采样压缩处理的实现  

Implement of Sub-Sampling Compression Process Procedure for Video Image Based on TMS320DM642

作　　者：李洪霞[1] 潘伟[2] 迟学芬[1] 吴伟刚[1] 

机构地区：[1]吉林大学通信工程学院,长春130012 [2]海南大学信息科学技术学院,海口570228

出　　处：《吉林大学学报（信息科学版）》2008年第2期147-151,共5页Journal of Jilin University（Information Science Edition）

摘　　要：通常采用降采样完成实时视频格式调整。在降采样过程中不可避免地会引入欠采样噪声。为此提出了TMS320DM642上欠采样噪声的处理算法,实现了在TMS320DM642上实时欠采样噪声处理,描述了该程序的优化。其可以支持从CIF(Common Intermediate Format)到SQCIF(Sub-Quarter Common Intermediate Format)的实时视频格式调整。实验结果表明,在网络传输带宽波动时,该方法可有效减小混叠,图像质量清晰流畅。To multimedia communication based on TCP/IP （Transmission Control Protocol/Internet Protocol） protocol, variable video format is one of the important ways to reduce bandwidth variation. Generally, the imple-ment of video format conversion is done through downsampling. Minifying digital images used downsampling introduces aliasing noise. This paper proposes a process algorithm based on TMS320DM642 to reduce aliasing noise, real time aliasing noise process is implemented using TMS320DM642, the process program optimization method is described also. The program supports real video format adjustment from CIF （Common Intermediate Format） to SQCIF （Sub-Quarter Common Intermediate Format）. The test result indicates that this method can be used to reduce aliasing noise, and the display of images is clear and fluent.

关 键 词：视频图像压缩 欠采样噪声 TMS320DM642 快速傅立叶变换 降采样 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]