基于通用DSP的多路视频编码器的优化实现  

Optimized Implementation of Multi-Channel Video Encoder Based on General DSP

作　　者：李波[1] 孟庆磊[1] 姚春莲[1] 姜黎[1] 

机构地区：[1]北京航空航天大学计算机学院数字媒体室,北京100083

出　　处：《电子学报》2006年第11期2103-2108,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60505007);教育部博士点基金(No.20030006034);国防基础科研项目

摘　　要：本文基于单片TI DM642设计实现了四路MPEG-4实时编码器,具有功能强、可靠性高、体积小和功耗低等特点.在硬件设计中,充分利用了DM642可以同时接受多路视频信号、DSP数据处理与EDMA数据传输并行工作等特点,构造了处理速度快、控制灵活的视频编码硬件平台.在软件实现中,根据DSP的硬件和资源特点,提出了基于最优位置计算的半像素运动估计和高效量化策略,设计了基于GMB的编码方式.This paper presents an embedded multi-channel video encoder using single-chip TI DM642 DSP. Not only could it process 4-way video signals real-time, but also it is full-function, high-reliability, small-size cubage, flexible control and low-power consumption. We construct encoder hardware platform by taking full advantage of DM642 DSP, video ports of DM642 can accept multi-channel video signals at the same time, and DSP handle video data parallel with the operation of data transferring using EDMA. By analyzing the hardware architecture and resource of DM642, we presents GMB coding scheme and efficient algorithm for DSP, namely fast motion estimation algorithm by calculating the best position in sub-pixel level, and DSP-based efficient quantization algorithm etc.

关 键 词：编码 视频 MPEG-4 DSP 嵌入式 

分 类 号：TN919.8[电子电信—通信与信息系统]