【摘要】 利用嵌入式系统完成MPEG-4图像编码时,由于编码运算复杂度高,而硬件运算速度又有限制,因而实现实时编码具有较大困难。通过分析MPEG-4图像编码器的运算量分布情况,结合TMS320C6416的结构特点,可以综合使用程序结构优化、应用层优化、代码优化的方法,把开源的XVID的C代码移植到C6416的过程中,实现程序整体优化。该方法相对于传统的单一优化,能更好提高程序的并行性和存储器的访问效率,从而在基于DSP(digital signal processor)的嵌入式系统中实现了MPEG-4图像实时编码。更多还原

【Abstract】 When using an embeded system to complete MPEG-4 encoder,there are many difficulties in encoding in real time due to encoding algorithm complexity and hardware speed limit.Many optimization technologies were proposed in MPEG-4 encoder when transplanting C program of open source XVID to TMS320C6416.These include program structure optimization,application layer optimization,and code optimization.These technologies were based on the structure of an MPEG-4 encoder and TMS320C6416 characteristics.The optimization could improve program speed in parallel operation and effectual memory access.Experimental results indicate the optimized encoder can operate well in real time.更多还原