基于QDMA的X264编码器优化

Optimization of X264 encoder based on QDMA

为提高X264编码器在TMS320C6416处理器上的编码速度,提出一种基于QDMA(快速存储器访问)的优化方法.根据C6416的存储结构和访问速度特点,通过设置双缓冲区,使用QDMA的方法实现了数据的搬运.实验表明,使用QDMA方式优化后编码器的率失真性能损失很小,编码时间平均缩短了11.82%,有效地提高了编码速度.

In order to improve the encoding speed of X264 encoding on TMS320C6416 processor,a optimize technique based on QDMA is proposed in this paper.Based on the cache architecture and access speed of C6416 processor,by setting double buffers and using QDMA,data moving was realized.Experiments show that,the optimization keeps a very small loss of rate distortion performance of encoding,and the encoding time which is less than the former by 11.82% in average,which effectively improve the encoding efficiency.