摘要
主要介绍在双核BF-561处理器上通过一种并行算法实现XGA分辨力的MPEG-4视频编码器。首先介绍了BF-561双核之间的通信与同步的实现,然后介绍了XGA分辨力MPEG-4算法的实现和优化。最后说明了MPEG-4编码器在双核上的任务分配,调整了数据传输和内存分配,并通过多项优化,实现了XGA图像的实时编码,编码速度达18f/s(帧/秒)。
Implementation of MPEG-4 video encoder for XGA resolution ratio based on dual-core DSP BF-561 mainly by a parallel algorithm is introduced in this paper. Firstly, the implementation of communication and synchronisation between dual-core DSP BF-561 by some semaphores defined in shared memory is introduced. Secondly, the implementation and optimization of MPEG-4 algorithm for XGA resolution ratio are introduced. Finally, the task allocation of MPEG-4 video encoder on dual-core is introduced. The data transmission and memory allocation are adjusted. Real-time coding for XGA resolution ratio video is accomplished by multiple optimization. The encoding speed attains to 18 f/s(frame/second).
出处
《电视技术》
北大核心
2009年第1期32-35,共4页
Video Engineering