基于CUDA平台的并行化实时视频编码  

Parallelized real-time video encoding based on CUDA

作　　者：张然[1] 刘佩林[1] 

机构地区：[1]上海交通大学电子信息工程系,上海200240

出　　处：《信息技术》2011年第4期14-18,84,共6页Information Technology

基　　金：上海市国际科技合作基金项目(08700740800)

摘　　要：HD视频的编码技术具有广阔的应用前景,为解决其大数据量实时处理的瓶颈问题,提出一种基于CUDA平台的并行编码系统架构。根据CUDA平台软硬件结构特性,采用三级并行机制;并提出一种高并行化快速ME搜索算法;同时合理分配内存空间,实现大数据量的实时运算与存取。实验结果表明,方案具有高并行度,高编码速率的特点,对HD视频可达到实时编码要求。High-definition video encoding is potentially and widely used in digital image processing field.A parallel video encoding system framework based on CUDA platform is proposed in this paper to deal with the real-time processing of great mass data.In order to deal with the large data calculation in real time,firstly,a 3-level（processor level,block level,thread level） parallel design is applied to the encoding system,which increases the parallelism and the resources occupancy rate;secondly,a highly parallel ME fast searching algorithm is proposed to accelerate the parallel data processing.And in order to deal with the large data transmission in real time,a proper memory management is proposed.The experiment results show that the proposed system is highly paralleled compared with the system running on CPU only.And the encoding speed is significantly increased to over 25fps,which satisfies the requirement of the real-time HD video encoding.

关 键 词：CUDA 并行计算 视频编码 ME 

分 类 号：TN919.8[电子电信—通信与信息系统]