Parallel Implementation of Xvid Decoder on Multi-Core

Abstract

With rapid development of multimedia technology, performance of computers is changing constantly. Today even the most ordinary computers have already equipped with multi-core processors. At the same time, high-quality videos have become main requirement of customers. Therefore it is a serious problem how to make video codec process a large number of video data efficiently on multi-core processors. It is a good way to develop the software which is compatible with multi-core. But most video codec has been already designed and developed for single-core processors. So it’s a good idea to transform the current sequential program into the parallel one by the parallelization runtime library. In this paper we choose Intel isomorphic quad-core processor as hardware platform, Linux as OS, and use Intel parallel runtime library TBB to transform the decoder. The transformation includes that Loop parallelization, memory parallelization, data parallelization, pipeline parallelization and task-level parallelization. Then, for testing, sequential program and parallel one run on the same environment respectively, and the final results show that after parallelization the performance has improved significantly