MPEG4编码器二维DCT变换的FPGA实现及优化

2-D DCT implementation and optimization for MPEG4 encoder based on FPGA

本文提出了一种适用于MPEG4视频编码系统的二维DCT的FPGA设计方案,该方案具有实时、高精度、易于FPGA实现的特点。在设计中,分别对DCT的算法及实现方法进行了分析和选择;在此基础上,对系统的结构进行了优化,提出了一种不同于传统二维DCT系统的新结构。最后对IDCT单元的运算精度进行了验证。

An FPGA design to 2 dimensions DCT in MPEG4 video compression system is presented. The advantage of this design is： real-time, high accuracy, and adaptive to FPGA implementation. The implement method is adopted based on analysis on DCT arithmetic in this paper. A new system structure is presented, which differs from the traditional structure of video compress coding system. Finally, the computation accuracy of IDCT is verified.