基于H.264的DCT变换系数解码的FPGA实现  

Implementation of H.264 IDCT algorithm based on FPGA

作　　者：梁盼[1] 付永庆[1] 陶宝泉 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2010年第2期20-23,共4页Applied Science and Technology

摘　　要：根据H.264码流解码过程中整数DCT逆变换逆量化的算法原理,优化设计出一种基于FPGA的新型解决方案.设计采用VHDL和C语言相结合的编程方式,其中源数据的获取和分析在NIOSⅡ软核处理器中用C编程完成,各高效算法则用硬件描述语言VHDL编程实现.说明了逆量化和逆变换的算法原理,各功能模块的设计流程和仿真结果.设计充分利用DCT算法的对称性,提出用高度并行结构来加快处理速度的方法.设计方案在保证运算精度的同时,结构简洁、运行速度快,可移植性强.According to the algorithm principle of the H.264 integer DCT inverse transform and quantization, a new scheme is designed based on field programmable gate array （FPGA）. Both VHDL and C language were selected as programming languages in the design. The acquisition and analysis of source data were controlled by NIOS Ⅱ soft-core processor programmed by C language. The hardware description language was used to complete efficient algorithm. The algorithm principle of inverse quantization and transform, the design flow of each functional module, and the result of simulation were introduced in detail in this paper. According to the symmetry of the DCT arithmetic, high parallel structure has been proposed to accelerate the system operation speed in the design. The final results show that the scheme not only can meet the demand of calculation precision, but also has concise structure, high operating speed and powerful transplantable capability.

关 键 词：H.264 DCT 逆量化 FPGA 

分 类 号：TN911.7[电子电信—通信与信息系统]