快速二维离散余弦变换的VLSI设计*

作者：朱竹青，郭裕顺*，秦 兴 日期：2010-09-08/span> 浏览：3460 查看PDF文档

快速二维离散余弦变换的VLSI设计*

朱竹青，郭裕顺*，秦 兴

(杭州电子科技大学 微电子CAD研究所，浙江 杭州 310018)
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摘要：针对多标准图像视频编码器中二维离散余弦变换的复用问题，设计了适用于MPEG4，H.263，JPEG，H.264 High Profile编码器芯片的快速8×8 2D DCT IP核，并完成了RTL设计、仿真和FPGA原型验证。通过引入H.264 High Profile 8×8整数变换矩阵和增加缩放模块，完成了多个标准中2D DCT的复用。经Xvid MPEG4编解码器验证，满足精度要求。设计采用流水线技术，并优化了速度和频率，在90 nm CMOS工艺下频率达到840 MHz。研究结果表明，该技术能很好地应用于多标准编码器中。
关键词：离散余弦变换；多标准图像与视频编码；JPEG；MPEG4；H.264
中图分类号：TH164；TN402
文献标识码：A文章编号：1001-4551(2010)07-0069-05

VLSI design of highspeed 2D DCT
ZHU Zhuqing, GUO Yushun, QIN Xing
(Institute of Microelectronics CAD, Hangzhou Dianzi University, Hangzhou 310018, China)
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Abstract: Aiming at the problem of reusing 2D DCT in the multistandard coder, the design of a highspeed 8×8 2D DCT IP core was presented, which could be used for the coding in MPEG4, H.263, JPEG and H.264. The reuse of the design for multistandard was realized by the adoption of an 8×8 integer transformation matrix from H.264 High Profile and a compensation module. The pipeline structure was employed to improve the speed and frequency of the circuit. The design was prototyped using FPGA in the Xvid MPEG4 codec. The results indicate that the design can be applied to multistandard coder very well.
Key words: discrete cosine transform(DCT); multistandard image and video coding; JPEG; MPEG4; H.264