Research and Implentation of Integer DCT in H.264 Based on DSP

CHENG Bao-yuan; WU Meng-ze; ZHANG Qing-xi; HAO Yan-li

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Research and Implentation of Integer DCT in H.264 Based on DSP

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- Research and Implentation of Integer DCT in H.264 Based on DSP
- Vol. 14, Issue 5, Pages: 27-30(2009)
- 作者机构：
  
  哈尔滨理工大学测控技术与通信工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391.41
- Published：2009
- 稿件说明：
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CHENG Bao-yuan, WU Meng-ze, ZHANG Qing-xi, et al. Research and Implentation of Integer DCT in H.264 Based on DSP[J]. 2009, 14(5): 27-30.
DOI：

CHENG Bao-yuan, WU Meng-ze, ZHANG Qing-xi, et al. Research and Implentation of Integer DCT in H.264 Based on DSP[J]. 2009, 14(5): 27-30. DOI：

摘要

H.264视频编码标准采用整数离散余弦变换(DCT)算法

避免了反变换中的误匹配问题

与传统的余弦变换相比

整数DCT加快了变换速度

且易于硬件实现.本文分析了H.264的整数DCT的原理及采用蝶形快速算法的实现方法

对整数DCT的变换核进行了优化

并对新的变换核应用MATLAB软件进行了仿真.结果表明

采用优化后的变换核的整数DCT更接近于离散余弦变换

且提高了重建视频图像的主观质量.

Abstract

Using the integer Discrete Cosine Transform(DCT)

H.264 avoids the mismatch problem

and increases the computation speed and make hardware implementation easy.This paper analysed the principle of the H.264 integer DCT and fast papilionaceous algorithm

and changed its transform core

simulated the new core using MATLAB.The results show that integer DCT with new transform core is closer than DCT

and enhances the subjective quality of reconstruction image.

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