北京大学学报（自然科学版）

用于H.264/AVC水印嵌入的低复杂度误差补偿算法

张李伟1,2,朱跃生1,2,布礼文2   

  1. 1. 北京大学深圳研究生院信息工程学院, 深圳 518055; 2. 香港城市大学电子工程系, 香港;
  • 收稿日期:2012-03-06 出版日期:2013-03-20 发布日期:2013-03-20

A Fast Watermarking Algorithm with Low Complexity Error Compensation in H.264/AVC Bit-Stream

ZHANG Liwei1,2, ZHU Yuesheng1,2, Po Lai-man2   

  1. 1. School of Computer and Information Engineering, Shenzhen Graduate School, Peking University, Shenzhen 518055; 2. Department of Electronic Engineering, City University of Hong Kong, Hong Kong;
  • Received:2012-03-06 Online:2013-03-20 Published:2013-03-20

PDF

PDF (翻译版)

摘要： 直接在H.264/AVC比特流中嵌入水印可以极大地提高水印算法的效率, 但是由此而引入的传播误差效应会使视频质量严重降低。针对该问题, 提出一种低复杂度的误差补偿算法来消除传播误差。该算法中, 水印被嵌入到量化之后的DCT系数中, 利用一个新的误差预测模块对当前块进行误差计算, 然后将其动态补偿到当前块以消除传播误差对视频质量的影响。实验结果表明, 所提出的算法具有低复杂度、高视频质量以及较小比特率增加等优点, 可以应用于实时的视频水印嵌入方案。

关键词: 视频水印, 误差传播, H.264/AVC, 帧内预测

Abstract: Watermarking algorithms in the H.264/AVC bit-stream are more efficient, but the propagation error introduced would decrease the visual quality severely. In order to reduce the computation complexity of compensation, a new error compensation method is proposed, in which the watermark is embedded into the quantized DCT coefficients and the propagation error gained by a low complexity error prediction module are compensated adaptively. The simulation results show that with the proposed compensation method, a real time video watermarking can be realized, with the features of low complexity, high PSNR and less bitrate increase.

Key words: video watermarking, error propagation, H.264/AVC, intra prediction

中图分类号: 

版权所有 © 《北京大学学报（自然科学版）》编辑部
技术支持：北京玛格泰克科技发展有限公司