Video encrypting scheme based on H.264 CAVLC entropy coding

doi:10.3778/j.issn.1002-8331.2009.34.035

Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (34): 114-117.DOI: 10.3778/j.issn.1002-8331.2009.34.035

• 网络、通信、安全 • Previous Articles Next Articles

Video encrypting scheme based on H.264 CAVLC entropy coding

LI Xiao-ju¹，FENG Zhan-shen²，HU You-qing³

1.Zhengzhou Institute of Aeronautical Industry Management，Zhengzhou 450015，China
2.Department of Mathematics，Xuchang University，Xuchang，Henan 461000，China
3.School of Information Science & Technology，Southwest Jiaotong University，Chengdu 610031，China

Received:2008-07-07 Revised:2008-10-13 Online:2009-12-01 Published:2009-12-01
Contact: LI Xiao-ju

基于H.264 CAVLC熵编码的视频加密方案

李晓举¹，冯战申²，胡友情³

1.郑州航空工业管理学院，郑州 450015
2.许昌学院数学系，河南许昌 461000
3.西南交通大学信息科学与技术学院，四川成都 610031

通讯作者: 李晓举

Abstract

Abstract: Block-based digital video encoding generally includes motion estimation，residual transformation and entropy encoding.Considering the traditional video encrypting schemes encrypt the coefficients of residual transformation，a new video encrypting scheme based on H.264 CAVLC entropy coding is proposed in this paper.The proposed scheme makes the best of the advantage of stream cipher，and the process of encrypting is occurred in entropy encoding.Theory analysis and experiment show that this scheme has good security and low complex.Furthermore，it has very limited impact on the compact ratio.The proposed scheme is flexible，and it has three levels，which can be adequate for various applications.

Key words: video encrypting, H.264, Advanced Video Coding（AVC）, Context-based Adaptive Variable Length Coding（CAVLC）

摘要： 基于块的数字视频编码一般包括运动估计、残差块变换和熵编码三个阶段。针对传统的视频加密方案——对第二阶段中的残差变换系数进行的加密，提出了一种基于H.264 CAVLC熵编码的视频加密方案，该方案充分利用了流密码加密简单、运算快的优点，将加密过程置于视频编码的第三个阶段。理论分析和实验结果表明，该方案具有较高的安全性和较低的计算复杂度，加密运算不改码流结构，加密后的视频仍具有可操作性，不影响压缩性能，且可以根据应用需求进行分级加密，具有很大的灵活性。

关键词: 视频加密, H.264编码标准, 高级视频编码, 上下文自适应变长编码（CAVLC）技术

CLC Number:

TP391

LI Xiao-ju¹，FENG Zhan-shen²，HU You-qing³. Video encrypting scheme based on H.264 CAVLC entropy coding[J]. Computer Engineering and Applications, 2009, 45(34): 114-117.

李晓举¹，冯战申²，胡友情³. 基于H.264 CAVLC熵编码的视频加密方案[J]. 计算机工程与应用, 2009, 45(34): 114-117.

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Video encrypting scheme based on H.264 CAVLC entropy coding

基于H.264 CAVLC熵编码的视频加密方案

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