...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Multimedia Tools and Applications >An efficient authentication scheme for high efficiency video coding/H.265
【24h】

An efficient authentication scheme for high efficiency video coding/H.265

机译：高效视频编码/ H.265有效认证方案

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this paper, a semi-fragile authentication scheme for high efficiency video coding is proposed. In this scheme, 4 x 4 intra luma transform blocks of I-frames are divided into two disjoint subsets. One subset is used for authentication code generation and another subset is used for embedding the generated code. From these subsets, blocks are selected on the basis of the quality and robustness thresholds. These thresholds are calculated at runtime by using a low-complexity spatial analysis. The authentication code is generated based on the relationship between number of positive and negative quantized discrete sine transformed coefficients in a block. The generated authentication code is embedded by altering the magnitudes of quantized discrete sine transformed coefficients during encoding of the video sequence. The process of authentication has low complexity as embedded authentication code can be extracted and verified without full decoding of the encoded bit-stream. Experimental results show that the proposed scheme is efficient in terms of imperceptibility, increase in bit-rate, computational complexity, robustness to re-compression, frame dropping, noise attacks and fragile to malicious attacks.
机译：本文提出了一种用于高效视频编码的半易碎认证方案。在该方案中，I帧的4×4 intra的Luma变换块被分成两个不相交的子集。一个子集用于认证码生成，并且另一个子集用于嵌入生成的代码。从这些子集中，基于质量和鲁棒性阈值选择块。通过使用低复杂性空间分析，在运行时计算这些阈值。基于块中的正数和负量化离散正弦变换系数之间的关系之间的关系生成认证码。通过在视频序列的编码期间改变量化离散正弦变换系数的量化离散正弦变换系数的大小来嵌入所生成的认证码。身份验证的过程具有低复杂性，因为可以在不完全解码编码的比特流的情况下提取和验证嵌入式认证码。实验结果表明，该方案在难以察觉的方面有效，比特率，计算复杂性，重新压缩，框架下降，噪声攻击以及恶意攻击脆弱的鲁棒性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号