摘要
针对流媒体载体类型的多样性造成隐藏过程的不一致等问题,提出了一种流媒体隐蔽通信系统的3层模型,该模型将流媒体的隐蔽通信过程划分为适配与执行、传输管理和隐蔽应用3个层次,定义了各层的功能、服务和接口原语等规则.针对隐蔽通信系统中的主要参数建立了数学模型,得到了隐蔽信道有效利用率的表达式,利用求偏导数方法计算出给定条件下系统参数的最佳值.该模型已经在VoIP隐蔽通信系统中得到实现.实验和测试表明:分层模型很好地解决了不同载体下流媒体隐蔽通信隐藏过程的一致性问题,模型的理论计算值对实际系统的优化设计具有直接指导意义.
Information hiding communication （IHC） over streaming media is an important branch of information hiding （IH）. As for the problem of inconsistent hiding process caused by the diversity of the streaming media data format, the paper proposes a three-layer system model, which divides the IHC process into adaption ~ execution, transmission management and IH application. The functionality, service and interface of each layer are defined. An analytical model for primary parameters is then established, obtaining the presentation of effective IH channel usage. The optimal system parameter is calculated using the partial derivative method. The system model has been implemented on the VolP platform. Experiments and tests show that the layered model successfully solves the inconsistent problem due to different carriers for IHC. The theoretical value of the optimal parameter serves the function of guiding the design of a practical system.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第3期554-558,共5页
Journal of Xidian University
基金
"863"计划资助(2006AA01Z444)
关键词
流媒体
信息隐藏
分层模型
性能优化
streaming media
information hiding
layered model
performance optimizing
