A CELP-Speech Information Hiding Algorithm Based on Vector Quantization

摘要：

This paper presents a speech information-hiding scheme that is integrated with the CELP (Coded Exited Linear Prediction) speech coding method. The G.729 codec (CSACELP) is used to test the efficiency of this scheme. The indexconstrained method is applied for the secret information embedding. The selected bits of first-stage and residual vector indices during the Predictive Two-stage Vector Quantization procedure are modulated by the secret information bits. For the imperceptibility of this scheme, the quality of the watermarked speech signal can be controlled by adaptive embedding through referring to the original and watermarked speech. Experimental results show that this scheme can be effective and the distortion of the speech signal is trivial and imperceptible.

关键词： CELP information hiding vector quantization speech

作者: Ji-Xin Liu Zhe-Ming Lu Hao Luo

作者单位: Electronic and Communication Department Harbin Institute of Technology Shenzhen Graduate School,Shen School of Aeronautics and Aeronautics Zhejiang University,Hangzhou,China

会议类型: 国际会议

会议名称: The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)

会议地点: 西安

会议语种:英文

页码: 75-78

在线出版日期: 2009-08-18（万方平台首次上网日期，不代表论文的发表时间）