中文摘要：

在秘密通讯采用的信息躲技术应该满足高隐藏能力的要求，即时、高的坚韧性。为即时讲话的目的固定通讯，基于 analysis-by-synthesis (ABS ) 隐藏算法的一个信息讲话编码计划在这篇文章被介绍。这个算法在线性预兆的编码用秘密讲话数据位代替线性预兆的系数(LPC )(LPC ) 。统计证明表示信号轨道的变化是慢的，为 LPC 向量的电报密码本在编码计划的 ABS 大。因此，一个新概念，过滤器类似，被建议为与秘密讲话信息代替决定 LPC 参数，并且为节省存储空间存储秘密讲话信息产生多电报密码本。完成信息的最好的效果躲，动态阀值被造在隐藏能力，安全，坚韧性，透明和实时之中做一宗最佳的交易。实验证明建议途径满足躲的信息和秘密通讯讲话质量的要求。测试结果显示这接近高与优秀讲话质量隐藏能力并且复杂化说话者的识别的活动范围。

英文摘要：

Information hiding techniques adopted in secret communication should meet the requirements of high hiding capacity,real-time and high robustness.For the purpose of real-time speech secure communication,an information hiding algorithm based on the analysis-by-synthesis（ABS） speech coding scheme is presented in this article.This algorithm substitutes secret speech data bits for linear predictive coefficients（LPCs） in linear predictive coding（LPC）.Statistics show that the change of voiced signal track is slow and the codebook for LPCs vector is large in ABS coding scheme.Therefore,a new concept,filter similarity,is proposed to determine the LPC parameters for substituting with secret speech information,and to generate multi-codebook for saving storage space to store secret speech information.To achieve the best effects of information hiding,a dynamic threshold is built to make an optimal trade-off among hiding-capacity,security,robustness,transparence and real time.Experiments show that the proposed approach meets the requirements of information hiding and secret communication speech quality.The test results indicate that this approach reaches high hiding capacity with an excellent speech quality and complicating speakers＇ recognition.