信息隐藏是20世纪90年代逐步兴起的研究课题。语音信号的不特定的静音间隔使得它比较于音乐等其他音频信号缺少了很大的隐藏空间,而语音信号的信息隐藏在Internet和有线与无线电话信道又有着很好的应用前景。提出一种语音信号的信息隐藏算法，能够在MFCC参数中隐藏秘密消息，语音的短时能量具有的较强的稳定性，可以保证隐藏和提取时的帧的同步，使得对应的提取算法可以准确地从隐藏的语音中恢复出信息。本方法可以适用于Internet信道和局域网络或高速网络中的语音应用。

Information hiding has been a research problem since 1990’s. Random silent gap of speech signal makes less hiding space for speech than space for other audio signals such as music although information hiding in speech has very good prospective in Internet or any other wire/wireless channel. This paper provides an information hiding method in MFCC for speech signal. Because short time energy of speech is more invariable and can ensure the synchrony of frame in hiding and extracting, it makes extracting algorithm restore the secret from hided speech signal correctly. This method can be used in application of Internet or LAN channel with high speed transmission.