语音是人类语一言的声学表现，是人类交流信息最自然、最方便、最有效的手段。语音信号作为语言的载体，在不同的层面包含了很多信息。其中两个最重要的信息就是与语义相关的内容信息和说话人信息，其他的还有环境信息和传输介质等。与语义相关的内容信息包括语音所属的语种以及所代表的词语或语句信息-Voice is the human language of the acoustic performance of a word is the most natural of human information exchange, the most convenient and most effective means. Speech signal as the carrier of language in different dimensions of a lot of information. Two of the most important information is related with the semantic content of information and speaker information, and other environmental information and the transmission medium, such as. Associated with the semantic content of information including voice their languages, as well as represented by the words or expressions of information