This paper presents a very low bit rate speech vocoder based on phoneme HMM, discusses the theory and method of the vocoder, and reports on the result of experiments.

The theory and parameter estimation method to stochastic trajectory models based on phoneme;

In this paper,based on Mandarin acoustic characteristics,an overlapped segmenting scheme is presented and wavelets are used to segment phoneme.

Some phonemes in English can produce sound effects in assisting and enhansing meaning expression.

We explored the effect of the encoding ways and the visibility of phonemes on the hearing-normal university students in their phonetic identification, and yielded the following results in the experiment: The interaction of the encoding ways and the visibility of phonemes were found to be significant in correctness, and response time.

From English phonemes,sound-change and intonation,the author tries to explain why English phonetics can be of great importance to English learning,proving that phonetics teaching is the first step of enhancing communication ability,suggesting that the teaching of English phonetics which has the basic position in English should be stressed in the whole of English teaching .

The study investigated and analyzed English majors pronunciation ability in Spoken English Test in TEM-4 by examining four aspects of phoneme pronunciation,the use of weak forms,linking and deplosives.