The speech sounds data base with labeling information is very important in the recognition of speech sounds.

附加标注信息的语音数据库在语音识别研究中的作用十分重要。

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Owing to the lack of telephone speech data, this paper proposes a software simulation implementation of converting clean speech sounds into telephone-quality ones.

针对电话语料比较缺乏的问题，提出了一种完全由软件模拟实现由纯净语音向电话质量语音转换的算法。

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