基于WSOLA 算法的语音时长调整研究

基于WSOLA 算法的语音时长调整研究

目前的PSOLA 算法进行时长调整时, 其计算量大, 很难实现实时变速不变调处理。利用波形相似性来解决语音时长调整的WSOLA 算法, 实验证明能生成高品质的语音; 在算法上高效、鲁棒, 可以通过修改调整因子α实现连续范围内的在线语音时长调整。此算法已应用在数字语音教学系统中, 具有良好的实时性和高品质语音。

PSOLA, a popular algorithm for time-scale modification, has heavy computation, which is very difficult for onling operation. Waveform similarity is proposed for tackling the problem of time-scale modification of speech, which is called WSOLA algorithm, through experiments produces the high quality speech output, is algorithmically and computationally efficient and robust, and allows for on-ling processing with arbitrary time-scaling actors chosen over a wide continuous range of values. The algorithm has already been used in the tutoring system of the digital speech, having good real-time quality and high quality speech.