Harmonic postprocessing off speech synthesised by stochastic coders
作者:
I.M.Trancoso,
J.M.Tribolet,
期刊:
IEE Proceedings I (Communications, Speech and Vision)
(IET Available online 1989)
卷期:
Volume 136,
issue 2
页码: 141-144
年代: 1989
DOI:10.1049/ip-i-2.1989.0018
出版商: IEE
数据来源: IET
摘要:
High quality speech coding at medium-to-low bit rates is presently one of the major goals in speech research. Stochatic coding represents an important step towards this objective. Yet, the quality of synthetic speech is still not always good enough. A subjectively important part of the distortion may arise from imperfect reproduction of voiced regions, where the harmonic structure is not as well marked in the synthetic signal as it is in the original speech signal. Postprocessing of synthetic signals using harmonic modelling arises as a natural solution to reduce this distortion. The disadvantages of this method in terms of additional delay, complexity and dependency on high precision pitch detectors can be well counterbalanced by the higher quality of resynthesised speech signals in voiced regions.
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