Publications – Details
New Speech Enhancement Techniques for Low Bit Rate Speech Coding
- Authors:
- Rainer Martin and Richard V. Cox
- Book Title:
- Proceedings of IEEE Workshop on Speech Coding (SCW)
- Venue:
- Porvoo, Finland
- Date:
- June 1999
- Pages:
- 165–167
- Language:
- English
Abstract
In this paper we present novel solutions for preprocessing noisy speech prior to low bit rate speech coding. We strive especially to improve the estimation of spectral parameters and to reduce the additional algorithmic delay caused by the enhancement preprocessor. While the former is achieved using a new adaptive limiting algorithm for the a priori signal-to-noise ratio (SNR) estimate, the latter makes use of a novel overlap/add scheme. Our enhancement techniques were evaluated in conjunction with the 2400 bps MELP coder by means of formal and informal listening tests.
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