Sixth European Conference on Speech Communication and Technology
(EUROSPEECH'99)

Budapest, Hungary
September 5-9, 1999

Using Adaptive Signal Limiter together with Noise-Robust Techniques for Noisy Speech Recognition

Wei-Wen Hung, Hsiao-Chuan Wang

Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan

In a speech recognition system, environmental mismatch between speech models and test speech causes serious performance degradation. To solve this environmental mismatch problem, smoothing process is one of the most widely used techniques. In this paper, an adaptive signal limiter (ASL) is developed to smooth speech features so that the undesired spectral variations could be effectively reduced. In addition, we propose the method for combining ASL with other noise-robust techniques in the recognition of noisy speech.


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Bibliographic reference.  Hung, Wei-Wen / Wang, Hsiao-Chuan (1999): "Using adaptive signal limiter together with noise-robust techniques for noisy speech recognition", In EUROSPEECH'99, 2491-2494.