| 摘要 |
This invention provides designs for systems that reduce or remove noise from noisy speech signals. These systems are based on adaptive predictors that can self-adjust to variations in speech signals within a fraction of the duration of a spoken word. Signal-to-noise ratio is improved, and speech intelligibility is enhanced. Detectability of human speech in noise is further increased by cascading two adaptive predictors, and removal of both periodic and wideband noise from noisy speech can be accomplished by cascading an adaptive narrowband noise canceller with an adaptive predictor. Applications are to hearing aids and hearing devices, and to speech communication systems that must work in noisy environments.
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