Soft decision signal estimation
August 4, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNoise reduction system Adaptive noise cancellation and speech enhancement system and apparatus therefor Energy-based process for the detection of signals drowned in noise Noise reduction method and filter for implementing the method particularly useful in telephone communications systems Speech signal processing apparatus for detecting a speech signal from a noisy speech signal Adaptive speech filter Noise suppressor and method for suppressing background noise in noisy speech, and a mobile station Speech frame disabling circuitry for protection against burst errors of interleaved TDMA frames Method for reducing noise in speech signal and method for detecting noise domain Non-parametric voice activity detection Patent #: 6023674 InventorsApplicationNo. 368596 filed on 08/04/1999US Classes:704/233, Detect speech in noise704/226NoiseExaminersPrimary: Dorvil, RichemondAttorney, Agent or FirmForeign Patent References
International ClassG10L 021/02AbstractA method for signal detection uses a likelihood ratio derived from the received signal to produce an estimate of a speech signal that has been corrupted by noise during transmission. The received signal is input to a receiver filter and a voice-activity detector. The receiver filter filters the received signal to produce a filter output signal. The voice-activity detector generates a likelihood ratio based on the received signal, which is then used to produce a speech-probability estimate indicating the probability that the received signal includes a speech signal. The filter output signal is combined with the speech-probability estimate output from the voice-activity detector to generate a soft estimate of the original speech signal.Other References
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