System for encoding voice with suppression of ruìdo integrated, and process for removing ruìdo in a voice encoder

摘要

"The system to encode voice with suppression of ruu00ecdo integrated, and,Process for removing ruu00ecdo in a voice encoder "a system to encode voice while suppressing background noise, acoustic and a process to suppress background noise acoustically in a code of VOZ are described here. The voice encoder includes a sampler that capture groups of samples in the time domain of an audio signal.A voice activity detector operatively coupled to the sampler determines the presence or absence of speech in a current group.A processor is operatively coupled to the sampler to transform the group of audio samples in the time domain into an estimate of the power spectrum of that group.A noise model adapter operatively associated with the processor updates a model of noise in the field of frequ00b3u00eancia based on estimation of power spectrum of this group theVoice activity detector indicates an absence of speech in this group.A block of filter operatively coupled to the computing model of the noise adapter and the transformed computes a spectral enhancement filter based on power spectrum estimation of P.Otu00eancia and noise model adapted.A block operatively coupled to the processor and spectral enhancement to the block of computing filter applies the filter to the current estimate of the spectrum spectral enhancement of potu00eanThe cla. A quantizador and block encoder transforms the parameters of model of voice codec, including spectral magnitudes intensified, in a group of coded bits.