Patent ID: 9111525
Filing Date: 2015-08-18
Classification: G10L

Abstract:
1. A processor-implemented method for encoding a plurality of audio signals, comprising: segmenting each of the plurality of audio signals into a plurality of audio signal segments; for each audio signal segment: determining a modeled signal segment approximation to the audio signal segment in accordance with a sinusoidal model to extract applicable sinusoidal parameters; subtracting the modeled signal segment approximation from the audio signal segment to generate a sinusoidal error signal; extracting spectral envelope parameters corresponding to a spectral envelope for the sinusoidal error signal in accordance with a spectral envelope model; and removing the spectral envelope for the sinusoidal error signal from the sinusoidal error signal to yield a residual noise signal comprising a whitened version of the sinusoidal error signal; summing a plurality of residual noise signals corresponding to the plurality of audio signals to yield a reference signal; and packaging the reference signal, the applicable sinusoidal parameters, and the spectral envelope parameters in an encoded audio data structure.