Patent ID: 9343078
Filing Date: 2016-05-17
CPC Classification: G10L

Claim Text:
1. An audio processing apparatus, comprising: a first signal processing component, that introduces a gain into a reference signal to generate a first signal, wherein the first signal is directly coupled to a speaker in an acoustic path, wherein said first signal is clipped due to saturation of said first signal processing component when performing power amplification to introduce said gain; a pre-processing component, coupled to the first signal processing component to get the gain, wherein the pre-processing component transforms said reference signal into a non-linear input signal by applying said gain to said reference signal, and wherein said non-linear input signal is also clipped to approximate said saturation, and wherein said pre-processing component is programmed with knowledge of said gain and saturation threshold of said first signal processing component, and wherein when said first signal exceeds said saturation threshold, said pre-processing component holds amplitude of said non-linear input signal constant; and a filter, coupled to the pre-processing component, that filters said non-linear input signal to generate an output signal.