Patent ID: 9107010
Filing Date: 2015-08-11
Classification: G10K,G10L,H04R

Abstract:
1. A root mean square (RMS) detector detecting an RMS level of a background noise input signal while being substantially immune to voice, wind, scratch sounds, and any spike noise, the RMS detector comprising: a raw rms detector receiving a background noise input signal and outputting a raw rms value; a minimum rms tracker receiving the raw rms value and tracking a minimum rms value of the raw rms value; a normalized distance tracker receiving the minimum rms value and calculating a distance value between the minimum rms value and a previous corrected RMS value; a normalized smoothing factor calculator normalizing a smoothing factor by dividing the smoothing factor by a maximum of the distance value or 1; and an RMS value calculator determining a corrected RMS value from the minimum rms value, a previous corrected RMS value, and the normalized smoothing factor, and outputting a corrected RMS value.