US 9,812,148 B2  
Estimation of noise characteristics  
David C Bradley, La Jolla, CA (US); and Yao Morin, San Diego, CA (US)  
Assigned to KNUEDGE, INC., San Diego, CA (US)  
Filed by KNUEDGE, INC., San Diego, CA (US)  
Filed on Sep. 22, 2015, as Appl. No. 14/860,999.  
Claims priority of provisional application 62/128,212, filed on Mar. 4, 2015.  
Claims priority of provisional application 62/112,791, filed on Feb. 6, 2015.  
Prior Publication US 2016/0232919 A1, Aug. 11, 2016  
Int. Cl. H04B 15/00 (2006.01); G10L 21/0216 (2013.01); G10L 21/0264 (2013.01) 
CPC G10L 21/0216 (2013.01) [G10L 21/0264 (2013.01)]  25 Claims 
1. A computerimplemented method, the method comprising: receiving first data, the first data comprising a sequence of data
points; determining a total number of data points included in the first data; determining a first threshold;
determining, for the first threshold, a first plurality of runs in the sequence of data points, wherein a run in the first
plurality of runs is associated with a transition corresponding to consecutive data points being above and below the first
threshold; determining a second threshold;
determining, for the second threshold, a second plurality of runs in the sequence of data points, wherein a run in the second
plurality of runs is associated with a transition corresponding to consecutive data points being above and below the second
threshold;
determining a first value of a cumulative distribution function using a total number of the first plurality of runs;
determining a second value of the cumulative distribution function using a total number of the second plurality of runs;
determining the cumulative distribution function using the first value and the second value and;
estimating a noise variance using the first value and the second value of the cumulative distribution function.
