US 12,132,458 B2
Long-term signal estimation during automatic gain control
Jianglong Li, Hangzhou (CN); Yu Rao, Sunnyvale, CA (US); and Yangzhong Wang, Suzhou (CN)
Assigned to Zoom Video Communications, Inc., San Jose, CA (US)
Filed by Zoom Video Communications, Inc., San Jose, CA (US)
Filed on Nov. 22, 2023, as Appl. No. 18/517,140.
Application 18/517,140 is a continuation of application No. 17/573,628, filed on Jan. 11, 2022, granted, now 11,863,143.
Application 17/573,628 is a continuation of application No. 17/187,773, filed on Feb. 27, 2021, granted, now 11,258,416, issued on Feb. 22, 2022.
Claims priority of application No. 202110179609.X (CN), filed on Feb. 8, 2021.
Prior Publication US 2024/0088856 A1, Mar. 14, 2024
Int. Cl. H03G 3/30 (2006.01); H04R 3/00 (2006.01)
CPC H03G 3/3005 (2013.01) [H04R 3/00 (2013.01); H04R 2420/05 (2013.01); H04R 2430/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating a long-term signal level estimate, comprising:
receiving an input signal comprising feed data, the input signal derived from an upstream input signal;
selecting a first subset of the feed data;
dividing the first subset of the feed data into a plurality of analysis intervals;
calculating a statistical average of each analysis interval;
generating a first Gaussian distribution based on the statistical average of each analysis interval of the plurality of analysis intervals;
determining the long-term signal level estimate based on one or more characteristics of the first Gaussian distribution;
generating a first stage gain based on the long-term signal level estimate; and
applying the first stage gain to the input signal.