US 12,267,463 B2
Double talk detectors
Srikanth Kuthuru, Palo Alto, CA (US); and Sunil Bharitkar, Palo Alto, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/919,059
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Apr. 15, 2020, PCT No. PCT/US2020/028298
§ 371(c)(1), (2) Date Oct. 14, 2022,
PCT Pub. No. WO2021/211113, PCT Pub. Date Oct. 21, 2021.
Prior Publication US 2023/0171346 A1, Jun. 1, 2023
Int. Cl. H04M 9/08 (2006.01); H04B 3/23 (2006.01)
CPC H04M 9/082 (2013.01) [H04B 3/234 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an adaptive filter to calculate a transfer function with coefficients for a particular time that is applied to an output signal of a microphone to cancel echoes caused by a reference signal in the output signal of the microphone; and
a double talk detector in communication with the adaptive filter, wherein the double talk detector is to:
determine a peak of the coefficients;
detect double talk based on a location of the peak of the coefficients; and
transmit a pause signal to the adaptive filter in response to detection of the double talk, wherein the pause signal is to pause a calculation of updates to the coefficients by the adaptive filter.