US 12,436,227 B2
Methods and apparatus to adjust time difference of arrival distance values used for source localization
Jacek Ossowski, Gdansk (PL); Marek Dabek, Gdansk (PL); Pawel Obszarski, Gdansk (PL); and Krzysztof Pawlak, Gdynia (PL)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Sep. 23, 2021, as Appl. No. 17/483,639.
Prior Publication US 2022/0011400 A1, Jan. 13, 2022
Int. Cl. G01S 5/30 (2006.01); G01S 5/20 (2006.01); G01S 5/22 (2006.01); G01S 7/539 (2006.01); G01S 15/87 (2006.01)
CPC G01S 5/30 (2013.01) [G01S 5/20 (2013.01); G01S 5/22 (2013.01); G01S 7/539 (2013.01); G01S 15/876 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus to determine a location of an audio source, the apparatus comprising:
at least one memory;
machine readable instructions; and
at least one programmable circuit to be programmed by the machine readable instructions to:
before determination of the location of the audio source, determine error values corresponding respectively to first time difference of arrival (TDOA) distance values between different pairs of acoustic sensors in a plurality acoustic sensors, the error values based on a cost function, a first set of constraints associated with respective groups of three of the pairs of acoustic sensors, and a second set of constraints associated with individual ones of the pairs of acoustic sensors;
before determination of the location of the audio source, adjust ones of the first TDOA distance values based on corresponding ones of the error values to determine second TDOA distance values, a first one of the second TDOA distance values based on a first one of the first TDOA distance values and a first one of the error values that corresponds to the first one of the first TDOA distance values; and
output the second TDOA distance values to source location circuitry that is to determine the location of the audio source.