EVALUATING DIRECTION OF ARRIVAL OF SIGNAL USING WATERMARKED AUDIO SIGNALS AND ARRAY OF MICROPHONES Russian patent published in 2016 - IPC G01S3/80 

FIELD: physics.

SUBSTANCE: invention discloses a method of providing direction information based on a reproduced audio signal with an embedded watermark and a device therefor, a method of estimating spatial position and a device therefor, a computer-readable medium having a computer program for executing the methods. The method of providing direction information and the method of estimating spatial position include the following steps: receiving watermarked audio signals, each recorded watermarked audio signal comprising an embedded watermark; processing at least two recorded watermarked audio signals recorded by at least two audio receivers at different spatial positions to determine phase information as receiver-specific information for each recorded watermarked audio signal; the receiver-specific information depends on the embedded watermarks embedded in the recorded watermarked audio signals; and providing direction information based on the receiver-specific information for each recorded watermarked audio signal. The method of estimating spatial position further includes a step of estimating the position of an array of at least two audio receivers. The position is determined based on the direction information.

EFFECT: providing more accurate determination of the direction of arrival of a transmission signal and more accurate estimation of spatial position.

16 cl, 22 dwg