公开(公告)号：US10557916B2

公开(公告)日：2020-02-11

申请号：US15773899

申请日：2016-11-07

Applicant: Squarehead Technology AS

Inventor： Ines Hafizovic ,  Stig Oluf Nyvold ,  Jon Petter Helgesen ,  Johannes Alming Daleng ,  Frode Berg Olsen

IPC: G10L15/02 ,  G01S5/02 ,  G01S5/20 ,  G06K9/00 ,  G06K9/32 ,  G06T7/73 ,  G06K9/62

Abstract: A system for detecting, classifying and tracking unmanned aerial vehicles (UAVs) comprising: at least one microphone array arranged to provide audio data; at least one camera arranged to provide video data; and at least one processor arranged to generate a spatial detection probability map comprising a set of spatial cells. The processor assigns a probability score to each cell as a function of: an audio analysis score generated by comparing audio data to a library of audio signatures; an audio intensity score generated by evaluating a power of at least a portion of a spectrum of the audio data; and a video analysis score generated by using an image processing algorithm to analyse the video data. The system is arranged to indicate that a UAV has been detected in one or more spatial cells if the associated probability score exceeds a predetermined detection threshold.

公开(公告)号：US11832051B2

公开(公告)日：2023-11-28

申请号：US17276271

申请日：2019-09-13

Applicant: Squarehead Technology AS

Inventor： Ines Hafizovic ,  Trond Berg ,  Stig Nyvold

IPC: H04R3/00 ,  H04R1/40

CPC classification number: H04R1/406 ,  H04R3/005 ,  H04R2201/401 ,  H04R2201/405

Abstract: A system for capturing sound comprising a plurality of discrete microphones (112, 14, 116, 118) and a processing system (408). The plurality of discrete microphones are arranged in a circular array. The processing system (408) arranged to perform a first signal processing algorithm on sound originating from one or more of a first set of directions relative to the array to isolate a first sound source. The processing system (408) is further arranged to perform a second signal processing algorithm on sound originating from one or more of a second set of directions relative to the array to isolate a second sound source therein. A method for receiving sound at a plurality of discrete microphones (112, 114, 116, 118) arranged in a circular array is also described.