公开(公告)号：US12025720B2

公开(公告)日：2024-07-02

申请号：US17769540

申请日：2020-10-05

Applicant: ORANGE

Inventor： Jérome Daniel ,  Srdan Kitic

IPC: G01S3/802 ,  H04R1/32

CPC classification number: G01S3/8027 ,  H04R1/326 ,  H04R2430/20

Abstract: Processing sound signals acquired by a microphone, for example an ambisonic type, to locate a sound source in a space including at least one wall. A time-frequency transform is applied to the acquired signals, and, from the acquired signals, a velocity vector, complex with real and imaginary parts, is expressed in the frequency domain, wherein the velocity vector characterizes a composition between: a first acoustic path, direct between the source and the microphone, represented by a first vector; and a second acoustic path resulting from a reflection on the wall and represented by a second vector. The second path has a first delay with respect to the direct path. Depending on the first delay and the first and second vectors, a parameter is determined from among a direction of the direct path, a distance from the source to the microphone, and a distance from the source to said wall.

公开(公告)号：US11646048B2

公开(公告)日：2023-05-09

申请号：US16973972

申请日：2019-06-07

Applicant: ORANGE

Inventor： Alexandre Guerin ,  Srdan Kitic ,  Arnaud Lefort

IPC: G10L25/51 ,  G01S3/80 ,  G10L21/14 ,  G10L25/18 ,  G10L25/21 ,  H04R1/40 ,  H04R3/00

CPC classification number: G10L25/51 ,  G01S3/8006 ,  G10L21/14 ,  G10L25/18 ,  G10L25/21 ,  H04R1/406 ,  H04R3/005

Abstract: Processing acoustic signals to detect sound sources in a sound scene. The method includes: obtaining a plurality of signals representative of the sound scene, captured by a plurality of microphones of predefined positions; based on the signals captured by the microphones and on the positions of the microphones, applying a quantization of directional measurements of sound intensity and establishing a corresponding acoustic activity map in a sound source localization space, the space being of dimension N; constructing at least one vector basis of dimension less than N; projecting the acoustic activity map onto at least one axis of the vector basis; and searching for at least one local peak of acoustic activity in the map projection, an identified local peak corresponding to the presence of a sound source in the scene.

公开(公告)号：US20240012093A1

公开(公告)日：2024-01-11

申请号：US18251967

申请日：2021-10-15

Applicant: Orange

Inventor： Jérome Daniel ,  Srdan Kitic

IPC: G01S5/22

CPC classification number: G01S5/22

Abstract: A method of processing audio signals acquired by at least one microphone to locate a sound source in a space having a wall. The method includes applying a time-frequency transform to the acquired signals and expressing a general complex velocity vector with a real part and an imaginary part in the frequency domain. The vector has a denominator with a component other than an omnidirectional component and characterizes a composition between: a first acoustic path, direct between the source and the microphone, represented by a first vector, and a second acoustic path resulting from a reflection on the wall and represented by a second vector. The second path has a delay relative to the direct path. A direction of the direct path, a distance from the source to the microphone, and/or a distance from the source to the wall is determined as a function of the delay and the vectors.

公开(公告)号：US20250159424A1

公开(公告)日：2025-05-15

申请号：US18839172

申请日：2023-02-13

Applicant: ORANGE

Inventor： Srdan Kitic ,  Jérôme Daniel

IPC: H04S7/00 ,  H04R1/32 ,  H04R5/027

Abstract: Processing sound signals acquired by at least one microphone, to locate a sound source emitting from a plurality of discrete positions at respective discrete points in time, in a space comprising at least one planar reflective surface. The method includes: obtaining: a first vector {right arrow over (u)}0(k) determining a direction of a first acoustic path, direct between the source and the microphone, a second vector {right arrow over (u)}n(k) representing a second acoustic path resulting from a specular reflection and arriving at the microphone, and a delay τn(k) of second path at the microphone, compared to the direct path; exploiting a property of the specular reflection according to which a Euclidean distance between two positions of the source at two discrete points in time is equal to a Euclidean distance between two respective positions of images of the source and derived from one or more same reflections, respectively at said two discrete points in time.

公开(公告)号：US20230026881A1

公开(公告)日：2023-01-26

申请号：US17769540

申请日：2020-10-05

Applicant: ORANGE

Inventor： Jérome Daniel ,  Srdan Kitic

IPC: G01S3/802 ,  H04R1/32

Abstract: Processing sound signals acquired by a microphone, for example an ambisonic type, to locate a sound source in a space including at least one wall. A time-frequency transform is applied to the acquired signals, and, from the acquired signals, a velocity vector, complex with real and imaginary parts, is expressed in the frequency domain, wherein the velocity vector characterizes a composition between: a first acoustic path, direct between the source and the microphone, represented by a first vector; and a second acoustic path resulting from a reflection on the wall and represented by a second vector. The second path has a first delay with respect to the direct path. Depending on the first delay and the first and second vectors, a parameter is determined from among a direction of the direct path, a distance from the source to the microphone, and a distance from the source to said wall.