公开(公告)号：US20230026881A1

公开(公告)日：2023-01-26

申请号：US17769540

申请日：2020-10-05

申请人： ORANGE

发明人： Jérome Daniel ,  Srdan Kitic

IPC分类号： G01S3/802 ,  H04R1/32

摘要： 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：US12025720B2

公开(公告)日：2024-07-02

申请号：US17769540

申请日：2020-10-05

申请人： ORANGE

发明人： Jérome Daniel ,  Srdan Kitic

IPC分类号： G01S3/802 ,  H04R1/32

CPC分类号： G01S3/8027 ,  H04R1/326 ,  H04R2430/20

摘要： 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：US20240012093A1

公开(公告)日：2024-01-11

申请号：US18251967

申请日：2021-10-15

申请人： Orange

发明人： Jérome Daniel ,  Srdan Kitic

IPC分类号： G01S5/22

CPC分类号： G01S5/22

摘要： 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.