公开(公告)号：US20190335291A1

公开(公告)日：2019-10-31

申请号：US16471371

申请日：2017-12-15

Applicant: ORANGE

Inventor： Mathieu Baque ,  Alexandre Guerin

IPC: H04S7/00 ,  H04R3/04 ,  H04R5/04 ,  G10L21/0232

Abstract: A method implemented by a processing device for processing an ambisonic content including a plurality of ambisonic components of a plurality of orders defining a succession of ambisonic channels in each of which an ambisonic component is represented. The method includes: frequency filtering of the ambisonic components in a plurality of frequency bands, compiling an ambisonic decoding matrix, processing the ambisonic decoding matrix in order to extract, by matrix dimension reduction, a plurality of ambisonic decoding sub-matrices each associated with an ambisonic order and a frequency band selected for this ambisonic order, respective applications of the decoding sub-matrices to the ambisonic components in each selected frequency band, and a reconstruction, band by band, of the results of said respective applications, in order to deliver a plurality of decoded signals, each associated with a sound source.

公开(公告)号：US20240212701A1

公开(公告)日：2024-06-27

申请号：US18553378

申请日：2022-03-18

Applicant: Orange

Inventor： Alexandre Guerin ,  Henrique Tomaz-Amorim

IPC: G10L21/0208 ,  G10L21/0216

CPC classification number: G10L21/0208 ,  G10L2021/02166

Abstract: A method and apparatus for processing sound data acquired by a plurality of microphones. The method includes: on the basis of the signals acquired by the plurality of microphones, determining a direction of arrival of a sound originating from at least one sound source of interest; applying spatial filtering to the sound data as a function of the direction of arrival of the sound; estimating ratios, in the time-frequency domain, in a magnitude representative of a signal amplitude, between the filtered sound data on the one hand and the acquired sound data on the other hand; and as a function of the estimated ratios, producing a weight mask to be applied in the time-frequency domain to the acquired sound data in order to construct an acoustic signal representing the sound originating from the source of interest but enhanced relative to the ambient noise.

公开(公告)号：US20200152222A1

公开(公告)日：2020-05-14

申请号：US16620314

申请日：2018-05-24

Applicant: ORANGE

Inventor： Mathieu Baque ,  Alexandre Guerin

IPC: G10L21/0308 ,  G10L25/84 ,  H04R5/02

Abstract: A method for processing sound data for separating N sound sources of a multichannel sound signal sensed in a real medium. The method includes: separating sources to the sensed multichannel signal and obtaining a separation matrix and a set of M sound components, with M≥N; calculating a set of bi-variate first descriptors representative of statistical relations between the components of the pairs of the set obtained of M components, calculating a set of uni-variate second descriptors representative of characteristics of encoding of the components of the set obtained of M components; and classifying the components of the set of M components, according to two classes of components, a first class of N direct components corresponding to the N direct sound sources and a second class of M−N reverberated components, by calculating probability of membership in one of the two classes, dependent on the sets of first and second descriptors.

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：US11081126B2

公开(公告)日：2021-08-03

申请号：US16620314

申请日：2018-05-24

Applicant: ORANGE

Inventor： Mathieu Baque ,  Alexandre Guerin

IPC: G10L21/0308 ,  G10L21/0272 ,  G10L25/84 ,  H04R5/02

Abstract: A method for processing sound data for separating N sound sources of a multichannel sound signal sensed in a real medium. The method includes: separating sources to the sensed multichannel signal and obtaining a separation matrix and a set of M sound components, with M≥N; calculating a set of bi-variate first descriptors representative of statistical relations between the components of the pairs of the set obtained of M components, calculating a set of uni-variate second descriptors representative of characteristics of encoding of the components of the set obtained of M components; and classifying the components of the set of M components, according to two classes of components, a first class of N direct components corresponding to the N direct sound sources and a second class of M−N reverberated components, by calculating probability of membership in one of the two classes, dependent on the sets of first and second descriptors.

公开(公告)号：US10687164B2

公开(公告)日：2020-06-16

申请号：US16471371

申请日：2017-12-15

Applicant: ORANGE

Inventor： Mathieu Baque ,  Alexandre Guerin

IPC: H04S7/00 ,  G10L21/0232 ,  H04R3/04 ,  H04R5/04 ,  G10L21/0216

Abstract: A method implemented by a processing device for processing an ambisonic content including a plurality of ambisonic components of a plurality of orders defining a succession of ambisonic channels in each of which an ambisonic component is represented. The method includes: frequency filtering of the ambisonic components in a plurality of frequency bands, compiling an ambisonic decoding matrix, processing the ambisonic decoding matrix in order to extract, by matrix dimension reduction, a plurality of ambisonic decoding sub-matrices each associated with an ambisonic order and a frequency band selected for this ambisonic order, respective applications of the decoding sub-matrices to the ambisonic components in each selected frequency band, and a reconstruction, band by band, of the results of said respective applications, in order to deliver a plurality of decoded signals, each associated with a sound source.