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1. WO2020178256 - APPARATUS AND METHOD FOR AUDIO ANALYSIS

Publication Number WO/2020/178256
Publication Date 10.09.2020
International Application No. PCT/EP2020/055474
International Filing Date 02.03.2020
IPC
H04S 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
3Systems employing more than two channels, e.g. quadraphonic
G01S 3/80 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
80using ultrasonic, sonic, or infrasonic waves
G06F 3/0481 2013.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
048Interaction techniques based on graphical user interfaces
0481based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
H04S 7/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
7Indicating arrangements; Control arrangements, e.g. balance control
G06F 3/147 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
14Digital output to display device
147using display panels
G06F 3/16 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
16Sound input; Sound output
CPC
G01S 3/8034
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
80using ultrasonic, sonic or infrasonic waves
802Systems for determining direction or deviation from predetermined direction
803using amplitude comparison of signals derived from receiving transducers or transducer systems having differently-oriented directivity characteristics
8034wherein the signals are derived simultaneously
G06F 3/147
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
14Digital output to display device; ; Cooperation and interconnection of the display device with other functional units
147using display panels
G06F 3/167
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
16Sound input; Sound output
167Audio in a user interface, e.g. using voice commands for navigating, audio feedback
H04R 2430/20
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2430Signal processing covered by H04R, not provided for in its groups
20Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic
H04R 29/001
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
29Monitoring arrangements; Testing arrangements
001for loudspeakers
H04S 2400/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS 
2400Details of stereophonic systems covered by H04S but not provided for in its groups
11Positioning of individual sound objects, e.g. moving airplane, within a sound field
Applicants
  • A-VOLUTE [FR]/[FR]
Inventors
  • BAELDE, Maxime
  • SOUVIRAA-LABASTIE, Nathan
  • GREFF, Raphaël
Agents
  • REGIMBEAU
Priority Data
19305251.104.03.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPARATUS AND METHOD FOR AUDIO ANALYSIS
(FR) APPAREIL ET PROCÉDÉ D'ANALYSE AUDIO
Abstract
(EN)
An apparatus comprises a receiver (201) receiving a multi-channel audio signal representing audio for a scene. An extractor (203) extracts at least one directional audio component by applying a spatial filtering to the multi-channel signal where the spatial filtering is dependent on the multi-channel audio signal. A feature processor (205) determines a set of features for the first directional audio component and a categorizer (207) determines a first audio source category out of a plurality of audio source categories for the directional audio signal in response to the set of features. An assigner (209) assigns a first audio source property to the first directional audio component from a set of audio source properties for the first audio source category. The apparatus may provide very advantageous categorization and characterization of individual audio sources/ components present in a multi-channel signal. This may be advantageous e.g. for visualization of audio events.
(FR)
L'invention fait intervenir un appareil comportant un récepteur (201) recevant un signal audio multicanal représentant un contenu audio relatif à une scène. Un extracteur (203) extrait au moins une composante audio directionnelle en appliquant un filtrage spatial au signal multicanal, le filtrage spatial étant fonction du signal audio multicanal. Un processeur (205) de caractéristiques détermine un ensemble de caractéristiques pour la première composante audio directionnelle et un catégoriseur (207) détermine une première catégorie de sources audio parmi une pluralité de catégories de sources audio pour le signal audio directionnel en réponse à l'ensemble de caractéristiques. Un répartiteur (209) affecte une première propriété de source audio à la première composante audio directionnelle à partir d'un ensemble de propriétés de source audio pour la première catégorie de sources audio. L'appareil peut assurer une catégorisation et une caractérisation très avantageuses de sources/composantes audio individuelles présentes dans un signal multicanal. Ceci peut être avantageux p. ex. pour la visualisation d'événements audio.
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