METHOD AND SYSTEM FOR ACOUSTIC FEEDBACK CANCELLATION USING A KNOWN FULL BAND SEQUENCE
Systems and methods for acoustic feedback cancellation. One method includes transmitting, with a transceiver, a known full-band sequence at a first time. The method includes receiving, via a microphone, a received audio signal including a received copy of the known full-band sequence. The method inc...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | English French |
Published |
24.09.2020
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Systems and methods for acoustic feedback cancellation. One method includes transmitting, with a transceiver, a known full-band sequence at a first time. The method includes receiving, via a microphone, a received audio signal including a received copy of the known full-band sequence. The method includes filtering the received audio signal to generate a filtered audio signal, and detecting, based on the filtered audio signal, a second portable communication device in proximity to the portable communication device. The method includes, in response to detecting the second portable communication device, determining, based on the first time and filtered audio signal, an estimated loop delay. The method includes initializing an adaptive feedback cancellation filter based on the estimated loop delay and the plurality of estimated filter coefficients. The method includes determining a plurality of estimated filter coefficients based on the known full-band sequence and the received copy of the known full-band sequence.
L'invention concerne des systèmes et des procédés d'annulation de rétroaction acoustique. Un procédé consiste à transmettre, au moyen d'un émetteur-récepteur, une séquence pleine bande connue dans un premier temps. Le procédé consiste à recevoir, par l'intermédiaire d'un microphone, un signal audio reçu comprenant une copie reçue de la séquence pleine bande connue. Le procédé consiste à filtrer le signal audio reçu afin de générer un signal audio filtré, et à détecter, sur la base du signal audio filtré, un second dispositif de communication portable à proximité du dispositif de communication portable. Le procédé consiste, en réponse à la détection du second dispositif de communication portable, à déterminer, sur la base du premier temps et du signal audio filtré, un retard de boucle estimé. Le procédé consiste à initialiser un filtre d'annulation de rétroaction adaptative sur la base du retard de boucle estimé et de la pluralité des coefficients de filtre estimés. Le procédé consiste à déterminer une pluralité de coefficients de filtre estimés sur la base de la séquence pleine bande connue et de la copie reçue de la séquence pleine bande connue. |
---|---|
Bibliography: | Application Number: WO2020US21904 |