公开(公告)号：US11538486B2

公开(公告)日：2022-12-27

申请号：US17075659

申请日：2020-10-20

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Dong Shi ,  Kai Li ,  Hannes Muesch ,  David Gunawan ,  Paul Holmberg ,  Glenn N. Dickins

IPC: G10L21/0232 ,  H04R3/02 ,  G10L21/0264 ,  H04R3/04 ,  G10L21/0208 ,  H04R27/00

Abstract: Methods for echo estimation or echo management (echo suppression or cancellation) on an input audio signal, with at least one of adaptation of a sparse prediction filter set, modification (for example, truncation) of adapted prediction filter impulse responses, generation of a composite impulse response from adapted prediction filter impulse responses, or use of echo estimation and/or echo management resources in a manner determined at least in part by classification of the input audio signal as being (or not being) echo free. Other aspects are systems configured to perform any embodiment of any of the methods.

公开(公告)号：US11277518B2

公开(公告)日：2022-03-15

申请号：US16640169

申请日：2018-09-27

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kai Li ,  David Gunawan ,  Feng Deng ,  Qianqian Fang

IPC: H04M3/56 ,  G10L25/48

Abstract: The disclosed teleconferencing methods involve detecting a howl state during a teleconference which involves two or more teleconference client locations and a teleconference server. The teleconference server is configured for providing full-duplex audio connectivity between the teleconference client locations. The howl state is a state of acoustic feedback involving two or more teleconference devices in a teleconference client location. Detecting the howl state involves an analysis of both spectral and temporal characteristics of teleconference audio data. The disclosed teleconferencing methods involve determining which client location is causing the howl state and involve mitigating the howl state or sending a howl state detection message.

公开(公告)号：US10811027B2

公开(公告)日：2020-10-20

申请号：US16308761

申请日：2017-06-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Dong Shi ,  Kai Li ,  Hannes Muesch ,  David Gunawan ,  Paul Holmberg ,  Glenn N. Dickins

IPC: H04R27/00 ,  H04R3/02 ,  G10L21/0208 ,  G10L21/0232 ,  G10L21/0264 ,  H04R3/04

Abstract: Methods for echo estimation or echo management (echo suppression or cancellation) on an input audio signal, with at least one of adaptation of a sparse prediction filter set, modification (for example, truncation) of adapted prediction filter impulse responses, generation of a composite impulse response from adapted prediction filter impulse responses, or use of echo estimation and/or echo management resources in a manner determined at least in part by classification of the input audio signal as being (or not being) echo free. Other aspects are systems configured to perform any embodiment of any of the methods.

公开(公告)号：US09917952B2

公开(公告)日：2018-03-13

申请号：US15474823

申请日：2017-03-30

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Kai Li ,  Doh-Suk Kim

IPC: H04M3/56 ,  H04M3/22 ,  G10L25/48 ,  G10L25/87

CPC classification number: H04M3/568 ,  G10L25/48 ,  G10L25/60 ,  G10L25/87 ,  H04M3/2236

Abstract: Example embodiments disclosed herein relate to an evaluation of perceptual delay impact on a conversation. A method of evaluating perceptual delay impact on a conversation is disclosed. The method includes detecting a conversational event between a first participant and a second participant, the conversational event including a plurality of speech segments; in response to the conversational event being detected, obtaining at least one conversational parameter for the first and second participants, the at least one conversational parameter indicating a relationship between the plurality of speech segments in the conversational event; and determining a quality of the conversation according to a model based on the at least one conversational parameter, the model characterizing the quality with the at least one conversational parameter. A method of obtaining a model for evaluating perceptual delay impact on a conversation is also disclosed. Corresponding systems and computer program products are also disclosed.