Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for feedback control for in-car communications

By generating and adjusting the maximum forward path frequency-dependent gain between the speaker and microphone, the problem of noise interference and feedback in the vehicle is solved, and stable voice communication and sound effects are achieved.

Active Publication Date: 2018-09-18
BLACKBERRY LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Feedback generated by these systems can be reprocessed, feeding the signal back onto itself and, if left unchecked, result in a ringing or howling that can cause driver and occupant discomfort

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In-vehicle communication systems and methods (referred to herein as systems or ICC systems) improve voice communication between occupants by enhancing the desired signal. One or more microphone signals are processed and broadcast from the speakers in the car to reinforce these desired signals. This feature allows the driver, co-driver, and other occupants to communicate with each other even in noisy conditions, without having to raise their voice or cause distraction. Some systems utilize existing hardware wired and wireless communication systems in the vehicle, which can include in-car microphones and infotainment speakers, making the system an integral part of the vehicle in some applications, and in other systems, the system As an independent system attached to or separated from the vehicle. Each of these systems adds features that improve seat-to-seat or zone-to-zone communication through feedback mitigation. Some systems include one or more optional noise reductio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A system and method (referred to as the system) that mitigates feedback in an audio system that adjust voice signals in a vehicle. The system generates transfer function estimates from multiple loudspeakers to multiple microphones and generates maximum forward path frequency-dependent gains based on the transfer function estimates and a frequency-dependent tuning factor for each of the loudspeakers to each of the microphones. The system generates forward path frequency-dependent gains independently that are applied to multiple loudspeaker signals, each of the loudspeaker signals drive one of the loudspeakers, respectively. The forward path frequency-dependent gains are adjusted based on the maximum forward path frequency-dependent gains.

Description

Technical field [0001] The present disclosure relates to processing audio signals, and in particular, to systems and methods that enhance speech and reduce feedback. Background technique [0002] The noise in the vehicle makes it difficult for the driver and occupants to communicate. Noise may come from traffic, highways, the vehicle itself, or other sources. In order to improve the communication in the car, some systems increase the voice signal level to overcome the noisy environment. The feedback generated by these systems can be reprocessed to feed back the signal to itself, and if left uncontrolled, it can cause humming or howling that can cause discomfort to the driver and occupants. The disclosed in-vehicle communication system alleviates this problem and dynamically improves the in-vehicle acoustics. Summary of the invention [0003] According to an aspect of the present disclosure, there is provided a method for alleviating feedback in an audio system that adjusts audi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0208G10L21/0216H04M9/08H04R3/12
CPCG10L21/0208G10L21/0216H04M9/082H04R3/12G10L2021/02087G10L2021/02082H04R2499/13H04R3/02H04R3/005H04R3/04H04R2430/01
Owner BLACKBERRY LTD