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Acoustic echo cancellation system

A technology of echo cancellation and echo, which is applied in transmission systems, wired transmission systems, two-way sound reinforcement telephone systems, etc., and can solve problems such as communication discomfort and lower communication quality

Active Publication Date: 2014-06-11
QUANTA COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the echo is transmitted back from the near-end microphone to the far-end, it will significantly reduce the communication quality and cause discomfort in communication

Method used

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  • Acoustic echo cancellation system
  • Acoustic echo cancellation system

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Embodiment Construction

[0031] In the embodiment of this application, when performing Acoustic Echo Cancellation (AEC), the sound signal containing the echo received by the near-end device and the far-end sound signal temporarily stored by the near-end device are sent back to the Server, echo cancellation is performed by the server. In this way, adverse effects caused by transmission delay of the sound signal during network transmission can be reduced. It should be noted that in this embodiment, the near-end device does not need to perform echo cancellation, and the far-end device does not need to perform echo cancellation either.

[0032] Please refer now figure 1 , which shows a schematic diagram of an echo cancellation system according to an embodiment of the present application. Such as figure 1 As shown, the echo cancellation system 100 includes: a remote device 105 , a local device 135 and a server 170 . The remote device 105 includes a remote user device 110 , a remote audio extraction dev...

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Abstract

An acoustic echo cancellation (AEC) system includes a remote device for capturing a remote captured sound; a server coupled to the remote device; and a local device coupled to the server. The server transmits the remote captured sound from the remote device to the local device. The local device receives, stores and plays the remote captured sound as a local playback sound. An echo is generated from reflection of the local playback sound. The local device captures the echo and a local sound into a local captured sound, and transmits both the remote captured sound and the local captured sound to the server. The server performs AEC on the local captured sound by using the remote captured sound from the local device and transmits the AEC processed local captured sound to the remote device.

Description

technical field [0001] The present disclosure relates to an echo cancellation system. Background technique [0002] Echo affects the sound quality of communications. In general, echoes include short echoes and long echoes. When the far-end voice is emitted by the near-end speaker, the sound wave emitted by the near-end speaker can be directly transmitted to the microphone (short echo), or the sound wave emitted by the near-end speaker can be reflected in the room and then transmitted. to the microphone (Long echo). When the echo is transmitted back from the near-end microphone to the far-end, the communication quality will be significantly reduced, resulting in uncomfortable communication. Contents of the invention [0003] Embodiments of the present disclosure relate to an acoustic echo cancellation (Acoustic Echo Cancellation (AEC)) system. , to reduce the adverse effects caused by network transmission delay. [0004] Another embodiment of the present disclosure rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M9/08
CPCH04B3/23H04M9/082
Inventor 黄国钧郑楷儒陈荣坤罗仕翔
Owner QUANTA COMPUTER INC
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