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Title:
ACOUSTIC ECHO CANCELLER OUTPUT VOICE SIGNAL POST-PROCESSING METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/024621
Kind Code:
A1
Abstract:
An acoustic echo canceller output voice signal post-processing method and apparatus, relating to the technical field of signal processing. The method comprises: obtaining a preset AEC output signal subband spectrum (11); performing weighted processing on the AEC output signal subband spectrum according to the processing criterion that the distortion error of near-end voice signal subband spectrum estimation is minimized on the condition that residual echo components of the AEC output signal subband spectrum are suppressed to a preset level, to obtain a liner estimation value of the near-end voice signal subband spectrum (12); and outputting the linear estimation value of the near-end voice signal subband spectrum (13). According to the method and apparatus, the distortion error of near-end voice signal subband spectrum estimation is minimized on the condition that the residual echo components of the AEC output signal subband spectrum are suppressed to the preset level, residual echo is effectively suppressed, and the stability of the full-duplex characteristic of a voice communication system is ensured.

Inventors:
LIANG, Min (No.40 Xueyuan Rd, Haidian District, Beijing 1, 100191, CN)
Application Number:
CN2018/092157
Publication Date:
February 07, 2019
Filing Date:
June 21, 2018
Export Citation:
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Assignee:
CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY (No.40 Xueyuan Rd, Haidian District, Beijing 1, 100191, CN)
International Classes:
G10L21/0208; H04M9/08; H04R3/02
Foreign References:
CN107749303A2018-03-02
CN101778183A2010-07-14
CN102387272A2012-03-21
CN106878575A2017-06-20
CN105338450A2016-02-17
CN1736039A2006-02-15
Attorney, Agent or Firm:
DRAGON INTELLECTUAL PROPERTY LAW FIRM (10F Bldg. 2, Maples International CenterNo. 32 Xizhimen North Street, Haidian District, Beijing 2, 100082, CN)
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