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1. (WO2019024621) ACOUSTIC ECHO CANCELLER OUTPUT VOICE SIGNAL POST-PROCESSING METHOD AND APPARATUS
Latest bibliographic data on file with the International Bureau    Submit observation
Pub. No.: WO/2019/024621 International Application No.: PCT/CN2018/092157
Publication Date: 07.02.2019 International Filing Date: 21.06.2018
IPC:
G10L 21/0208 (2013.01) ,H04R 3/02 (2006.01) ,H04M 9/08 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21
Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02
Speech enhancement, e.g. noise reduction or echo cancellation
0208
Noise filtering
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
02
for preventing acoustic reaction
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
M
TELEPHONIC COMMUNICATION
9
Arrangements for interconnection not involving centralised switching
08
Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Applicants:
电信科学技术研究院有限公司 CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY [CN/CN]; 中国北京市 海淀区学院路40号 No.40 Xueyuan Rd., Haidian District Beijing 100191, CN
Inventors:
梁民 LIANG, Min; CN
Agent:
北京银龙知识产权代理有限公司 DRAGON INTELLECTUAL PROPERTY LAW FIRM; 中国北京市 海淀区西直门北大街32号院枫蓝国际中心2号楼10层 10F, Bldg. 2, Maples International Center No. 32 Xizhimen North Street, Haidian District Beijing 100082, CN
Priority Data:
201710640371.X31.07.2017CN
Title (EN) ACOUSTIC ECHO CANCELLER OUTPUT VOICE SIGNAL POST-PROCESSING METHOD AND APPARATUS
(FR) PROCÉDÉ ET APPAREIL DE POST-TRAITEMENT DE SIGNAL VOCAL DE SORTIE DE SUPPRESSEUR D'ÉCHO ACOUSTIQUE
(ZH) 一种声学回声抵消器输出语音信号的后处理方法及装置
Abstract:
(EN) 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.
(FR) La présente invention concerne un procédé et un appareil de post-traitement de signal vocal de sortie de suppresseur d'écho acoustique, concernant le domaine technique du traitement de signal. Le procédé comprend : l'obtention d'un spectre de sous-bande de signal de sortie AEC prédéfini (11); la conduite d'un traitement pondéré sur le spectre de sous-bande de signal de sortie AEC conformément au critère de traitement selon lequel l'erreur de distorsion d'estimation de spectre de sous-bande de signal vocal local est réduite au minimum à condition que les composantes d'écho résiduel du spectre de sous-bande de signal de sortie AEC soient supprimées à un niveau prédéfini, pour obtenir une valeur d'estimation linéaire du spectre de sous-bande de signal vocal local (12); et la délivrance en sortie de la valeur d'estimation linéaire du spectre de sous-bande de signal vocal d'extrémité proche (13). Selon le procédé et l'appareil, l'erreur de distorsion d'estimation de spectre de sous-bande de signal vocal local est réduite au minimum à condition que les composantes d'écho résiduel du spectre de sous-bande de signal de sortie AEC soient supprimées au niveau prédéfini, l'écho résiduel est efficacement supprimé, et la stabilité de la caractéristique de duplex intégral d'un système de communication vocale est assurée.
(ZH) 一种声学回声抵消器输出语音信号的后处理方法及装置，涉及信号处理技术领域。该方法包括：获取预设的AEC输出信号子带谱（11）；依据将该AEC输出信号子带谱中残留回声分量抑制到预设电平的条件下使近端语音信号子带谱估计的失真误差最小化的处理准则，对该AEC输出信号子带谱进行加权处理，获取近端语音信号子带谱的线性估计值（12）；输出该近端语音信号子带谱的线性估计值（13）。该方法及装置通过将该AEC输出信号子带谱中残留回声分量抑制到预设电平的条件下以使近端语音信号子带谱估计的失真误差最小化，有效抑制了残留回声，保证了语音通信系统的全双工特性的稳定性。
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African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)