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Patent Searching and Data


Title:
FILTER STATE DIVERGENCE JUDGEMENT METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/012350
Kind Code:
A1
Abstract:
A filter state divergence judgement method and device, which are used for solving the problems in the prior art that a filter state judgement method has a relatively high calculation complexity and has a possibility of misjudgement. The method comprises: acquiring a near-end signal and a far-end signal synchronized with the near-end signal (300), and respectively performing synchronous framing processing on the near-end signal and the far-end signal, so as to obtain N pairs of synchronous frames (310); filtering the N pairs of synchronous frames via a filter, so as to obtain a mean value of N filter coefficient vectors corresponding to the N pairs of synchronous frames (320); respectively calculating N filter coefficient state reference quantities corresponding to the N pairs of synchronous frames according to the mean value of the N filter coefficient vectors (330); and when at least M filter coefficient state reference quantities greater than a pre-set threshold value exist in the N filter coefficient state reference quantities, determining that the filter is in a divergent state (340). Therefore, whether a filter is in a divergent state can be effectively determined, and update of a filter coefficient vector can be controlled.

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Inventors:
SHLOMOT EYAL (US)
LIU YUANYUAN (CN)
LI HAITING (CN)
Application Number:
PCT/CN2016/075804
Publication Date:
January 26, 2017
Filing Date:
March 07, 2016
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03H21/00; H04B3/23; H04M1/20
Foreign References:
CN105141287A2015-12-09
CN101119135A2008-02-06
CN1242651A2000-01-26
CN101026392A2007-08-29
CN102377453A2012-03-14
CN103259563A2013-08-21
JP2003324370A2003-11-14
US8199927B12012-06-12
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
北京同达信恒知识产权代理有限公司 (CN)
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