发明名称 |
DETERMINING THE INTER-CHANNEL TIME DIFFERENCE OF A MULTI-CHANNEL AUDIO SIGNAL |
摘要 |
There is provided a method and device for determining an inter-channel time difference of a multi-channel audio signal having at least two channels. A set of local maxima of a cross-correlation function involving at least two different channels of the multi-channel audio signal is determined (S1) for positive and negative time-lags, where each local maximum is associated with a corresponding time-lag. From the set of local maxima, a local maximum for positive time-lags is selected as a so-called positive time-lag inter-channel correlation candidate and a local maximum for negative time-lags is selected as a so-called negative time-lag inter-channel correlation candidate (S2). When the absolute value of a difference in amplitude between the inter-channel correlation candidates is smaller than a first threshold, it is evaluated whether there is an energy-dominant channel (S3). When there is an energy-dominant-channel, the sign of the inter-channel time difference is identified and a current value of the inter-channel time difference is extracted based on either the time-lag corresponding to the positive time-lag inter-channel con-elation candidate or the time-lag corresponding to the negative time-lag inter-channel correlation candidate (S4). |
申请公布号 |
EP2671221(B1) |
申请公布日期 |
2017.02.01 |
申请号 |
EP20110857726 |
申请日期 |
2011.04.07 |
申请人 |
Telefonaktiebolaget LM Ericsson (publ) |
发明人 |
BRIAND, Manuel;JANSSON, Tomas |
分类号 |
G10L19/00;G10L19/008;H04S3/00;H04S5/00 |
主分类号 |
G10L19/00 |
代理机构 |
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代理人 |
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地址 |
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