专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US09668066B1 Blind source separation systems 有权
公开(公告)号：US09668066B1
公开(公告)日：2017-05-30
申请号：US14746262
申请日：2015-06-22
申请人： David Anthony Betts , Mohammad A. Dmour
发明人： David Anthony Betts , Mohammad A. Dmour
IPC分类号： G10L21/02 , H04R25/00 , G10L21/0272 , G10L21/0216
CPC分类号： H04R25/40 , G10L21/02 , G10L21/0272 , G10L2021/02166 , H04R1/406 , H04R3/005 , H04R25/405 , H04R25/554 , H04R2225/43 , H04R2430/20
摘要： We describe a method of blind source separation for use, for example, in a listening or hearing aid. The method processes input data from multiple microphones each receiving a mixed signal from multiple audio sources, performing independent component analysis (ICA) on the data in the time-frequency domain based on an estimation of a spectrogram of each acoustic source. The spectrograms of the sources are determined from non-negative matrix factorization (NMF) models of each source, the NMF model representing time-frequency variations in the output of an acoustic source in the time-frequency domain. The NMF and ICA models are jointly optimized, thus automatically resolving an inter-frequency permutation ambiguity.

2. 发明授权

US10529354B1 Audio amplitude unwrapping 有权
公开(公告)号：US10529354B1
公开(公告)日：2020-01-07
申请号：US16115676
申请日：2018-08-29
申请人： Cedar Audio Ltd
发明人： David Betts
IPC分类号： G10L21/0208 , G10L21/038
摘要： A computer-implemented method for restoring a wrapped audio signal comprising a plurality of digitised signal samples at respective sample times, the method comprising: estimating a sequence of corrections comprising a sequence of numerical values the estimating comprising, for each signal sample: applying, at the sample time, a numerical filter to each of a set of potential corrections to determine a filtered value associated with each set of potential integer corrections wherein the filter enhances the filtered value at sample times when a change in a degree of wrapping occurs relative to sample times when a change in degree of wrapping does not occur; determining a cumulative objective over a plurality of signal samples by accumulating objective values and determining a sequence by selecting for each sample time a correction from the set of potential corrections wherein the correction for each sample time are selected to optimise the cumulative objective.

3. 发明授权

US09576583B1 Restoring audio signals with mask and latent variables 有权
标题翻译：使用掩码和潜在变量恢复音频信号
公开(公告)号：US09576583B1
公开(公告)日：2017-02-21
申请号：US14557014
申请日：2014-12-01
申请人： David Anthony Betts
发明人： David Anthony Betts
IPC分类号： G10L21/02 , G10L21/0216 , G10L21/0264 , G10L19/00
CPC分类号： G10L21/0232 , G10L21/0264
摘要： We describe techniques for restoring an audio signal. In embodiments these employ masked positive semi-definite tensor factorization to process the signal in the time-frequency domain. Broadly speaking the methods estimate latent variables which factorize a tensor representation of the (unknown) variance/covariance of an input audio signal, using a mask so that the audio signal is separated into desired and undesired audio source components. In embodiments a masked positive semi-definite tensor factorization of ψftk=MftkUfkVtk is performed, where M defines the mask and U, V the latent variables. A restored audio signal is then constructed by modifying the input signal to better match the variance/covariance of the desired components.
摘要翻译：我们描述恢复音频信号的技术。在实施例中，这些采用掩蔽的正半定标张分解法处理时频域中的信号。概括地说，这些方法估计潜在变量，其使用掩码将因子分解成期望和不期望的音频源分量的音频信号的（未知）方差/协方差的张量表示因子化。在实施例中，执行ψftk= MftkUfkVtk的掩蔽的正半定量张量因子分解，其中M定义掩模，U，V为潜变量。然后通过修改输入信号以更好地匹配所需组件的方差/协方差来构建恢复的音频信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式