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公开(公告)号：US11876525B2
公开(公告)日：2024-01-16
申请号：US17741152
申请日：2022-05-10
IPC分类号： H03M1/06
CPC分类号： H03M1/0602
摘要： An apparatus comprises circuitry configured to generate a predicted error signal by applying to a digital signal a distortion model characterized by parameters configured to model circuit component mismatches in a digital-to-analog converter (DAC), circuitry configured to generate a pre-compensated digital signal using the digital signal and the predicted error signal, and circuitry configured to provide the pre-compensated digital signal to the DAC for conversion into an analog signal.
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公开(公告)号：US11239929B1
公开(公告)日：2022-02-01
申请号：US17203332
申请日：2021-03-16
IPC分类号： H04B3/46 , H04B17/318
摘要： A receiver is configured to detect, at a communication interface, a received signal that suffers from degradations incurred over a communication channel. The receiver applies an adaptive filter to a series of received blocks of a digital representation of the received signal, thereby generating respective filtered blocks, where each received block represents 2N frequency bins, and where N is a positive integer. The receiver calculates coefficients for use by the adaptive filter on a jth received block as a function of (i) error estimates associated with an (j−D−1)th filtered block, where D is a positive integer representing a number of blocks, and where j is a positive integer greater than (D−1); and (ii) an inverse of an approximate covariance matrix associated with the (j−D−1)th received block, where the approximate covariance matrix is a diagonal matrix of size L×L, and where L is a positive integer lower than 2N.
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公开(公告)号：US11233568B1
公开(公告)日：2022-01-25
申请号：US17090135
申请日：2020-11-05
IPC分类号： H04B10/06 , H04B10/2507 , H04B10/2569 , H04B10/67 , H04B10/532 , H04B10/69
摘要： A receiver is configured to detect, at a communication interface, a received signal that suffers from degradations incurred over a communication channel. The receiver applies an adaptive filter to a series of received blocks of a digital representation of the received signal, thereby generating respective filtered blocks. The receiver calculates coefficients for use by the adaptive filter on an jth received block as a function of (i) error estimates associated with an (j−D−1)th filtered block, where D is a positive integer representing a number of blocks, and where j is a positive integer greater than (D−1); and (ii) delay compensation terms dependent on an estimate of a difference between coefficients used by the adaptive filter on an (j−D−1)th received block and coefficients used by the adaptive filter on an (j−1)th received block
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公开(公告)号：US20120053948A1
公开(公告)日：2012-03-01
申请号：US13216295
申请日：2011-08-24
申请人： Frederic Mustiere , Hossein Najaf-Zadeh , Ramin Pishehvar , Hassan Lahdili , Louis Thibault , Martin Bouchard
发明人： Frederic Mustiere , Hossein Najaf-Zadeh , Ramin Pishehvar , Hassan Lahdili , Louis Thibault , Martin Bouchard
CPC分类号： H03M7/30
摘要： The invention relates to compressing of sparse data sets contains sequences of data values and position information therefor. The position information may be in the form of position indices defining active positions of the data values in a sparse vector of length N. The position information is encoded into the data values by adjusting one or more of the data values within a pre-defined tolerance range, so that a pre-defined mapping function of the data values and their positions is close to a target value. In one embodiment, the mapping function is defined using a sub-set of N filler values which elements are used to fill empty positions in the input sparse data vector. At the decoder, the correct data positions are identified by searching though possible sub-sets of filler values.
摘要翻译： 本发明涉及压缩稀疏数据集包含数据值序列和位置信息。 位置信息可以是以长度N的稀疏向量定义数据值的活动位置的位置索引的形式。通过将一个或多个数据值调整在预定公差内，将位置信息编码为数据值 范围，使得数据值及其位置的预定义映射函数接近目标值。 在一个实施例中，使用N个填充值的子集定义映射函数，该子集用于填充输入稀疏数据向量中的空白位置。 在解码器处，通过搜索填充值可能的子集来识别正确的数据位置。
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公开(公告)号：US08123928B2
公开(公告)日：2012-02-28
申请号：US12645197
申请日：2009-12-22
摘要： A process for shutting down an operating electrolytic cell for the production of aluminium is described. The process includes: lowering anodes until a lower portion of the anodes is immersed in an aluminium layer; allowing the aluminium layer and an electrolyte bath to cool down with the lower portion of the anodes immersed in the aluminium layer; determining if the electrolyte bath is solidified, and if the electrolyte bath is solidified, raising the anodes before solidification of the aluminium layer to create a space between the solidified electrolyte bath and the anodes and the aluminium layer.
摘要翻译： 描述了一种关闭用于生产铝的工作电解池的方法。 该方法包括：降低阳极，直到阳极的下部浸入铝层中; 允许铝层和电解液槽与浸在铝层中的阳极的下部冷却下来; 确定电解质浴是否固化，并且如果电解质浴固化，则在铝层凝固之前升高阳极以在固化的电解液浴和阳极和铝层之间形成空间。
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公开(公告)号：US20110305345A1
公开(公告)日：2011-12-15
申请号：US13147603
申请日：2010-02-03
CPC分类号： G10L21/0208 , G10L2021/02166 , H04R1/1083 , H04R25/43 , H04R2225/43 , H04R2410/01 , H04R2460/01
摘要： A method for a multi microphone noise reduction in a complex noisy environment is proposed. A left and a right noise power spectral density for a left and a right noise input frame is estimated for computing a diffuse noise gain. A target speech power spectral density is extracted from the noise input frame. A directional noise gain is calculated from the target speech power spectral density and the noise power spectral density. The noisy input frame is filtered by Kalman filtering method. A Kalman based gain is generated from the Kalman filtered noisy frame and the noise power spectral density. A spectral enhancement gain is computed by combining the diffuse noise gain, the directional noise gain, and the Kalman based gain. The method reduces different combinations of diverse background noise and increases speech intelligibility, while guaranteeing to preserve the interaural cues of the target speech and directional background noises.
摘要翻译： 提出了一种复杂嘈杂环境中多麦克风降噪的方法。 估计左和右噪声输入帧的左和右噪声功率谱密度用于计算漫反射噪声增益。 从噪声输入帧提取目标语音功率谱密度。 根据目标语音功率谱密度和噪声功率谱密度计算定向噪声增益。 噪声输入帧通过卡尔曼滤波法滤波。 从卡尔曼滤波噪声帧和噪声功率谱密度产生基于卡尔曼的增益。 通过组合漫射噪声增益，方向噪声增益和基于卡尔曼的增益来计算频谱增强增益。 该方法减少了不同背景噪声的不同组合，增加了语音清晰度，同时保证了目标语音和定向背景噪声的昼夜线索。
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公开(公告)号：US20110147226A1
公开(公告)日：2011-06-23
申请号：US12645197
申请日：2009-12-22
摘要： A process for shutting down an operating electrolytic cell for the production of aluminium is described. The process includes: lowering anodes until a lower portion of the anodes is immersed in an aluminium layer; allowing the aluminium layer and an electrolyte bath to cool down with the lower portion of the anodes immersed in the aluminium layer; determining if the electrolyte bath is solidified, and if the electrolyte bath is solidified, raising the anodes before solidification of the aluminium layer to create a space between the solidified electrolyte bath and the anodes and the aluminium layer.
摘要翻译： 描述了一种关闭用于生产铝的工作电解池的方法。 该方法包括：降低阳极，直到阳极的下部浸入铝层中; 允许铝层和电解液槽与浸在铝层中的阳极的下部冷却; 确定电解质浴是否固化，并且如果电解质浴固化，则在铝层凝固之前升高阳极以在固化的电解液浴和阳极和铝层之间形成空间。
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