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公开(公告)号:EP1952380A4
公开(公告)日:2011-02-09
申请号:EP06844256
申请日:2006-11-02
申请人: HARRIS CORP
发明人: DESCHAMP JOSEPH
CPC分类号: G01R13/0272 , H03H17/028 , H03H17/0621 , H04N17/00
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公开(公告)号:EP1952380A2
公开(公告)日:2008-08-06
申请号:EP06844256.5
申请日:2006-11-02
申请人: Harris Corporation
发明人: DESCHAMP, Joseph
IPC分类号: G09G5/00
CPC分类号: G01R13/0272 , H03H17/028 , H03H17/0621 , H04N17/00
摘要: A video display for digitized video data interpolates values between time samples, such as luminance over a horizontal line or over an average of all the horizontal lines in a video signal, so as to produce a digitally plotted test display resembling the continuous line display of an oscilloscope. A digital impulse response filter has stored coefficients that contribute as factors to the values of interpolated data points to fill the line display between sample values. Instead of changing the coefficients to produce variations interpolating the output between sample values, the coefficients are held constant and a delay factor is varied to alter the extent to which the respective coefficients and sample values interact and contribute to the interpolated values.
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公开(公告)号:EP1558992A1
公开(公告)日:2005-08-03
申请号:EP02787584.8
申请日:2002-11-06
申请人: Nira Dynamics AB
CPC分类号: G06F17/17 , B60C23/06 , H03H17/028 , H03H2218/14
摘要: The invention is directed to a digital signal processing method and system for digitally processing a discretized in-put signal (12) provided in form of a plurality of discrete input signal values at corresponding discrete input time instants which are distributed non-equidistantly in time. The method comprises a conversion of the input signal (12) to a discretized output signal (16) representing the input signal (10) with discrete output signal values at discrete output time instants which are distributed equidistantly in time, wherein the conversion is carried out by a linear interpola-tion (14). The weight factors (w(i,n)) of the linear interpo-lation are derived from an impulse response function of a filter (18).
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公开(公告)号:EP1313219A1
公开(公告)日:2003-05-21
申请号:EP02079725.4
申请日:2002-11-13
IPC分类号: H03H17/06
CPC分类号: H03H17/0275 , H03H17/028 , H03H2218/08
摘要: La présente invention concerne un convertisseur de signal numérique d'entrée (1) en un signal numérique de sortie (3) à partir d'un ensemble de coefficients de filtrage. Le convertisseur comprend des moyens de filtrage réalisant une fonction de filtrage et fournissant l'ensemble de coefficients de filtrage à partir de déphasages (2) entre un échantillon du signal numérique de sortie et des échantillons du signal numérique d'entrée, la fonction de filtrage étant définie par un ensemble de polynômes. Les moyens de filtrage comprennent en outre une mémoire (52) pour stocker des coefficients des polynômes, et des moyens de calcul (53) de l'ensemble de coefficients de filtrage à partir des coefficients des polynômes et des déphasages. Un tel convertisseur permet un grand nombre de conversions de format, tout en disposant de ressources mémoire limitées.
摘要翻译: 将输入数字信号(1)转换为输出数字信号(3)是基于一组滤波器系数,并且转换器包括用于滤波的装置,其包括用于存储多项式系数的存储器(52)和装置 用于基于多项式系数和输出数字信号样本与输入数字信号样本之间的相移(2)来计算(53)滤波器系数集合。 转换器还包括用于根据用于通过一组多项式近似滤波函数(即样条)来选择(51)多项式作为相移(2)的函数的装置。 基于一组滤波器系数将输入数字信号转换为输出数字信号的方法包括利用由一组多项式定义的滤波函数的滤波步骤; 滤波步骤包括多项式系数的存储器存储的子步骤和基于多项式和相移的系数来计算滤波器系数集合的子步骤。 该方法还包括选择作为相移的函数的多项式的步骤。 视频监视器包括如权利要求所述的转换器。
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公开(公告)号:EP0695032A1
公开(公告)日:1996-01-31
申请号:EP94111557.8
申请日:1994-07-25
发明人: Heiss, Dr. Rainer , Schu, Markus
IPC分类号: H03H17/06
CPC分类号: H03H17/028 , H03H17/0642 , H03H17/0685
摘要: Digital-to-digital sample rater converter for converting digital input signals x(n) having a first sample rate F into digital output signals y(m) having a second sample rate F · L/M , wherein L/M is an arbitrary rational fraction. The digital lowpass filter needed for sample rate convertion has a piecewise continuous linear hull curve. This allows an efficient and low-cost hardware solution, since only one multiplier is needed for the digital-to-digital sample rate converter.
摘要翻译: 用于将具有第一采样率F的数字输入信号x(n)转换为具有第二采样率F的数字输出信号y(m)的数字 - 数字采样器转换器。 L / M,其中L / M是任意的合理分数。 采样率转换所需的数字低通滤波器具有分段连续线性船体曲线。 这允许高效且低成本的硬件解决方案,因为数字 - 数字采样率转换器只需要一个乘法器。
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公开(公告)号:EP3249649B1
公开(公告)日:2018-09-26
申请号:EP17172658.1
申请日:2017-05-24
发明人: Tachi, Ryosuke
IPC分类号: G10L21/0388 , H03H17/02 , H03H17/06
CPC分类号: G10L21/038 , G10L21/0388 , H03H17/028 , H03H17/0621
摘要: An upper limit of a frequency range of audio indicated by input audio data is detected. A representative point extraction unit (31) downsamples the input audio data to a sampling rate set to be less than or equal to twice the detected upper limit to obtain representative-point audio data. An interpolation processing unit (33) upsamples the representative-point audio data by using a fractal interpolation function (FIF) that uses a mapping function calculated by a mapping function calculation unit (32), while using the input audio data, if necessary, to generate high-frequency interpolated audio data.
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公开(公告)号:EP2684327B1
公开(公告)日:2016-01-20
申请号:EP11860283.8
申请日:2011-03-09
发明人: HUANG, Xiaojing , GUO, Yingjie Jay , ZHANG, Jian
CPC分类号: H04B1/0017 , H03H17/028 , H03H17/0642 , H04L25/03828 , H04L25/03834 , H04L25/03878 , H04L25/14 , H04L27/2628 , H04L27/2644 , H04L27/2649
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公开(公告)号:EP1772963A4
公开(公告)日:2008-04-16
申请号:EP05720524
申请日:2005-03-10
申请人: D & M HOLDINGS INC
发明人: FUKUSHIMA M
CPC分类号: H03H17/0621 , G10L21/038 , G11B20/10009 , G11B20/10527 , G11B2020/10546 , G11B2020/10564 , G11B2020/10583 , H03H17/028 , H03H17/0294 , H03M1/661
摘要: An audio signal output device for outputting on the basis of an digital audio signal. A decision unit decides the inversion frequency of the polarities of the digital audio signal. A select unit switches the output of the audio signal output device in accordance with the decision result by the decision unit between an output based on a first interpolated digital audio signal interpolated by a first interpolation of the digital audio signal and an output based on a second interpolated digital audio signal interpolated by a second interpolation of the digital audio signal.
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公开(公告)号:EP1772963A1
公开(公告)日:2007-04-11
申请号:EP05720524.7
申请日:2005-03-10
申请人: D&M Holdings, Inc.
CPC分类号: H03H17/0621 , G10L21/038 , G11B20/10009 , G11B20/10527 , G11B2020/10546 , G11B2020/10564 , G11B2020/10583 , H03H17/028 , H03H17/0294 , H03M1/661
摘要: The present invention relates to an audio signal output device for outputting based on a digital audio signal. A judging unit judges the frequency of reversals in polarity of the digital audio signal. A selecting unit switches an output of the audio signal output device between an output based on a first interpolated digital audio signal obtained by interpolating the digital audio signal by way of a first interpolation processing and another output based on a second interpolated digital audio signal obtained by interpolating the digital audio signal by way of a second interpolation processing in response to a judgment result made by the judging unit.
摘要翻译: 本发明涉及一种用于基于数字音频信号输出的音频信号输出装置。 判断单元判断数字音频信号的极性反转频率。 选择单元基于通过第一内插处理对数字音频信号进行内插而获得的第一内插数字音频信号和基于由第二内插数字音频信号获得的第二内插数字音频信号而得到的另一输出,在音频信号输出装置的输出之间切换输出 响应于由判断单元作出的判断结果,通过第二内插处理内插数字音频信号。
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公开(公告)号:EP0497060B1
公开(公告)日:2006-04-19
申请号:EP91312098.6
申请日:1991-12-31
IPC分类号: G11B20/10
CPC分类号: H03H17/028 , G11B20/10527 , H03H17/0621
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