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1. 发明申请

WO2007095624A2 DIGITAL DOMAIN SAMPLING RATE CONVERTER 审中-公开
标题翻译：数字域采样率转换器
公开(公告)号：WO2007095624A2
公开(公告)日：2007-08-23
申请号：PCT/US2007/062250
申请日：2007-02-15
申请人： QUALCOMM INCORPORATED , WANG, Song , CHOY, Eddie L.T. , KULKAMI, Prajakt, V. , GUPTA, Samir, Kumar
发明人： WANG, Song , CHOY, Eddie L.T. , KULKAMI, Prajakt, V. , GUPTA, Samir, Kumar
IPC分类号： H03H17/06
CPC分类号： H03H17/0685 , H03H17/0294
摘要： Techniques are described for sampling rate conversion in the digital domain by up-sampling and down-sampling a digital signal according to a selected intermediate sampling frequency. A prototype anti-aliasing filter that has a bandwidth with multiple factors is stored in memory. The techniques include selecting an intermediate sampling frequency to be an integer multiple of a desired output sampling frequency of a digital signal based on the factors of the prototype filter, and selecting a down-sampling factor to be the same integer associated with the selected intermediate sampling frequency. A filter generator generates an anti-aliasing filter for the selected down-sampling factor based on the prototype filter. A sampling rate converter up-samples the digital signal at an input sampling frequency to the selected intermediate sampling frequency, filters the digital signal with the derived anti-aliasing filter, and down-samples the digital signal by the selected down-sampling factor to the desired output sampling frequency.
摘要翻译：通过根据选择的中间采样频率对数字信号进行上采样和下采样来描述数字域中的采样率转换的技术。具有多种因素带宽的原型抗混叠滤波器存储在内存中。该技术包括基于原型滤波器的因子来选择中间采样频率为数字信号的期望输出采样频率的整数倍，并且选择下采样因子为与所选择的中间采样相关联的相同整数频率。滤波器生成器基于原型滤波器为选定的下采样因子生成抗混叠滤波器。采样率转换器将输入采样频率的数字信号上采样到选定的中间采样频率，用导出的抗混叠滤波器对数字信号进行滤波，并将数字信号通过选择的下采样因子下采样到所需的输出采样频率。

2. 发明申请

WO2007095624A3 DIGITAL DOMAIN SAMPLING RATE CONVERTER 审中-公开
标题翻译：数字采样速率转换器
公开(公告)号：WO2007095624A3
公开(公告)日：2007-10-11
申请号：PCT/US2007062250
申请日：2007-02-15
申请人： QUALCOMM INC , WANG SONG , CHOY EDDIE L T , KULKAMI PRAJAKT V , GUPTA SAMIR KUMAR
发明人： WANG SONG , CHOY EDDIE L T , KULKAMI PRAJAKT V , GUPTA SAMIR KUMAR
IPC分类号： H03H17/06
CPC分类号： H03H17/0685 , H03H17/0294
摘要： Techniques are described for sampling rate conversion in the digital domain by up-sampling and down-sampling a digital signal according to a selected intermediate sampling frequency. A prototype anti-aliasing filter that has a bandwidth with multiple factors is stored in memory. The techniques include selecting an intermediate sampling frequency to be an integer multiple of a desired output sampling frequency of a digital signal based on the factors of the prototype filter, and selecting a down-sampling factor to be the same integer associated with the selected intermediate sampling frequency. A filter generator generates an anti-aliasing filter for the selected down-sampling factor based on the prototype filter. A sampling rate converter up-samples the digital signal at an input sampling frequency to the selected intermediate sampling frequency, filters the digital signal with the derived anti-aliasing filter, and down-samples the digital signal by the selected down-sampling factor to the desired output sampling frequency.
摘要翻译：描述了通过根据所选择的中间采样频率对数字信号进行上采样和下采样来对数字域中的采样率转换进行描述的技术。具有多个因素的带宽的原型抗混叠滤波器存储在存储器中。这些技术包括基于原型滤波器的因素来选择中间采样频率为数字信号的期望输出采样频率的整数倍，并且将下采样因子选择为与所选择的中间采样相关联的整数频率。滤波器发生器基于原型滤波器生成用于所选择的下采样因子的抗混叠滤波器。采样率转换器将数字信号以输入采样频率向采样频率进行上采样，以采样导出的抗混叠滤波器对数字信号进行滤波，并通过选择的下采样因子将数字信号下采样到所需输出采样频率。

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