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SAMPLE RATE CONVERTER, AN ANALOG TO DIGITAL CONVERTER INCLUDING A SAMPLE RATE CONVERTER AND A METHOD OF CONVERTING A DATA STREAM FROM ONE DATA RATE TO ANOTHER DATA RATE
SAMPLE RATE CONVERTER, AN ANALOG TO DIGITAL CONVERTER INCLUDING A SAMPLE RATE CONVERTER AND A METHOD OF CONVERTING A DATA STREAM FROM ONE DATA RATE TO ANOTHER DATA RATE
It is known to perform sample rate conversion. A sample rate converter is arranged to receive digital data at an input sample rate Fs and to output data at an output sample rate Fo, where Fo=Fs/N, and N is decimation factor greater than 1. A problem can arise with sample rate converters when a user wishes to change the decimation rate. Generally a sample rate converter needs to discard the samples in its filter when the decimation rate is changed, and the filter output is unusable until the filter has refilled with values taken at the new decimation rate. The sample rate converter provided here does not suffer from this problem. The sample rate converter includes at least Q channels. Each channel comprises a Qth order filter arranged to select input signals at predetermined intervals from a run of P input signals, and to form a weighted sum of the selected input signals to generate an output value, and where the runs of P input signals of one channel are offset from the runs of P signals of the other channels.
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机译:已知执行采样率转换。采样率转换器设置为以输入采样率F s Sub>接收数字数据,并以输出采样率F o Sub>输出数据,其中F o < / Sub> = F s Sub> / N,并且N是大于1的抽取因子。当用户希望更改抽取率时,采样率转换器可能会出现问题。通常,当抽取率发生变化时,采样率转换器需要丢弃其滤波器中的样本,并且直到滤波器重新填充以新抽取率获取的值后,滤波器的输出才可用。此处提供的采样率转换器不会遇到此问题。采样率转换器至少包括Q个通道。每个通道包括一个Q阶滤波器,该Q阶滤波器被安排为以预定间隔从一组P个输入信号中选择输入信号,并形成所选输入信号的加权和以产生输出值,其中P个输入信号中的一个为P个。通道相对于其他通道的P信号行程偏移。
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