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AN270 Audio A/D Conversion with an Asynchronous Decimation ...
https://manualzz.com/doc/8832534/an270-audio-a-d-conversion-with-an-asynchronous-decimatio...
Modern A/D converters utilize digital decimation filters which convert the highly oversampled data to the standard audio sample rates of 44.1, 48, 96 or 192 kHz. These decimation filters perform this function in a synchronous manner where the ratio of the input to output sample rates is fixed, generally either 512, 256 or 128.
Multistage Sample-Rate Conversion of Audio Signals ...
https://www.mathworks.com/help/audio/ug/multistage-sample-rate-conversion-of-audio-signals.html
This reveals that the conversion will be performed in two steps. The first step involves a decimation by two filter which converts the signal from 96 kHz to 48 kHz. The second step involves an FIR rate converter that interpolates by 147 and decimates by 160. This results in the 44.1 kHz required.
Asynchronous Sample Rate Conversion - diyAudio
https://www.diyaudio.com/community/threads/asynchronous-sample-rate-conversion.28814/
That "grabbing every 147th sample" is precisely DECIMATION. Just digital resampling, or downsampling. We didn't need a special filter for decimation in this case, cuz the interpolation filter did it's job for us Make sense? But of course, in this thread we're dealing with ASYNCHRONOUS sample rate conversion.
CS8421-CZZ Datasheet PDF - Cirrus Logic
https://www.datasheetq.com/CS8421-CZZ-doc-Cirrus-Logic
The CS8421 is also suitable for use as an asynchronous decimation or interpolation filter. See Cirrus Logic Application Note AN270, “Audio A/D Conversion with an Asynchronous Decimation Filter”, available at www.cirrus.com for more details. Features ♦ 175 dB Dynamic Range ♦ –140 dB THD+N ♦ No Programming Required ♦ No External Master Clock Required
cs8421-1
https://docs.rs-online.com/307c/0900766b814a3798.pdf
The CS8421 is a 32-bit, high-performance, monolithic CMOS stereo asynchronous sample-rate converter. Digital audio inputs and outputs can be 32, 24, 20, or 16 bi ts. Input and output data can be completely asynchronous, synchronous to an external data clock, or the part can operate without any external clock by using an integrated oscillator.
Design and Implementation of Sampling Rate …
https://www.diva-portal.org/smash/get/diva2:17936/FULLTEXT01.pdf
use a D/A converter in combination with a “brick wall” filter. The “brick wall” filter removes all signal images . Then output A/D converter converts signal back to a digital format. The A/D converter runs at the output sampling rate. Figure 1 shows the block-diagram of that design. [1] Figure 1 Analog method of sample-rate conversion
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