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AN-000111 - TDK
https://invensense.tdk.com/wp-content/uploads/2016/05/AN-000111-PDM-Decimation-v1.0.pdf#:~:text=The%20decimation%20ratio%20is%20usually%20set%20between%2025,against%20the%20lower%20power%20consumption%20in%20this%20mode.
Decimation - dspGuru
https://dspguru.com/dsp/faqs/multirate/decimation/
2.1 Basics 2.1.1 What are “decimation” and “downsampling”? Loosely speaking, “decimation” is the process of reducing the sampling rate. In practice, this …
AN-000111 - TDK
https://invensense.tdk.com/wp-content/uploads/2016/05/AN-000111-PDM-Decimation-v1.0.pdf
The rest of the audio system can natively process this decimated signal. The Nyquist frequency, or half of the baseband sampling rate (f s), defines the audio bandwidth that the decimated signal represents. This baseband sampling rate, at a frequency 2× the audio bandwidth, is typically 8 to 48 kHz, although certain applications
Decimation Filter - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/engineering/decimation-filter
Given an oversampling rate DSP system with the following specifications, determine the effective ADC resolution: Second-order SDM = 1-bit ADC Sampling rate = 1 MHz Maximum audio input frequency = 4 kHz Solution n = 1 + 2.5 × log2(1, 000kHz 2 × 4kHz) − 2.14 ≈ 16 bits
Decimation — decrease sample rate by integer factor ...
https://www.mathworks.com/help/signal/ref/decimate.html
Decimation reduces the original sample rate of a sequence to a lower rate. It is the opposite of interpolation. decimate lowpass filters the input to guard against aliasing and downsamples the result. The function uses decimation algorithms 8.2 and 8.3 from [1]. decimate creates a lowpass filter. The default is a Chebyshev Type I filter ...
Audio Sample-Rate Conversion
https://lost-contact.mit.edu/afs/inf.ed.ac.uk/group/teaching/matlab-help/R2013b/dsp/examples/audio-sample-rate-conversion.html
Converting the Sampling Rate from 44.1 KHz to 96 KHz. The conversion from an audio signal sampled at 44.1 kHz (CD quality) to an audio signal sampled at 96 kHz (DVD quality) can be done in two steps. Before describing the two steps, an audio file …
Chapter 9 Multirate Digital Signal Processing
https://www.staff.ncl.ac.uk/oliver.hinton/eee305/Chapter9.pdf
Figure 9.7: Sampling-rate conversion by expansion, filtering, and decimation. An example of sampling-rate conversion would take place when data from a CD is transferred onto a DAT. Here the sampling-rate is increased from 44.1 kHz to 48 kHz. To enable this process the non-integer factor has to be approximated by a rational number: 1.08844 147 ...
Recommended Practices for Enhancing Digital Audio ...
https://www.cs.columbia.edu/~hgs/audio/dvi/IMA_ADPCM.pdf
Digital Audio Sampling Rates The problem of different audio sampling rates has been addressed in the proposal by selecting a minimum set of four sampling rates. One sampling rate is the 8.0 kHz rate typically used with the 8-bit companded converters. A second sampling rate selected is the 11.025 kHz rate found in PC’s and the Macintosh.
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