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PDM — Pulse density modulation interface
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pdm.html#:~:text=PDM%20%E2%80%94%20Pulse%20density%20modulation%20interface.%20The%20pulse,from%20external%20audio%20frontends%2C%20for%20example%2C%20digital%20microphones.
Understanding PDM Digital Audio
https://users.ece.utexas.edu/~bevans/courses/rtdsp/lectures/10_Data_Conversion/AP_Understanding_PDM_Digital_Audio.pdf
PCM (Pulse Code Modulation): a system for representing a sampled signal as a series of multi-bit words. This is the technology used in audio CDs. PDM (Pulse Density Modulation): a system for representing a sampled signal as a stream of single bits. Sampling rate is the rate at which a signal is sampled to produce a discrete-time representation.
More about PDM - Audio Precision
https://www.ap.com/technical-library/more-about-pdm/
PDM is Pulse Density Modulation, a system for representing a sampled signal as a stream of single bits using delta sigma conversion (sometimes called sigma delta conversion). PDM is the technology used in many oversampling ADCs and DACs, and is the basis of the Sony/Philips commercial digital format and disc trade-named DSD and SACD, respectively.
PDM — Pulse density modulation interface
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pdm.html
The pulse density modulation (PDM) module enables input of pulse density modulated signals from external audio frontends, for example, digital microphones. The PDM module generates the PDM clock and supports single-channel or dual-channel (Left and Right) data input. Data is transferred directly to RAM buffers using EasyDMA.
Pulse Density Modulation Advantages,Pulse Density ...
https://www.rfwireless-world.com/Terminology/Advantages-and-Disadvantages-of-Pulse-Density-Modulation.html
Following are the benefits or advantages of Pulse Density Modulation: It uses digital form of signal to represent analog audio. Hence it offers low noise output. It is immune from interfering signals. It is used for low cost implementation in which analog audio is converted into digital form in mono or in stereo over a clock/data pair.
Pulse Density Modulation | Hackaday
https://hackaday.com/2015/09/08/pulse-density-modulation/
For pulse density modulation if X is too big – say, if you have a minimum time increment of 1 microsecond, and your period is 256 microseconds, and X is …
AN3998 Application note - STMicroelectronics
https://www.st.com/content/ccc/resource/technical/document/application_note/ca/18/be/bb/f8/53/47/a5/DM00040808.pdf/files/DM00040808.pdf/jcr:content/translations/en.DM00040808.pdf
Pulse density modulation, or PDM, is a form of modulation used to represent an analog signal in the digital domain. In a PDM signal, specific amplitude values are not encoded into pulses as they would be in PCM. Instead it is the relative density of the pulses that corresponds to the analog signal's amplitude.
Pulse-density modulation - WikiMili, The Best Wikipedia …
https://wikimili.com/en/Pulse-density_modulation
Pulse-density modulation. Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses ...
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