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PCM to PWM conversion 101 - diyAudio
https://www.diyaudio.com/community/threads/pcm-to-pwm-conversion-101.205496/
US 7.626,519 B2 is such a patent assigned to TI; "Digital audio circuitry including modulation circuitry for generating a pulse-width modulated (PWM) signal from processed pulse-code modulated (PCM) audio signals.
A novel and efficient PCM to PWM converter for digital ...
https://ieeexplore.ieee.org/document/812249
A PCM to PWM converter is presented, based on a novel distortion compensating method which requires no oversampling to be applied in the digital PWM time domain and achieves high-fidelity audio performance at clock rates less than 90 Mbit/sec.
How do you convert PCM to PWM? - Arduino Stack Exchange
https://arduino.stackexchange.com/questions/53274/how-do-you-convert-pcm-to-pwm
Since PCM is a linear audio representation, the sample data it expects is a simple linear representation of the audio (unlike µLaw or A-law) and with no compression (such as MP3 or FLAC). And that is the exact same data that PWM expects since it too is a simple linear output.
PIC sound player (PCM to PWM converter) | Enide!
http://www.enide.net/webcms/index.php?page=pcm2pwm
Sound header file to compile together with the player code (H header file from pcm2h) Firmware HEX file PC Software PCM2H source PCM2H executable for windows (MinGW) [updated 2014/03/11] compile this with something like: gcc -W -Wall -o pcm2h pcm2h.c either in windows or linux Other audio samples you may use Alarm arming chirp wave pcm h
PIC sound player (PCM to PWM converter) using PIC18F1320
https://pic-microcontroller.com/pic-sound-player-pcm-to-pwm-converter-using-pic18f1320/
This project makes a PIC microcontroller play audio PCM sounds using PWM modulation! Pulse-code modulation ( PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code [ 1 ].
Converting PCM WAV audio to a sequence of PWM data to play ...
https://forum.arduino.cc/t/converting-pcm-wav-audio-to-a-sequence-of-pwm-data-to-play-on-a-piezo-speaker/342053
There are a couple of formats similar to PWM, and class-D amplifiers convert analog to high frequency PWM. (Class-D amplifiers don’t have any software or memory.) And of course, you have lossless and lossy audio compression. FLAC (lossless) compresses PCM data and MP3 (lossy) works in the frequency domain which is a whole 'nother story.
System Design Considerations for True Digital Audio …
https://www.ti.com/lit/an/slaa117a/slaa117a.pdf
A true digital audio amplifier (TDAA) chip set consists of a TAS50xx PCM-PWM modulator and a number of TAS51xx PWM amplifiers as shown in Figure 1. At the center of this patented technology is the conversion of pulse-code modulated …
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