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VHDL Based PCM Modulator Model - IJDCN
http://ijdcn.co.in/download/2017/06/IJDCN001V4ISSUE6.pdf
Keyword : Digital Filter, VHDL (VHSIC Hardware Description Language), FPGA (Field Programmable Gate Arrays), Electronics Switch. Introduction The Operation Theory of PCM Modulation PCM modulation is a kind of source coding. The meaning of source coding is the conversion from analog signal to digital signal.
Overview :: 1 bit adpcm codec :: OpenCores
https://opencores.org/projects/audio
VHDL code consists: 1-bit ADPCM Decoder (x2), I2S Driver (x1), I2C Driver (x1), Flash Memory Driver (x1), Keyboard Driver (x1), LED Bar (x1), Volume and Config Engine (x1). Codec (Encoder/Decoder) is available in Win32 application that you can use it to encode PCM RAW wave files, then burn the *.DJ file into the flash, make sure the flash is already clear (you can use the …
PCM Audio - COMPLETE GUIDE AND REFERENCE
https://planethifi.com/pcm-audio/
PCM Audio. In basic terms, a PCM audio file is a digital interpretation of an analog sound wave whose goal is to replicate the properties of an analog audio signal as closely as possible to the original source (), called fidelity ().The conversion from analog to digital PCM audio is done through a process called sampling ().In the process of sampling, we will consider …
Audio Looper Project: ECE 378 Design
https://www.secs.oakland.edu/~llamocca/Courses/W16_ECE378/FinalProject/Group5_audiolooper_presentation.pdf
VHDL: Audio Input Module Convert from PDM (pulse density modulation) to PCM (pulse code modulation) PCM = series of stair steps PDM = logic high is up, logic low is down (relative description) Wanted to use algorithm to convert Send the PCM signal to memory Send out that PCM signal to audio out and then convert to PDM
Design and Implementation of ADPCM Based Audio …
http://ipcsit.com/vol37/045-ICINT2012-I3213.pdf
discusses the implementation of ADPCM algorithm for audio compression of .wav file. It yields a compressed file ¼ of the size of the original file. The sound quality of the audio file is maintained reasonably after compression. Keywords: ADPCM, audio compression, VHDL. 1. Introduction
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