Digital Modulation

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Pulse-code 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. PCM is used in digital telephone systems and is also the standard form for digital audio in computers and various compact disc formats.

Delta-sigma modulation - The Delta-Sigma (ΔΣ) modulation is a kind of analog-to-digital signal conversion derived from delta modulation. An analog to digital converter (ADC) circuit which implements this technique can be easily realized using low-cost CMOS processes, such as the processes used to produce digital integrated circuits; for this reason, even though it was first presented in the early 1960s, it is only in recent years that it has obtained a great diffusion due to the improvements of silicon ...

Continuous phase modulation - Continuous phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase-modulation techniques where the carrier phase

Pulse-density modulation - 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 or PWM.


Suggested Web Sites

Theatre Organ Enhancements - Digital theatre organ voice modules (sampled from Wurlitzer pipe organs) for electronic or digital organ.

Research Center Module - A supplier of high-end DSP architectures, silicon IP, mixed-signal ASICs, embedded computers and application software for DSP and artificial neural networks.

MIDAS Digital Audio System - MIDAS is a multichannel digital sound system. It supports DOS, Win32, and Linux platforms and plays Protracker (.mod), Scream Tracker 3 (.s3m), FastTracker 2 (.xm) and Impulse Tracker (.it) modules, as well as samples and audio streams in raw or WAVE . MIDAS is free for non-commercial usage.

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