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Quantization Noise
https://classes.engineering.wustl.edu/ese488/Lectures/Lecture5a_QNoise.pdf
Quantization Noise Quantization is the mapping of a range of analog voltage to a single value. Staircase curve of a linear N Bit ADC Converter • Assume that the input in “busy”, moderate signal level. • Green curve is a scaled version of Vin without any quantization. • …
Digital Audio Chapter Five: Quantitization
https://cmtext.indiana.edu/digital_audio/chapter5_quantize.php
6. Quantizing, Approximation Errors and Sample Size. Samples, the periodic snapshots of the instantaneous amplitude of an input signal taken by the ADC, are assigned numeric values that the computer or digital circuit can use in a process called quantization.The number of available values which can be assigned is determined by the number of bits (0's and 1's) used for each …
Signals - Quantization and Sampling
https://makeabilitylab.github.io/physcomp/signals/QuantizationAndSampling/index.html
Example: how does quantization affect audio signals?¶ For the examples below, we'll work with pre-digitalized audio waveforms sampled at 44.1kHz and quantized at 16-bits. So, while not a true continuous sample (of course not, it's already a digital signal!), we'll loosely treat it as such.
Lecture 22: Sampling and quantization
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/lecture-videos/MIT6_003F11_lec22.pdf
Example: audio CD. 13. Quantizing Images ... Since the noise is different for each pixel in the band, the noise causes some of the pixels to quantize to a higher value and some to a lower. ... Quantization Schemes. Example: slowly changing backgrounds. Quantization: y = Q (x)
An Audiophile’s Guide to Quantization Error, Dithering ...
https://hometheaterhifi.com/technical/technical-reviews/audiophiles-guide-quantization-error-dithering-noise-shaping/
Noise shaping is a second method to improve the digital audio that consumers listen to. What it does is lower the noise floor in one place (the audio spectrum; 20 Hz – 20 kHz), and move the noise to another place (out of the audio spectrum), and is accomplished using feedback, as opposed to adding white noise to produce dithering.
7. Quantization Noise in DSP
http://www2.ensc.sfu.ca/people/faculty/ho/ENSC429/Chapter%207%20-%20Quantization%20Noise%20in%20DSP.pdf
7-3 The number X m must be large enough that the risk of overflow is small, and small enough that the quantization noise is kept to an acceptable level. When B→∞, xˆ becomes the real number x. • The quantization of x to xˆ can be done through 1. rounding, or 2. truncation.
ECE 429 - University of Arizona
https://uweb.engr.arizona.edu/~429rns/audiofiles/audiofiles.html
Parts sound like wideband (~white) noise in the background of the signal. Between words, the noise has a structured (buzzing) quality as the quantizer cycles between levels adjacent to 0. Speech quantized to 4 bits/sample Listen to just the quantization noise. Clearly, using a white noise model for quantization noise is a fairly crude ...
MANIPULATION - Analog Devices
https://www.analog.com/media/en/training-seminars/tutorials/MT-229.pdf
The rms signal-to-noise ratio, for an ideal N-bit converter (Equation 10, for example) with respect to the rms value of quantization noise (for example, Equation 7), hence (Equation 10)/(Equation 7), can now be computed in dB as 𝑆𝑆𝑆= 20 𝑙𝑙𝑙 10 𝑆𝑅𝑆 𝑣𝑣𝑙𝑣𝑣 𝑙𝑜 𝐹𝑆 𝑖𝑖𝑖𝑣𝑡
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