Quantization (signal processing): Difference between revisions

Revision as of 11:12, 22 January 2022

Revision as of 05:12, 5 February 2022

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===Quantization noise model===

[[File:quanterr.png|thumb|300px|Quantization noise for a 2-bit ADC operating at infinite [[sample rate]]. The difference between the blue and red signals in the upper graph is the quantization error, which is "added" to the quantized signal and is the source of noise.]]

[[File:Frequency spectrum of a sinusoid and its quantization noise floor.gif|thumb|300px|Comparison of quantizing a sinusoid to 64 levels (6 bits) and 256 levels (8 bits). The additive noise created by 6-bit quantization is 12 dB greater than the noise created by 8-bit quantization. When the spectral distribution is flat, as in this example, the 12 dB difference manifests as a measurable difference in the noise floors.]]