Content deleted Content added
Citation bot (talk | contribs) Add: hdl, s2cid, url, authors 1-1. Removed parameters. Some additions/deletions were parameter name changes. | Use this bot. Report bugs. | Suggested by Abductive | Category:Use American English from April 2019 | #UCB_Category 813/940 |
Tag: Reverted |
||
Line 80:
===Quantization noise model===
[[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.]]
Note ###. Author, please, review the picture, because the noise levels must be different: SQNR[6-bit] ≈ 6 • 6 = 36 dB, accordingly SQNR[8-bit] ≈ 48 dB.
Quantization noise is a [[Model (abstract)|model]] of quantization error introduced by quantization in the ADC. It is a rounding error between the analog input voltage to the ADC and the output digitized value. The noise is non-linear and signal-dependent. It can be modelled in several different ways.
| |||