Open AccessColours of velvet noise
Author(s) -
MeyerKahlen Nils,
Schlecht Sebastian J.,
Välimäki Vesa
Publication year - 2022
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12501
Subject(s) - velvet , noise (video) , white noise , colors of noise , salt and pepper noise , noise power , mathematics , noise measurement , polarity (international relations) , acoustics , power (physics) , computer science , physics , noise reduction , artificial intelligence , statistics , materials science , median filter , chemistry , image (mathematics) , quantum mechanics , composite material , image processing , biochemistry , cell
Velvet noise is a sparse ternary pseudo‐random signal containing only a small portion of non‐zero values. In this work, the derivation of the spectral properties of velvet noise is presented. In particular, it is shown that the original velvet noise is white, i.e. has a constant power spectrum. For velvet noise variants with altered probability of polarity, the spectral characteristics are analytically derived. Crushed additive velvet noise is shown to have potential in the design of coloured sparse noise sequences, which are useful in acoustic signal processing.