AC	Alternating current
AC	Approximation coefficients
ALM	Augmented Lagrange Multiplier
BP	blood pressure
bpm	beats per minute
bps	bits per second
BSS	Blind Source Separation
BVP	Blood-volume-pulse
DC	Direct current
DC	Detail coefficients
DL	Deep learning
DMHRE	Dual-Modality Heart-Rate Estimation
DSP	Digital signal processing
FFT	Fast Fourier Transform
FOV	Field of View
fps	frames per second
GPU	Graphic Processing Unit
GT	Ground truth
HGT	high ground truth
HR	heart rate
ICA	Independent Component Analysis
IFFT	Inverse Fast Fourier Transform
JADE	Joint Approximation Diagonalization of Eigen-matrices
MAE	Mean absolute error
MASF	Modified Amplitude Selective Filtering
MC	Matrix Completion
MIL	Multiple-Instance Learning
NIR	Near Infrared
PCP	Principal component pursuit
PRV	pulse rate variability
PSD	Power Spectrum Density
RMSE	Root mean square error
ROI	Region of Interest
RPCA	Robust Principal Component Analysis
rPPG	remote photoplethysmogram
SAMC	Self-Adaptive Matrix Completion
SOTA	State-of-the-art
SWT	Stationary wavelets transform
w, w/o	with, without
WD	Wavelet decomposition
WT	Wavelets transform