YOLO	You Only Look Once
ROI	Region of Interest
IIR	Infinite Impulse Response
IBI	Inter-Breath Interval
$RR$	Respiratory Rate
3D-CNNs	Three-Dimensional Convolutional Neural Networks
SSD	Single Shot MultiBox Detector
YUV	Luminance (Y) and chrominance components (U: blue-difference, V: red-difference)
C2f	Cross Stage Partial with 2 convolutions and fusion
BPM	Breaths Per Minute
GUI	Graphical User Interface
GPU	Graphics Processing Unit
CPU	Central Processing Unit
DFL	Distribution Focal Loss
PR	Precision–Recall
BiLSTM	Bidirectional Long Short-Term Memory
CZT	Chirp Z-Transform
RQI	Region Quality Index
FFT	Fast Fourier Transform
AMDF	Average Magnitude Difference Function
NICU	Neonatal Intensive Care Unit
FPS	Frames Per Second
RGB	Red, Green, Blue color space
MAD	Median Absolute Deviation
EMA	Exponential Moving Average
MAE	Mean Absolute Error
RMSE	Root Mean Square Error
SNR	signal-to-noise ratio
p05	5th percentile
p95	95th percentile
MSB	most significant byte
LSB	least significant byte
Std Dev	Standard deviation
COPD	Chronic Obstructive Pulmonary Disease