BILSTM	bidirectional LSTM
CC	correlation coefficient
FC	fully connected
FBM	functional body mesh
FFNN	feed forward neural network
GRU	gated recurrent unit
HML	Human Motion Laboratory
IK	inverse kinematics
KF	Kalman filter
LS	least squares
LSTM	long-short term memory
Mocap	MOtion CAPture
MSE	Mean Square Error
NARX-NN	nonlinear autoregressive exogenous neural network
NaN	not a number
NN	neural network
OMC	optical motion capture
PCA	principal component analysis
PJAIT	Polish-Japanese Academy of Information Technology
RMSE	root mean squared error
RNN	recurrent neural network
STDDEV	standard deviation
SVD	singular value decomposition