On the computational complexity of the LBG and PNN algorithms

Jamshid Shanbehzadeh, Philip Ogunbona

Abstract: This correspondence compares the computational complexity of the pair-wise nearest neighbor (PNN) and Linde-Buzo-Gray (LBG) algorithms by deriving analytical expressions for their computational times. It is shown that for a practical codebook size and training vector sequence, the LBG algorithm is indeed more computationally efficient than the PNN algorithm.