Design of Efficient Poly-phase Filter Using Tlbo for Up-sampling of Audio Signals

The paper describes an optimal design of poly-phase filter for up-sampling of audio signals. The design of filter is based on Teaching-Learning-Based Optimization (TLBO) algorithm. To obtain a digital filter that maintains the sequence of original signal points and at the same time increase the sampling rate with no change in shape of its spectrum, TLBO algorithm is applied and results are illustrated using the frequency versus time graph with analysis of the spectrum properties that seemed to be maintained properly in all three cases, which included linear, convex and concave shaped signals.