Speed Optimised CORDIC Based Fast Algorithm for DCT

Discrete Cosine Transform is the most widely used transform recorded in the history especially for image and video compression. DCT can be efficiently carried out using a well-known iterative algorithm called CORDIC to perform vector rotations. An efficient CORDIC based fast algorithm for DCT is presented with some notable advantages like data flow similar to Cooley - Tukey FFT, identical post-scaling factor and rotation angles in arithmetic sequence. CORDIC types are reduced to one by choosing trigonometric formula. This algorithm overcomes the problem of non-synchronization among the CORDIC rotation angles. This is achieved by using Carry Save Adder (CSA) in the Processing Elements (PE) in the place of full adders and the two different PEs are used to exploit four PEs. The delay reduces drastically by using modified 4:2 Carry Save Adder architecture Citation: V.K.Vidhysankari, Dr.Mahalingam College of Engineering and Technology; B.Pradeep Kumar ,. "Speed Optimised CORDIC Based Fast Algorithm for DCT." Global Research and Development Journal For Engineering : 443 - 451.