A LOW POWER AND HIGH SPEED APPROXIMATE ADDER FOR IMAGE PROCESSING APPLICATIONS

Abstract

Low power is an essential requirement for suitable multimedia devices, image compression techniques utilizing several signal processing architectures and algorithms. In numerous multimedia applications, human beings are able to congregate practical information from somewhat erroneous outputs. Therefore, exact outputs are not necessary to produce.  In Digital signal processing system, adders play a vital role as an arithmetic module  in fixing the power and area utilization of the system. The trade off parameters such as area, time and power utilization also the fault tolerance environment of few applications have employed as a base for the adverse development and use of approximate adders.  In this paper, various types of existing adders, approximate adders are analyzed based on  the area, delay and  power consumption.  Also an approximate, high speed and power efficient adder is proposed which yields the better performance than the existing adders.  It can be used in various image processing applications, data mining and where the accurate outputs are not needed.  The existing and proposed approximate adders are simulated by using Xilinx ISE for time and area utilization.  Power simulation has been done by using Microwind Software.