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A majority of the portable multimedia devices employ various Signal Processing algorithms and architecture. In all such devices low power is the major concern. In most of the multimedia applications, useful information is gathered from slightly erroneous outputs. There are many cases, where low power consumption is preferred over exactness or accuracy of the devices. Most of these DSP blocks implement image and video processing algorithms, where the ultimate output is either an image or a video for human consumption. Human beings have limited perceptual abilities when interpreting an image or a video. This allows the outputs of these algorithms to be numerically approximate rather than accurate. This relaxation on numerical exactness provides some freedom to carry out imprecise or approximate computation.