PROJECT TITLE :

An area and power efficient adder-based stepwise linear interpolation for Digital Signal Processing

ABSTRACT:

Linear interpolation is frequently employed in Digital Signal Processing applications to reconstruct signals, e.g., image, and audio processing, for that the multiplier and divider are two power- and area-hungry operators. Since most nature phenomena don't seem to be precisely representable in linear forms, it's inefficient to use multiplier-based linear interpolation (MBLI) for correct linear curve fitting. In this paper, space- and power-efficient adder-based stepwise linear interpolation (ABSI) is proposed to emulate the behavior of standard linear interpolation. As a test vehicle for system demonstrations and performance evaluations, a general purpose display controller for applying an interpolationbased image/video scaling engine and overdrive for multimedia displays like televisions, monitors, and projectors, was designed. Compared with a scaling engine using typical MBLI, a scaling engine using the proposed ABSI contains a similar scaling quality in terms of the height signalto- noise ratio (PSNR), whereas reducing the area and power consumption by 45% and forty four%, respectively. Furthermore, as compared with the compression/decompression of an overdrive using typical MBLI, the info compression/decompression of the overdrive with the proposed ABSI shows a comparable compression/ decompression quality whereas reducing the realm and power consumption by forty sixp.c and forty fivepercent, respectively.


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