An Evaluation of a Hybrid-Logarithmic Number System DCT/IDCT Algorithm

Lee, Peter (2005) An Evaluation of a Hybrid-Logarithmic Number System DCT/IDCT Algorithm. In: IEEE International Symposium on Circuits and Systems. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1109/ISCAS.2005.1465722

Abstract

This paper presents an evaluation of an algorithm for performing the forward and inverse discrete cosine transforms (DCT) on digital images using a hybrid-logarithmic number system (hybrid-LNS) instead of linear binary arithmetic. The algorithm has been simulated using Matlab® where the accuracy of the fractional part of the logarithm has been limited to 8 bits and has been calculated using just 4, 6 or 8 binary address bits of the linear input data. The results show that it is possible to use this hybrid-LNS architecture to build multiplierless DCT and IDCT transforms having only a minimal reduction in image quality. The algorithm is suitable for implementation on existing mid-range FPGA technologies where there are limitations on the size of on-chip memory and high-speed computing elements.

Item Type: Conference or workshop item (Paper)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: J. Harries
Date Deposited: 19 Dec 2007 18:16
Last Modified: 09 Apr 2014 15:36
Resource URI: http://kar.kent.ac.uk/id/eprint/485 (The current URI for this page, for reference purposes)
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