Bonfring International Journal of Power Systems and Integrated Circuits

Online ISSN: 2277-5072 | Print ISSN: 2250-1088 | Frequency: 4 Issues/Year

Impact Factor: 0.651 | International Scientific Indexing(ISI) calculate based on International Citation Report(ICR)

Design of High Accuracy Truncated Multiplexer for DCT Applications

Rima Babudas and G. Anusha

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Abstract:

Discrete cosine transform (DCT) is a widely used tool in image and video compression applications. Adders and multipliers are the main components in the DCT implementation. Recently, the high-throughput DCT designs have been adopted to fit the requirements of real-time applications. This paper proposes a pseudo carry compensation truncation (PCT) scheme for errorcompensation using multiplexer which deal with the truncation errors and to achieve low-error and highthroughput discrete cosine transform (DCT) design. Instead of the 12 bits used in previous works, 9-bit distributed arithmetic-precision is chosen for this work so as to meet peak-signal-to-noise-ratio (PSNR) requirements. The design is implemented using VHDL on 0.18μm technology and proposed truncation scheme is applied to an image compression algorithm.

Keywords: Discrete Cosine Transform(DCT), Distributed Arithmetic(DA) ,Truncation Scheme

Volume: 2 | Issue: Special Issue on Communication Technology Interventions for Rural and Social Development

Pages: 129-132

Issue Date: February , 2012