NDLI: Energy scalable approximate DCT architecture trading quality via boundary error-resiliency

Content Provider	IEEE Xplore Digital Library
Author	Garg, B. Bharadwaj, N.K. Sharma, G.K.
Copyright Year	2014
Description	Author affiliation: ABV-Indian Inst. of Inf. Technol. & Manage., Gwalior, India (Garg, B.; Bharadwaj, N.K.; Sharma, G.K.)
Abstract	High energy-efficiency is an imperative requirement for today's portable multimedia devices. Most image/video processing devices employ energy-devouring Discrete Cosine Transform (DCT) unit that limits their performance. We propose a novel low-complexity DCT architecture that exploits non-significance-driven complexity reduction techniques namely neighbor pixel similarity (NPS) and constant multiplication factor (CMF). Further, quality-energy tradeoff is achieved via error-resiliency at image-boundaries. We also present a novel quality metric PMSE (Perceivable Mean Square Error) that quantifies perceivable error. Our architecture consumes 49.2% less energy at the expense of 1.43dB less PSNR and requires only 45.4% area over well-known DCT architectures.
Sponsorship	IEEE Circuits Syst. Soc.
Starting Page	306
Ending Page	311
File Size	1681318
Page Count	6
File Format	PDF
ISBN	9781479933785
ISSN	21641706
DOI	10.1109/SOCC.2014.6948945
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discrete cosine transforms Computer architecture Complexity theory Approximation methods Measurement Equations Approximation algorithms architecture Discrete Cosine Transform (DCT) quality-energy tradeoff error-resiliency
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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