Ing. Vojtěch Mrázek

VAŠÍČEK Zdeněk, MRÁZEK Vojtěch and SEKANINA Lukáš. Towards Low Power Approximate DCT Architecture for HEVC Standard. In: Proc. of the 2017 Design, Automation & Test in Europe Conference & Exhibition (DATE). Lausanne: European Design and Automation Association, 2017, pp. 1576-1581. ISBN 978-3-9815370-9-3.
Publication language:english
Original title:Towards Low Power Approximate DCT Architecture for HEVC Standard
Title (cs):Návrh nízkopříkonové DCT architektury pro standard HEVC
Pages:1576-1581
Proceedings:Proc. of the 2017 Design, Automation & Test in Europe Conference & Exhibition (DATE)
Conference:Design, Automation and Test in Europe 2017
Place:Lausanne, CH
Year:2017
ISBN:978-3-9815370-9-3
Publisher:European Design and Automation Association
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Keywords
Genetic programming, relaxed equivalence, approximate computing, HEVC, DCT
Annotation
Video processing performed directly on IoT nodes is one of the most performance as well as energy demanding applications for current IoT technology. In order to support realtime high-definition video, energy-reduction optimizations have to be introduced at all levels of the video processing chain. This paper deals with an efficient implementation of Discrete Cosine Transform (DCT) blocks employed in video compression based on the High Efficiency Video Coding (HEVC) standard. The proposed multiplierless 4-input DCT implementations contain approximate adders and subtractors that were obtained using genetic programming. In order to manage the complexity of evolutionary approximation and provide formal guarantees in terms of errors of key circuit components, the worst and average errors were determined exactly by means of Binary decision diagrams. Under conditions of our experiments, approximate 4- input DCTs show better quality/power trade-offs than relevant implementations available in the literature. For example, 25% power reduction for the same error was obtained in comparison with a recent highly optimised implementation.
BibTeX:
@INPROCEEDINGS{
   author = {Zden{\v{e}}k Va{\v{s}}{\'{i}}{\v{c}}ek and Vojt{\v{e}}ch
	Mr{\'{a}}zek and Luk{\'{a}}{\v{s}} Sekanina},
   title = {Towards Low Power Approximate DCT Architecture for HEVC
	Standard},
   pages = {1576--1581},
   booktitle = {Proc. of the 2017 Design, Automation \& Test in Europe
	Conference \& Exhibition (DATE)},
   year = {2017},
   location = {Lausanne, CH},
   publisher = {European Design and Automation Association},
   ISBN = {978-3-9815370-9-3},
   language = {english},
   url = {http://www.fit.vutbr.cz/research/view_pub.php?id=11299}
}

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