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13th IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP'02)
Reduced Power Consumption for MPEG Decoding with LNS
San Jose, California
July 17-July 19
ISBN: 0-7695-1712-9
| ASCII Text | x | ||
| Mark G. Arnold, "Reduced Power Consumption for MPEG Decoding with LNS," 2012 IEEE 23rd International Conference on Application-Specific Systems, Architectures and Processors, pp. 65, 13th IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP'02), 2002. | |||
| BibTex | x | ||
| @article{ 10.1109/ASAP.2002.1030705, author = {Mark G. Arnold}, title = {Reduced Power Consumption for MPEG Decoding with LNS}, journal ={2012 IEEE 23rd International Conference on Application-Specific Systems, Architectures and Processors}, volume = {0}, year = {2002}, issn = {1063-6862}, pages = {65}, doi = {http://doi.ieeecomputersociety.org/10.1109/ASAP.2002.1030705}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, } | |||
| RefWorks Procite/RefMan/Endnote | x | ||
| TY - CONF JO - 2012 IEEE 23rd International Conference on Application-Specific Systems, Architectures and Processors TI - Reduced Power Consumption for MPEG Decoding with LNS SN - 1063-6862 SP EP A1 - Mark G. Arnold, PY - 2002 KW - Computer Arithmetic KW - Logarithmic Number Systems (LNS) KW - MPEG KW - multi-media KW - Discrete Cosine Transform(DCT) KW - Low Power Design VL - 0 JA - 2012 IEEE 23rd International Conference on Application-Specific Systems, Architectures and Processors ER - | |||
By reducing the accuracy of the Logarithmic Number System (LNS) it is possible to achieve lower power consumption for multimedia applications, such as MPEG, without significantly lowering the visual quality of the output. An LNS wordsize of 8 to 10 bits produces a comparable MPEG output as a fixed-point wordsize of 14 to 16 bits. The switching activity of an LNS ALU that computes the Inverse Discrete Cosine Transform(IDCT) is one quarter that of fixed point, implying lower power consumption. By skipping inputs that are zero (which MPEG can do naturally with its run-length coding and zigzag ordering) the switching activity of LNS MPEG becomes one-tenth that of fixed point, in contrast to the minimal impact zero skipping has on fixed-point power consumption.
Index Terms:
Computer Arithmetic, Logarithmic Number Systems (LNS), MPEG, multi-media, Discrete Cosine Transform(DCT), Low Power Design
Citation:
Mark G. Arnold, "Reduced Power Consumption for MPEG Decoding with LNS," asap, pp.65, 13th IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP'02), 2002
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