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A 0.7-V 1.8-mW H.264/AVC 720p Video Decoder

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4 Author(s)
Sze, V. ; Microsyst. Technol. Labs., Massachusetts Inst. of Technol., Cambridge, MA, USA ; Finchelstein, D.F. ; Sinangil, M.E. ; Chandrakasan, A.P.

The H.264/AVC video coding standard can deliver high compression efficiency at a cost of increased complexity and power. The increasing popularity of video capture and playback on portable devices requires that the power of the video codec be kept to a minimum. This work implements several architecture optimizations such as increased parallelism, pipelining with FIFOs, multiple voltage/frequency domains, and custom voltage-scalable SRAMs that enable low voltage operation to reduce the power of a high-definition decoder. Dynamic voltage and frequency scaling can efficiently adapt to the varying workloads by leveraging the low voltage capabilities and domain partitioning of the decoder. An H.264/AVC Baseline Level 3.2 decoder ASIC was fabricated in 65-nm CMOS and verified. For high definition 720p video decoding at 30 frames per second (fps), it operates down to 0.7 V with a measured power of 1.8 mW, which is significantly lower than previously published results. The highly scalable decoder is capable of operating down to 0.5 V for decoding QCIF at 15 fps with a measured power of 29 muW.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:44 ,  Issue: 11 )

Date of Publication:

Nov. 2009

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