Power exploration for data dominated video applications
ISLPED '96 Proceedings of the 1996 international symposium on Low power electronics and design
Formalized methodology for data reuse exploration for low-power hierarchical memory mappings
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Strategy for power-efficient design of parallel systems
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
On the data reuse and memory bandwidth analysis for full-search block-matching VLSI architecture
IEEE Transactions on Circuits and Systems for Video Technology
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Data access usually leads to more than 50% of the power cost in a modern signal processing system. To realize a low-power design, how to reduce the memory access power is a critical issue. Data reuse (DR) is a technique that recycles the data read from memory and can be used to reduce memory access power. In this paper, a systematic method of DR exploration for low-power architecture design is presented. For a start, the signal processing algorithms should be formulated as the nested loops structures, and data locality is explored by use of loop analysis. Then, corresponding DR techniques are applied to reduce memory access power. The proposed design methodology is applied to the motion estimation (ME) algorithms of H.264 video coding standard. After analyzing the ME algorithms, suitable parallel architectures and processing flows of the integer ME (IME) and fractional ME (FME) are proposed to achieve efficient DR. The amount of memory access is respectively reduced to 0.91 and 4.37% in the proposed IME and FME designs, and thus lots of memory access power is saved. Finally, the design methodology is also beneficial for other signal processing systems with a low-power consideration.