Digital integrated circuits: a design perspective
Digital integrated circuits: a design perspective
IEEE Transactions on Very Large Scale Integration (VLSI) Systems - Special issue on low power electronics and design
Parameter variations and impact on circuits and microarchitecture
Proceedings of the 40th annual Design Automation Conference
Statistical Timing Analysis using Levelized Covariance Propagation
Proceedings of the conference on Design, Automation and Test in Europe - Volume 2
VLSI Implementation of low-power high-quality color interpolation processor for CCD camera
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Proceedings of the 2007 IEEE/ACM international conference on Computer-aided design
Demosaicing: image reconstruction from color CCD samples
IEEE Transactions on Image Processing
Color plane interpolation using alternating projections
IEEE Transactions on Image Processing
Journal of Signal Processing Systems
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Power dissipation and robustness to process variation have conflicting design requirements. Scaling of voltage is associated with larger variations, while Vdd upscaling or transistor upsizing for parametric-delay variation tolerance can be detrimental for power dissipation. However, for a class of signal-processing systems, effective tradeoff can be achieved between Vdd scaling, variation tolerance, and "output quality." In this paper, we develop a novel low-power variation-tolerant algorithm/architecture for color interpolation that allows a graceful degradation in the peak-signal-to-noise ratio (PSNR) under aggressive voltage scaling as well as extreme process variations. This feature is achieved by exploiting the fact that all computations used in interpolating the pixel values do not equally contribute to PSNR improvement. In the presence of Vdd scaling and process variations, the architecture ensures that only the "less important computations" are affected by delay failures. We also propose a different sliding-window size than the conventional one to improve interpolation performance by a factor of two with negligible overhead. Simulation results show that, even at a scaled voltage of 77% of nominal value, our design provides reasonable image PSNR with 40% power savings.