Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Robust and Energy Efficient Multimedia Systems via Likelihood Processing

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
2 Author(s)
Abdallah, R.A. ; Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA ; Shanbhag, N.R.

This paper presents likelihood processing (LP) for designing robust and energy-efficient multimedia systems in the presence of nanoscale non-idealities. LP exploits error statistics of the underlying hardware to compute the probability of a particular bit being a one or a zero. Multiple output observations are generated via either: 1) modular redundancy (MR), 2) estimation, or 3) exploiting spatio-temporal correlation. Energy efficiency and robustness of a 2D discrete-cosine transform (DCT) image codec employing LP is studied. Simulations in a commercial 45-nm CMOS process show that LP can tolerate up to 100×, and 5× greater component error probability as compared to conventional and triple-MR (TMR)-based systems, respectively, while achieving a peak-signal-to-noise ratio (PSNR) of 30 dB at a pre-correction error rate of 20%. Furthermore, LP is able to achieve energy savings of 71% over TMR at a PSNR of 28 dB, while tolerating a pre-correction error rate of 4%.

Published in:

Multimedia, IEEE Transactions on  (Volume:15 ,  Issue: 2 )