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Parallel CABAC for low power video coding

9 years 4 months ago
Parallel CABAC for low power video coding
With the growing presence of high definition video content on battery-operated handheld devices such as camera phones, digital still cameras, digital camcorders, and personal media players, it is becoming ever more important that video compression be power efficient. A popular form of entropy coding called Context-Based Adaptive Binary Arithmetic Coding (CABAC) provides high coding efficiency but has limited throughput. This can lead to high operating frequencies resulting in high power dissipation. This paper presents a novel parallel CABAC scheme which enables a throughput increase of N-fold (depending on the degree parallelism), reducing the frequency requirement and expected power consumption of the coding engine. Experiments show that this new scheme (with N=2) can deliver ~2x throughput improvement at a cost of 0.76% average increase in bit-rate or equivalently a decrease in average PSNR of 0.025dB on five 720p resolution video clips when compared with H.264/AVC.
Vivienne Sze, Anantha P. Chandrakasan, Madhukar Bu
Added 20 Oct 2009
Updated 20 Oct 2009
Type Conference
Year 2008
Where ICIP
Authors Vivienne Sze, Anantha P. Chandrakasan, Madhukar Budagavi, Minhua Zhou
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