9 February 2015 Real-time high-resolution downsampling algorithm on many-core processor for spatially scalable video coding
Author Affiliations +
Abstract
The progression toward spatially scalable video coding (SVC) solutions for ubiquitous endpoint systems introduces challenges to sustain real-time frame rates in downsampling high-resolution videos into multiple layers. In addressing these challenges, we put forward a hardware accelerated downsampling algorithm on a parallel computing platform. First, we investigate the principal architecture of a serial downsampling algorithm in the Joint-Scalable-Video-Model reference software to identify the performance limitations for spatially SVC. Then, a parallel multicore-based downsampling algorithm is studied as a benchmark. Experimental results for this algorithm using an 8-core processor exhibit performance speedup of 5.25 × against the serial algorithm in downsampling a quantum extended graphics array at 1536p video resolution into three lower resolution layers (i.e., Full-HD at 1080p, HD at 720p, and Quarter-HD at 540p). However, the achieved speedup here does not translate into the minimum required frame rate of 15 frames per second (fps) for real-time video processing. To improve the speedup, a many-core based downsampling algorithm using the compute unified device architecture parallel computing platform is proposed. The proposed algorithm increases the performance speedup to 26.14 × against the serial algorithm. Crucially, the proposed algorithm exceeds the target frame rate of 15 fps, which in turn is advantageous to the overall performance of the video encoding process.
© 2015 SPIE and IS&T
Adamu M. Buhari, Adamu M. Buhari, Huo-Chong Ling, Huo-Chong Ling, Vishnu M. Baskaran, Vishnu M. Baskaran, KokSheik Wong, KokSheik Wong, } "Real-time high-resolution downsampling algorithm on many-core processor for spatially scalable video coding," Journal of Electronic Imaging 24(1), 013025 (9 February 2015). https://doi.org/10.1117/1.JEI.24.1.013025 . Submission:
JOURNAL ARTICLE
11 PAGES


SHARE
RELATED CONTENT

Spatial-domain resolution-scalable video coding
Proceedings of SPIE (October 21 1993)
Temporal filtering of coded video
Proceedings of SPIE (September 15 1996)
Rate control for scalable video model
Proceedings of SPIE (July 30 2006)
Scalable extension of MPEG-2 for coding 10-bit video
Proceedings of SPIE (April 30 1994)

Back to Top