NDLI: Fast mode decision algorithm based on thread-level parallelization and thread slipstreaming in H.264 video coding

Content Provider	IEEE Xplore Digital Library
Author	Ju-Ho Hyun
Copyright Year	2010
Description	Author affiliation: Multimedia Platform Lab, DMC R&D Center, DMC Business, Samsung Electronics (Ju-Ho Hyun)
Abstract	As multicore processors have become a general in computer architecture, parallel algorithms and software designs based on thread-level parallelization are rapidly gaining importance in compute-intensive applications. However, it is difficult to exploit thread-level parallelism for multimedia applications like video encoders due to complicated data/control dependences. In particular, the H.264 encoder has data dependences between the inter mode decision and the intra mode decision, especially when rate-distortion optimization (RDO) is used. This paper proposes a new RDO mode decision algorithm based on thread-level parallelization for the H.264 encoder, which can efficiently resolve the dependences and exploit thread-level parallelism for fast mode decision. The proposed methods, slipstreaming and skipping mechanisms reduce the total encoding time without PSNR loss and bit rate increment. These mechanisms can remove most of computation overhead for RDO intra mode decision as well as improve the computational performance of motion estimation. The experiments performed with JM12.2 showed that the proposed method reduces the total encoding time by 31.3% on average while maintaining the identical PSNR and bit rate.
Starting Page	655
Ending Page	660
File Size	1033910
Page Count	6
File Format	PDF
ISBN	9781424474912
ISSN	1945788X
e-ISBN	9781424474936
DOI	10.1109/ICME.2010.5582556
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-19
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Instruction sets Multicore processing Bit rate Entropy coding PSNR multicore H.264 video coding RDO mode decision thread-level parallelization
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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