| Autor: |
Alexandre Mercat, Marko Viitanen, Sami Ahovainio, Jarno Vanne |
| Přispěvatelé: |
Tampere University, Computing Sciences |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
ISCAS |
| Popis: |
High Efficiency Video Coding (HEVC) creates the conditions for cost-effective video transmission and storage but its inherent computational complexity calls for efficient parallelization techniques. This paper provides HEVC encoders with a holistic parallelization scheme that exploits parallelism at data, thread, and process levels at the same time. The proposed scheme is implemented in the practical Kvazaar open-source HEVC encoder. It makes Kvazaar exploit parallelism at three levels: 1) Single Instruction Multiple Data (SIMD) optimized coding tools at the data level; 2) Wavefront Parallel Processing (WPP) and Overlapped Wavefront (OWF) parallelization strategies at the thread level; and 3) distributed slice encoding on multi-computer systems at the process level. Our results show that the proposed process-level parallelization scheme increases the coding speed of Kvazaar by 1.86× on two computers and up to 3.92× on five computers with +0.19% and +0.81% coding losses, respectively. Exploiting all these three parallelism levels on a five-computer setup gives almost a 25× speedup over a non-parallelized single-core implementation. acceptedVersion |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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