A
Ari Koivula
Researcher at Tampere University of Technology
Publications - 8
Citations - 173
Ari Koivula is an academic researcher from Tampere University of Technology. The author has contributed to research in topics: Encoder & Image compression. The author has an hindex of 5, co-authored 8 publications receiving 143 citations.
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Proceedings ArticleDOI
Kvazaar: Open-Source HEVC/H.265 Encoder
TL;DR: Kvazaar is an academic software video encoder for the emerging High Efficiency Video Coding (HEVC/H.265) standard and it has got a key role in three Eureka Celtic-Plus projects in the fields of 4K TV broadcasting, virtual advertising, Video on Demand, and video surveillance.
Proceedings ArticleDOI
Kvazaar HEVC encoder for efficient intra coding
TL;DR: Compared to a single-threaded C++ implementation of x265, Kvazaar improves rate-distortion performance and increases encoding speed in both high-quality and high-speed test cases.
Proceedings ArticleDOI
Parallelization of Kvazaar HEVC intra encoder for multi-core processors
TL;DR: Key parallelization strategies of the Kvazaar HEVC intra encoder for multicore processors are introduced and its rate-distortion-complexity characteristics are superior to other public implementations in all-intra (AI) coding.
Proceedings ArticleDOI
AVX2-optimized Kvazaar HEVC intra encoder
TL;DR: This work shows that optimizing primarily these functions doubles the coding speed of a single-threaded Kvazaar intra encoder for the same rate-distortion performance, justifying that Kvazar is currently the leading open-source HEVC intra encoding in terms of real-time coding speed and efficiency.
Proceedings ArticleDOI
Performance evaluation of Kvazaar HEVC intra encoder on Xeon Phi many-core processor
TL;DR: This paper analyzes parallel scalability and coding speed of the open-source Kvazaar HEVC intra encoder on Intel Xeon Phi 61-core coprocessor that supports up to four hardware threads per core to promise excellent speed for Kvazar on massively parallel processors equipped with more powerful cores.