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Bücher Englische Bücher Wissen & Bildung Naturwissenschaft, Medizin, Informatik, Technik Informatik & EDV High-performance Video Decoding using Graphics Processing Units
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High-performance Video Decoding using Graphics Processing Units
Biao Wang (Taschenbuch, Englisch)
★★★★★
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Beschreibung
The increasing demand of decoding high-quality videos can lead to a challenging com-
putational requirement for conventional Central Processing Unit (CPU) architectures.
Graphics Processing Units (GPUs) in general provide higher computational power
than CPUs. Efficient GPU execution, however, requires massive parallelism and little ex-
ecuting divergence, two criteria are not fully met by all… video decoding kernels. This thesis
exploits how GPUs can be effectively used in video decoding applications. The challenges
include proper workload distribution between the CPU and GPU, task optimizations on
two heterogeneous devices, and efficient communication between them.
A complete parallel HEVC decoder was proposed for heterogeneous CPU+GPU
systems. We exploited available decoding parallelism on the CPU, GPU, and between the
two devices simultaneously. On top of the parallel design, two workload balancing schemes
were implemented, in order to adapt computation resource variation on CPU and GPU.
In addition, an energy measurement module was developed for energy efficiency analysis.
Evaluated results showed that suitable decoding kernels can be accelerated substan-
tially (up to 28.2×) on GPUs at the kernel level. At the application level, using GPU
architecture can provide significant acceleration when only a low number (1 to 8) of CPU
cores are available. On a system consisting of an NVIDIA Titan X Maxwell GPU and an
Intel Xeon E5-2699v3 CPU, with four CPU cores, the proposed HEVC decoder delivers
167 frames per second for 4K videos, corresponding to a speedup of 2.2× over the state-
of-the-art CPU decoder using four CPU cores. When more CPU cores (>8) are employed,
the benefit of using GPU vanishes and the performance is eventually outperformed by the
CPU decoder due to GPU overloading. With respect to energy, because of its high power
consumption GPU architecture is not as efficient as the CPU for HEVC decoding. Dieses Produkt haben wir gerade leider nicht auf Lager.
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Technische Daten
Erscheinungsdatum
06.06.2018
Sprache
Englisch
EAN
9783746731001
Herausgeber
epubli
Sonderedition
Nein
Autor
Biao Wang
Seitenanzahl
176
Auflage
1
Einbandart
Taschenbuch
Lesealter
1-99
Schlagwörter
GPU, Video codec, HEVC, high performance
Thema-Inhalt
UB - Informationstechnik (IT), allgemeine Themen
Höhe
297 mm
Breite
21 cm
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★★★★★
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