Residual Syntax Elements Analysis and Design Targeting High-Throughput HEVC CABAC

Video processing is a topic of major interest due to the demand for real-time delivery of increasing resolution videos. Moreover, Internet traffic related to high-quality video processing tends to be the dominant type of information transmitted. The high-efficiency video coding (HEVC) standard is a...

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Veröffentlicht in:IEEE transactions on circuits and systems. I, Regular papers Jg. 67; H. 2; S. 475 - 488
Hauptverfasser: Ramos, Fabio Luis Livi, Saggiorato, Alessandro Via Piana, Zatt, Bruno, Porto, Marcelo, Bampi, Sergio
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.02.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Adaptive algorithms
Arithmetic coding
Binary codes
CABAC
Encoding
Entropy
entropy encoding
Hardware
hardware design
HEVC
high-throughput processing
Image processing
real-time video processing
residual syntax elements
Streaming media
Syntactics
Syntax
Throughput
Transforms
Video compression
Video transmission
ISSN:1549-8328, 1558-0806
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Zusammenfassung:Video processing is a topic of major interest due to the demand for real-time delivery of increasing resolution videos. Moreover, Internet traffic related to high-quality video processing tends to be the dominant type of information transmitted. The high-efficiency video coding (HEVC) standard is a suitable and efficient choice to overcome the challenges regarding the matter presented. In HEVC, the final encoding step is the entropy encoding, in which the context-adaptive binary arithmetic coding (CABAC) algorithm is the sole option used. Many recent research efforts have been successful in enhancing CABAC throughput for a hardware approach, which is a remarkable difficulty due to the intrinsic dependencies generated by the algorithm. The throughput improvement happens due to the capability of these entropy-encoding designs to consume multiple input data coming from the previous encoding steps. Nevertheless, the same care in terms of data generation shall occur for the stage right before the CABAC block. Otherwise, a transfer of the potential processing bottleneck would move to the input data fabrication. Therefore, this paper proposes a novel scheme, named multi residual syntax element treatment (MRSET), to be compliant with these recent high-throughput CABAC designs, being able to supply the entropy coding with enough input data and thus it would not starve. A complete analysis involving HEVC reference software and recommend video sequences occurred to drive MRSET inception. Different multi-core MRSET hardware architectures results are provided, and the best suitable option is defined based on the characteristics of the state-of-the-art CABAC architectures.
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ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2019.2932891