Field programmable gate array implementation of variable-bins high efficiency video coding CABAC decoder with path delay optimisation

Context-based adaptive binary arithmetic coding (CABAC) is a single operation mode for entropy coding in the last video coding standard high-efficiency video coding. For high-resolution applications, the throughput of one bin/cycle is not sufficient and it is a very challenging task to implement pip...

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Vydáno v:IET image processing Ročník 13; číslo 6; s. 954 - 963
Hlavní autoři: Menasri, Wahiba, Skoudarli, Abdellah, Belhadj, Aichouche, Azzaz, Mohamed Salah
Médium: Journal Article
Jazyk:angličtina
Vydáno: The Institution of Engineering and Technology 01.05.2019
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ISSN:1751-9659, 1751-9667
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Abstract Context-based adaptive binary arithmetic coding (CABAC) is a single operation mode for entropy coding in the last video coding standard high-efficiency video coding. For high-resolution applications, the throughput of one bin/cycle is not sufficient and it is a very challenging task to implement pipeline and/or parallel CABAC decoding architecture by simply adding more stages. Indeed, the tight data dependencies make it difficult to parallelise and cause it to be a throughput bottleneck for video decoding. Consequently, in order to improve the CABAC decoder throughput, parallel and pipeline architectures are used in authors’ design. In this work, an algorithm-architecture adequation is proposed to implement a CABAC decoder on a field programmable gate array. Mainly, a new classification of 32 syntax elements is given to speed up the authors’ solution. Furthermore, the context selection and modelling of regular syntax elements are studied, designed and implemented. Finally, a novel technique of memories rearrangement to reduce the critical path delay required to process each binary symbol is proposed. As a result, the implementation can process 2.2 bins/cycle when operated at 123.49 MHz and exhibits an improved high-throughput of 271.678 Mbins/s. The hardware architecture is coded using hardware description language and synthesised using ISE Xilinx tools targeting the Virtex4 platform.
AbstractList Context‐based adaptive binary arithmetic coding (CABAC) is a single operation mode for entropy coding in the last video coding standard high‐efficiency video coding. For high‐resolution applications, the throughput of one bin/cycle is not sufficient and it is a very challenging task to implement pipeline and/or parallel CABAC decoding architecture by simply adding more stages. Indeed, the tight data dependencies make it difficult to parallelise and cause it to be a throughput bottleneck for video decoding. Consequently, in order to improve the CABAC decoder throughput, parallel and pipeline architectures are used in authors’ design. In this work, an algorithm‐architecture adequation is proposed to implement a CABAC decoder on a field programmable gate array. Mainly, a new classification of 32 syntax elements is given to speed up the authors’ solution. Furthermore, the context selection and modelling of regular syntax elements are studied, designed and implemented. Finally, a novel technique of memories rearrangement to reduce the critical path delay required to process each binary symbol is proposed. As a result, the implementation can process 2.2 bins/cycle when operated at 123.49 MHz and exhibits an improved high‐throughput of 271.678 Mbins/s. The hardware architecture is coded using hardware description language and synthesised using ISE Xilinx tools targeting the Virtex4 platform.
Author Belhadj, Aichouche
Skoudarli, Abdellah
Menasri, Wahiba
Azzaz, Mohamed Salah
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crossref_primary_10_1049_ipr2_12081
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Issue 6
Keywords field programmable gate array implementation
CABAC decoding architecture
algorithm-architecture adequation
field programmable gate arrays
bin/cycle
video coding standard high-efficiency video coding
hardware description languages
throughput bottleneck
arithmetic codes
path delay optimisation
critical path delay
high-throughput
context-based adaptive binary arithmetic coding
CABAC decoder throughput
frequency 123.49 MHz
binary codes
entropy coding
entropy codes
single operation mode
video coding
adaptive codes
2.2 bins/cycle
decoding
high-resolution applications
video decoding
variable-bins high efficiency video coding CABAC decoder
pipeline architectures
Language English
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  ident: e_1_2_7_11_1
– ident: e_1_2_7_31_1
  doi: 10.1109/ICSES.2012.6382256
– ident: e_1_2_7_19_1
  doi: 10.1109/JSSC.2011.2169310
– ident: e_1_2_7_26_1
  doi: 10.1109/TCSVT.2009.2020340
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Snippet Context-based adaptive binary arithmetic coding (CABAC) is a single operation mode for entropy coding in the last video coding standard high-efficiency video...
Context‐based adaptive binary arithmetic coding (CABAC) is a single operation mode for entropy coding in the last video coding standard high‐efficiency video...
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wiley
iet
SourceType Enrichment Source
Index Database
Publisher
StartPage 954
SubjectTerms 2.2 bins/cycle
adaptive codes
algorithm‐architecture adequation
arithmetic codes
bin/cycle
binary codes
CABAC decoder throughput
CABAC decoding architecture
context‐based adaptive binary arithmetic coding
critical path delay
decoding
entropy codes
entropy coding
field programmable gate array implementation
field programmable gate arrays
frequency 123.49 MHz
hardware description languages
high‐resolution applications
high‐throughput
path delay optimisation
pipeline architectures
Research Article
single operation mode
throughput bottleneck
variable‐bins high efficiency video coding CABAC decoder
video coding
video coding standard high‐efficiency video coding
video decoding
Title Field programmable gate array implementation of variable-bins high efficiency video coding CABAC decoder with path delay optimisation
URI http://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2018.6336
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Volume 13
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