A portable Video Tool Library for MPEG Reconfigurable Video Coding using LLVM representation

Gorin, Jérôme; Wipliez, Matthieu; Prêteux, Françoise; Raulet, Mickaël

doi:10.1109/dasip.2010.5706263

Cited by 9 publications

(5 citation statements)

References 9 publications

(6 reference statements)

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“…All the results presented in this section are reproducible by downloading this project and the associated library of coding tools from http://orcc.sf.net. The reader can refer to [21] to find information about this adaptive decoder and to [20] to find information about the actor representation it uses.…”

Section: Applications and Resultsmentioning

confidence: 99%

Optimized dynamic compilation of dataflow representations for multimedia applications

Gorin¹,

Raulet²,

Prêteux³

2012

Ann. Telecommun.

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To cite this version:Jérôme Gorin, Mickaël Raulet, Françoise Préteux. Optimized dynamic compilation of dataflow representations for multimedia applications. Annals of Telecommunications -annales des télécommunica-tions, Springer, 2013, 68 (3-4) Abstract This paper proposes two optimization methods based on dataflow representations and dynamic compilation that enhance flexibility and performance of multimedia applications. These optimization methods are intended to be used in an adaptive decoding context, or, in other terms, where decoders have the ability to adapt their decoding processes according to a bitstream. This adaptation is made possible by coupling the decoding information to process a stream inside a coded stream.In this paper, we use dataflow representations from the upcoming MPEG Reconfigurable Media Coding (RMC) standard to supply the decoding information to adaptive decoders. The benefits claimed by MPEG RMC are a reuse of coding tools between different specifications of decoder and an execution scalability on different processing units with a single specification, which can target either hardware and/or software platforms. These benefits are not yet achievable in practice as these specifications are not used at the receiver side in MPEG RMC. We valid these benefits and propose two optimizations for the generation and the execution of dataflow models: the first optimization takes benefits of the reuse of coding tools to reduce the time to obtain -configure -enforceable decoders. The second provides an efficient, dynamic and scalable execution according to the features of the execution platform. We show the practical impact of these two optimizations on two decoder representations compliant with the MPEG-4 part 2 Simple Profile standard and the MPEG-4 Advanced Video Coding standard. The results shows that configuration time can be reduced by 3 and the performance of decoders can be increased by 50%.

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Section: Applications and Resultsmentioning

confidence: 99%

Optimized dynamic compilation of dataflow representations for multimedia applications

Gorin¹,

Raulet²,

Prêteux³

2012

Ann. Telecommun.

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“…Following the concept of MPEG RVC, the Just-In-Time Adaptive Decoder Engine (JADE) was recently proposed [11]. This decoder is based on the virtual machine provided by the Low-Level Virtual Machine (LLVM) infrastructure to dynamically load and execute dataflow programs.…”

Section: B Run-time Networkmentioning

confidence: 99%

“…Its main innovation lies in the adoption of a data flow programming model. It uses the language RVC-CAL for specifying the FU and the XML Dataflow Format (XDF) [6] [11] for specifying the connection between the FUs. The RVC-CAL language is a textual notation that allows representations of the dataflow, the actors and their functionality.…”

Section: Data Flow Programmingmentioning

confidence: 99%

Functional units for 3D graphics decoders

Tulvan

Preda

2012

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)

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The main objective of this paper is to introduce the concept of reconfigurable graphic coding and an implementation of this concept under the form of a functional units library. The heterogeneity of data for 3D graphics objects representation requires the adaptability of the compression schemas. Although these schemas inherently share the same classical data processing chain, the components forming it may vary with respect to the dimension, range, correlation type. Based on the analysis of traditional, yet state of the art 3D graphics compression approaches, we propose a set of processing units. We show how this set can be configured/connected into a network to obtain reference decoders. Moreover, the network can be reconfigured at the run time, based on information that is provided with the encoded object. This modular concept of functional units allows optimized management of computation relative to the hardware architecture (CPU, GPU, FPGA, etc.).

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“…To manage the decoder configuration and to achieve platform independence, an LLVM-based tool known as the Just-In-Time Adaptive Decoder Engine (Jade) is chosen [4], [18]. Jade, which may be considered as an RVC-CAL specific virtual machine, operates as an abstract layer to generate an RVC decoder.…”

Section: Just-in-time Adaptive Decoder Enginementioning

confidence: 99%

Energy-aware decoder management: a case study on RVC-CAL specification based on just-in-time adaptive decoder engine

Ren

Juárez

Sanz

et al. 2014

IEEE Trans. Consumer Electron.

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Motivated by the pervasive use of multimedia applications in battery-powered portable devices, the latest video coding standards have been developed to enable higher data compression rates and decoding efficiencies. An MPEG Reconfigurable Video Coding (RVC) framework has been proposed to efficiently support multiple codec specifications and facilitate innovation in codec design. At the same time, an energy-aware design is expected to be included in video coding standards for the purpose of energy optimization of multimedia applications, which are known to create high computational loads. This paper proposes an energy-aware decoder manager based jointly on a Just-In-Time Adaptive Decoder Engine (Jade) and an energy estimation model. The model is driven by Performance Monitoring Counters (PMCs) and is fitted by the multivariate adaptive regression splines (MARS) method.The estimation results achieve average relative errors of less than 10%. In addition, the maximal model computation overhead is 4.58%. By combining the estimation model into the RVC framework, the experimental results show good potential for energy efficiency improvement with increases of up to 21.8% based on energy considerations 1 .

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A portable Video Tool Library for MPEG Reconfigurable Video Coding using LLVM representation

Cited by 9 publications

References 9 publications

Optimized dynamic compilation of dataflow representations for multimedia applications

Optimized dynamic compilation of dataflow representations for multimedia applications

Functional units for 3D graphics decoders

Energy-aware decoder management: a case study on RVC-CAL specification based on just-in-time adaptive decoder engine

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