Khaled Jerbi

Publications (2)0 Total impact

• Source

  Available from: Olivier Déforges

  Article: Fast Hardware implementation of an Hadamard Transform Using RVC-CAL Dataflow Programming

  Khaled Jerbi, Matthieu Wipliez, Mickaël Raulet, Olivier Déforges, Marie Babel, Mohamed Abid
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  ABSTRACT: Implementing an algorithm to hardware platforms is generally not an easy task. The algorithm, typically described in a high-level specification language, must be translated to a low-level HDL language. The difference between models of computation (sequential versus fine-grained parallel) limits the efficiency of automatic translation. On the other hand, manual implementation is time-consuming, because the designer must take care of low level details, and write test benches to test the implementation's behavior. This paper presents a global design method going from high level description to implementation. The first step consists in describing an algorithm as a dataflow program with the RVC-CAL language. Next step is the functional verification of this description using a software framework. The final step consists in an automatic generation of an efficient hardware implementation from the dataflow program. The objective was to spend the most part of the conception time in an open source software platform. We used this method to quickly prototype and generate hardware implementation of the Hadamard transform, an algorithm used in many signal processing algorithms, from an RVC-CAL description.
  Proc. of 5th IEEE International Conference on Embedded and Multimedia Computing.
• Source

  Available from: Olivier Déforges

  Article: Design of an Embedded Low Complexity Image Coder using CAL language

  Khaled Jerbi, Mickaël Raulet, Olivier Déforges, Mohamed Abid
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  ABSTRACT: The increasing complexity of image codecs and the time to market requires a high level design. Caltrop Actor Language (CAL) is a domain-specific language that provides useful abstractions for dataflow programming with actor. It has been chosen by the ISO/IEC standardization organization in the new MPEG standard called Reconfigurable Video Coding. This framework is adopted to design a multitude of codecs by combining actors. We present in this paper the specification and synthesis of the image coder LAR (Locally adaptive resolution) using the CAL framework. An HDL description and generation tools are used. The results show that such a high level design is possible. The quality of the resulting decoder implementation turns out to be better than that of a VHDL reference design. In the following, the main parts of the LAR coder will be presented; we will introduce the basic notions of the CAL language and its infrastructure (edition, simulation and HDL synthesis tools) and the results will be discussed.