Skip to Main content Skip to Navigation
Theses

Etude d'architectures VLSI numériques parallèles et asynchrones pour la mise en oeuvre de nouveaux algorithmes d'analyse et rendu d'images

Abstract : Digital visual communication applications are evolving towards the incorporation of new functionalities that go beyond image compression: universal access, content-based interactivity, synthetic-natural hybrid coding. A brief introduction to advanced image coding techniques helps foreseeing the evolution of the computing power and the level of genericity that will be necessary to implement such "second-generation" systems. A synthesis about the evolution of VLSI circuits dedicated to image analysis, compression, and rendering, is presented, and architectural limitations of "media-processors" are identified. This thesis propounds to combine massive parallelism and fine-grain asynchronism, to provide new algorithmic and architectural perspectives for the design of digital VLSI circuits. An introduction to the concepts of asynchronism, at the language, algorithmic, architectural, and VLSI circuit levels allows one to understand better their meanings and potentialities. Starting from the use of functional asynchronism for image morphological filtering, the design of an asynchronous VLSI cellular array is presented, resulting in an 800.000 transistors CMOS 0.5µ prototype circuit. The combination of parallelism and asynchronism is eventually generalized through the definition of a programmable coprocessor architecture for image analysis-synthesis. Original algorithmic examples, based on a mixed SPMD-cellular-associative-dataflow control, illustrate the joint use of several levels of asynchronism. This work demonstrates that relaxing synchronization and sequencing constraints, from the specification to the hardware design of integrated systems, enables one to fully take advantage of the inherent parallelism of such algorithms and of the potentialities of VLSI technologies.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00465691
Contributor : Frédéric Robin <>
Submitted on : Saturday, March 20, 2010 - 10:16:13 PM
Last modification on : Friday, October 23, 2020 - 4:37:47 PM
Long-term archiving on: : Tuesday, June 22, 2010 - 10:56:16 AM

Identifiers

  • HAL Id : tel-00465691, version 1

Collections

Citation

Frédéric Robin. Etude d'architectures VLSI numériques parallèles et asynchrones pour la mise en oeuvre de nouveaux algorithmes d'analyse et rendu d'images. Micro et nanotechnologies/Microélectronique. Ecole nationale supérieure des telecommunications - ENST, 1997. Français. ⟨tel-00465691⟩

Share

Metrics

Record views

310

Files downloads

1147