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University of Sciences and Technology Houari Boumediene, Algeria
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3 Papers

A Fast and Efficient Inter Mode Decision Algorithm for the H.264/AVC Video Coding Standard

Topic: Image and Video Processing, Compression and Segmentation

Authors: Skoudarli Abdellah 1 , Nibouche Mokhtar 2 and Serir Amina 3

Affiliations: 1 Faculte of Electronics and Informatics USTHB, Algeria , 2 Frenchay Campus, United Kingdom , 3 FEI USTHB, Algeria

Digital Object Identifier: 10.5220/0004527800790085

Proceedings of SIGMAP 2013/ICETE, ISBN: 978-989-8565-74-7

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The H.264/AVC video coding standard is used in a wide range of applications from video conferencing to high-definition TV. Compared to the previous standard, the H.264/AVC has significantly better performance in terms of PSNR and visual quality at the same bit rate. It uses a complex mode decision technique based on rate-distortion optimization (RDO). Therefore, this technique introduces a high computational complexity. However, the computational complexity is one key challenge for the high efficient compression. In order to reduce the H.264/AVC complexity a new efficient and fast mode decision algorithm, based on the spatial homogeneity and temporal stationary characteristics of the current macroblock, is proposed in this paper. The experimental results show that the proposed algorithm is able to reduce up to 66,90 % of the computational complexity compared to the high complexity algorithm in the JM16.1 reference software with tolerant performance degradation.
Collapse Button Related Ontology Subjects/Areas/Topics (4)
Image and Video Processing, Compression and Segmentation

Multimedia Signal Processing

Telecommunications
Multimedia

Service based Approach for Adaptability of Workflow Models - The Subcontracting Architecture

Topics: Virtual Enterprises; Business Modeling and Business Process Management; EA and Service Oriented Architecture (SOA)

Authors: Saida Boukhedouma 1 , Mourad Oussalah 2 , Zaia Alimazighi 3 and Dalila Tamzalit 2

Affiliations: 1 USTHB- FEI and University of Nantes, Algeria , 2 University of Nantes, France , 3 USTHB- FEI, Algeria

Digital Object Identifier: 10.5220/0004008702240231

Proceedings of ICEIS 2012, ISBN: 978-989-8565-12-9

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The environment of businesses is naturally unstable and dynamic due to increasing market constraints and events. Thus business processes are frequently subject to changes which must be supported by process models and systems that implement them. This paper deals with adaptation of IOWF (Inter-Organizational Workflow) process models based on services. It states conceptually, the most frequent adaptations that can be operated on IOWF models described through the concept of orchestration function which abstracts the control flow of the process. Thus, operations of adaptation turn to modification of services and transformation of the orchestration function describing the model. We particularly distinguish evolutive adaptation leading to expansion of the cooperation and/or the global functionality of the process.
Collapse Button Related Ontology Subjects/Areas/Topics (3)
Enterprise Information Systems

Software Agents and Internet Computing

Virtual Enterprises

EVOLUTION STYLES IN PRACTICE - Refactoring Revisited as Evolution Style

Topics: Software Maintenance; Knowledge Representation

Authors: Olivier Le Goaer 1 , Mourad Oussalah 1 , Dalila Tamzalit 1 and Djamel Serai 2

Affiliations: 1 LINA, University of Nantes, France , 2 Ecole des Mines de Douai, France

Digital Object Identifier: 10.5220/0001341401380143

Proceedings of ICSOFT 2007, ISBN: 978-989-8111-06-7

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The evolution of pure software systems remains a time-consuming and error-prone activity. But whatever the considered domain, recurring practices can be captured and reused to alleviate the subsequent amounts of effort. In this paper we propose to treat domain-specific problems-solutions pairs as first-class entities called “evolution styles”. As such, an evolution style is endowed with an instantiation mechanism and can be considered at different conceptual levels. Applied on arbitrary domains, an evolution style is intended to evolve a family of applications whereas its instances evolve given applications. The evolution style’s format is a component triple where each component is highly reusable. In this way, evolution styles are scalable knowledge fragments able to support large and complex evolutions, readily available to be played and replayed.
Collapse Button Related Ontology Subjects/Areas/Topics (10)
Applications

Knowledge-Based Systems

Pattern Recognition

Artificial Intelligence

Maintenance

Software Engineering

Knowledge Engineering and Ontology Development

Operational Research

Symbolic Systems
Knowledge Representation

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