Grey temporal error concealment

Cheng‐Hsiung Hsieh (Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung, Taiwan)
Ching‐Hua Liu (Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung, Taiwan)
Kuan‐Chieh Hsiung (Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung, Taiwan)
Qiangfu Zhao (Graduate Department of Computer and Information Systems, The University of Aizu, Aizu‐Wakamatsu City, Japan)

Grey Systems: Theory and Application

ISSN: 2043-9377

Publication date: 19 August 2011

Abstract

Purpose

The purpose of this paper is to solve the pack loss problem of video transmitted over error‐prone channels. Pack loss generally affects the visual quality of reconstructed frames significantly. Consequently, a grey approach to error concealment (EC) is proposed.

Design/methodology/approach

Note that missing information in error blocks can be found before and after the error frame. Thus, two adjacent error‐free frames are utilized to conceal error blocks caused by packet loss. This paper presents an EC approach based on grey polynomial interpolation (GPI) which is called the GTEC. In the GTEC, the following stages are involved. First, error blocks due to packed loss are detected. Then, optimal reference blocks in adjacent frames are found through boundary matching algorithm (BMA). Finally, estimated blocks are obtained by the GPI. By replacing error blocks with the estimated blocks, EC is completed in the GTEC.

Findings

In the simulation, the proposed GTEC is compared with the EC scheme in H.264 and the BMA. With packet loss rates of 1, 3, 5, and 10 per cent, the proposed GTEC approach has better performance than EC schemes in H.264 and BMA, both in peak signal‐to‐noise ratio and visual quality. Consequently, it provides an alternative where EC is required.

Originality/value

The value of GTEC proposed in this paper is not only in better performance but also in the originality to apply grey scheme, i.e. GPI, in the field of EC.

Keywords

Citation

Hsieh, C., Liu, C., Hsiung, K. and Zhao, Q. (2011), "Grey temporal error concealment", Grey Systems: Theory and Application, Vol. 1 No. 2, pp. 138-147. https://doi.org/10.1108/20439371111163765

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Publisher

:

Emerald Group Publishing Limited

Copyright © 2011, Emerald Group Publishing Limited

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