Error concealment of transform coded images with continuous QoS

Transmission of block-based transform coded images over lossy packet networks is subject to packet losses, causing blocks to be lost or damaged. We propose a new hybrid error concealment algorithm to achieve continuous QoS in terms of both image quality and reconstruction time. It integrates the dc...

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Bibliographic Details
Main Authors: Su, X., Shang, Y.
Format: Conference Proceeding
Language:English
Subjects:
Applied sciences
Artificial intelligence
Computer errors
Computer networks
Computer science
control theory
systems
Delay
Discrete cosine transforms
Electronic mail
Exact sciences and technology
Image reconstruction
Interpolation
IP networks
Pattern recognition. Digital image processing. Computational geometry
Propagation losses
Quality of service
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Description
Summary:Transmission of block-based transform coded images over lossy packet networks is subject to packet losses, causing blocks to be lost or damaged. We propose a new hybrid error concealment algorithm to achieve continuous QoS in terms of both image quality and reconstruction time. It integrates the dc concealment with the information-restoration scheme, and provides a continuous range of time-quality trade-offs by controlling percentage of the missing blocks to be reconstructed by the dc concealment. Extensive experimental results show that our approach works well for both homogeneous and textured images, and achieves high-quality images in short time.
DOI:10.1109/ITCC.2004.1286736