Hybrid error concealment schemes for broadcast video transmission over ATM networks

Two hybrid error concealment schemes based on application of forward error control (FEC) coding in combination with passive error concealment techniques to different layers of coded data in a video transmission system are evaluated. It is shown that use of passive error concealment schemes alone gen...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 1999-09, Vol.9 (6), p.868-881, Article 868
Main Authors: Bystrom, M., Parthasarathy, V., Modestino, J.W.
Format: Article
Language:English
Subjects:
Applied sciences
Asynchronous transfer mode
Bandwidth
Broadcasting
Channels
Circuits
Coding
Control systems
Error correction
Error correction codes
Errors
Exact sciences and technology
Forward error correction
Image processing
Image quality
Image reconstruction
Information, signal and communications theory
Layout
Multimedia communication
Protection
Signal processing
Telecommunications and information theory
Video sequences
Video transmission
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Summary:Two hybrid error concealment schemes based on application of forward error control (FEC) coding in combination with passive error concealment techniques to different layers of coded data in a video transmission system are evaluated. It is shown that use of passive error concealment schemes alone generally does not provide sufficient protection against channel errors, especially in the case of video sequences with significant motion or scene changes. Motivated by these observations, a third hybrid scheme is introduced; this scheme involves adaptive application of FEC codes to high-priority information depending on the level of motion in a sequence. It is shown that through application of this adaptive motion-based scheme, significant savings in bandwidth may be obtained at the expense of only a negligible decrease in reconstructed image quality. Implementation of adaptive motion-based FEC coding in a multiresolution asynchronous transfer mode framework is discussed, and metrics for computing motion in both a subband and an MPEG-2 coding system are introduced.
ISSN:1051-8215
1558-2205
DOI:10.1109/76.785725