Efficient drift-free signal-to-noise ratio scalability

Signal-to-noise ratio (SNR) scalability has been incorporated into the MPEG-2 video-coding standard to allow for the delivery of two services with the same spatial and temporal resolution but different levels of quality. In this paper, we begin by reviewing the performance of a single-loop SNR scala...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 2000-02, Vol.10 (1), p.70-82
Main Authors: Arnold, J.F., Fracter, M.R., Yaqiang Wang
Format: Article
Language:English
Subjects:
Applied sciences
Australia
Circuits
Coders
Coding
Decoding
Drift
Encoders
Encoding
Exact sciences and technology
Image processing
Information, signal and communications theory
Scalability
Signal processing
Signal resolution
Signal to noise ratio
Spatial resolution
Standards development
Telecommunications and information theory
Temporal resolution
Video coding
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Summary:Signal-to-noise ratio (SNR) scalability has been incorporated into the MPEG-2 video-coding standard to allow for the delivery of two services with the same spatial and temporal resolution but different levels of quality. In this paper, we begin by reviewing the performance of a single-loop SNR scalable encoder that is compliant with the MPEG-2 standard and demonstrate that its performance is limited by drift in the base layer. We also look at an alternative single-loop drift-free noncompliant SNR scalable encoder, but discover that its coding efficiency is poor. We then review the performance of an MPEG-compliant two-loop SNR scalable encoder. Finally, we propose a new two-loop noncompliant encoder which achieves improved coding performance at the expense of some increase in encoder and decoder complexity.
ISSN:1051-8215
1558-2205
DOI:10.1109/76.825862