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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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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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creator	Arnold, J.F. Fracter, M.R. Yaqiang Wang
description	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.
doi_str_mv	10.1109/76.825862
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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
title	Efficient drift-free signal-to-noise ratio scalability
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