Low complexity rate-distortion optimized time-segmentation for audio coding

In this paper, we investigate a reduced complexity approach to rate-distortion optimized time-segmentation in audio coding. Instead of the conventional closed-loop approach for determining the coding distortions, they are estimated from a set of features extracted from the audio signal. Care is take...

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Hauptverfasser:	Rodbro, C.A., Christensen, M.G., Norden, F., Jensen, S.H.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Acoustic distortion Audio coding Communications technology Constraint optimization Distortion measurement Encoding Feature extraction Portable media players Rate-distortion Signal representations
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creator	Rodbro, C.A. Christensen, M.G. Norden, F. Jensen, S.H.
description	In this paper, we investigate a reduced complexity approach to rate-distortion optimized time-segmentation in audio coding. Instead of the conventional closed-loop approach for determining the coding distortions, they are estimated from a set of features extracted from the audio signal. Care is taken to ensure that properties such as convex and non-increasing rate-distortion curves carry over from the training data to the estimated rate-distortion pairs. With computational complexity reductions of a factor close to 10, perceptual listening tests reveal a slight reduction of the signal quality, while maintaining a large improvement over fixed segmentation.
doi_str_mv	10.1109/ASPAA.2005.1540212
format	Conference Proceeding
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Acoustic distortion Audio coding Communications technology Constraint optimization Distortion measurement Encoding Feature extraction Portable media players Rate-distortion Signal representations
title	Low complexity rate-distortion optimized time-segmentation for audio coding
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