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

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4 Author(s)
Rodbro, C.A. ; Dept. of Commun. Technol., Aalborg Univ., Denmark ; Christensen, M.G. ; Norden, F. ; Jensen, S.H.

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.

Published in:

Applications of Signal Processing to Audio and Acoustics, 2005. IEEE Workshop on

Date of Conference:

16-19 Oct. 2005