A Low-Delay Audio Coder with Constrained-Entropy Quantization

We present a low-delay, constrained-entropy, backward adaptive, linear-predictive audio coder with low computational complexity. In contrast to most practical linear-predictive coders, the coder facilitates the exploitation of reverse waterfilling. The coder uses time-invariant quantization step siz...

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Bibliographic Details
Published in:2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics pp. 191 - 194
Main Authors: Li, Minyue, Kleijn, W. Bastiaan
Format: Conference Proceeding
Language:English
Published: IEEE 01.10.2007
Subjects:
Acoustic signal processing
Acoustics
Audio coding
Chlorine compounds
Computational complexity
Conferences
Delay effects
Delay estimation
Echo cancellers
Entropy
Hearing aids
Information technology
Informationsteknik
Predictive coding
Programming theory
Quantization
Signal processing
TECHNOLOGY
TEKNIKVETENSKAP
Transform coding
ISBN:9781424416189, 1424416183
ISSN:1931-1168
Online Access:Get full text
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Description
Summary:We present a low-delay, constrained-entropy, backward adaptive, linear-predictive audio coder with low computational complexity. In contrast to most practical linear-predictive coders, the coder facilitates the exploitation of reverse waterfilling. The coder uses time-invariant quantization step size and constrained-entropy coding, thus eliminating the convergence problems of backward adaptation near signal transitions. Yet rate variations are kept small by the usage of a mixture model density for the signal. The mixture model has the backward adapted model and a second model as components and the component probability is transmitted. Experimental results confirm the advantages of the coder structure and show that the coder provides good overall performance.
ISBN:9781424416189
1424416183
ISSN:1931-1168
DOI:10.1109/ASPAA.2007.4393029