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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Vydáno v:	2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics s. 191 - 194
Hlavní autoři:	Li, Minyue, Kleijn, W. Bastiaan
Médium:	Konferenční příspěvek
Jazyk:	angličtina
Vydáno:	IEEE 01.10.2007
Témata:	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
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Popis
Shrnutí:	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