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2011 | OriginalPaper | Chapter

10. Pruned Tree Sigma-Delta Modulation for SA-CD

Authors : Erwin Janssen, Arthur van Roermund

Published in: Look-Ahead Based Sigma-Delta Modulation

Publisher: Springer Netherlands

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Abstract

In chapter ten, the Pruned Tree sigma-delta modulation algorithm for Super Audio CD (SA-CD) is presented. The algorithm has a better compatibility with Super Audio CD, because it generates bitstreams that result in a high lossless data compression gain. This is achieved by adding a cost function to the look-ahead filter that measures the predictability of the output signal. This addition results in an output bitstream that is of a high signal quality, but that is also very predictable, such that the amount of required disc storage space after lossless data compression reduces. This reduction of the required storage space is of great importance, since it solves potential playback duration issues. The addition of the prediction cost function has only a minimal impact on the SNR, while the distortion and the noise-modulation performance of the converter are strongly reduced, resulting in the ideal sigma-delta converter for high-end audio applications.

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previous chapter Pruned Tree Sigma-Delta Modulation
next chapter Comparison of Look-Ahead SDM Techniques
Footnotes
1
A sine wave with a peak amplitude of 50% of the theoretical maximum has a level of 0 dB SACD, see annex D.2 of the Scarlet book. Normalized to a feed-back value of ±1.0 this reflects to an amplitude of 0.5.
 
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Metadata
Title
Pruned Tree Sigma-Delta Modulation for SA-CD
Authors
Erwin Janssen
Arthur van Roermund
Copyright Year
2011
Publisher
Springer Netherlands
Book
Look-Ahead Based Sigma-Delta Modulation

Print ISBN: 978-94-007-1386-4

Electronic ISBN: 978-94-007-1387-1

Copyright Year: 2011

DOI
https://doi.org/10.1007/978-94-007-1387-1_10