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Introduction

  • Erwin Janssen
  • Arthur van Roermund
Part of the Analog Circuits and Signal Processing book series (ACSP)

In March 1999 the Super Audio Compact Disc (Super Audio CD, SA-CD), the successor of the normal audio CD, was presented to the world. This new audio carrier, conceived by Philips and Sony, makes use of a radically new way to store and reproduce audio signals. Instead of working with the traditional 44.1 kHz sampling rate and 16-bit pulse-code modulated (PCM) signals, a 2.8 MHz 1-bit format is used to store the audio signal. The new format is marketed to deliver a signal-to-noise ratio (SNR) of 120 dB and a signal bandwidth of 90 kHz, as opposed to an SNR of 96 dB and a bandwidth of 20 kHz for the normal audio CD. The decision for this alternate encoding format was made years earlier, when 1-bit Analog-to-Digital (AD) audio Sigma-Delta (SD) converters were still delivering the highest signal conversion quality. In fact, virtually all of the high quality AD and Digital-to-Analog (DA) converters that were used at that time for the generation and reproduction of CD quality PCM audio were...

Keywords

Audio Signal Modulation Algorithm Compression Gain Pruning Criterion High Audio Quality 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Mixed Signal Circuits & SystemsNXP Semiconductors, Central R&DEindhovenThe Netherlands
  2. 2.Electrical Engineering, Mixed-signal Microelectronics GroupTechnical University EindhovenEindhovenThe Netherlands

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