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Look-Ahead Based Sigma-Delta Modulation

by Erwin Janssen
Save 35% Save 35%
Current price ₹10,915.00
Original price ₹16,792.00
Original price ₹16,792.00
Original price ₹16,792.00
(-35%)
₹10,915.00
Current price ₹10,915.00

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Book cover type: Paperback
  • ISBN13: 9789400735859
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Springer
  • Publisher Imprint: Springer
  • Publication Date:
  • Pages: 248
  • Original Price: EUR 149.99
  • Language: English
  • Edition: 2011
  • Item Weight: 397 grams
  • BISAC Subject(s): Electronics / Circuits / General, Networking / General, and Hardware / General

From the Back Cover
High resolution analog-to-digital conversion and digital-to-analog conversion is often realized with the use of a Sigma-Delta Modulator (SDM). The sigma-delta modulation process, although very non-linear when a 1-bit quantizer is used, is nowadays well understood and can be made to deliver a very high signal conversion quality. An example system that pushes the traditional sigma-delta modulation algorithm to its performance limit is the Super Audio CD (SA-CD) standard, in which a 64 times oversampled 1-bit signal is used to represent audio content with an SNR of up to 120 dB over 20 kHz bandwidth.

Look-Ahead Based Sigma-Delta Modulation presents a number of alternative digital sigma-delta modulation techniques that make use of look-ahead, a process that takes into account the effect of decisions on the future, to realize an even higher conversion quality than possible with traditional sigma-delta modulation.

This book provides the reader with a clear overview of various encoding techniques and demonstrates the improvements in signal conversion quality that can be obtained from their use. Starting from the basic full look-ahead approach that requires several orders of magnitude more computational power than a normal SDM, more efficient structures are derived that are able to realize a far higher signal conversion performance at a fraction of the computational cost. In addition to this, a modulator is derived that is able to generate bitstreams that are optimized for SA-CD usage, i.e. a high signal conversion quality combined with minimal signal entropy.

All the look-ahead algorithms presented in this book are described in pseudocode and ample simulation results are provided to judge the effects on the signal conversion performance.

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