Look-Ahead Based Sigma-Delta Modulation [electronic resource] / by Erwin Janssen, Arthur van Roermund.

By: Janssen, Erwin [author.]Contributor(s): van Roermund, Arthur [author.] | SpringerLink (Online service)Material type: TextTextLanguage: English Series: Analog Circuits and Signal Processing: Publisher: Dordrecht : Springer Netherlands, 2011Description: XII, 248 p. online resourceContent type: text Media type: computer Carrier type: online resourceISBN: 9789400713871Subject(s): Engineering | Computer network architectures | Systems engineering | Engineering | Circuits and Systems | Computer Systems Organization and Communication NetworksAdditional physical formats: Printed edition:: No titleDDC classification: 621.3815 LOC classification: TK7888.4Online resources: Click here to access online
Contents:
1. Introduction -- 2. Basics of sigma-delta modulation -- 3. Transient SDM performance -- 4. Noise-shaping quantizer model -- 5. Look-ahead sigma-delta modulation -- 6. Reducing the complexity of LA DD conversion -- 7. Trellis sigma-delta modulation -- 8. Efficient Trellis sigma-delta modulation -- 9. Pruned Tree sigma-delta modulation -- 10. Pruned Tree sigma-delta modulation for SA-CD -- 11. Comparison of look-ahead SDM techniques -- 12. Maximum SNR analysis -- 13. General Conclusions -- Appendix A: FFT calculations - coherent and power averaging -- Appendix B: Descriptions of the used Sigma-Delta Modulators.
In: Springer eBooksSummary: 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.
Tags from this library: No tags from this library for this title. Log in to add tags.
    Average rating: 0.0 (0 votes)
No physical items for this record

1. Introduction -- 2. Basics of sigma-delta modulation -- 3. Transient SDM performance -- 4. Noise-shaping quantizer model -- 5. Look-ahead sigma-delta modulation -- 6. Reducing the complexity of LA DD conversion -- 7. Trellis sigma-delta modulation -- 8. Efficient Trellis sigma-delta modulation -- 9. Pruned Tree sigma-delta modulation -- 10. Pruned Tree sigma-delta modulation for SA-CD -- 11. Comparison of look-ahead SDM techniques -- 12. Maximum SNR analysis -- 13. General Conclusions -- Appendix A: FFT calculations - coherent and power averaging -- Appendix B: Descriptions of the used Sigma-Delta Modulators.

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.

There are no comments on this title.

to post a comment.

Implemented and Maintained by Biju Patnaik Central Library.
For any Suggestions/Query Contact to library or Email: library@nitrkl.ac.in OR bpcl-cir@nitrkl.ac.in. Ph:91+6612462103
Website/OPAC best viewed in Mozilla Browser in 1366X768 Resolution.

Powered by Koha