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Acknowledgments<br />

The author thanks Dr. Steve Walsh, Dr. Dave Strube, Dr. Sergei Larin, and Carl Lewis for their comments<br />

in preparing this paper. The author also thanks the BOPS, Inc. development team for their drive,<br />

excitement, and creative technical skills in developing the ManArray processor, tools, and their supporting<br />

functions, as well as for making BOPS, Inc. a fun place to work.<br />

Trademark Information<br />

BOPS and ManArray are registered trademarks of BOPS, Inc. Manta, MoCARay, MICoRay, Jordan, Travis,<br />

Xemulator, and Halo are trademarks of BOPS, Inc. All other brands or product names are the property<br />

of their respective holders.<br />

References<br />

1. The Design and Implementation of Signal-Processing Systems Technical Committee, edited by Jan<br />

M. Rabaey, with contributions from W. Gass, R. Brodersen, and T. Nishitani, “VLSI design and<br />

implementation fuels the signal-processing revolution,” IEEE Signal Processing Magazine, pp. 22–37,<br />

Jan., 1998.<br />

2. Alan Gatherer, Trudy Stetzler, Mike McMahan, and Edgar Auslander, “DSP-based architectures for<br />

mobile communications: past, present, and future,” IEEE Communications Magazine, pp. 84–90, Jan.,<br />

2000.<br />

3. Krishna Yarlagadda, “The expanding world of DSPs,” Computer Design, pp. 77–89, March, 1998.<br />

4. Ichiro Kuroda and Takao Nishitani, “Multimedia processors,” Proceedings of the IEEE, Vol. 86, No. 6,<br />

pp. 1203–1227, June, 1998.<br />

5. Bruce Schulman and Gerald G. Pechanek, “A 90k gate “CLB” for Parallel Distributed Computing,”<br />

in Proceedings of EHPC. IPDPS Workshops 2000, pp. 831–838.<br />

6. Nikos P. Pitsianis and Gerald G. Pechanek, “High-performance FFT implementation on the BOPS<br />

ManArray parallel DSP,” Advanced Signal Processing Algorithms, Architectures and Implementations<br />

IX, Volume 3807, pp. 164–171, SPIE International Symposium, Denver, CO, USA, July, 1999.<br />

7. Gerald G. Pechanek, Stamatis Vassiliadis, and Nikos P. Pitsianis, “ManArray interconnection network:<br />

an introduction,” in Proceedings of EuroPar ’99 Parallel Processing, Lecture Notes in Computer Science,<br />

Vol. 1685, pp. 761–765, Toulouse, France, Aug. 31–Sept. 3, 1999.<br />

8. Gerald G. Pechanek and Stamatis Vassiliadis, “The ManArray embedded processor architecture,” in<br />

Proceedings of the 26th Euromicro Conference: “Informatics: inventing the future,” Maastricht, The<br />

Netherlands, September 5–7, 2000, Vol. I, pp. 348–355.<br />

9. BOPS, Inc. corporate Web site (www.bops.com).<br />

10. David Baker, “BOPS DSPs as co-processors,” BOPS Internal Technical Report, April 4, 2001.<br />

11. Gerald G. Pechanek, Charles Kurak, and Bruce Schulman, “Design of MPEG-2 function with embedded<br />

ManArray cores,” in Proceedings of DesignCon 2000, Jan. 31–Feb. 3, 2000.<br />

39.3 Digital Audio Processors for Personal Computer Systems<br />

Thomas C. Savell<br />

Introduction<br />

The audio subsystem of the personal computer (PC), once an almost unnecessary component, has become<br />

an integral part of the operating systems and applications software that run on them. The evolution of<br />

the PC itself has led to a complex audio system; requiring simultaneous playback and recording while<br />

applying advanced signal processing. The best PC audio systems employ one or more specialized digital<br />

audio processors to offload the main processor and guarantee artifact-free audio.<br />

© 2002 by CRC Press LLC

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