1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter Twelve Digitization Techniques for Analog Messages and Networks

2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) PCM generation system (b) quantization characteristic Figure 12.1-1

3. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) PCM receiver (b) reconstructed waveform Figure 12.1-2

4. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Noise performance of PCM Figure 12.2-1

5. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Performance comparison of PCM and analog modulation Figure 12.2-2

6. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Accumulator for delta modulation Figure 12.3-1

7. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. DM transmittere Figure 12.3-2

8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. DM waveforms Figure 12.3-3

9. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) DM receiver (b) granular noise waveform Figure 12.3-4

10. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) DM system (b) DSM system Figure 12.3-6

11. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) Adaptive DM transmitter (b) waveforms Figure 12.3-7

12. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Optical readout for CD Figure 12.4-1

13. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CD NRZI signal corresponding to programmed bits Figure 12.4-2

14. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CD audio recording system Figure 12.4-3

15. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CD audio playback Figure 12.4-4

16. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Multiplexing hierarchy for digital telecommunications Figure 12.5-1

17. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Illustrative configuration of the AT&T hierarchy Figure 12.5-2

18. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ADSL telephone twisted pair interface Figure 12.5-4

19. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Spectrum of an ADSL signal Figure 12.5-5

20. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. SONET system Figure 12.5-6

21. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Path terminating element Figure 12.5-7

22. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. STS-1 SONET frame, 9 rows x 90 bytes/row Figure 12.5-8

23. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. OSI architecture Figure 12.6-2

24. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. TCP/IP architecture Figure 12.6-3