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Adaptive  DeltaModulationfor Speech  Signal K Sai Malleswar               By:                 Kshitiz Sinha               ...
Topics and Steps1   • Sampling2   • Quantization3   • Delta modulation4   • Adaptive delta modulation5   • Demodulation6  ...
Topics and Steps• Sampling:  sampling theorem• Quantization:  types of Quantization
Topics and Steps• Delta Modulation• Errors in Delta   modulation
Topics and StepsAdaptiveness• Increasing or decreasing the step size according to the  error ………
The system                      Adaptive delta             DemodulationSignal acquisition                       modulation...
Signal acquisition• The real time signal is recorded using  “Wavrecord” command.  y = wavrecord(n,Fs,dtype)
Adaptive delta modulationCalculating maximum                         Calculating error and     Transmitting data usingvari...
Adaptive delta modulationCalculating maximum                         Calculating error and     Transmitting data usingvari...
Adaptive delta modulationCalculating maximum                         Calculating error and     Transmitting data usingvari...
Demodulation                           ReconstructingReceiving and decoding                         (demodulating) the   S...
Demodulation                           ReconstructingReceiving and decoding                         (demodulating) the   S...
Demodulation                           ReconstructingReceiving and decoding                         (demodulating) the   S...
Performance parameters• When the sampling frequency is „22000  Hz‟ then the required band width is “42.97  Kbits/sec”.• Th...
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Adaptive delta modulation of Speech signal

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Simple demo of adm of speech signal using matlab progrmming

Published in: Technology, Business

Adaptive delta modulation of Speech signal

  1. 1. Adaptive DeltaModulationfor Speech Signal K Sai Malleswar By: Kshitiz Sinha Kumar Harshit L. Deepak
  2. 2. Topics and Steps1 • Sampling2 • Quantization3 • Delta modulation4 • Adaptive delta modulation5 • Demodulation6 • Conclusion
  3. 3. Topics and Steps• Sampling: sampling theorem• Quantization: types of Quantization
  4. 4. Topics and Steps• Delta Modulation• Errors in Delta modulation
  5. 5. Topics and StepsAdaptiveness• Increasing or decreasing the step size according to the error ………
  6. 6. The system Adaptive delta DemodulationSignal acquisition modulation Calculating maximum Recording speech Receiving and decoding variation in message using Wavrecord the data signal and step size Calculating error and Reconstructing plotting the adapting step size delta (demodulating) the sampled signal signal Transmitting data using DAT files in binary form Signal conditioning
  7. 7. Signal acquisition• The real time signal is recorded using “Wavrecord” command. y = wavrecord(n,Fs,dtype)
  8. 8. Adaptive delta modulationCalculating maximum Calculating error and Transmitting data usingvariation in message adapting step size delta DAT files in binary form signal and step size Choosing step size as .0001*max
  9. 9. Adaptive delta modulationCalculating maximum Calculating error and Transmitting data usingvariation in message adapting step size delta DAT files in binary form signal and step size Adjusting delta value
  10. 10. Adaptive delta modulationCalculating maximum Calculating error and Transmitting data usingvariation in message adapting step size delta DAT files in binary form signal and step size
  11. 11. Demodulation ReconstructingReceiving and decoding (demodulating) the Signal conditioning the data signal
  12. 12. Demodulation ReconstructingReceiving and decoding (demodulating) the Signal conditioning the data signal
  13. 13. Demodulation ReconstructingReceiving and decoding (demodulating) the Signal conditioning the data signal Can use this step depending on the noise present.
  14. 14. Performance parameters• When the sampling frequency is „22000 Hz‟ then the required band width is “42.97 Kbits/sec”.• The compression ratio obtained is 8.

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