Adaptive delta modulation of Speech signal

6,581 views
6,334 views

Published on

Simple demo of adm of speech signal using matlab progrmming

Published in: Technology, Business
2 Comments
7 Likes
Statistics
Notes
No Downloads
Views
Total views
6,581
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
1
Comments
2
Likes
7
Embeds 0
No embeds

No notes for slide

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.

×