Design Implemetation And Study Of A Code (DPC) Modulator And De-Modulator Using Matlab And Simulink
This thesis presents a detailed study of linear Pulse Code Modulation and also Differential Pulse Code Modulation using SIMULINK. Theoretical coding concepts are discussed extensively, each providing examples to accommodate better understanding of both PCM and DPCM concept. Non-linear PCM and...
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Format: | Monograph |
Language: | English |
Published: |
Universiti Sains Malaysia
2005
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Subjects: | |
Online Access: | http://eprints.usm.my/57608/1/Design%20Implemetation%20And%20Study%20Of%20A%20Code%20%28DPC%29%20Modulator%20And%20De-Modulator%20Using%20Matlab%20And%20Simulink_Nitiabalan%20Karuppayah.pdf http://eprints.usm.my/57608/ |
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Summary: | This thesis presents a detailed study of linear Pulse Code Modulation and also
Differential Pulse Code Modulation using SIMULINK. Theoretical coding concepts are
discussed extensively, each providing examples to accommodate better understanding of
both PCM and DPCM concept. Non-linear PCM and DPCM cases are not discussed in
this thesis. Basic introduction for the proposed systems are explained together with
introduction to SIMULINK program. A step-by-step explanation of each stage is
provided, along with accompanying visual parameter fields in the APPENDIX section.
Two types of test input signals are given to both constructed models; namely, a sine wave
of 100 radians/second and a simple ramp function. Each stage of the blocks operations
are studied in detail and the outputs are presented in graphical waveforms. Signal-to-Quantization Noise ratio is calculated for each system and compared. Arising problems,
such as the need of amplitude equalization, during the implementation of these circuits
are also mentioned, along with steps to overcome the mentioned irregularities and
redundant results. Two types of tests can be done to reach the final conclusion; the first,
an objective test, where SNR are calculated and graphical results are produced. The
second test is a subjective test, where Mean Opinion Score (MOS) is obtained to verify
whether the speech coding encoded is discernable to a human ear and determining the
quality of the output. Differences between PCM and DPCM are stated based on the
results obtained from the simulation of both systems; namely, in terms of bandwidth
requirements, quantization noise, coding, simplicity of the implemented circuit, and also
the quality of the output obtained. |
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