DifferentSamplingModels Quantization •Quantizationisdonetomakethesignalamplitudediscrete QuantizationSamplingMappingBinarySequence AnalogSignal DiscreteTimeCont.Ampl.Signal DiscreteTime&DiscreteAmplSignal LinearQuantization Llevels (L-1)q=2Vp=Vpp ForlargeLLq≈Vpp ...
UniformQuantization•Inspeechsignals,verylowspeechvolumespredominates–Only15%ofthetime,thevoltageexceedstheRMSvalue•Theselowlevelsignalsareunderrepresentedwithuniformquantization–Samenoisepower(q2/12)butlowsignalpower•TheanswerisnonuniformquantizationUniformNon-UniformNon-uniformQuantizationCompressthesignalfirstThen...
Analysis of Quantization Errors C/D T Quantizer Coder Quantizer Q[ ] Analysis of Quantization Errors The error sequence e(n) is a stationary random process. e(n) and x(n) are uncorrelated. The random variables of the error process are uncorrelated, i.e., the error is a white-noise proc...
1 Lecture1 SamplingofSignals by GrahamC.Goodwin UniversityofNewcastle Australia Lecture1 Presentedatthe“ZaborszkyDistinguishedLectureSeries” December3rd,4thand5th,2007 2 RecallBasicIdeaofSampling andQuantization Quantization Sampling t 1 t 3 t 2 t 4 t 0 1 2 3 4 5 6 3 Inthislecturewewillignore...
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Facial expression recognition by fusion of gabor texture features and local phase quantization. In Proceedings of the 12th International Conference on Signal Processing (ICSP), Hangzhou, China, 19–23 October 2014. 28. Isa, N.; Salamah, S.; Ngah, U. Adaptive fuzzy moving K-means clustering ...
The LS algorithm is affected by quantization error and white Gaussian noise. The simulation results verify the effectiveness of the proposed algorithm when the SNR of sub-ADC is from 30 dB to 100 dB or the ENOB of sub-ADC is from 5-bit to 16-bit. They show that the proposed algorithm ...