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Performance evaluation of speech quantization:
Given an original speech segment "speech.dat" sampled at 8,000 Hz with each sample encoded in 16 bits, use Programs 2.3 to 2.5 and modify Program 2.2 to quantize the speech segment using 3 to 15 bits, respectively. The SNR in dB must be measured for each quantization. The MATLAB function: "sound(x/max (abs(x)),fs)" can be used to evaluate sound quality, where "x" is the speech segment while "fs" is the sampling rate of 8,000 Hz. In this project, create a plot of the measured SNR (dB) versus the number of bits and discuss the effect on the sound quality. For comparisons, plot the original speech and the quantized one using 3 bits, 8 bits, and 15 bits.
The propagating pulse passes an observer at x=0. The peak of the pulse can be approximated by a parabola, v(t)=20 (1 - 10t^2), where v is the mV and t is in ms. (a) find the current along at x=0, t=0 (b) find the membrane current per unit area at ..
For a modulating signal) x(t)= (t/T) a) Write an expression for the PM modulated signal. b) Write an expression for the FM modulated signal. c) What is the maximum phase deviation of the PM signal
an 8 pole synchronous motor produces a full load torque of 25 foot pounds, fed from a 60hz source and is now operating at 60% eff. What is the energy cost if the motor ran for a 8000 hrs/yr and the electrical energy cost were $.09/kWh.
Three identical inductors are connected in series to a 240v 1000hz line, and the circuit current is .6A What is the inductance of each inductor
What functions must the communications stations perform? Repeat for ring and star.
The signal x(t) consists of sum of two components, x1(t) and x2(t). The signal x(t) is bandlimited to 40 kHz, and it is sampled at a rate of 100 Khz to yield the sequence x(n). It is desired to suppress the signal x2(t) by passing the sequence x(n) t..
Design an Ag/AgCl electrode that will pass 150 mC of charge without removing all the AgCl. Calculate the mass of AgCl required. Show the electrode in the cross section and give the active area.
Using 3kohm resistors and ideal op amps, design a low-passunity-gain butterworth filter that has a cutoff frequency of 20 khz and is down at least 25 dB at 100 khz.
A parallel plate capacitor has gasoline as the dielectric. The area of the plate is 0.25 m^2 and the distance between two plates is 5cm. a. Find the capacitance given that the relative permittivity of gasoline is 2.
Discuss briefly the implications of these values of T1 for ultrasonic imaging. Repeat the calculations above with the angle of incidence of the ultrasound beam now being 60 degrees.
Current, voltage, and power to a three phase system are measured and found to be 20 A, 550 V and 10.5kW respectively. Determine equivalent circuits per phase as follows: (a)wye connected series combination of resistance and reactance in each phase.
In an n-channel MOSFET, thephenomenon that controls the quantity of electrons entering thechannel is: a. the Law of Conservation of Charge b. none of the above c. the attraction of electrons in the N+ material to thegated. the attraction of source el..
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