ECE 220
Multimedia Signal Processing
October 24, 2006
Fall 2006
Homework 9
Assigned:
Tuesday, October 24, 2006
Due:
Wednesday, November 1, by 4:30 pm in the 220 lockbox on the 2nd floor
of Phillips.
Office hours:
See the web page for everyone’s office hours:
http://people.ece.cornell.edu/~hemami/ece220
Goals & concepts:
Quantization: operation, midriser vs. midtread, average quantization error,
connection between step size, numberofbits, and dynamic range. Simple
sampling of sinusoids.
Relevant text sections: (Quantization) Class notes. (Sampling) Sections 41.1; in 41.2 just look at
Figure 4.4; 41.3 keeping in mind that we actually know what the spectral
representation of a DT sinusoid is; 41.4, section 42 (NOT 42.4), Sections
44 and 45.
Helpful problems are from the CD, under “Homework Problems with Solutions” —
From Chapter 4 (Sampling and Aliasing).
“Sampled Sinusoid; OverSampled or UnderSampled”
“Sampling a Bandlimited Periodic Signal”
“Sampling Cosine Signals”
“Spectrum > Sinusoids; Period & Minimum Sampling Rate”
“D/C Reconstruction for Different Reconstruction Pulses”
“DiscreteTime Signal x[n] Derived from Sampling an Input Spectrum”
1.
Basic quantizer operation.
Consider a quantizer described in the following manner: the
quantizer is uniform, midtread, with a step size of 1.5 and provides center reconstruction.
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 Fall '05
 JOHNSON
 Digital Signal Processing, Signal Processing, sampling rate, step size, DT signal

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