ece508-midterm-2011f

ece508-midterm-2011f - ECE508 Video Communications Mid-term...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE508 Video Communications Mid-term Exam (Fall 2011) Name: Student ID: This is a closed book, closed notes examination. You can use a calculator if needed. Write your solutions in the space provided next to the questions. Please show all your work. 1 20 2 20 3 20 4 20 5 20 Total 100
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. (20 points) Suppose we want to design an M -level uniform scalar quantizer for an input that is uniformly distributed in the interval  max max , X X . (a) (10 points) Derive an expression for the mean squared quantization error, ߪ . (b) (10 points) Derive an expression for the signal-to-noise ratio, ߪ , in dB. [Answer]
Background image of page 2
2. (20 points) A block diagram of transform coding is given below. Assume that Χ is an N - dimensional zero-mean stationary source and A is the transform matrix. Show that for unitary transforms the reconstruction error variance in transform coding equals that introduced by the set of coefficient quantizers.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

ece508-midterm-2011f - ECE508 Video Communications Mid-term...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online