From kozick@charcoal.eg.bucknell.edu Wed Apr 1 10:44 EST 1998 Date: Wed, 1 Apr 1998 10:44:32 -0500 From: Kozick Rich To: tilton@bucknell.edu, movesian@bucknell.edu, tapal@bucknell.edu, freeston@bucknell.edu, zkulis@bucknell.edu, bbeaver@bucknell.edu, paullo@bucknell.edu, boothby@bucknell.edu, pankake@bucknell.edu, jegreene@bucknell.edu, vary@bucknell.edu, ganiear@bucknell.edu, zorn@bucknell.edu, marraro@bucknell.edu, sgordon@bucknell.edu, dkline@bucknell.edu, jaranck@bucknell.edu, lwil@bucknell.edu, jcarey@bucknell.edu, campbell@bucknell.edu, ligong@bucknell.edu, suqi@bucknell.edu, yuesun@bucknell.edu, fhaosng@bucknell.edu, rejmer@bucknell.edu, tassone@bucknell.edu, kozick@bucknell.edu Subject: Some notes Hi, I have posted the solutions to today's test outside my office. For Friday, please run the quanization demonstration at http://www.eg.bucknell.edu/~kozick/elec470/notes.html I have updated it today so that you can hear the effects of the quantization without running MATLAB, so you should be able to do it from any computer. In this demo, R bits corresponds to L = 2^R + 1 levels, rather than L = 2^R levels as we considered in class. You may be surprised that the voice is intelligible even with only R = 1 bit or L = 3 levels! However, the "quality of service" is not what we expect from a voice communication system. (It might, however, sound similar to communication from astronauts on the moon to earth in the 60's and 70's?) For Friday, please finish reading Chapter 6. You might also begin Chapter 7, Sections 7.1, 7.2, and 7.4. We will most likely start Chapter 7 next week. Thanks. Rich Kozick