2. Introduction to Signal Processing (The mathematical side of EE) Prof. Mari Ostendorf

3. Context: The New Revolution Dramatic increase in computing power  From mainframes to laptops to PDA/cell phones Exponential growth of the internet  1983: 200 computers on the internet  1996: 10-15 million computers on the internet  90’s: commercial web browsers appeared Exponential growth in wireless technology  Cell phone market growing far faster than landlines  Wifi on campus, at home, in coffee shops, …  Bluetooth

4. Context: Undergraduate Life 1976:  no personal computers (terminal access to main computer)  no internet, no browsers, searching is in the library stacks  no email, no wireless phones, no fax  music from record players, movies in theatres 2008:  wireless computing all over campus, accessing libraries electronically, electronic office hours  cell phones, texting, iPods, TiVo, kindle, … We can be sure of drastic changes in the next 20-30 years!

5. Music Evolution Analog to Digital Records and turntables CDs MP3, music over the internet Home to Portable Cassette tapes, Sony Walkman Sony Discman iPods Entertainment evolution more generally: move to digital images, videos, TV, … interactive media

6. Causes of the Revolution Hardware: Invention of the transistor & Moore’s law Signal processing:  Shannon’s sampling theorem  Leveraging imperfect human perception

7. Goals of this Lab Learn basic concept of representing signals in terms of frequency content Explore sound synthesis & recognition Learn how to be a special effects creator

8. Which spectrogram goes with which sound? flute tweetwoohoo hahaha

9. A Little Advertising Fall 2008  EE Halloween Design Contest Winter 2009  EE135: The Digital World of Multimedia Ask me more after you learn more….