1. Web Radio Stereo Component

2. To Jog Your Memory.. 4 High speed access is become more common in homes and the market for Hi-Fi audio has always existed. Our project takes streaming audio via the Internet and makes it available as a stereo component.

3. Our Project... Traditionally people have listened to the radio over and RF frequency. With our implementation, people will be able to listen to their favorite radio station no matter where they are in the world.

4. Accomplishments So Far... 4 LCD Interface –The interface from the parallel port of the ColdFire board to the LCD is complete 4 Setting up Metrowerks 4 Wired a Voltage Converter –We needed from 3.3V to 5V for the ColdFire evaluation board

5. More Accomplishments… 4 MPEG/Layer 3 Decoding –Once we eliminated RealAudio as a decoding option, we turned to MPEG/Layer 3 which has a lot of documentation available

6. How Does MPEG/Layer 3 work? 4 Without data reduction, digital audio signals consist of 16 bit samples recorded at a sampling rate more than twice the actual audio bandwidth (e.g. 44.1 kHz for Compact Disks). So you end up with more than 1.400 Mbit to represent just one second of stereo music in CD quality. 4 By using MPEG audio coding, you can shrink down the original sound data from a CD by a factor of 12, without losing sound quality.

7. How Does MPEG/Layer 3 work?  Basically, this is realized by perceptual coding techniques addressing the perception of sound waves by the human ear. 4 When you look at the sun and a bird passes in front, you don’t see it because of brightness of the sun. In audio, strong sounds overshadow the weaker sounds so they don’t need to be coded.

8. So How Are We Using It? 4 International Standards Organization (ISO) –ISO has released public C code to perform the MPEG/Layer 3 decoding process for Solaris. We are adding functionality to this code so that it may be used by the ColdFire board and our Digital-to-Audio converter to deliver line-out

9. Flowchart of Decoding Process TCP/IP streaming MPEG/Layer 3 audio While a bitstream != NULL Read MPEG/Layer 3 Header Decode Audio Stream Create at Least 3 Frame Buffers Output to Parallel Port of ColdFire 5307 so that Digital-to-Audio conversion process can start

10. Original Schedule...

11. Updated Schedule...

12. Mid-term Summary 4 Level of Difficulty in implementation –2 4 Coordination Among Team Members –1 4 Support From the Lab –2

13. References... 4 Introduction to TCP/IP – –gopher://gopher- chem.ucdavis.edu/11/Index/Internet_aw/Intro_t he_Internet/intro.to.ip/gopher://gopher- chem.ucdavis.edu/11/Index/Internet_aw/Intro_t he_Internet/intro.to.ip/ 4 MPEG/Layer 3 Information –http://www.mp3tech.org 4 Motorola – –http://www.motorola.com

14. References... 4 483 Home Page – –http://www.cs.tamu.edu/course- info/cpsc483/common/ 4 Analog Devices – – http://www.analogdevices.com