Dr. Michael McGuire - Supervisor

1. 3-D Audio Spatialization Effects for Nokia Mobile Devices Ryan Fehr Electrical Engineering rfehr@engr.uvic.ca Lucas O’Neil Electrical Engineering loneil@engr.uvic.ca Brendan Cassidy Computer Engineering cassidyb@engr.uvic.ca Kevin Pearson Electrical Engineering kpearson@engr.uvic.ca Audio Effects Market Applications System Overview The use of mobile devices as personal media players has become increasingly prominent. Cell phones are now being used as portable audio and video players, eliminating the need for separate devices (i.e. a cell phone and an mp3 player). As cell phones' media capabilities are becoming more important in their marketability, the overall enjoyability of the mobile listening experience should be optimized. This project involved rendering binaural audio from a stereo input by reproducing the effects of a head-related transfer functions (HTRF) for the placement of multiple source location. The Nokia N80 is a apart of the Nokia XpressMusic brand, and has the ability to sync and transfer music to and from a PC. The phone also has the ability to share multimedia between users. Simulated Stereo Loudspeaker EffectBlock Diagram Representation Nokia N80 Smartphone The resulting binaural audio would have the effect of externalizing the stereo source locations to two “loudspeakers” behind the listener. The N80 supports UPnP, Universal Plug and Play, which is an architecture for pervasive peer-to-peer network connectivity of PCs and intelligent devices. UPnP builds on Internet standards and allows the N80 to stream music to and from other devices. N80 phone demonstrating the ability to stream multimedia Symbian S60 OS Simulated Stereo Loudspeaker Effect Future Developments By upmixing stereo audio to surround sound and applying the HRTF to each channel, simulated surround sound with headphones can be achieved. Such an effect has applications with the increasing use of mobile devices as personal media players, especially for video applications. A frequency-domain based implementation of our project would decrease execution time, opening doors to possible real-time output streaming (buffering). Such improvements would also allow the modelling of more external sources, such as a 5.1 surround sound effect. An intuitive GUI would also benefit the project. The N80 is built upon the Symbian S60 operating system, making the phone more like small personal computer than a conventional mobile phone. S60 handles basic phone functionality as well as advanced applications. Just as importantly, it provides the intuitive, full-color user interface that's both simple and good-looking. It also allows simultaneous of several applications. Acknowledgements Dr. Michael McGuire - Supervisor Simulated 5.1 Surround Block Diagram