1. Digital Sound Projection ECE 477 Group 6 Patent Liability Steve Anderson Mike Goldfarb Shao-Fu Shih Josh Smith

2. Product #1: Shure Wireless Microphone Systems Mic/Line input to transmitter Wireless Transmission over ~700 MHz User selects frequency using UI Receiver outputs to speakers

3. Product #1: Possible Infringement Same overall function – transmit audio wirelessly to receiver and output to speakers Different wireless scheme UI more involved on DSP using signal processor No infringement  No action necessary

4. Product #2: Technical-Pro RX-B32 Audio Receiver Some user input to adjust audio signal Mic Input also with 2 channel stereo input FM/AM radio tuner LCD shows pretty bars

5. Product #2: Possible Infringement Audio Signal input to receiver – User changes effects to fit preference Significantly different UI options than DSP Volume adjustment available on transmitter Meant for high quality Accepts a wireless audio (FM/AM) – DSP designed to accept only the signal from matching transmitter Significant differences  No action needed

6. Patent 7,680,465 – Sound enhancement for audio devices based on user-specific audio processing parameters Filed - July 31, 2006 Important Claims: – A method comprising: providing a manual control to receive a user input selection of one or more user- specific audio processing parameters (using digital signal processor) relating to a hearing preference of the user adjusting a gain in one or more frequency bands – receiving an RF signal from a first wireless device; demodulating the received RF signal to obtain an audio signal

7. Patent 7,680,465 – Possible Infringement Everything described in the patent is implemented in our design Patent info is very broad and general – Would need more detailed info in order to figure out if anything is really infringed Software / hardware Most of the claims could be considered “obvious” – If DSP infringed on this patent, then probably would have to pay to use