Read My Lips Voice Recognition Hardware Development

Voice Input Element Requirements –Low cost microphones –Integrated into existing AIS panels –Removes noise created by panels –Improved performance over off the shelf competitors

Design Concept Signal Subtraction to create a highly directional microphone. Omni DirectionalUni-DirectionalResult

Selected Hardware Panasonic Microphones –Omni Directional WM-64PN –Unidirectional WM-55A103 Op Amp –TL082 Low Noise Operational Amplifier

Detailed Schematic

Testing Tune Microphones –Balance omni and uni directional microphones Waveform Analysis –Acquire waveforms to confirm cancellation Translation Analysis –Confirm speech to text translation accuracy Unit Placement –Upper and lower mounting options

Testing - Tuning Microphones must be balanced –Completed by adjusting resistance values

Testing - Waveforms Confirmation of cancellation

Testing - Translation Translation of a predefined script

Testing - Translation Translation accuracy in various scenarios

Testing - Translation Our solution vs. competitor

Testing - Mounting Performance will vary depending on mounting locations Top center of panel was chosen as best location

Future Work High Frequency Analysis –Better cancellation at higher frequencies Power Regulation –Stabilization of DC power supply Increased Directionality –For improved performance Phase analysis –Both within the circuit and the sounds arrival