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Voice Recognition Hardware Development Read My Lips John Porter, Lavanya Mynam, Gerald Mortensen

Voice Recognition Hardware Development Read My Lips John Porter, Lavanya Mynam, Gerald Mortensen. Problem Statement. Next generation keyboard architecture for voice recognition: - Identify microphone candidates - Direction Finding - Basic signal Conditioning - Optional wireless input

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Voice Recognition Hardware Development Read My Lips John Porter, Lavanya Mynam, Gerald Mortensen

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  1. Voice Recognition Hardware DevelopmentRead My LipsJohn Porter, Lavanya Mynam, Gerald Mortensen

  2. Problem Statement • Next generation keyboard architecture for voice recognition: - Identify microphone candidates - Direction Finding - Basic signal Conditioning - Optional wireless input - Performance testing protocol - Integrated keyboard packaging

  3. Project Learning: Microphones Condenser Microphones • Electret Microphones • Omni-directional microphones • Unidirectional microphones Specifications • Impedance (about 200 Ω or lower) • Frequency response ( 50 Hz to 16 kHz) • Dynamic range (softest to loudest sound) • Sensitivity (47 dB) • Cost • Size

  4. Project Learning: Detecting Direction • Theory • Subtracting signals to create a highly directional microphone.

  5. Project Learning: Placement Idea

  6. Project Learning: Signal Conditioning • Single unidirectional microphone Uni D Omni

  7. Microphone Direction Testing

  8. Project learning: Issues • Technical questions • Precision • Microphones locations • Toggle between text and software

  9. Project learning: Direction Finding • Multiple unidirectional microphones Uni D C C Uni D Uni D Omni Comparators “C” Differential Op Amp “D”

  10. Project learning: Wireless • Electrosonics

  11. Project learning: Via Voice • Platforms ( Windows Me/98/2000/XP ) • Capabilities • Converts speech to text • User adaptation • Understandability (accents) • Multiple users

  12. Testing Ideas • Methods • Lazy Susan • Waveform Comparisons • Speech to text translation • Metrics • Noise level • Noise source • Microphone orientation • Accuracy

  13. Project Management • Schedule • Mid project review: 4/12/2007 • Initial prototype: 4/25/2007 • Final Design Review: 5/3/2007

  14. Budget • Budget ( $4000 total ) • $50 Via Voice • $50 Poster • $300 USB audio device • $400 Two PCB Designs with setups • $200 Testing hardware • $750 Transportation • $500 Miscellaneous parts • $250 Miscellaneous tools • $500 Reserve • $1000 ECE Program Contribution

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