Improvement of Audio Capture in Handheld Devices

through Digital FilteringGroup Members: Sam Marlin, Jonathan

BrownFaculty Adviser: Tom Miller

BackgroundSpeech Recognition

Widely Used40 years in the making

AbstractVoice control in phones is unreliable

Compare captured audio from handheld microphone to more ideal microphone

Apply digital filter from this comparison

Deliver test procedure, capture hardware and analysis application

Problem DefinitionQuality of Audio Capture

Makes voice recognition unreliable

Proposed SolutionDigital FilteringProcess

Record same audio on two devicesCompare recordingsApply filter to handheld

Handheld to be usedMotorola MC5574Desktop Computer

ObjectivesI. Software for Desktop and HandheldII. Determine optimal test audio signalIII. Analyze audio streamIV. Create filterV. Integrate Filter into Handheld

Testing Setup

Proposed Schedule

Questions?