Smartpen Components
2007 © Livescribe, Inc., Confidential
Binaural Recording
– Binaural is to the ears what binocular is to the
eyes
– – Stereo recording, but better
– – The highest fidelity recording system available
• Far field recording challenge
– – Binaural summation produces a 10dB boost…which is the perceptual
equivalent of asking someone to speak up
• Benefits of spatial audio
– – 3-dimensional sound produces a strong sense of presence
– – Allows the listener to distinguish voices based on location and to selectively
tune out unwanted sounds
– – Note: binaural microphones are required to record spatial audio, but any
earphones can play the 3D recordings back
2007 © Livescribe, Inc., Confidential
Dot Positioning System
• Two-Dimensional Barcode
– Camera in pen tip reads 6 x 6 dot region
– Each dot can have 1 of 4 positions
– 4^36 = 4.72 x 10^21
– Practically speaking, that’s > 7 trillion unique notebook
pages
2007 © Livescribe, Inc., Confidential