Google search by voice Daniel Bocho k (bochod1@fel.cvut.cz) - PowerPoint PPT Presentation

IBM - CVUT Student Research Projects Google search by voice Daniel Bocho ř ák (bochod1@fel.cvut.cz)

Introduction • Google search by voice on Smartphone, PDA, … • Speech recognizer: – recognize one word(for example: hilton) – not so difficult – recognize the words in sentence (for example: hilton hotels) - difficult! • Target: – to improve the recognization of words in sentence (create data model ) – use Google suggest IBM - CVUT Student Research Projects 2

Google suggest • For an input word returns the most frequently searched sentences and the number of searching • Remote Procedure Call (RPC) could be used • http://labs.google.com/suggest • For example.: – input: hilton – output: sentence number of searching hilton hotels 16.700.000 results hilton honors 1.030.000 results hilton hotel 33.200.000 results IBM - CVUT Student Research Projects 3

Data model • Word (input), successors (Google suggest output) • Probability of jump to successor a – sucessor, number of searching p = - log (a / b ) b – input word, number of searching • For example: – input: hilton – output sentence probability hilton hotels 0.744363 p = -log (16.700.000 / 92.700.000) = 0.744363 IBM - CVUT Student Research Projects 4

Data model • Input: Database of words • Find the successors and their probability • Creation of data model for speech recognizer => better prediction of words in sentences IBM - CVUT Student Research Projects 5