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Adaptive HLMs: The Next Generation of Language Modeling March 2008

vlingo corporation 17 dunster street cambridge , ma 02138 617-871-2987 www.vlingo.com. Adaptive HLMs: The Next Generation of Language Modeling March 2008. Vision. Unlocking access to mobile content with mobile Voice User Interface. Why Voice?.

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Adaptive HLMs: The Next Generation of Language Modeling March 2008

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  1. vlingo corporation 17 dunster street cambridge, ma 02138 617-871-2987 www.vlingo.com Adaptive HLMs: The Next Generation of Language ModelingMarch 2008

  2. Vision Unlocking access to mobile content with mobile Voice User Interface

  3. Why Voice? • Mobile Internet penetration held hostage by 12 keys • And even miniature full keyboards can be inconvenient/unsafe at times • Barriers: triple-tapping, discoverability • Less than ⅓ use mobile web browsers1 • Less than ¼ download applications2 • Barely half (54%) have bought ringtones, games, or other content • 85% of mobile TV users abandoned the service after just one viewing, underscoring the user interface difficulties facing mobile multimedia services3 • > 70% of subscribers who signed up for content bundles failed to actually consume any mobile content, indicating that usability, not price, was the culprit3 • Vlingo voice UI unlocks the promise of the Mobile Internet Statistics are US only Merrill Lynch, June 2007 Telephia bill & survey analysis of subscriber behavior during Q1 2007 Cellular News - Ease-of-use Outranks Price As Key Barrier to Mobile Data Usage, Feb 2008

  4. Why Now? • Increasing functionality in Mobile Devices • Communication: email, SMS/IM, voice • Entertainment: ringtones, music, video • Internet: search, maps and directions • Adoption limited by user interface • Devices and network limitations going away • 3G networks being deployed • Mass-market devices capable of audio and complex applications • Technology now capable • Speech recognition hardware costs lower • Network-based open-grammar ASR now possible

  5. The Challenge • Support consistent interface across applications • Music/content search • Business search • Addresses • Open web search • Messaging • Avoid application-specific effort • Ensure high success rates

  6. Characteristics of Mobile Devices • We know • user • Application • Application context • Consistent audio path • Display • Keypad/buttons

  7. Technology

  8. Adaptive HLMs • HLMs = Hierarchical Language Models • Based on Statistical Language Models • Efficiently scale to millions of words • General Web Search • Directory Assistance / Yellow pages / Local Search • Navigation Destination Entry • Messaging • Social networking • Adaptation • Per user • Across users

  9. Better User Interface—Allows for Adaptive Loop • Drop down list for possible mis-recognitions for easy corrections • Speak type over words to correct them • Freely mix talking and typing ASR Models Usage Data Recognize • Corrections captured to improve recognition for individual users and across users • Network effect– the more users the better the system, creating barrier to entry

  10. Industry Adoption • Transition to 3G data networks • Carriers expanding functionality of mainstream phones • Increasing consumer adoption of open devices • Early stages of advertising-based business models

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