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Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
Jan Linden
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Jan Linden

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  • 1.  
  • 2. Non-Obvious Challenges and Opportunities for VoIP and Video on the iPhone <ul><li>Jan Linden, Global IP Solutions </li></ul>
  • 3. Introduction <ul><li>Global IP Solutions (GIPS) </li></ul><ul><ul><li>Founded 1999 </li></ul></ul><ul><ul><li>Recognized leader in world class voice and video processing technology for IP networks </li></ul></ul><ul><ul><li>GIPS s/w is deployed in over 800 million end-points </li></ul></ul><ul><ul><li>Enables developers to offer the highest quality regardless of network conditions and device </li></ul></ul><ul><li>Jan Linden </li></ul><ul><ul><li>Vice President Engineering – GIPS </li></ul></ul><ul><ul><li>R&D in speech and video Processing for more than 15 years </li></ul></ul>
  • 4. Mobile Market Trends <ul><li>Fixed Mobile Convergence </li></ul><ul><ul><li>Unified communications </li></ul></ul><ul><li>Migration from legacy cellular to next-gen networks </li></ul><ul><ul><li>Allows for faster data connection </li></ul></ul><ul><li>Growth of Smartphone adoption </li></ul><ul><ul><li>iPhone big part of growth, especially in consumer space </li></ul></ul><ul><li>Increased accessibility and affordability </li></ul><ul><ul><li>Attractive data pricing models </li></ul></ul><ul><ul><li>Handset prices declining </li></ul></ul><ul><li>No ideal mobile VoIP platform exists yet </li></ul><ul><li>Development of 3 rd Party Applications </li></ul><ul><ul><li>VoIP over mobile in high demand </li></ul></ul>
  • 5. Mobile VoIP Design Considerations Coping with network degradation Power Consumption – Battery life Hardware issues (Processor, OS, acoustics, etc.) Echo cancellation Additional voice processing Environment – Background Noise, speaker phone mode Speech codec VoIP Design Challenges Network Codec Hardware Echo Power Voice Environment
  • 6. The iPhone as a VoIP Platform <ul><li>iPhone one of the most VoIP friendly phones on the market… </li></ul><ul><ul><li>Open APIs for easy development </li></ul></ul><ul><ul><li>Sufficient CPU resources </li></ul></ul><ul><ul><li>Support of HD Voice (headset only) </li></ul></ul><ul><ul><li>Intuitive UI makes for simple navigation between applications </li></ul></ul><ul><ul><li>Demand for 3 rd party apps is higher than other phones </li></ul></ul><ul><li>… but strengths present unique challenges </li></ul><ul><ul><li>Running too many applications can drain resources </li></ul></ul><ul><ul><li>Usage scenarios can negatively impact voice quality </li></ul></ul>
  • 7. iPhone Specific Challenges <ul><li>Only VoIP over WiFi currently possible </li></ul><ul><ul><li>3G network not available for Apple compliance </li></ul></ul><ul><li>Applications cannot run in the background </li></ul><ul><ul><li>Push notifications announced but not delivered </li></ul></ul><ul><ul><li>Rumors about background application support in next release </li></ul></ul><ul><li>Regular Mac audio APIs not available on iPhone </li></ul><ul><ul><li>Very iPhone specific solution had to be designed </li></ul></ul><ul><li>Application must monitor change of audio route (e.g. headset in/out) and handle this </li></ul><ul><li>Wideband audio not available via built-in microphone </li></ul>
  • 8. What’s Needed? <ul><li>Robustness </li></ul><ul><ul><li>Robust speech codec and smooth packet loss concealment </li></ul></ul><ul><ul><li>Adapt to network busts and excessive mobile jitter </li></ul></ul><ul><li>Efficiency </li></ul><ul><ul><li>Optimized for ARM processors on iPhones prolongs battery life </li></ul></ul><ul><li>Audio quality </li></ul><ul><ul><li>Codecs designed for IP networks </li></ul></ul><ul><ul><li>HD voice </li></ul></ul><ul><ul><li>Aggressive Voice Quality Enhancement </li></ul></ul><ul><ul><ul><li>Detect and cancel background noise </li></ul></ul></ul><ul><ul><ul><li>Suppress acoustic echo </li></ul></ul></ul>
  • 9. Summary <ul><li>High quality VoIP on iPhone and iPod touch available today </li></ul><ul><ul><li>Nimbuzz, truphone,… </li></ul></ul><ul><li>Remaining challenges </li></ul><ul><ul><li>Applications cannot run in the background </li></ul></ul><ul><ul><li>VoIP over 3G not allowed </li></ul></ul><ul><li>Two-way video not yet possible  </li></ul><ul><ul><li>No application access to camera  </li></ul></ul><ul><ul><li>No front-facing camera </li></ul></ul><ul><ul><li>And no, Apple doesn’t have a patent on video conferencing for touch screen phones </li></ul></ul>
  • 10.  

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