The document discusses different ways of communicating with computers, including traditional methods like keyboards and mice as well as modern methods like touch, speech, and motion. It focuses on speech synthesis and recognition, how they work, and their applications. Speech synthesis converts text to audio while recognition does the opposite. Examples of speech technology uses include movies, translation, language learning, mobiles, robotics, and games. The document also covers the Windows Speech API and its history, changes in newer versions of Windows to improve speech recognition, and a demo of speech synthesis and recognition in .NET.

1. Athens University of Economics

2. Communicating with PC
 Traditional ways
 Mouse
 Keyboard (printer)

3. Communicating with PC
 Traditional Ways
 Keyboard
 Mouse
 Printer
 Modern Ways
 touch
 speech
 Movement

4. Speech
 Speech Synthesis

5. Speech
 Speech Synthesis
 Speech Recognition

6. Speech Synthesis
 Input: Text
 Output: Audio stream

7. Speech Recognition
 Input: Audio stream
 Output: Text

8. Used In
 Movies 

9. Used In
 Movies 
 Automatic translations

10. Used In
 Movies 
 Automatic Translation
 Learning Foreign Languages

11. Used In
 Movies 
 Automatic Translation
 Learning Foreign Languages
 Mobiles

12. Used In
 Movies 
 Automatic Translation
 Learning Foreign Languages
 Movies
 Robotics

13. Used In
 Movies 
 Automatic Translation
 Learning Foreign Languages
 Movies
 Robotics
 Games
 Nintendo Wii
 Project Natal (Kinect)

14. What options do we have today;
 Acapela

15. What options do we have today;
 Acapela
 Java Speech API

16. What options do we have today;
 Acapela
 Java Speech API
 Dictaphones

17. Τι επιλογές έτοσμε σήμερα;
 Acapela
 Java Speech API
 Dictaphones
 etc
 Still a long way to go….

18. What we see here
 Windows Speech API (SAPI)
with .NET 4.0!
 System.Speech;

19. Why SAPI;
 free
 Quite accurate
 Easily programmable

20. History of SAPI
 1994: SAPI 1.0
 Windows 95 / Windows NT

21. History of SAPI
 1994: SAPI 1.0
 Windows 95 / Windows NT
 1998: SAPI 4.0
 C++ wrapper classes
 ActiveX for Visual basic

22. History of SAPI
 1994: SAPI 1.0
 Windows 95 / Windows NT
 1998: SAPI 4.0
 C++ wrapper classes
 ActiveX for Visual basic
 2006: SAPI 5.3
 Windows Vista

23. Ιστορία τοσ SAPI
 1994: SAPI 1.0
 Windows 95 / Windows NT
 1998: SAPI 4.0
 C++ wrapper classes
 ActiveX for Visual basic
 2006: SAPI 5.3
 Windows Vista
 2009: SAPI 5.4
 Windows 7

24. Αλλαγές στα Windows Vista & 7
 Αναβαθμισμένη Speech Recognition
engine

25. Changes in Windows Vista & 7
 Upgraded Speech Recognition engine
 Separate application with its own GUI

26. Changes in Windows Vista & 7
 Upgraded Speech Recognition engine
 Separate application with its own GUI
 Checks the UI operation

27. Changes in Windows Vista & 7
 Upgraded Speech Recognition engine
 Separate application with its own GUI
 Checks the UI operation
 Supports more languages -
 English US & UK, Chinese traditional & simplified,
Japanese, German, French, Spanish

28. Changes in Windows Vista & 7
 Upgraded Speech Recognition engine
 Separate application with its own GUI
 Checks the UI operation
 Supports more languages -
 English US & UK, Chinese traditional & simplified,
Japanese, German, French, Spanish
 Managed code speech API (.ΝΕΤ 3.0)

29. What we use
Technologies
• .NET Framework 4.0
• C# programming language
• Windows Presentation Foundation
Tools
• Windows 7
• Visual Studio 2010
• FREE @ MSDNAA

30. Windows Speech Synthesis
 Converts words into voice
 Internet settings like:
 intensity
 Pronunciation (voice)
 Introducing WAV files
 By default, uses Microsoft Anna

31. DEMO 1

32. Windows Speech Recognition
 Uses machine learning algorithms
 Continuously Trained
 Trains using the user’s voice
 Can be used for remote control of the
PC 

33. DEMO 2

34. Links
 Venus
 StudentGuru
 Exploring Speech Recognition &
Synthesis
 Speech Recognition with C# - Dictation
and custom grammar

35. Thank you 
Vangos Pterneas
www.vangos.eu
www.vangos.eu/blog