Voice processing ch 11
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Voice Processing (Ch. 11). ENGR 475 – Telecommunications September 8, 2006 Jonathan White. What Voice Processing is. When you interact with an automated telephone system using your voice. 2 major applications: Directing calls (hated) Message manipulation (loved)

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Voice Processing (Ch. 11)

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Voice processing ch 11

Voice Processing (Ch. 11)

ENGR 475 – Telecommunications

September 8, 2006

Jonathan White


What voice processing is

What Voice Processing is

  • When you interact with an automated telephone system using your voice.

  • 2 major applications:

    • Directing calls (hated)

    • Message manipulation (loved)

  • Voice processing has a long history – voice mail was actually invented in the 1970’s.


Voice touch tone recognition

Voice/Touch Tone Recognition

  • Most voice processing systems depend on touch tone input from callers.

  • An alternative is voice recognition.

    • Still very limited.

    • Systems can be trained to recognize many words from one user or a few words from many users.

    • Good for enrolling in classes.

    • Voice to text transformations.

  • Incredible improvements are being made in this field using sophisticated applications of math and DSP.


Voice dialing

Voice Dialing

  • You can train your cell phone to dial a number when you say something.

  • This logic is actually stored on your cell phone

  • Stored on a PBX in a shared environment.


Automated attendant automated distributor

Automated Attendant/ Automated Distributor

  • Almost universally reviled.

  • You talk and interact with a machine.

  • Performs these functions:

    • Answers telephone.

    • Announces options.

    • Accepts touch tone/voice input.

    • Forwards calls to proper human.

    • Plays music while you are on hold.

  • http://www.databasesystemscorp.com/psautoattendant.htm

  • Skype / Asterisk do this already


Voice mail

Voice Mail

  • Many uses

  • Features:

    • answer many phones at the same time

    • store incoming voice messages in personalized mailboxes associated with the user's phone number

    • enable users to forward received messages to another voice mailbox

    • send messages to one or more other user voice mailboxes

    • add a voice introduction to a forwarded message

    • store voice messages for future delivery

    • make calls to a telephone or paging service to notify the user a message has arrived in his/her mailbox

    • transfer callers to another phone number for personal assistance

    • play different message greetings to different callers.

  • Is this an excuse to never answer your phone again?


Voice mail architecture

Voice Mail Architecture

  • Voice mail is stored on a server

  • Typically connected to your PBX

  • On your cell phone, your voice mail is not stored on your phone.

  • Voice is compressed when it is stored.


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