Voice Processing (Ch. 11)

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Voice Processing (Ch. 11)

• ENGR 475 Telecommunications
• September 8, 2006
• Jonathan White

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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 1970s.

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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.

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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.

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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

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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?

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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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