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Browse Prior Art Database

Speech-Activated Telephone Answering System

IP.com Disclosure Number: IPCOM000116059D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 109K

Publishing Venue

IBM

Related People

Cohen, PS: AUTHOR [+2]

Abstract

Disclosed is a telephone answering system having a speech recognition capability, accepting speech commands, and having an ability to use a caller identification service to provide various functions. Speech commands are used, for example, to save, delete, or route messages to various individuals using the system, and to leave private messages for certain individuals. The caller identification system is used to recognize certain callers, greeting them with specific messages and granting them certain privileges, such as access to certain messages, the ability to cause the phone to ring after it has been turned off, the ability to activate a speaker phone in the house, and the ability to monitor noises and sounds in the house.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 51% of the total text.

Speech-Activated Telephone Answering System

      Disclosed is a telephone answering system having a speech
recognition capability, accepting speech commands, and having an
ability to use a caller identification service to provide various
functions.  Speech commands are used, for example, to save, delete,
or route messages to various individuals using the system, and to
leave private messages for certain individuals.  The caller
identification system is used to recognize certain callers, greeting
them with specific messages and granting them certain privileges,
such as access to certain messages, the ability to cause the phone to
ring after it has been turned off, the ability to activate a speaker
phone in the house, and the ability to monitor noises and sounds in
the house.  Suitable caller identification systems are Dialed Number
Identifier Service (DNIS), Automatic Number Identification (ANI),
Calling Line Identifier (CLID), and Caller ID.  Such privileges may
also or alternatively be granted after a caller invokes a password.

      The answering system may also use calling number identification
to answer specific numbers through the recording system, not allowing
the telephone to ring.  A phone number may be blocked from
communication with the user, and a predetermined message may be
played when a call is received from such a blocked number.
Additionally, spoken commands are preferably used to set-up and
define the parameters of these various features and to activate them
as needed.  For example, speech commands may be used to define
different modes of operation for different times of the day or week,
or to change the answering message.  Specific words or phrases, such
as "emergency," may be used to override default settings of the
system, for example, ringing messages through to the user instead of
simply recording them.  Various controls of a conventional telephone
answering system are preferably placed under the control of spoken
commands, with the system asking, for example, "How many rings before
I pick up?"

      The answering system may also have the ability to load specific
grammars, phonemes, contexts, acoustic models, and other phonological
data, based on the calling number identification supplied by the
caller identification system.  In this way, vocal characteristics and
patterns of people calling from specific numbers may be taken into
account to improve the accuracy of the speech recognition process.

      Within the speech recognition process of the answering system,
both speaker-independent and speaker-dependent phonological models
are preferably active, with speaker-independent models being used for
simple dialogues with unknown speakers, and with speaker-dependent
models being used or imbedded in grammars for known individ...