speech recognition

noun
Computers. the computerized analysis of spoken words in order to identify the speaker, as in security systems, or to respond to voiced commands: the analysis is performed by finding patterns in the spectrum of the incoming sound and comparing them with stored patterns of elements of sound, as phones, or of complete words.
Also called voice recognition.
Compare phone2.


Origin:
1950–55

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Collins
World English Dictionary
speech recognition
 
n
the understanding of continuous speech by a computer

Collins English Dictionary - Complete & Unabridged 10th Edition
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Dictionary.com's 21st Century Lexicon
Main Entry:  speech recognition
Part of Speech:  n
Definition:  See voice recognition
Dictionary.com's 21st Century Lexicon
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FOLDOC
Computing Dictionary

speech recognition definition

application
(Or voice recognition) The identification of spoken words by a machine. The spoken words are digitised (turned into sequence of numbers) and matched against coded dictionaries in order to identify the words.
Most systems must be "trained," requiring samples of all the actual words that will be spoken by the user of the system. The sample words are digitised, stored in the computer and used to match against future words. More sophisticated systems require voice samples, but not of every word. The system uses the voice samples in conjunction with dictionaries of larger vocabularies to match the incoming words. Yet other systems aim to be "speaker-independent", i.e. they will recognise words in their vocabulary from any speaker without training.
Another variation is the degree with which systems can cope with connected speech. People tend to run words together, e.g. "next week" becomes "neksweek" (the "t" is dropped). For a voice recognition system to identify words in connected speech it must take into account the way words are modified by the preceding and following words.
It has been said (in 1994) that computers will need to be something like 1000 times faster before large vocabulary (a few thousand words), speaker-independent, connected speech voice recognition will be feasible.
(1995-05-05)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Speech recognition and speech playback software expand the realizations of text
  into auditory as well as visual experiences.
Lip reading can improve speech recognition performance.
Today, computerized speech recognition is becoming a mainstream technology.
Crazy good, transformative, category-redefining speech recognition.
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