speech recognition

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Related to Automatic speech recognizer: Voice recognition

speech recognition

[′spēch ‚rek·ig′nish·ən]
(engineering acoustics)
The process of analyzing an acoustic speech signal to identify the linguistic message that was intended, so that a machine can correctly respond to spoken commands.

speech recognition

(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.
References in periodicals archive ?
He showed that such "idiolectal" features of speech, obtainable from word transcripts, even errorful transcripts produced by automatic speech recognizers, could greatly enhance performance.
eScription's Script family of products consists of IntelliScript(TM), the dictation server; EditScript(TM), the transcription and document-distribution product; and AutoScript(TM), the automatic speech recognizer used to produce a draft dictation.
The agreement marks the second integrated offering under an alliance formed by the two companies in November, 1998, when Unisys and Lucent Speech Solutions agreed to integrate NLSA with Lucent's state-of-the-art text-to-speech and automatic speech recognizer engines.

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