portada Phonological Parsing in Speech Recognition (en Inglés)

Phonological Parsing in Speech Recognition (en Inglés)

Formato

Libro Físico

Autor

K. Church

Editorial

Springer

Idioma

Inglés

N° páginas

272

Encuadernación

Tapa Blanda

Dimensiones

25.4x17.8x1.5 cm

Peso

0.50 kg.

ISBN13

9781461292005

Categorías

Ingeniería electrónica
Inteligencia artificial
Jardinería

Phonological Parsing in Speech Recognition (en Inglés)

K. Church (Autor) · Springer · Tapa Blanda

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Reseña del libro "Phonological Parsing in Speech Recognition (en Inglés)"

It is well-known that phonemes have different acoustic realizations depending on the context. Thus, for example, the phoneme /t! is typically realized with a heavily aspirated strong burst at the beginning of a syllable as in the word Tom, but without a burst at the end of a syllable in a word like cat. Variation such as this is often considered to be problematic for speech recogni- tion: (1) "In most systems for sentence recognition, such modifications must be viewed as a kind of 'noise' that makes it more difficult to hypothesize lexical candidates given an in- put phonetic transcription. To see that this must be the case, we note that each phonological rule [in a certain example] results in irreversible ambiguity-the phonological rule does not have a unique inverse that could be used to recover the underlying phonemic representation for a lexical item. For example, . . . schwa vowels could be the first vowel in a word like 'about' or the surface realization of almost any English vowel appearing in a sufficiently destressed word. The tongue flap [(] could have come from a /t! or a /d/. " [65, pp. 548-549] This view of allophonic variation is representative of much of the speech recognition literature, especially during the late 1970's. One can find similar statements by Cole and Jakimik [22] and by Jelinek [50].