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| Number | Title | Issue Date |
| 4401851 | Voice recognition apparatus A speech recognition circuit in which acoustic power spectrum data corresponding to an input speech signal are sequentially generated, a vowel segment is determined based on the acoustic power spectrum data, and a vowel and a consonant are recognized base... | 08/30/1983 |
| 4388495 | Speech recognition microcomputer A simplified, speaker independent, selected vocabulary, word recognizing microcomputer functions without the use of a typical front end filtering network. The microcomputer identifies vowel-like fricative-like, and silence signal states within a word or p... | 06/14/1983 |
| 4343969 | Apparatus and method for articulatory speech recognition An apparatus and method are provided for the recognition of speech produced by various vocal pitches capable of recognition and classification of speech articulation at a real time rate. The apparatus and method assume that articulation of a given sound i... | 08/10/1982 |
| 4178472 | Voiced instruction identification system A voiced instruction identification system understands commands by examining a pattern of changes in short syllable (mora) sounds. Fundamental frequency is used as one symbolic value of mora for speech or humming sounds.... | 12/11/1979 |
| 4177589 | Three-dimensional animated facial control An artificially animated face with three-dimensional facial features formed of a flexible material is provided with remotely actuable concealed mechanisms for manipulating the jaw, rounding the mouth, and drawing the lower lip inward relative to the upper... | 12/11/1979 |
| 4087632 | Speech recognition system A speech recognition system is realized by applying a speech signal to a feature extractor wherein a sequence of predetermined features representing the speech signal are determined, and by comparing the determined features, in an acceptor, to predetermin... | 05/02/1978 |
| 4081607 | Keyword detection in continuous speech using continuous asynchronous correlation A system for detecting one or more keywords in continuous speech is disclosed wherein a speech processor extracts a plurality of analog speech parameters from the input continuous speech, an STV (Spectral Time Vector) generator circuit selectively convert... | 03/28/1978 |
| 4060694 | Speech recognition method and apparatus adapted to a plurality of different speakers Speech recognition in prior art uses one extracted characteristic component (xi) to represent one phoneme (Xi) as spoken by one speaker. This invention provides for recognizing the same phoneme as spoken by different speakers, by der... | 11/29/1977 |
| 3946157 | Speech recognition device for controlling a machine In an apparatus for speech recognition, intended for controlling machines, spoken words are synthesized from two to twelve phoneme classes. Phonemes are recognized by analysis of speech sounds, measuring and comparing energy and time-rate of change of ene... | 03/23/1976 |
