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| Number | Title | Issue Date |
| 4763278 | Speaker-independent word recognizer Speaker-independent word recognition is performed, based on a small acoustically distinct vocabulary, with minimal hardware requirements. After a simple preconditioning filter, the zero crossing intervals of the input speech are measured and sorted by dur... | 08/09/1988 |
| 4742547 | Pattern matching apparatus A pattern matching apparatus wherein an input pattern is compared against a reference pattern by a distance or similarity measure (dij) between data at respective time points (i, j) of the two patterns. An integration variable (gij) ... | 05/03/1988 |
| 4720864 | Speech recognition apparatus This invention relates to a speech recognition apparatus for raising the recognition speed, which is provided with first and second processors, the first processor mainly carrying out feature extraction of the input speech, the second one mainly carrying ... | 01/19/1988 |
| 4715004 | Pattern recognition system In speech recognition, an unknown input signal is analyzed for its feature pattern sequence Ai which is compared to prestored reference patterns grouped in categories. Each category m has a representative reference pattern Bm which r... | 12/22/1987 |
| 4608708 | Pattern matching system A pattern matching system comparing two patterns A and B, at least one of which is compressed in accordance with a piecewise straight line approximation and is represented by a series of representative vectors, of fewer number than the uncompressed patter... | 08/26/1986 |
| 4601054 | Pattern distance calculating equipment A pattern recognition apparatus for recognizing spoken words of a nonspecific speaker or of a specific speaker. A reference pattern composed of a sequence of feature vectors, each composed of n feature parameters, bi, is stored. The reference p... | 07/15/1986 |
| 4592085 | Speech-recognition method and apparatus for recognizing phonemes in a voice signal Phoneme recognition uses the silence-phoneme and phoneme-phoneme transition spectral information rather than the phoneme information itself. The transition detector features first and second differences in level for each frequency band.... | 05/27/1986 |
| 4592086 | Continuous speech recognition system A continuous speech recognition system determines the similarity between input patterns and reference patterns over time such that similarities between previously spoken speech patterns and reference patterns are determined while speech continues to be sp... | 05/27/1986 |
| 4571697 | Apparatus for calculating pattern dissimilarity between patterns Apparatus for calculating the distance between two patterns, each given in the form of time sequences of vectors, by using the distance between a feature vector of one pattern and a line segment connecting two feature vectors of the other pattern. The app... | 02/18/1986 |
| 4528688 | Continuous speech recognition method This speech signal recognition system compares the two-dimensionals pattern (time sequence of feature vectors) of an unknown signal to prestored standard references patterns for recognition, thus forming a corresponding two-dimensional comparison pattern ... | 07/09/1985 |
| 4490839 | Method and arrangement for sound analysis For sound analysis, especially for speaker identification, a long-term spectrum is often formed from the recorded signal and compared to a long-term spectrum of a previously recorded signal. When the signal is, for example, received over telephone lines t... | 12/25/1984 |
| 4479236 | Pattern matching device operable with signals of a compressed dynamic range A pattern matching device generally comprises a first circuit (36) for calculating an elementary similarity measure between two feature vectors, one and the other selected from two feature vector sequences representative of two patterns, respectively, and... | 10/23/1984 |
| 4426551 | Speech recognition method and device Speech sound recognition is made using a reduced number of speech parameter elements, e.g., five correlation coefficients rather than sixteen spectral coefficients. The five correlation coefficients are derived from comparison of the spectral coefficients... | 01/17/1984 |
| 4405838 | Phoneme information extracting apparatus A phoneme information extracting apparatus includes correlation data generators for successively generating correlation data representing the correlation between the acoustic power spectrum data corresponding to input voice and power spectrum data of vari... | 09/20/1983 |
| 4400828 | Word recognizer An input word is recognized as one of a set of reference words. A set of word distance signals representative of the correspondence of the input word to the reference words is generated. A set of weighted word distance signals is also generated. Responsiv... | 08/23/1983 |
| 4363102 | Speaker identification system using word recognition templates In a speaker recognition and verification arrangement, acoustic feature templates are stored for predetermined reference words. Each template is a standardized set of acoustic features for one word, formed for example by averaging the values of acoustic f... | 12/07/1982 |
| 4326101 | System for recognizing a word sequence by dynamic programming and by the use of a state transition diagram Operation of a continuous speech recognition system operable according to the dynamic programming technique, is controlled by a state transition diagram in compliance with which word sequences to be recognized by the system with reference to a predetermin... | 04/20/1982 |
| 4292471 | Method of verifying a speaker An improved method of verifying the speaker from whom long term spectral characteristics have been derived during a learning phase. Mean values and distance thresholds have been calculated and stored. Improved recognition is obtained by incorporating into... | 09/29/1981 |
| 4256924 | Device for recognizing an input pattern with approximate patterns used for reference patterns on mapping In a speech recognition system which time-normalizes (i.e. aligns by time-warping) each pre-stored reference pattern of feature vectors bj before comparison with the input signal pattern vectors ai, an improved time-alignment techniq... | 03/17/1981 |
