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| Number | Title | Issue Date |
| 4809332 | Speech processing apparatus and methods for processing burst-friction sounds Speech processing apparatus including an electronic memory and circuitry that derives from speech sets of digital values representative of frequency spectra. The spectra have peaks at frequencies associated therewith. The peaks include a highest magnitude... | 02/28/1989 |
| 4809331 | Apparatus and methods for speech analysis Input signals representative of speech are unreliable as inputs for speech recognition if processed conventionally by, among other processes, filtering into separate frequency bands. Further processing according to the invention takes the output from a fi... | 02/28/1989 |
| 4807289 | Apparatus for recording and reproducing human speech by its analysis and synthesis A speech analysis and synthesis device comprises analyzing and synthesizing means for analyzing human speech to produce analyzed data and for synthesizing human speech on the basis of the analyzed data, a dynamic RAM for memorizing the analyzed data, a re... | 02/21/1989 |
| 4769845 | Method of recognizing speech using a lip image A speech recognition method is implemented with an image pickup apparatus such as a TV camera which picks up a lip image during speech and with a small computer which has a small memory capacity and is connected to the TV camera. The computer receives and... | 09/06/1988 |
| 4752957 | Apparatus and method for recognizing unknown patterns Pattern recognition of speech or print input signal patterns is done by deforming the input signal (parameter vector pattern) to generate a set of orthonormal input patterns (basis vectors), the set compared with pre-stored reference vector patterns for s... | 06/21/1988 |
| 4751737 | Template generation method in a speech recognition system Disclosed is a method for generating word templates for a speech recognition system. It is used where speech is represented by data in frames of equal time intervals. The method includes generating an interim template, generating a time alignment path bet... | 06/14/1988 |
| 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 |
| 4704696 | Method and apparatus for voice control of a computer A voice control system for controlling execution of a computer program includes a microphone (10) operative to receive voice commands having the output thereof connected to a clipping circuit (12) which amplifies and clips the microphone output to generat... | 11/03/1987 |
| 4672667 | Method for signal processing A method and apparatus for processing a signal to extract selected information therefrom is provided. According to the method, an input signal is converted into a sequence of data samples, and these data samples are applied sequentially through a convolve... | 06/09/1987 |
| 4624009 | Signal pattern encoder and classifier An improved acoustic signal recognition system, suitable for speech or other acoustic pattern recognition, features data compression of original signal data to reduce requirements for data storage and comparison, as well as reduce recognition errors, the ... | 11/18/1986 |
| 4620316 | Speech recognition system A speech recognition system comprising a speech input device an analyzer for analyzing input speech to produce analyzed parameters and a discriminator for recognizing the input speech based on lthe analyzed parameters, has store/matching circuit at an inp... | 10/28/1986 |
| 4541110 | Circuit for automatic selection between speech and music sound signals Speech versus music is decided by comparing the presence of pauses greater than 32, 60 and 500 ms in the lower input spectrum, and 4 ms in the higher input spectrum.... | 09/10/1985 |
| 4509186 | Method and apparatus for speech message recognition Speech recognition by first log-compressing the speech signal, then filtering into subband signals which are subtracted to form an indicator of voiced, unvoiced and silence intervals, whereby sequence and duration patterns are coded in +1, -1, and zero.... | 04/02/1985 |
| 4432096 | Arrangement for recognizing sounds Sounds or speech signals are converted into an electrical sound and broken down into separate spectral components in a filter bank. These components are integrated over a short period of time and produce a short-time spectrum of the signal. The spectral c... | 02/14/1984 |
| 4426729 | Partial band - whole band energy discriminator Energy in a received signal is distinguished as being whole band energy or partial band energy by comparing an average value of the received signal to a modified magnitude value of the received signal. A signal representative of the comparison result is s... | 01/17/1984 |
| 4423291 | Method for operating a speech recognition device Speech recognition is improved by time-standardization of reference and unknown words of constant bit-length formed by suppressing bits or generating copy bits.... | 12/27/1983 |
| 4385359 | Multiple-channel voice input/output system A multiple channel voice I/O system including a control device and switching mechanism for enabling the system to handle a greater number of user channels than there are recognition inputs. The control unit responds to two types of commands from a host sy... | 05/24/1983 |
| 4314100 | Data detection circuit for a TASI system Disclosed is a circuit for determining whether an incoming signal is a speech signal or a data signal. In the preferred embodiment, means for separating the incoming signal into a low frequency component and a high frequency component are provided. The lo... | 02/02/1982 |
| 4241329 | Continuous speech recognition method for improving false alarm rates A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing one or more target patterns, and each target pattern comprises statist... | 12/23/1980 |
| 4227177 | Continuous speech recognition method A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing one or more target patterns, and each target pattern comprises statist... | 10/07/1980 |
| 4227176 | Continuous speech recognition method A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing a plurality of target patterns, and each target pattern comprises stat... | 10/07/1980 |
| 4109104 | Vocal timing indicator device for use in voice recognition A vocal timing indicator for use in voice recognition systems. The timing indicator provides a visual or audible signal to a user to mark the beginning of the time period in which the user is to speak into the microphone associated with the system, thereb... | 08/22/1978 |
| 3978287 | Real time analysis of voiced sounds A power spectrum analysis of the harmonic content of a voiced sound signal is conducted in real time by phase-lock-loop tracking of the fundamental frequency, fo, of the signal and successive harmonics hl through hn of the... | 08/31/1976 |
