Restaino; Thomas A., Brown; Kenneth M. - US Patent Attorneys and Agents

Attorney: Restaino; Thomas A., Brown; Kenneth M.

Number of patents: 28
Last date: June 27, 2000

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Number	Title	Issue Date
6081782	Voice command control and verification system A voice command control and verification system and method stores for each authorized user, one or a series of speech models of voice commands or phrases uttered by the authorized user. Each speech model has an associated action component which specifies ...	06/27/2000
6014621	Synthesis of speech signals in the absence of coded parameters A speech compression system called "Transform Predictive Coding", or TPC, provides for encoding 7 kHz wideband speech (16 kHz sampling) at a target bit-rate range of 16 to 32 kb/s (1 to 2 bits/sample). The system uses short-term and long-term prediction t...	01/11/2000
5884010	Linear prediction coefficient generation during frame erasure or packet loss A speech coding system robust to frame erasure (or packet loss) is described. Illustrative embodiments are directed to a modified version of CCITT standard G.728. In the event of frame erasure, vectors of an excitation signal are synthesized based on prev...	03/16/1999
5884253	Prototype waveform speech coding with interpolation of pitch, pitch-period waveforms, and synthesis filter A speech coding system providing reconstructed voiced speech with a smoothly evolving pitch-cycle waveform. A speech signal is represented by isolating and coding prototype waveforms. Each prototype waveform is an exemplary pitch-cycle of voiced speech. A...	03/16/1999
5790759	Perceptual noise masking measure based on synthesis filter frequency response A speech compression system called "Transform Predictive Coding", or TPC, provides for encoding 7 kHz wideband speech (16 kHz sampling) at a target bit-rate range of 16 to 32 kb/s (1 to 2 bits/sample). The system uses short-term and long-term prediction t...	08/04/1998
5737724	Speech recognition employing a permissive recognition criterion for a repeated phrase utterance The invention relates to a method and apparatus for speech recognition, the speech to be recognized including one or more words. Recognition is based on an analysis of a first and a second utterance. In accordance with the invention, the first utterance i...	04/07/1998
5732389	Voiced/unvoiced classification of speech for excitation codebook selection in celp speech decoding during frame erasures A CELP speech decoder includes a first portion comprising an adaptive codebook and a second portion comprising a fixed codebook. The CS-ACELP decoder generates a speech excitation signal selectively based on output signals from said first and second porti...	03/24/1998
5719993	Long term predictor An improved long-term predictor (LTP) for use in analysis-by-synthesis coding systems, such as CELP is disclosed. The invention provides control of the periodicity of speech signals generated by the LTP. This control facilitates a reduction in perceptible...	02/17/1998
5717823	Speech-rate modification for linear-prediction based analysis-by-synthesis speech coders Synergy between operations performed by a speech-rate modification system and those operations performed in a speech coding system is exploited to provide a speech-rate modification system with reduced hardware requirements. The speech rate of an input si...	02/10/1998
5717822	Computational complexity reduction during frame erasure of packet loss A speech coding system robust to frame erasure (or packet loss) is described. Illustrative embodiments are directed to a modified version of CCITT standard G.728. In the event of frame erasure, vectors of an excitation signal are synthesized based on prev...	02/10/1998
5710863	Speech signal quantization using human auditory models in predictive coding systems A speech compression system called "Transform Predictive Coding", or TPC, provides for encoding 7 kHz wideband speech (160 kHz sampling) at a target bit-rate range of 16 to 32 kb/s (1 to 2 bits/sample). The system uses short-term and long-term prediction ...	01/20/1998
5699485	Pitch delay modification during frame erasures In a speech decoder which experiences frame erasure, the pitch delay associated with the first of consecutive erased frames is incremented. The incremented value is used as the pitch delay for the second of consecutive erased frames. Pitch delay associate...	12/16/1997
5682442	Image processing system An image-processing system for perceptual coding of an image is disclosed. Coding is accomplished through an analysis of human visual sensitivity to noise in halftone images and an analysis of one or more signals representing the image to be coded. These ...	10/28/1997
5675704	Speaker verification with cohort normalized scoring A facility is provided for allowing a caller to place a telephone call by merely uttering a label identifying a desired called destination and to charge the telephone call to a particular billing account by merely uttering a label identifying that account...	10/07/1997
5664055	CS-ACELP speech compression system with adaptive pitch prediction filter gain based on a measure of periodicity A speech coding system employing an adaptive codebook model of periodicity is augmented with a pitch-predictive filter (PPF). This PPF has a delay equal to the integer component of the pitch-period and a gain which is adaptive based on a measure of period...	09/02/1997
5644648	Method and apparatus for connected and degraded text recognition A method and apparatus for recognizing connected and degraded text is presented. A text enhancement process which may be used in combination with text recognition comprises filtering a scanned image to determine whether a binary image value of an image pi...	07/01/1997
5615298	Excitation signal synthesis during frame erasure or packet loss A speech coding system robust to frame erasure (or packet loss) is described. Illustrative embodiments are directed to a modified version of CCITT standard G.728. In the event of frame erasure, vectors of an excitation signal are synthesized based on prev...	03/25/1997
5606644	Minimum error rate training of combined string models A method of making a speech recognition model database is disclosed. The database is formed based on a training string utterance signal and a plurality of sets of current speech recognition models. The sets of current speech recognition models may include...	02/25/1997
5594798	Secure telecommunications A security node disposed in the telecommunications network connecting calling and called parties transforms information (which can be voice, data, facsimile, video and other types of calls or messages) encrypted in a first format to (a) encrypted informat...	01/14/1997
5586191	Adjustable filter for differential microphones A method and apparatus for providing a differential microphone with a desired frequency response are disclosed. The desired frequency response is provided by operation of a filter, having an adjustable frequency response, coupled to the microphone. The fr...	12/17/1996
5579436	Recognition unit model training based on competing word and word string models A system pattern-based speech recognition, e.g., a hidden Markov model (HMM) based speech recognizer using Viterbi scoring. The principle of minimum recognition error rate is applied by the present invention using discriminative training. Various issues r...	11/26/1996
5574825	Linear prediction coefficient generation during frame erasure or packet loss A speech coding system robust to frame erasure (or packet loss) is described. Illustrative embodiments are directed to a modified version of CCITT standard G.728. In the event of frame erasure, vectors of an excitation signal are synthesized based on prev...	11/12/1996
5481308	Method and apparatus for synthesizing subband video images A method of coding a set of multi- level signals, such as video signals comprises filtering the set of multi-level signals into one or more sets of multi-level sub-band signals; allocating a first quantity of bits for use in coding a first set of sub-band...	01/02/1996
5442696	Method and apparatus for detecting control signals The present invention provides a method and apparatus for detecting control signal information for an element of a communication system. The control signal information is included in one or more segments of a signal communicated over a communication syste...	08/15/1995
5404167	Subband color video coding using a reduced motion information subband A technique for coding color components of video signals wherein a color component of an image signal sequence is filtered into a plurality of subband image signals. One or more pixels of a first subband image signal are coded using one or more bits of a ...	04/04/1995
5388163	Electret transducer array and fabrication technique An electret transducer array and fabrication technique are disclosed. The array comprises a foil having a layer of insulating material and a layer of metal in contact therewith. The layer of metal comprises one or more discrete areas of metal which define...	02/07/1995
5377301	Technique for modifying reference vector quantized speech feature signals A signal processing arrangement uses a codebook of first vector quantized speech feature signals formed responsive to a large collection of speech feature signals. The codebook is altered by combining the first speech feature signals of the codebook with ...	12/27/1994
5309232	Dynamic bit allocation for three-dimensional subband video coding The present invention provides a method of coding a set of multi-level signals, such as video signals. The method comprises filtering the set of multi-level signals into one or more sets of multi-level sub-band signals; allocating a first quantity of bits...	05/03/1994

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Attorney: Restaino; Thomas A., Brown; Kenneth M.