Patents by Inventor Shreyas Paranjpe
Shreyas Paranjpe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8326621Abstract: A system improves the perceptual quality of a speech signal by dampening undesired repetitive transient noises. The system includes a repetitive transient noise detector adapted to detect repetitive transient noise in a received signal. The received signal may include a harmonic and a noise spectrum. The system further includes a repetitive transient noise attenuator that substantially removes or dampens repetitive transient noises from the received signal. The method of dampening the repetitive transient noises includes modeling characteristics of repetitive transient noises; detecting characteristics in the received signal that correspond to the modeled characteristics of the repetitive transient noises; and substantially removing components of the repetitive transient noises from the received signal that correspond to some or all of the modeled characteristics of the repetitive transient noises.Type: GrantFiled: November 30, 2011Date of Patent: December 4, 2012Assignee: QNX Software Systems LimitedInventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 8326617Abstract: A speech enhancement system enhances transitions between speech and non-speech segments. The system includes a background noise estimator that approximates the magnitude of a background noise of an input signal that includes a speech and a non-speech segment. A slave processor is programmed to perform the specialized task of modifying a spectral tilt of the input signal to match a plurality of expected spectral shapes selected by a Codec.Type: GrantFiled: May 22, 2009Date of Patent: December 4, 2012Assignee: QNX Software Systems LimitedInventors: Phillip A. Hetherington, Shreyas Paranjpe, Xueman Li
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Patent number: 8271279Abstract: A speech enhancement system improves the perceptual quality of a processed voice signal. The system improves the perceptual quality of a voice signal by removing unwanted noise components from a voice signal. The system removes undesirable signals that may result in the loss of information. The system receives and analyzes signals to determine whether an undesired random or persistent signal corresponds to one or more modeled noises. When one or more noise components are detected, the noise components are substantially removed or dampened from the signal to provide a less noisy voice signal.Type: GrantFiled: November 30, 2006Date of Patent: September 18, 2012Assignee: QNX Software Systems LimitedInventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 8244538Abstract: A system evaluates a hands free communication system. The system automatically selects a consonant-vowel-consonant (CVC), vowel-consonant-vowel (VCV), or other combination of sounds from an intelligent database. The selection is transmitted with another communication stream that temporally overlaps the selection. The quality of the communication system is evaluated through an automatic speech recognition engine. The evaluation occurs at a location remote from the transmitted selection.Type: GrantFiled: April 29, 2009Date of Patent: August 14, 2012Assignee: QNX Software Systems LimitedInventors: Shreyas Paranjpe, Mark Fallat
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Patent number: 8150681Abstract: A speech enhancement system improves the perceptual quality of an aural signal. A receiver detects and receives an unvoiced signal, a fully voiced signal, or a mixed voice remote signal. A coherence processor identifies the similarities or differences between a local signal and the remote signal. A cancellation processor or controller dampens reflected signals that may be part of the local signal.Type: GrantFiled: September 30, 2011Date of Patent: April 3, 2012Assignee: QNX Software Systems LimitedInventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Publication number: 20120076315Abstract: A system improves the perceptual quality of a speech signal by dampening undesired repetitive transient noises. The system includes a repetitive transient noise detector adapted to detect repetitive transient noise in a received signal. The received signal may include a harmonic and a noise spectrum. The system further includes a repetitive transient noise attenuator that substantially removes or dampens repetitive transient noises from the received signal. The method of dampening the repetitive transient noises includes modeling characteristics of repetitive transient noises; detecting characteristics in the received signal that correspond to the modeled characteristics of the repetitive transient noises; and substantially removing components of the repetitive transient noises from the received signal that correspond to some or all of the modeled characteristics of the repetitive transient noises.Type: ApplicationFiled: November 30, 2011Publication date: March 29, 2012Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Publication number: 20120020496Abstract: A speech enhancement system improves the perceptual quality of an aural signal. A receiver detects and receives an unvoiced signal, a fully voiced signal, or a mixed voice remote signal. A coherence processor identifies the similarities or differences between a local signal and the remote signal. A cancellation processor or controller dampens reflected signals that may be part of the local signal.Type: ApplicationFiled: September 30, 2011Publication date: January 26, 2012Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Publication number: 20110311068Abstract: A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a passing tire hiss noise detector and a passing tire hiss noise attenuator. The passing tire hiss noise detector detects a passing tire hiss noise by modeling the passing tire hiss. The passing tire hiss noise attenuator dampens the passing tire hiss noise to improve the intelligibility of a speech signal.Type: ApplicationFiled: September 1, 2011Publication date: December 22, 2011Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 8073689Abstract: A system improves the perceptual quality of a speech signal by dampening undesired repetitive transient noises. The system includes a repetitive transient noise detector adapted to detect repetitive transient noise in a received signal. The received signal may include a harmonic and a noise spectrum. The system further includes a repetitive transient noise attenuator that substantially removes or dampens repetitive transient noises from the received signal. The method of dampening the repetitive transient noises includes modeling characteristics of repetitive transient noises; detecting characteristics in the received signal that correspond to the modeled characteristics of the repetitive transient noises; and substantially removing components of the repetitive transient noises from the received signal that correspond to some or all of the modeled characteristics of the repetitive transient noises.Type: GrantFiled: January 13, 2006Date of Patent: December 6, 2011Assignee: QNX Software Systems Co.Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 8036879Abstract: A speech enhancement system improves the perceptual quality of an aural signal. A receiver detects and receives an unvoiced signal, a fully voiced signal, or a mixed voice remote signal. A coherence processor identifies the similarities or differences between a local signal and the remote signal. A cancellation processor or controller dampens reflected signals that may be part of the local signal.Type: GrantFiled: June 29, 2007Date of Patent: October 11, 2011Assignee: QNX Software Systems Co.Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 8027833Abstract: A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a passing tire hiss noise detector and a passing tire hiss noise attenuator. The passing tire hiss noise detector detects a passing tire hiss noise by modeling the passing tire hiss. The passing tire hiss noise attenuator dampens the passing tire hiss noise to improve the intelligibility of a speech signal.Type: GrantFiled: May 9, 2005Date of Patent: September 27, 2011Assignee: QNX Software Systems Co.Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Patent number: 7869994Abstract: A transient noise removal system removes or dampens undesired transients from speech. When the transient noise removal system receives a speech frame, the system performs a wavelet transform analysis. The speech frame may be represented by one or more wavelet coefficients across one or more wavelet levels. For a given wavelet level, the transient noise-removal system may determine a wavelet threshold. The transient noise removal system may compare the threshold corresponding to a wavelet level to the wavelet coefficients within that level. The transient noise removal system may attenuate each wavelet coefficient based on a comparison to a threshold.Type: GrantFiled: January 30, 2007Date of Patent: January 11, 2011Assignee: QNX Software Systems Co.Inventors: Rajeev Nongpiur, Shreyas A. Paranjpe, Phillip A. Hetherington
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Publication number: 20100198603Abstract: A sub-band processing system that reduces computational complexity and memory requirements includes a processor and a local or distributed memory. Logic stored in the memory partitions a frequency spectrum of bins into a smaller number of sub-bands. The logic enables a lossy compression by designating a magnitude and a designated or derived phase of each bin in the frequency spectrum as representative. The logic renders a lossless compression by decompressing the lossy compressed data and providing lost data based on original spectral relationships contained within the frequency spectrum.Type: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Applicant: QNX SOFTWARE SYSTEMS(WAVEMAKERS), Inc.Inventor: Shreyas Paranjpe
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Patent number: 7725315Abstract: A voice enhancement system is provided for improving the perceptual quality of a processed voice signal. The system improves the perceptual quality of a received voice signal by removing unwanted noise from a voice signal recorded by a microphone or from some other source. Specifically, the system removes sounds that occur within the environment of the signal source but which are unrelated to speech. The system is especially well adapted for removing transient road noises from speech signals recorded in moving vehicles. Transient road noises include common temporal and spectral characteristics that can be modeled. A transient road noise detector employs such models to detect the presence of transient road noises in a voice signal. If transient road noises are found to be present, a transient road noise attenuator is provided to remove them from the signal.Type: GrantFiled: October 17, 2005Date of Patent: May 25, 2010Assignee: QNX Software Systems (Wavemakers), Inc.Inventors: Phillip A. Hetherington, Shreyas Paranjpe
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Publication number: 20100036659Abstract: The present invention relates to a method for signal processing comprising the steps of providing a set of prototype spectral envelopes, providing a set of reference noise prototypes, wherein the reference noise prototypes are obtained from at least a sub-set of the provided set of prototype spectral envelopes, detecting a verbal utterance by at least one microphone to obtain a microphone signal, processing the microphone signal for noise reduction based on the provided reference noise prototypes to obtain an enhanced signal and encoding the enhanced signal based on the provided prototype spectral envelopes to obtain an encoded enhanced signal.Type: ApplicationFiled: August 7, 2009Publication date: February 11, 2010Applicant: Nuance Communications, Inc.Inventors: Tim Haulick, Mohamed Krini, Shreyas Paranjpe, Gerhard Schmidt
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Publication number: 20090292536Abstract: A speech enhancement system enhances transitions between speech and non-speech segments. The system includes a background noise estimator that approximates the magnitude of a background noise of an input signal that includes a speech and a non-speech segment. A slave processor is programmed to perform the specialized task of modifying a spectral tilt of the input signal to match a plurality of expected spectral shapes selected by a Codec.Type: ApplicationFiled: May 22, 2009Publication date: November 26, 2009Inventors: Phillip A. Hetherington, Shreyas Paranjpe, Xueman Li
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Publication number: 20090287481Abstract: A speech enhancement system improves speech conversion within an encoder and decoder. The system includes a first device that converts sound waves into operational signals. A second device selects a template that represents an expected signal model. The selected template models speech characteristics of the operational signals through a speech codebook that is further accessed in a communication channel.Type: ApplicationFiled: May 22, 2009Publication date: November 19, 2009Inventors: Shreyas Paranjpe, Phillip A. Hetherington, Xueman Li
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Publication number: 20090276220Abstract: A system evaluates a hands free communication system. The system automatically selects a consonant-vowel-consonant (CVC), vowel-consonant-vowel (VCV), or other combination of sounds from an intelligent database. The selection is transmitted with another communication stream that temporally overlaps the selection. The quality of the communication system is evaluated through an automatic speech recognition engine. The evaluation occurs at a location remote from the transmitted selection.Type: ApplicationFiled: April 29, 2009Publication date: November 5, 2009Inventors: Shreyas Paranjpe, Mark Fallat
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Publication number: 20080281584Abstract: A speech enhancement system improves the perceptual quality of an aural signal. A receiver detects and receives an unvoiced signal, a fully voiced signal, or a mixed voice remote signal. A coherence processor identifies the similarities or differences between a local signal and the remote signal. A cancellation processor or controller dampens reflected signals that may be part of the local signal.Type: ApplicationFiled: June 29, 2007Publication date: November 13, 2008Applicant: QNX SOFTWARE SYSTEMS (WAVEMAKERS), INC.Inventors: Phillip A. Hetherington, Shreyas A. Paranjpe
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Publication number: 20080183466Abstract: A transient noise removal system removes or dampens undesired transients from speech. When the transient noise removal system receives a speech frame, the system performs a wavelet transform analysis. The speech frame may be represented by one or more wavelet coefficients across one or more wavelet levels. For a given wavelet level, the transient noise-removal system may determine a wavelet threshold. The transient noise removal system may compare the threshold corresponding to a wavelet level to the wavelet coefficients within that level. The transient noise removal system may attenuate each wavelet coefficient based on a comparison to a threshold.Type: ApplicationFiled: January 30, 2007Publication date: July 31, 2008Inventors: Rajeev Nongpiur, Shreyas A. Paranjpe, Phillip A. Hetherington