Patents by Inventor Shridhar K. Mukund
Shridhar K. Mukund 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: 11664042Abstract: A head-worn audio device is provided with a circuit for voice signal enhancement. The circuit comprises at least a plurality of microphones, arranged at predefined positions, where each microphone provides a microphone signal. The circuit further comprises a directivity pre-processor and a blind source separation processor. The directivity pre-processor is connected with the plurality of microphones to receive the microphone signals and being configured to provide at least a voice signal and a noise signal. Directivity pre-processing increases the mutual independence of the signals provided to the blind source separation processor and thus improves processing by blind source separation. The blind source separation processor receives at least the voice signal and the noise signal, and is configured to conduct blind source separation on at least the voice signal and the noise signal to provide at least an enhanced voice signal with reduced noise components.Type: GrantFiled: May 25, 2021Date of Patent: May 30, 2023Assignee: Plantronics, Inc.Inventors: Shridhar K. Mukund, Pamornpol Jinachitra
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Patent number: 11494473Abstract: A headset for acoustic authentication of a user is provided, the headset comprising at least a first microphone, a second microphone, a controllable filter, and an authenticator. The first microphone is arranged to obtain a first input signal. The second microphone is arranged to obtain a second input signal. The controllable filter is configured to receive the first input signal and the second input signal and to determine at least one filter transfer function from the received first input signal and the second input signal. The authenticator is configured to determine a current user acoustic signature from the at least one filter transfer function and to compare the current user acoustic signature with a predefined user acoustic signature and to authenticate the user based on the comparison of the current user acoustic signature with the predefined user acoustic signature.Type: GrantFiled: May 18, 2018Date of Patent: November 8, 2022Assignee: PLANTRONICS, INC.Inventor: Shridhar K Mukund
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Publication number: 20210280203Abstract: A head-worn audio device is provided with a circuit for voice signal enhancement. The circuit comprises at least a plurality of microphones, arranged at predefined positions, where each microphone provides a microphone signal. The circuit further comprises a directivity pre-processor and a blind source separation processor. The directivity pre-processor is connected with the plurality of microphones to receive the microphone signals and being configured to provide at least a voice signal and a noise signal. Directivity pre-processing increases the mutual independence of the signals provided to the blind source separation processor and thus improves processing by blind source separation. The blind source separation processor receives at least the voice signal and the noise signal, and is configured to conduct blind source separation on at least the voice signal and the noise signal to provide at least an enhanced voice signal with reduced noise components.Type: ApplicationFiled: May 25, 2021Publication date: September 9, 2021Applicant: Plantronics, Inc.Inventors: Shridhar K. Mukund, Pamornpol Jinachitra
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Patent number: 11049509Abstract: A head-worn audio device is provided with a circuit for voice signal enhancement. The circuit comprises at least a plurality of microphones, arranged at predefined positions, where each microphone provides a microphone signal. The circuit further comprises a directivity pre-processor and a blind source separation processor. The directivity pre-processor is connected with the plurality of microphones to receive the microphone signals and being configured to provide at least a voice signal and a noise signal. Directivity pre-processing increases the mutual independence of the signals provided to the blind source separation processor and thus improves processing by blind source separation. The blind source separation processor receives at least the voice signal and the noise signal, and is configured to conduct blind source separation on at least the voice signal and the noise signal to provide at least an enhanced voice signal with reduced noise components.Type: GrantFiled: March 6, 2019Date of Patent: June 29, 2021Assignee: PLANTRONICS, INC.Inventors: Shridhar K Mukund, Pamornpol Jinachitra
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Publication number: 20200286500Abstract: A head-worn audio device is provided with a circuit for voice signal enhancement. The circuit comprises at least a plurality of microphones, arranged at predefined positions, where each microphone provides a microphone signal. The circuit further comprises a directivity pre-processor and a blind source separation processor. The directivity pre-processor is connected with the plurality of microphones to receive the microphone signals and being configured to provide at least a voice signal and a noise signal. Directivity pre-processing increases the mutual independence of the signals provided to the blind source separation processor and thus improves processing by blind source separation. The blind source separation processor receives at least the voice signal and the noise signal, and is configured to conduct blind source separation on at least the voice signal and the noise signal to provide at least an enhanced voice signal with reduced noise components.Type: ApplicationFiled: March 6, 2019Publication date: September 10, 2020Applicant: Plantronics, Inc.Inventors: Shridhar K. Mukund, Pamornpol Jinachitra
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Publication number: 20200202626Abstract: Methods and apparatuses for identifying and indicating open space noise are described. In one example, a method includes receiving an audio sensor data from a plurality of microphones disposed at known locations throughout an open space. The method includes generating a three-dimensional sound map data from the audio sensor data. The method further includes generating an augmented reality visualization of the three-dimensional sound map data, which includes capturing with a video camera at a mobile device a video image of the open space, displaying the video image on a display screen of the mobile device, and overlaying a visualization of the three-dimensional sound map data on the video image on the display screen.Type: ApplicationFiled: December 21, 2018Publication date: June 25, 2020Applicant: Plantronics, Inc.Inventors: David W Moody, Shridhar K. Mukund
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Publication number: 20200184057Abstract: A headset for acoustic authentication of a user is provided, the headset comprising at least a first microphone, a second microphone, a controllable filter, and an authenticator. The first microphone is arranged to obtain a first input signal. The controllable filter is configured to receive the first input signal and the second input signal and to determine at least one filter transfer function from the received first input signal and the second input signal. The authenticator is configured to determine a current user acoustic signature from the at least one filter transfer function and to compare the current user acoustic signature with a predefined user acoustic signature and to authenticate the user based on the comparison of the current user acoustic signature with the predefined user acoustic signature.Type: ApplicationFiled: May 18, 2018Publication date: June 11, 2020Applicant: Plantronics, Inc.Inventor: Shridhar K Mukund
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Patent number: 9794678Abstract: A method for perceptual enhancement of a received remote talker's voice, in the presence of local ambient noise, in an electronic voice communication system is provided. The method includes generating a pair of binaural voice signals from the remote talker's voice and manipulating the characteristics of the resulting pair of binaural signals. The two ears of the local listener are stimulated binaurally with the pair of binaural voice signals. The stimulating is performed adaptively as the ambient noise in the local listener's environment changes, thereby creating a perception of remote talker reacting actively to the local ambient noise, in a psycho-acoustically pleasing manner to the local listener.Type: GrantFiled: May 14, 2012Date of Patent: October 17, 2017Assignee: Plantronics, Inc.Inventor: Shridhar K Mukund
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Publication number: 20170195779Abstract: A method for perceptual enhancement of a received remote talker's voice, in the presence of local ambient noise, in an electronic voice communication system is provided. The method includes generating a pair of binaural voice signals from the remote talker's voice and manipulating the characteristics of the resulting pair of binaural signals. The two ears of the local listener are stimulated binaurally with the pair of binaural voice signals. The stimulating is performed adaptively as the ambient noise in the local listener's environment changes, thereby creating a perception of remote talker reacting actively to the local ambient noise, in a psycho-acoustically pleasing manner to the local listener.Type: ApplicationFiled: May 14, 2012Publication date: July 6, 2017Inventor: Shridhar K. Mukund
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Patent number: 8670554Abstract: A method is provided for encoding multiple microphone signals into a composite source-separable audio (SSA) signal, conducive for transmission over a voice network. The embodiments enable the processing of source separation of the target voice signal from its ambient sound to be performed at any point in the voice communication network, including the internet cloud. A multiplicity of processing is possible over the SSA signal, based on the intended voice application. The level of processing is adapted with the availability of the processing power at the chosen processing node in the network in one embodiment. An apparatus for separating out the target source voice from its ambient sound is also provided. The apparatus includes a directed source separation (DSS) unit, which processes the two virtual microphone signals in the SSA representation, to generate a new SSA signal including the enhanced target voice and the enhanced ambient noise.Type: GrantFiled: April 20, 2012Date of Patent: March 11, 2014Assignee: Aurenta Inc.Inventor: Shridhar K. Mukund
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Publication number: 20120288125Abstract: A method for perceptual enhancement of a received remote talker's voice, in the presence of local ambient noise, in an electronic voice communication system is provided. The method includes generating a pair of binaural voice signals from the remote talker's voice and manipulating the characteristics of the resulting pair of binaural signals. The two ears of the local listener are stimulated binaurally with the pair of binaural voice signals. The stimulating is performed adaptively as the ambient noise in the local listener's environment changes, thereby creating a perception of remote talker reacting actively to the local ambient noise, in a psycho-acoustically pleasing manner to the local listener.Type: ApplicationFiled: May 14, 2012Publication date: November 15, 2012Inventor: Shridhar K. Mukund
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Publication number: 20120269332Abstract: A method is provided for encoding multiple microphone signals into a composite source-separable audio (SSA) signal, conducive for transmission over a voice network. The embodiments enable the processing of source separation of the target voice signal from its ambient sound to be performed at any point in the voice communication network, including the internet cloud. A multiplicity of processing is possible over the SSA signal, based on the intended voice application. The level of processing is adapted with the availability of the processing power at the chosen processing node in the network in one embodiment. An apparatus for separating out the target source voice from its ambient sound is also provided. The apparatus includes a directed source separation (DSS) unit, which processes the two virtual microphone signals in the SSA representation, to generate a new SSA signal including the enhanced target voice and the enhanced ambient noise.Type: ApplicationFiled: April 20, 2012Publication date: October 25, 2012Inventor: Shridhar K. Mukund
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Patent number: RE48402Abstract: A method is provided for encoding multiple microphone signals into a composite source-separable audio (SSA) signal, conducive for transmission over a voice network. The embodiments enable the processing of source separation of the target voice signal from its ambient sound to be performed at any point in the voice communication network, including the internet cloud. A multiplicity of processing is possible over the SSA signal, based on the intended voice application. The level of processing is adapted with the availability of the processing power at the chosen processing node in the network in one embodiment. An apparatus for separating out the target source voice from its ambient sound is also provided. The apparatus includes a directed source separation (DSS) unit, which processes the two virtual microphone signals in the SSA representation, to generate a new SSA signal including the enhanced target voice and the enhanced ambient noise.Type: GrantFiled: March 17, 2015Date of Patent: January 19, 2021Assignee: Plantronics, Inc.Inventor: Shridhar K Mukund