Patents by Inventor Dimitrios Dimitriadis
Dimitrios Dimitriadis 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: 10083350Abstract: A system for sensor enhanced speech recognition is disclosed. The system may obtain visual content or other content associated with a user and an environment of the user. Additionally, the system may obtain, from the visual content, metadata associated with the user and the environment of the user. The system may also include determining, based on the visual content and metadata, if the user is speaking. If the user is determined to be speaking, the system may obtain audio content associated with the user and the environment. The system may then adapt, based on the visual content, audio content, and metadata, one or more acoustic models that match the user and the environment. Once the one or more acoustic models are adapted and loaded, the system may enhance a speech recognition process or other process associated with the user.Type: GrantFiled: January 11, 2018Date of Patent: September 25, 2018Assignee: AT&T Intellectual Property I, L.P.Inventors: Dimitrios Dimitriadis, Donald J. Bowen, Mazin E. Gilbert, Horst J. Schroeter
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Publication number: 20180262623Abstract: A pre-distortion system for improved mobile device communications via cancellation of nonlinear distortion is disclosed. The pre-distortion system may transmit an acoustic signal from a network to a device, wherein the acoustic signal includes a linear signal and a nonlinear cancellation signal that cancels at least a portion of nonlinear distortions created once a loudspeaker in the device emits the linear signal. Thus, when a loudspeaker of a mobile device is operating and nonlinear distortions are generated by the loudspeaker or adjacent components of the mobile device in close proximity to the loudspeaker, the pre-distortion system may create one or more nonlinear cancellation signals in the network. The nonlinear cancellation signal may be combined with the linear signal sent to the loudspeaker to cancel the nonlinear distortion signal created by the loudspeaker emitting acoustic sounds from the linear signal. Thus, the nonlinear cancellation signal becomes a pre-distortion signal.Type: ApplicationFiled: May 14, 2018Publication date: September 13, 2018Applicant: AT&T Intellectual Property I, L.P.Inventors: Horst J. Schroeter, Donald J. Bowen, Dimitrios Dimitriadis, Lusheng Ji
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Publication number: 20180182415Abstract: Disclosed herein are systems, methods, and computer-readable storage media for detecting voice activity in a media signal in an augmented, multi-tier classifier architecture. A system configured to practice the method can receive, from a first classifier, a first voice activity indicator detected in a first modality for a human subject. Then, the system can receive, from a second classifier, a second voice activity indicator detected in a second modality for the human subject, wherein the first voice activity indicator and the second voice activity indicators are based on the human subject at a same time, and wherein the first modality and the second modality are different. The system can concatenate, via a third classifier, the first voice activity indicator and the second voice activity indicator with original features of the human subject, to yield a classifier output, and determine voice activity based on the classifier output.Type: ApplicationFiled: February 12, 2018Publication date: June 28, 2018Inventors: Dimitrios DIMITRIADIS, Eric ZAVESKY, Matthew BURLICK
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Publication number: 20180181812Abstract: A system for exploiting visual information for enhancing audio signals via source separation and beamforming is disclosed. The system may obtain visual content associated with an environment of a user, and may extract, from the visual content, metadata associated with the environment. The system may determine a location of the user based on the extracted metadata. Additionally, the system may load, based on the location, an audio profile corresponding to the location of the user. The system may also load a user profile of the user that includes audio data associated with the user. Furthermore, the system may cancel, based on the audio profile and user profile, noise from the environment of the user. Moreover, the system may include adjusting, based on the audio profile and user profile, an audio signal generated by the user so as to enhance the audio signal during a communications session of the user.Type: ApplicationFiled: February 26, 2018Publication date: June 28, 2018Applicant: AT&T Intellectual Property I, L.P.Inventors: Dimitrios Dimitriadis, Donald J. Bowen, Lusheng Ji, Horst J. Schroeter
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Publication number: 20180137348Abstract: A system for sensor enhanced speech recognition is disclosed. The system may obtain visual content or other content associated with a user and an environment of the user. Additionally, the system may obtain, from the visual content, metadata associated with the user and the environment of the user. The system may also include determining, based on the visual content and metadata, if the user is speaking. If the user is determined to be speaking, the system may obtain audio content associated with the user and the environment. The system may then adapt, based on the visual content, audio content, and metadata, one or more acoustic models that match the user and the environment. Once the one or more acoustic models are adapted and loaded, the system may enhance a speech recognition process or other process associated with the user.Type: ApplicationFiled: January 11, 2018Publication date: May 17, 2018Applicant: AT&T Intellectual Property I, L.P.Inventors: Dimitrios Dimitriadis, Donald J. Bowen, Mazin E. Gilbert, Horst J. Schroeter
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Patent number: 9973633Abstract: A pre-distortion system for improved mobile device communications via cancellation of nonlinear distortion is disclosed. The pre-distortion system may transmit an acoustic signal from a network to a device, wherein the acoustic signal includes a linear signal and a nonlinear cancellation signal that cancels at least a portion of nonlinear distortions created once a loudspeaker in the device emits the linear signal. Thus, when a loudspeaker of a mobile device is operating and nonlinear distortions are generated by the loudspeaker or adjacent components of the mobile device in close proximity to the loudspeaker, the pre-distortion system may create one or more nonlinear cancellation signals in the network. The nonlinear cancellation signal may be combined with the linear signal sent to the loudspeaker to cancel the nonlinear distortion signal created by the loudspeaker emitting acoustic sounds from the linear signal. Thus, the nonlinear cancellation signal becomes a pre-distortion signal.Type: GrantFiled: November 17, 2014Date of Patent: May 15, 2018Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Horst J. Schroeter, Donald J. Bowen, Dimitrios Dimitriadis, Lusheng Ji
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Patent number: 9904851Abstract: A system for exploiting visual information for enhancing audio signals via source separation and beamforming is disclosed. The system may obtain visual content associated with an environment of a user, and may extract, from the visual content, metadata associated with the environment. The system may determine a location of the user based on the extracted metadata. Additionally, the system may load, based on the location, an audio profile corresponding to the location of the user. The system may also load a user profile of the user that includes audio data associated with the user. Furthermore, the system may cancel, based on the audio profile and user profile, noise from the environment of the user. Moreover, the system may include adjusting, based on the audio profile and user profile, an audio signal generated by the user so as to enhance the audio signal during a communications session of the user.Type: GrantFiled: June 11, 2014Date of Patent: February 27, 2018Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Dimitrios Dimitriadis, Donald J. Bowen, Lusheng Ji, Horst J. Schroeter
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Patent number: 9892745Abstract: Disclosed herein are systems, methods, and computer-readable storage media for detecting voice activity in a media signal in an augmented, multi-tier classifier architecture. A system configured to practice the method can receive, from a first classifier, a first voice activity indicator detected in a first modality for a human subject. Then, the system can receive, from a second classifier, a second voice activity indicator detected in a second modality for the human subject, wherein the first voice activity indicator and the second voice activity indicators are based on the human subject at a same time, and wherein the first modality and the second modality are different. The system can concatenate, via a third classifier, the first voice activity indicator and the second voice activity indicator with original features of the human subject, to yield a classifier output, and determine voice activity based on the classifier output.Type: GrantFiled: August 23, 2013Date of Patent: February 13, 2018Assignee: AT&T Intellectual Property I, L.P.Inventors: Dimitrios Dimitriadis, Eric Zavesky, Matthew Burlick
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Patent number: 9870500Abstract: A system for sensor enhanced speech recognition is disclosed. The system may obtain visual content or other content associated with a user and an environment of the user. Additionally, the system may obtain, from the visual content, metadata associated with the user and the environment of the user. The system may also include determining, based on the visual content and metadata, if the user is speaking. If the user is determined to be speaking, the system may obtain audio content associated with the user and the environment. The system may then adapt, based on the visual content, audio content, and metadata, one or more acoustic models that match the user and the environment. Once the one or more acoustic models are adapted and loaded, the system may enhance a speech recognition process or other process associated with the user.Type: GrantFiled: June 11, 2014Date of Patent: January 16, 2018Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Dimitrios Dimitriadis, Donald J. Bowen, Mazin E. Gilbert, Horst J. Schroeter
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Publication number: 20170358298Abstract: A system and method for processing speech includes receiving a first information stream associated with speech, the first information stream comprising micro-modulation features and receiving a second information stream associated with the speech, the second information stream comprising features. The method includes combining, via a non-linear multilayer perceptron, the first information stream and the second information stream to yield a third information stream. The system performs automatic speech recognition on the third information stream. The third information stream can also be used for training HMMs.Type: ApplicationFiled: August 29, 2017Publication date: December 14, 2017Inventors: Enrico Luigi BOCCHIERI, Dimitrios DIMITRIADIS
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Patent number: 9754587Abstract: A system and method for processing speech includes receiving a first information stream associated with speech, the first information stream comprising micro-modulation features and receiving a second information stream associated with the speech, the second information stream comprising features. The method includes combining, via a non-linear multilayer perceptron, the first information stream and the second information stream to yield a third information stream. The system performs automatic speech recognition on the third information stream. The third information stream can also be used for training HMMs.Type: GrantFiled: February 29, 2016Date of Patent: September 5, 2017Assignee: Nuance Communications, Inc.Inventors: Enrico Luigi Bocchieri, Dimitrios Dimitriadis
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Publication number: 20170244997Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a method for controlling a steering of a plurality of cameras to identify a plurality of potential sources, identifying the plurality of potential sources according to image data provided by the plurality of cameras, assigning a beam of a plurality of beams of a plurality of microphones to each of the plurality of potential sources, detecting a first command comprising one of a first audible cue based on signals from a portion of the plurality of microphones, a first visual cue based on image data from one of the plurality of cameras, or both for controlling a media center, and configuring the media center according to the first command. Other embodiments are disclosed.Type: ApplicationFiled: May 8, 2017Publication date: August 24, 2017Inventors: DIMITRIOS DIMITRIADIS, HORST JUERGEN SCHROETER
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Publication number: 20170236527Abstract: Disclosed herein are systems, methods, and computer-readable storage devices for processing audio signals. An example system configured to practice the method receives audio at a device to be transmitted to a remote speech processing system. The system analyzes one of noise conditions, need for an enhanced speech quality, and network load to yield an analysis. Based on the analysis, the system determines to bypass user-defined options for enhancing audio for speech processing. Then, based on the analysis, the system can modify an audio transmission parameter used to transmit the audio from the device to the remote speech processing system. The audio transmission parameter can be one of an amount of coding, a chosen codec, an amount of coding, or a number of audio channels, for example.Type: ApplicationFiled: May 4, 2017Publication date: August 17, 2017Inventors: Dimitrios DIMITRIADIS, John CROCKETT, Horst Juergen SCHROETER
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Patent number: 9728183Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for combining frame and segment level processing, via temporal pooling, for phonetic classification. A frame processor unit receives an input and extracts the time-dependent features from the input. A plurality of pooling interface units generates a plurality of feature vectors based on pooling the time-dependent features and selecting a plurality of time-dependent features according to a plurality of selection strategies. Next, a plurality of segmental classification units generates scores for the feature vectors. Each segmental classification unit (SCU) can be dedicated to a specific pooling interface unit (PIU) to form a PIU-SCU combination. Multiple PIU-SCU combinations can be further combined to form an ensemble of combinations, and the ensemble can be diversified by varying the pooling operations used by the PIU-SCU combinations.Type: GrantFiled: November 10, 2015Date of Patent: August 8, 2017Assignee: AT&T Intellectual Property I, L.P.Inventors: Sumit Chopra, Dimitrios Dimitriadis, Patrick Haffner
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Patent number: 9678713Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a method for controlling a steering of a plurality of cameras to identify a plurality of potential sources, identifying the plurality of potential sources according to image data provided by the plurality of cameras, assigning a beam of a plurality of beams of a plurality of microphones to each of the plurality of potential sources, detecting a first command comprising one of a first audible cue based on signals from a portion of the plurality of microphones, a first visual cue based on image data from one of the plurality of cameras, or both for controlling a media center, and configuring the media center according to the first command. Other embodiments are disclosed.Type: GrantFiled: October 9, 2012Date of Patent: June 13, 2017Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Dimitrios Dimitriadis, Horst Juergen Schroeter
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Patent number: 9664525Abstract: Concepts and technologies are disclosed herein for providing navigation routes and/or providing navigation route updates. According to various embodiments of the concepts and technologies disclosed herein, a navigation application can be configured to obtain route data from a routing service. The routing service can be configured to use navigation data locally stored and/or obtained from a number of sources to generate navigation routes and/or to update navigation routes. The generated and/or updated navigation routes can be provided to the user device as route data that can be used to provide navigation directions to a user.Type: GrantFiled: August 27, 2014Date of Patent: May 30, 2017Assignee: AT&T Intellectual Property I, L.P.Inventor: Dimitrios Dimitriadis
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Patent number: 9646626Abstract: Disclosed herein are systems, methods, and computer-readable storage devices for processing audio signals. An example system configured to practice the method receives audio at a device to be transmitted to a remote speech processing system. The system analyzes one of noise conditions, need for an enhanced speech quality, and network load to yield an analysis. Based on the analysis, the system determines to bypass user-defined options for enhancing audio for speech processing. Then, based on the analysis, the system can modify an audio transmission parameter used to transmit the audio from the device to the remote speech processing system. The audio transmission parameter can be one of an amount of coding, a chosen codec, an amount of coding, or a number of audio channels, for example.Type: GrantFiled: November 22, 2013Date of Patent: May 9, 2017Assignees: AT&T Intellectual Property I, L.P., AT&T Mobility II LLCInventors: Dimitrios Dimitriadis, John Crockett, Horst Juergen Schroeter
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Patent number: 9570092Abstract: Devices, systems, methods, media, and programs for detecting an emotional state change in an audio signal are provided. A number of segments of the audio signal are analyzed based on separate lexical and acoustic evaluations, and, for each segment, an emotional state and a confidence score of the emotional state are determined. A current emotional state of the audio signal is tracked for each of the number of segments. For a particular segment, it is determined whether the current emotional state of the audio signal changes to another emotional state based on the emotional state and a comparison of the confidence score of the particular segment to a predetermined threshold.Type: GrantFiled: April 26, 2016Date of Patent: February 14, 2017Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Dimitrios Dimitriadis, Mazin E. Gilbert, Taniya Mishra, Horst J. Schroeter
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Patent number: 9558738Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for generating an acoustic model for use in speech recognition. A system configured to practice the method first receives training data and identifies non-contextual lexical-level features in the training data. Then the system infers sentence-level features from the training data and generates a set of decision trees by node-splitting based on the non-contextual lexical-level features and the sentence-level features. The system decorrelates training vectors, based on the training data, for each decision tree in the set of decision trees to approximate full-covariance Gaussian models, and then can train an acoustic model for use in speech recognition based on the training data, the set of decision trees, and the training vectors.Type: GrantFiled: March 8, 2011Date of Patent: January 31, 2017Assignee: AT&T Intellectual Property I, L.P.Inventors: Enrico Bocchieri, Diamantino Antonio Caseiro, Dimitrios Dimitriadis
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Patent number: 9484018Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for building an automatic speech recognition system through an Internet API. A network-based automatic speech recognition server configured to practice the method receives feature streams, transcriptions, and parameter values as inputs from a network client independent of knowledge of internal operations of the server. The server processes the inputs to train an acoustic model and a language model, and transmits the acoustic model and the language model to the network client. The server can also generate a log describing the processing and transmit the log to the client. On the server side, a human expert can intervene to modify how the server processes the inputs. The inputs can include an additional feature stream generated from speech by algorithms in the client's proprietary feature extraction.Type: GrantFiled: November 23, 2010Date of Patent: November 1, 2016Assignee: AT&T Intellectual Property I, L.P.Inventors: Enrico Bocchieri, Dimitrios Dimitriadis, Horst J. Schroeter