Patents by Inventor Rajat Kumar
Rajat Kumar 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: 11086473Abstract: System and method for aiding communication for subjects suffering from paralysis of muscles controlled by peripheral nervous system are disclosed. A method for aiding communication for said subjects includes capturing, from a plurality of sensors, sensor data generated based on an interaction of a subject with an interactive UI. The plurality of sensors includes one or more body-parts movement tracking sensors for tracking motion of body-parts of the subject and one or more physiological signal sensors for monitoring physiological signals generated from the subject during the interaction. A plurality of model parameters indicative of characteristics of the subject related to the interaction are determined based on the sensor data. The navigation at the interactive UI is controlled on the plurality of model parameters.Type: GrantFiled: May 23, 2017Date of Patent: August 10, 2021Assignee: Tata Consultancy Services LimitedInventors: Arpit Vishwakarma, Aniruddha Sinha, Ratnamala Manna, Debatri Chatterjee, Vedraj, Kingshuk Chakravarty, Rajat Kumar Das, Anagha Nikhil Mehrotra, Arpan Pal, Rahul Dasharath Gavas, Anwesha Khasnobish, Abhijit Das
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Patent number: 11076796Abstract: A method and system for determining cognitive load of a person using a modified baseline is provided. The person is asked to perform a series of activities including staying in eye closed rest state and baseline state and performing a trial state. Simultaneously, EEG signal and GSR signal of the person are captured. The EEG signal and the GSR signal are preprocessed and segmented. The EEG and GSR signals are then used to determine a first set and a second set of inactive states from the baseline interval and the rest interval. The most inactive window is then identified out of the first set of inactive states. The most inactive window is determined from the rest interval of the person. The inactive window is used as the modified baseline to measure the cognitive load of the person.Type: GrantFiled: October 6, 2017Date of Patent: August 3, 2021Assignee: TATA CONSULTANCY SERVICES LLCInventors: Rahul Dasharath Gavas, Rajat Kumar Das, Pratyusha Das, Debatri Chatterjee, Aniruddha Sinha
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Publication number: 20210215521Abstract: This disclosure relates to a system and method for measuring average temperature of mixed fluid in an enclosed chamber. Measurement is based on two independent principle as measuring variation in acoustic wave velocity and variation in resistivity that works on a single setup. First principle is based on measuring acoustic wave velocity in a known medium, which is isolated from the surrounding. The system comprises a primary pipe and a secondary pipe, wherein the ends of the pipes reside inside the enclosed chamber. The primary pipe is made out of good conductor of heat and filled with air. Ends of the primary pipe is fitted with a transducers have one transmitter at one end and one receiver at another end. Average temperature of the mixed fluid is measured based on the variations in sound velocity of acoustic wave passed through the primary pipe and resistivity variations of the primary pipe.Type: ApplicationFiled: December 4, 2020Publication date: July 15, 2021Applicant: Tata Consultancy Services LimitedInventors: Arijit SINHARAY, Rajat Kumar DAS, Anwesha KHASNOBISH, Tapas CHAKRAVARTY
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Patent number: 10958509Abstract: A method performed by a server processing computer for a plurality of monitored servers is provided. The method includes receiving a server alarm of a first type in response to one of a first set of server metrics, each of which includes a measure of a first property for the monitored servers, exceeding a first threshold. The method also includes receiving a server alarm of a second type in response to one of a second set of server metrics, each of which includes a measure of a second property for the monitored servers, exceeding a second threshold. The method includes determining a server alarm correlation between the received server alarm of the first type and the received server alarm of the second type, and generating a new server alarm configuration for a server alarm of the first type and/or the second type based on the server alarm correlation.Type: GrantFiled: October 11, 2018Date of Patent: March 23, 2021Assignee: CA, Inc.Inventors: Balavenkata Ajay Kumar Gudipati, Rajat Kumar Mishra, Sheenam Gupta, Tribhuwan Narain Singh Yadav
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Publication number: 20210020186Abstract: The present disclosure relates to an apparatus for decoding an encoded Unified Audio and Speech stream. The apparatus comprises a core decoder for decoding the encoded Unified Audio and Speech stream. The core decoder includes an eSBR unit for extending a bandwidth of an input signal, the eSBR unit including a QMF based harmonic transposer. The QMF based harmonic transposer is configured to process the input signal in the QMF domain, in each of a plurality of synthesis subbands, to extend the bandwidth of the input signal. The QMF based harmonic transposer is configured to operate at least in part based on pre-computed information. The present disclosure further relates to corresponding methods and storage media.Type: ApplicationFiled: December 19, 2018Publication date: January 21, 2021Applicant: Dolby International ABInventors: Rajat KUMAR, Ramesh KATURI, Saketh SATHUVALLI, Reshma RAI
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Publication number: 20210012863Abstract: Temperature measurement is an important part of many potential applications in process industry. Conventional temperature measurement methods require manual intervention for process monitoring and fail to provide accurate and precise measurement of temperature of an enclosed mixed fluid chamber. The present disclosure provides artificial intelligence based temperature measurement in mixed fluid chamber. A plurality of inputs pertaining to the mixed fluid chamber are received to build a fluid based model. The fluid based model is used to generate one or more fluid parameters. The one or more fluid parameters are used along with a ground truth temperature data and the received plurality of inputs for training an artificial intelligence (AI) based model. However, the AI based model is trained with and without knowledge of fluid flow. The trained AI based model is further used to accurately estimate temperature of the mixed fluid chamber for a plurality of test input data.Type: ApplicationFiled: July 8, 2020Publication date: January 14, 2021Applicant: Tata Consultancy Services LimitedInventors: Rajat Kumar DAS, Arijit SINHARAY, Arijit CHOWDHURY, Tapas CHAKRAVARTY, Arpan PAL
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Publication number: 20210005212Abstract: The present disclosure relates to an apparatus for decoding an encoded Unified Audio and Speech stream. The apparatus comprises a core decoder for decoding the encoded Unified Audio and Speech stream. The core decoder includes a fast Fourier transform, FFT, module implementation based on a Cooley-Tuckey algorithm. The FFT module is configured to determine a discrete Fourier transform, DFT. Determining the DFT involves recursively breaking down the DFT into small FFTs based on the Cooley-Tucker algorithm and using radix-4 if a number of points of the FFT is a power of 4 and using mixed radix if the number is not a power of 4. Performing the small FFTs involves applying twiddle factors. Applying the twiddle factors involves referring to pre-computed values for the twiddle factors.Type: ApplicationFiled: December 19, 2018Publication date: January 7, 2021Applicant: Dolby International ABInventors: Rajat KUMAR, Ramesh KATURI, Saketh SATHUVALLI, Reshma RAI
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Patent number: 10871468Abstract: This disclosure relates to non-contact inspection of material for identifying and estimate composition of a material under inspection. Traditionally, material inspection is an invasive process involving contact based approaches. A radar-based approach requires placement of the radar at a specific location, which is a challenge since amplitude of the reflected signal, depends on the distance from the material under inspection. The present disclosure addresses this technical problem by providing a Continuous Wave radar-based approach that is based on absolute slope at extrema points on the reflected signal from the material under inspection.Type: GrantFiled: March 5, 2019Date of Patent: December 22, 2020Assignee: Tata Consultancy Services LimitedInventors: Rajat Kumar Das, Arijit Sinharay, Smriti Rani, Andrew Gigie, Tapas Chakravarty
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Publication number: 20200380997Abstract: The present disclosure relates to an apparatus for decoding an encoded Unified Audio and Speech stream. The apparatus comprises a core decoder for decoding the encoded Unified Audio and Speech stream. The core decoder includes an upmixing unit adapted to perform mono to stereo upmixing. The upmixing unit includes a decorrelator unit D adapted to apply a decorrelation filter to an input signal. The decorrelator unit is adapted to determine filter coefficients for the decorrelation filter by referring to pre-computed values. The present disclosure further relates to a an apparatus for encoding a Unified Audio and Speech stream, as well as to corresponding methods and storage media.Type: ApplicationFiled: December 19, 2018Publication date: December 3, 2020Applicant: Dolby International ABInventors: Rajat KUMAR, Ramesh KATURI, Saketh SATHUVALLI, Reshma RAI
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Publication number: 20200284895Abstract: This disclosure relates generally to tracking motion of target in indoor environment. The method includes estimating an initial position of the target in a mesh grid form based on radar data captured from radar devices installed in the indoor environment. For a subsequent target movement, a subsequent position of the target is estimated in the mesh grid form based on the initial position and a resultant velocity vector of the target. A number of outlier grid-points is computed with a threshold number, and based on comparison the outlier grid-points are either replaced with interpolated grid-points or the subsequent position of the target is repaired based on a probable position of the target obtained from at least one of a linear regression based analysis of prior positions of the target, prior knowledge of the target velocity and sampling interval, and a trilateration based technique.Type: ApplicationFiled: January 29, 2020Publication date: September 10, 2020Applicant: Tata Consultancy Services LimitedInventors: Rajat Kumar DAS, Arijit CHOWDHURY, Tapas CHAKRAVARTY, Arpan PAL
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Publication number: 20200141903Abstract: This disclosure relates to non-contact inspection of material for identifying and estimate composition of a material under inspection. Traditionally, material inspection is an invasive process involving contact based approaches. A radar-based approach requires placement of the radar at a specific location, which is a challenge since amplitude of the reflected signal, depends on the distance from the material under inspection. The present disclosure addresses this technical problem by providing a Continuous Wave radar-based approach that is based on absolute slope at extrema points on the reflected signal from the material under inspection.Type: ApplicationFiled: March 5, 2019Publication date: May 7, 2020Applicant: Tata Consultancy Services LimitedInventors: Rajat Kumar DAS, Arijit SINHARAY, Smriti RANI, Andrew GIGIE, Tapas CHAKRAVARTY
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Publication number: 20200129129Abstract: Health signal monitoring using continuous wave microwave signals is often affected by phase wrapping and null point detection issues. The disclosure herein generally relates to health monitoring, and, more particularly, to a method and a monitoring system for health monitoring using Amplitude Modulated Continuous Wave (AMCW) microwave signals. In this design of the monitoring system, the AMCW microwave signal comprises of a carrier signal and a modulating signal. The modulating signal is used for measuring heart rate and breathing rate of a subject, while the carrier signal is used to tune antenna size in the monitoring system. As the probing wavelength and the antenna size are independent of each other in this design of the monitoring system, the probing wavelength can be adjusted such that effect of the phase wrapping can be minimized. The system addresses the null point measurement problem by quadrature modulating the modulating signal.Type: ApplicationFiled: February 25, 2019Publication date: April 30, 2020Applicant: Tata Consultancy Services LimitedInventors: Arijit SINHARAY, Rajat Kumar DAS, Sayan SETH
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Publication number: 20200119978Abstract: A method performed by a server processing computer for a plurality of monitored servers is provided. The method includes receiving a server alarm of a first type in response to one of a first set of server metrics, each of which includes a measure of a first property for the monitored servers, exceeding a first threshold. The method also includes receiving a server alarm of a second type in response to one of a second set of server metrics, each of which includes a measure of a second property for the monitored servers, exceeding a second threshold. The method includes determining a server alarm correlation between the received server alarm of the first type and the received server alarm of the second type, and generating a new server alarm configuration for a server alarm of the first type and/or the second type based on the server alarm correlation.Type: ApplicationFiled: October 11, 2018Publication date: April 16, 2020Applicant: CA, Inc.Inventors: Balavenkata Ajay Kumar Gudipati, Rajat Kumar Mishra, Sheenam Gupta, Tribhuwan Narain Singh Yadav
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Publication number: 20200110815Abstract: Methods of processing alarm messages in a computer network administration system are provided. Methods include receiving a substantially real time alarm message stream that includes alarm messages, converting each alarm message of the alarm messages into an alarm message vector that includes multiple dimensions, generating an alarm message matrix that includes the alarm message vectors, and determining an information gain corresponding to each of the dimensions of the alarm message matrix.Type: ApplicationFiled: October 8, 2018Publication date: April 9, 2020Applicant: CA, Inc.Inventors: Sai Eswar GARAPATI, Deepak KARUNANIDHI, Rajat Kumar MISHRA
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Publication number: 20200112475Abstract: Methods of processing alarm messages in a computer network administration system are provided. Methods include receiving a substantially real time alarm message stream that includes alarm messages. For each alarm message, operations include performing a message preprocessing operation to remove low message content portions, determining message term relevance corresponding to message terms in the alarm message, and converting the message terms into a message vector. Operations further include generating scenarios that represent respective message clusters based on varied similarity distance between given ones of the message vectors.Type: ApplicationFiled: October 8, 2018Publication date: April 9, 2020Applicant: CA, Inc.Inventors: Sai Eswar GARAPATI, Deepak KARUNANIDHI, Rajat Kumar MISHRA
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Publication number: 20200084084Abstract: A method processing alarm messages generated by a computer network administration system includes, for each one alarm message of a plurality of alarm messages, selecting a plurality of n-grams from the one alarm message, assigning each of the plurality of n-grams to a node in a knowledge graph, generating a node weight for each node in the knowledge graph based on a popularity of the n-gram associated with the node, generating an edge weight for each of a plurality of edges connecting nodes in the knowledge graph to each other, and extracting semantic relationships between nodes in the knowledge graph based on the node weights and the edge weights. The alarm messages are grouped into clusters based on the extracted semantic relationships.Type: ApplicationFiled: September 6, 2018Publication date: March 12, 2020Inventors: Deepak Karunanidhi, Sai Eswar Garapati, Rajat Kumar Mishra
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Patent number: 10456071Abstract: The present disclosure envisages a computer implemented system and method to derive a relationship between Elementary Cognitive Tasks (ECTs) and the underlying cognitive skills of individuals through Electroencephalogram (EEG) analysis. The aim is to evaluate or improve the perceptual-cognitive traits of a subject that comprises disintegrating a given task into elementary task that are further mapped to identified cognitive categories of Bloom's Taxonomy, upon which a cluster analysis is performed. The separation index between the clusters thereafter establishes that individuals have different thinking process which is characteristics of that subject.Type: GrantFiled: April 7, 2016Date of Patent: October 29, 2019Assignee: Tata Consultancy Services LimitedInventors: Debatri Chatterjee, Aniruddha Sinha, Rajat Kumar Das, Shreyasi Datta
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Publication number: 20190171348Abstract: System and method for aiding communication for subjects suffering from paralysis of muscles controlled by peripheral nervous system are disclosed. A method for aiding communication for said subjects includes capturing, from a plurality of sensors, sensor data generated based on an interaction of a subject with an interactive UI. The plurality of sensors includes one or more body-parts movement tracking sensors for tracking motion of body-parts of the subject and one or more physiological signal sensors for monitoring physiological signals generated from the subject during the interaction. A plurality of model parameters indicative of characteristics of the subject related to the interaction are determined based on the sensor data. The navigation at the interactive UI is controlled on the plurality of model parameters.Type: ApplicationFiled: May 23, 2017Publication date: June 6, 2019Applicant: Tata Consultancy Services LimitedInventors: Arpit VISHWAKARMA, Aniruddha SINHA, Ratnamala MANNA, Debatri CHATTERJEE, Vedraj VEDRAJ, Kingshuk CHAKRAVARTY, Rajat Kumar DAS, Anagha Nikhil MEHROTRA, Arpan PAL, Rahul Dasharath GAVAS, Anwesha KHASNOBISH, Abhijit DAS
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Publication number: 20180310851Abstract: A method and system is provided for pre-processing of an electroencephalography (EEG) signal for cognitive load measurement. The present application provides a method and system for pre-processing of electroencephalography signal for cognitive load measurement of a user, comprises of capturing the electroencephalography signal from the head of the user, detecting the plurality of system artifacts in the captured electroencephalography signal, detecting and removing noisy window from the captured electroencephalography signal, detecting an eye blink region and filtering out said detected eye blink region from the captured electroencephalography signal, utilizing the filtered electroencephalography signal for measuring the cognitive load of the user and subsequently computing different levels of mental workloads on the user using variation of spatial distribution of frontal scalp EEG electrodes for measured cognitive load.Type: ApplicationFiled: October 4, 2016Publication date: November 1, 2018Applicant: Tata Consultancy Services LimitedInventors: Rajat Kumar DAS, Aniruddha SINHA, Debatri CHATTERJEE, Shreyasi DATTA, Rahul Dasharath GAVAS
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Publication number: 20180307735Abstract: Provided is a process including: receiving a request for a user interface depicting data specified, at least in part, by the request; accessing data in a first type of database, the data in the first type of database including references to entries in a second type of database different from the first type of database, wherein the two types of databases include a relational database and a non-relational database; forming instructions to present a user interface depicting accessed data in the first type of database with inputs to effectuate access to data in the second type of database.Type: ApplicationFiled: April 19, 2017Publication date: October 25, 2018Inventors: Nicholas D. Thayer, James Perkins, Rajat Kumar Mishra, Kiran Prakash Diwakar