Patents by Inventor Abhijit Das
Abhijit Das 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: 11764785Abstract: A level shifter circuit is provided. In some examples, the level shifter circuit includes a first set of transistors and a second set of transistors coupled between first and second power supply nodes. The control terminals of the first and second lower transistors are coupled to an input node. The level shifter circuit also includes a third set of transistors and a fourth set of transistors coupled between first and third power supply nodes. A control terminal of a third lower transistor is coupled to a second intermediate node, and a control terminal of a fourth lower transistor is coupled to a first intermediate node. Control terminals of the first upper transistor and the fourth upper transistor are coupled to a third intermediate node. Control terminals of the second upper transistor and the third upper transistor are coupled to a fourth intermediate node.Type: GrantFiled: September 1, 2022Date of Patent: September 19, 2023Assignee: Texas Instruments IncorporatedInventor: Abhijit Das
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Publication number: 20230094930Abstract: A level shifter circuit is provided. In some examples, the level shifter circuit includes a first set of transistors and a second set of transistors coupled between first and second power supply nodes. The control terminals of the first and second lower transistors are coupled to an input node. The level shifter circuit also includes a third set of transistors and a fourth set of transistors coupled between first and third power supply nodes. A control terminal of a third lower transistor is coupled to a second intermediate node, and a control terminal of a fourth lower transistor is coupled to a first intermediate node. Control terminals of the first upper transistor and the fourth upper transistor are coupled to a third intermediate node. Control terminals of the second upper transistor and the third upper transistor are coupled to a fourth intermediate node.Type: ApplicationFiled: September 1, 2022Publication date: March 30, 2023Inventor: Abhijit Das
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Patent number: 11596328Abstract: This disclosure relates generally to health monitoring and assessment systems, and more particularly to perform postural stability assessment of a user and quantify the assessed postural stability. In an embodiment, the system, by monitoring specific actions (which are part of certain tests done for the postural stability assessment) being performed by a user, collects inputs which are then processed to determine SLS duration, the body joint vibration, and the body sway area of the user, while performing the tests. By processing the SLS duration, the body joint vibration, and the body sway area together, a postural stability index score for the user is determined, and based on this score, postural stability assessment for the user is performed.Type: GrantFiled: March 7, 2018Date of Patent: March 7, 2023Assignee: Tata Consultancy Services LimitedInventors: Oishee Mazumder, Kingshuk Chakravarty, Debatri Chatterjee, Aniruddha Sinha, Abhijit Das
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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: 11033205Abstract: A method and system is provided for finding and analyzing gait parameters and postural balance of a person using a Kinect system. The system is easy to use and can be installed at home as well as in clinic. The system includes a Kinect sensor, a software development kit (SDK) and a processor. The temporal skeleton information obtained from the Kinect sensor to evaluate gait parameters includes stride length, stride time, stance time and swing time. Eigenvector based curvature detection is used to analyze the gait pattern with different speeds. In another embodiment, Eigenvector based curvature detection is employed to detect static single limb stance (SLS) duration along with gait variables for evaluating body balance.Type: GrantFiled: February 8, 2017Date of Patent: June 15, 2021Assignee: TATA CONSULTANCY SERVICES LIMITEDInventors: Kingshuk Chakravarty, Brojeshwar Bhowmick, Aniruddha Sinha, Abhijit Das
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Patent number: 10980447Abstract: Body joint tracking is applied in various industries and medical field. In body joint tracking, marker less devices plays an important role. However, the marker less devices are facing some challenges in providing optimal tracking due to occlusion, ambiguity, lighting conditions, dynamic objects etc. System and method of the present disclosure provides an optimized body joint tracking. Here, motion data pertaining to a first set of motion frames from a motion sensor are received. Further, the motion data are processed to obtain a plurality of 3 dimensional cylindrical models. Here, every cylindrical model among the plurality of 3 dimensional cylindrical model represents a body segment. The coefficients associated with the plurality of 3 dimensional cylindrical models are initialized to obtain a set of initialized cylindrical models. A set of dynamic coefficients associated with the initialized cylindrical models are utilized to track joint motion trajectories of a set of subsequent frames.Type: GrantFiled: February 28, 2018Date of Patent: April 20, 2021Assignee: Tata Consultancy Limited ServicesInventors: Sanjana Sinha, Brojeshwar Bhowmick, Aniruddha Sinha, Abhijit Das
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Patent number: 10973408Abstract: Disclosed herein is a system that uses an eye tracker for diagnosing and facilitating rehabilitation therapy of a patient suffering from disability. The system creates a human machine interface (HMI) that integrates various low cost biosensors and artificial sensors for conducting rehabilitation therapy. The system combines spinal and supra-spinal feedback of the patient with the operant conditioning to facilitate visuomotor balance therapy (VBT), thereby reducing fall risk in disability survivors. The operant conditioning setup for shaping of visuomotor learning to bring about new behavior or to modify a certain aspect of an existing behavior is used for rehabilitation therapy that includes a behaviour response apparatus, a reward delivery module, a stimulus delivery system, and a behaviour control system. The system can also be extended to the patient's home for providing telerehabilitation therapy.Type: GrantFiled: June 9, 2017Date of Patent: April 13, 2021Assignee: Indian Institute of Technology GandhinagarInventors: Uttama Lahiri, Anirban Dutta, Abhijit Das
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Patent number: 10874341Abstract: System and methods for stimulating the neurovascular system of the cerebral tissue through optimally placed devices, while simultaneously measuring the evoked neuronal and hemodynamic responses, also using optimally placed devices, is disclosed. Systems and methods for iteratively stimulating the neurovascular system and recording neuronal and hemodynamic responses are also disclosed. Further, a method for determining cerebral neurovascular functioning from the combined stimulation and measurement is disclosed, for use in diagnosis of neurovascular disorders.Type: GrantFiled: July 12, 2017Date of Patent: December 29, 2020Assignee: Neurotrix LLCInventors: Shubhajit Roy Chowdhury, Anirban Dutta, Abhijit Das
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Patent number: 10657217Abstract: Aspects of the disclosed technology relate to techniques of latency test in networking system-on-chip design verification. A hardware model of interface circuitry implemented in a reconfigurable hardware modeling device associates arrival time information with messages when the messages are delivered to a hardware model of a circuit design implemented in the reconfigurable hardware modeling device, and associates latency information with the messages when the messages are dispatched by the hardware model of the circuit design. The arrival time information of a particular message and the latency information are determined with respect to a model time reference provided in the reconfigurable hardware modeling device.Type: GrantFiled: October 24, 2017Date of Patent: May 19, 2020Assignee: Mentor Graphics CorporationInventors: Suresh Krishnamurthy, Deepak Kumar Garg, Sudhanshu Jayaswal, Saurabh Khaitan, Sanjay Gupta, John R. Stickley, Russell Elias Vreeland, III, Ronald James Squiers, Abhijit Das, Charles W. Selvidge
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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: 20190159675Abstract: Disclosed herein an improved systems and methods using point-of-care (POC), IoT (Internet of Things) enabled device(s) which captures different bio-signals simultaneously as distinct signals, by targeting same neurovascular substrate. The synchronized streaming of the data for live analysis or recording in the tele neuro-monitoring platform are jointly processed in an Artificial Intelligence (AI) based big-data platform under a closed loop, bi-directional, decision tree based system for brain/neurological function status monitoring (continuously and/or intermittently) leading to online POC diagnosis, severity classification, and prognosis of neurological disorders and neurovascular diseases.Type: ApplicationFiled: April 12, 2017Publication date: May 30, 2019Inventors: Rajib Sengupta, Abhijit Das, Anirban Datta
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Publication number: 20190115109Abstract: Unimaginable are the difficulties faced by patients affected by sensory-motor disabilities while executing day to day activities. The flamboyant progress that has made in other areas of medical science does not translate itself in diagnosing them. Early detection and personalized therapy of these disorders is still out of reach. Present disclosure provides systems and methods for optimizing a joint cost function and detecting neuro muscular profiles (e.g., state of user under observation) thereof by implementing a model that quantifies these disorders in terms of a cost functional, which captures the trade-off between the torques applied and the velocities experienced at the joints. Estimation of this cost functional, otherwise known as Inverse optimal control was then carried out using an optimization procedure.Type: ApplicationFiled: October 12, 2018Publication date: April 18, 2019Applicant: Tata Consultancy Services LimitedInventors: Midhun PARAKKAL UNNI, Aniruddha SINHA, Kingshuk CHAKRAVARTY, Debatri CHATTERJEE, Abhijit DAS
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Patent number: 10183852Abstract: A hydraulic control system that uses system pressure information and a rescaled operator input to command valve spool area to control actuator speed. The system uses soft sealing and/or soft pressure compensation.Type: GrantFiled: June 15, 2016Date of Patent: January 22, 2019Assignee: Danfoss Power Solutions GMBH & CO OHGInventors: Abhijit Das, Lee Mahlum, Luke Wadsley, Richard Hitchcock, Jeffrey A. Sipila, Larry Joachim
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Publication number: 20190008421Abstract: Body joint tracking is applied in various industries and medical field. In body joint tracking, marker less devices plays an important role. However, the marker less devices are facing some challenges in providing optimal tracking due to occlusion, ambiguity, lighting conditions, dynamic objects etc. System and method of the present disclosure provides an optimized body joint tracking. Here, motion data pertaining to a first set of motion frames from a motion sensor are received. Further, the motion data are processed to obtain a plurality of 3 dimensional cylindrical models. Here, every cylindrical model among the plurality of 3 dimensional cylindrical model represents a body segment. The coefficients associated with the plurality of 3 dimensional cylindrical models are initialized to obtain a set of initialized cylindrical models. A set of dynamic coefficients associated with the initialized cylindrical models are utilized to track joint motion trajectories of a set of subsequent frames.Type: ApplicationFiled: February 28, 2018Publication date: January 10, 2019Applicant: Tata Consultancy Services LimitedInventors: Sanjana Sinha, Brojeshwar Bhowmick, Aniruddha Sinha, Abhijit Das
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Publication number: 20190008417Abstract: This disclosure relates generally to health monitoring and assessment systems, and more particularly to perform postural stability assessment of a user and quantify the assessed postural stability. In an embodiment, the system, by monitoring specific actions (which are part of certain tests done for the postural stability assessment) being performed by a user, collects inputs which are then processed to determine SLS duration, the body joint vibration, and the body sway area of the user, while performing the tests. By processing the SLS duration, the body joint vibration, and the body sway area together, a postural stability index score for the user is determined, and based on this score, postural stability assessment for the user is performed.Type: ApplicationFiled: March 7, 2018Publication date: January 10, 2019Applicant: Tata Consultancy Services LimitedInventors: Oishee MAZUMDER, Kingshuk CHAKRAVARTY, Debatri CHATTERJEE, Aniruddha SINHA, Abhijit DAS
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Patent number: 10068333Abstract: Systems and methods for identifying body joint location includes obtaining skeletal data, depth data and red, green, and blue (RGB) data pertaining to a user, obtaining, using input data, an estimate of body joint locations (BJLs) and body segment lengths (BSLs), iteratively identifying, based on the depth data and RGB data, probable correct BJLs in a bounded neighborhood around BJLs that are previously obtained, comparing a body segment length associated with the probable correct BJLs and a reference length, identifying candidate BJLs based on comparison, determining a physical orientation of each body segment by segmenting three dimensional (3D) coordinates of each body segment based on the depth data and performing an analysis on each segmented 3D coordinate. A corrected BJL is identified based on a minimal deviation in direction from the physical orientation of a corresponding body segment along with a feature descriptor of the RGB data and depth data.Type: GrantFiled: March 22, 2017Date of Patent: September 4, 2018Assignee: Tata Consultancy Services LimitedInventors: Sanjana Sinha, Brojeshwar Bhowmick, Kingshuk Chakravarty, Aniruddha Sinha, Abhijit Das
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Patent number: 10044614Abstract: A system and method for providing multi-processor data plane architecture have been provided. The method comprises selecting several processing units for performing an egress data process and an ingress data process. A number of processing units are selected for performing an egress data process based on a type of switch and data rate. Several processing pipes are provided for each processing unit. Each processing pipe is divided into several processing stages based on a number of lookup tables used in the egress data process and the ingress data process to absorb a response time of a memory device. The data is stored in several databases in each processing unit, and the databases are copied into several banks to increase an access time with a storage device, such as DDR-SDRAM. Several headers are resynchronized using a fixed delay time through an ACL unit.Type: GrantFiled: March 26, 2015Date of Patent: August 7, 2018Assignee: TEJAS NETWORKS LIMITEDInventors: Vinayak Bhat, Likhit Kulkarni, Anuj Kumar Srivastava, Sachin Kashyap, Abhijit Das, Ravishankar Kumaraswamy
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Publication number: 20180113970Abstract: Aspects of the disclosed technology relate to techniques of latency test in networking system-on-chip design verification. A hardware model of interface circuitry implemented in a reconfigurable hardware modeling device associates arrival time information with messages when the messages are delivered to a hardware model of a circuit design implemented in the reconfigurable hardware modeling device, and associates latency information with the messages when the messages are dispatched by the hardware model of the circuit design. The arrival time information of a particular message and the latency information are determined with respect to a model time reference provided in the reconfigurable hardware modeling device.Type: ApplicationFiled: October 24, 2017Publication date: April 26, 2018Inventors: Krishnamurthy Suresh, Deepak Kumar Garg, Sudhanshu Jayaswal, Saurabh Khaitan, Sanjay Gupta, John R. Stickley, Russell Elias Vreeland, III, Ronald James Squiers, Abhijit Das, Charles W. Selvidge
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Publication number: 20180085045Abstract: A method and system for determining postural balance of the person is provided. The disclosure provides a single limb stance body balance analysis system which will aid medical practitioners to analyze crucial factor for fall risk minimization, injury prevention, fitness and rehabilitation. Skeleton data was captured using Kinect. Two parameters vibration-jitter and force per unit mass (FPUM) are derived for each body part to assess postural stability during SLS. Further, the vibration and force imposed on each joint a first balance score was quantified. A first balance score and a second balance are also calculated by combining vibration index and SLS duration to indicate the postural balance of the person. The vibration index is computed from the vibration profile associated different body segments.Type: ApplicationFiled: March 22, 2017Publication date: March 29, 2018Applicant: Tata Consultancy Services LimitedInventors: Kingshuk CHAKRAVARTY, Aniruddha SINHA, Brojeshwar BHOWMICK, Sanjana SINHA, Abhijit DAS
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Patent number: D900865Type: GrantFiled: September 26, 2018Date of Patent: November 3, 2020Assignee: FUJIFILM SONOSITE, INC.Inventors: David Knapp, Abhijit Das