公开(公告)号：US11051741B2

公开(公告)日：2021-07-06

申请号：US16557904

申请日：2019-08-30

Applicant: Tata Consultancy Services Limited

Inventor： Rohan Banerjee ,  Sakyajit Bhattacharya ,  Soma Bandyopadhyay ,  Aniruddha Sinha

IPC: A61B5/025 ,  A61B5/316 ,  A61B5/024 ,  A61B5/25 ,  A61B5/00 ,  A61B5/021

Abstract: Electrocardiography (ECG) signals contain important markers for Coronary Heart Disease (CHD). State of the art systems and methods rely on clinically available multi-lead ECG for CHD classification which is not cost effective. Moreover the state of the art methods are applied on digital ECG time series data only. Also, discriminative HRV markers are not often present in short ECG recordings necessitating long hours of ECG data to analyze. In accordance with the present disclosure, systems and methods described hereinafter extract ECG time series from ECG images obtained from commercially available low-cost single lead ECG devices through a combination of image and signal processing steps including Histogram analysis, Morphological operation-thinning, Extraction of lines, Extraction of Reference Pulse, Extraction of ECG and interpolating missing data. Further, domain independent statistical features such as self-similarity of raw ECG time series and average Maharaj's distance along with domain specific features are used for classifying CHD.

公开(公告)号：US10548533B2

公开(公告)日：2020-02-04

申请号：US15456112

申请日：2017-03-10

Applicant: TATA CONSULTANCY SERVICES LIMITED

Inventor： Arijit Ukil ,  Soma Bandyopadhyay ,  Chetanya Puri ,  Arpan Pal ,  Kayapanda Mandana

IPC: A61B5/00 ,  G16H50/20 ,  G16H50/30 ,  A61B5/024

Abstract: A method and system for removing corruption in photoplethysmogram (PPG) signals for monitoring cardiac health of patients is provided. The method is performed by extracting photoplethysmogram signals from the patient, detecting and eliminating corruption caused by larger and transient disturbances in the extracted photoplethysmogram signals, segmenting photoplethysmogram signals post detection and elimination of corruption caused by larger and transient disturbances, identifying of inconsistent segments from the segmented photoplethysmogram signals, detecting anomalies from the identified inconsistent segments of the photoplethysmogram signals, analysing the detected anomalies of the photoplethysmogram signals and identifying photoplethysmogram signal segments corrupted by smaller and prolonged disturbances.

公开(公告)号：US20190050673A1

公开(公告)日：2019-02-14

申请号：US16102069

申请日：2018-08-13

Applicant: Tata Consultancy Services Limited

Inventor： Arijit UKIL ,  Soma Bandyopadhyay ,  Chetanya Puri ,  Rituraj Singh ,  Arpan Pal

IPC: G06K9/62 ,  G06N7/08 ,  A61B5/0205 ,  A61B5/1455

Abstract: In many real-life applications, ample amount of examples from one class are present while examples from other classes are rare for training and learning purposes leading to class imbalance problem and misclassification. Methods and systems of the present disclosure facilitate generation of an extended synthetic rare class super dataset that is further pruned to obtain a synthetic rare class dataset by maximizing similarity and diversity in the synthetic rare class dataset while preserving morphological identity with labeled rare class training dataset. Oversampling methods used in the art result in cloning of datasets and do not provide the needed diversity. The methods of the present disclosure can be applied to classification of noisy phonocardiogram (PCG) signals among other applications.

公开(公告)号：US10172528B2

公开(公告)日：2019-01-08

申请号：US15467789

申请日：2017-03-23

Applicant: Tata Consultancy Services Limited

Inventor： Soma Bandyopadhyay ,  Arijit Ukil ,  Chetanya Puri ,  Rituraj Singh ,  Arpan Pal ,  C A Murthy ,  Kayapanda Mandana

IPC: A61B5/04 ,  A61B5/024 ,  A61B5/00 ,  A61B5/0245 ,  A61B5/0402 ,  A61B5/0456 ,  A61B5/046 ,  A61B5/0468 ,  A61B5/021

Abstract: This disclosure relates generally to biomedical signal processing, and more particularly to method and system for physiological parameter derivation from pulsating signals with reduced error. In this method, pulsating signals are extracted, spurious perturbations in the extracted pulsating signals are removed for smoothening, local minima points in the smoothened pulsating signal are derived, systolic maxima point between two derived local minima are derived, most probable pulse duration and most probable peak-to-peak distance are derived, dicrotic minima is removed while ensuring that every dicrotic minima is preceded by a systolic maxima point and followed by a beat start point of said systolic maxima, diastolic peak is derived while ensuring that every dicrotic maxima is preceded by a diastolic notch followed by next beat start point of that maxima, and physiological parameters are derived from the derived local minima points, systolic maxima points, dicrotic notch and diastolic peak.

公开(公告)号：US09978392B2

公开(公告)日：2018-05-22

申请号：US15456172

申请日：2017-03-10

Applicant: Tata Consultancy Services Limited

Inventor： Arijit Ukil ,  Soma Bandyopadhyay ,  Chetanya Puri ,  Arpan Pal ,  Rituraj Singh ,  Ayan Mukherjee ,  Debayan Mukherjee

IPC: G10L25/84 ,  G10L25/78 ,  G10L25/93 ,  G10L21/0232 ,  G10L15/06 ,  G10L15/02

CPC classification number: G10L21/0232 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7267 ,  A61B7/00 ,  G06K9/00496 ,  G10L15/02 ,  G10L15/063 ,  G10L25/84 ,  G10L2025/786 ,  G10L2025/935

Abstract: Traditionally known classification methods of non-stationary physiological audio signals as noisy and clean involve human intervention, may involve dependency on particular type of classifier and further analyses is carried out on classified clean signals. However, in non-stationary audio signals a major portion may end up being classified as noisy and hence may get rejected which may cause missing of intelligence which could have been derived from lightly noisy audio signals that may be critical. The present disclosure enables automation of classification based on auto-thresholding and statistical isolation wherein noisy signals are further classified as highly noisy and lightly noisy through continuous dynamic learning.

公开(公告)号：US09825815B2

公开(公告)日：2017-11-21

申请号：US14838736

申请日：2015-08-28

Applicant: Tata Consultancy Services Limited

Inventor： Soma Bandyopadhyay ,  Shameemraj M Nadaf

IPC: H04L12/24 ,  H04L12/709 ,  H04L12/721 ,  H04L12/26

CPC classification number: H04L41/0896 ,  H04L43/0864 ,  H04L45/245 ,  H04L45/70

Abstract: The present invention provides a system and method for aggregating and estimating the bandwidth of the multiple network interfaces. Particularly, the invention provides a cross layer system for bandwidth aggregation based on dynamic analysis of network conditions. Further, the invention provides a system and method of estimation for evaluating bandwidth of multiple physical interfaces.

公开(公告)号：US09641635B2

公开(公告)日：2017-05-02

申请号：US14422247

申请日：2013-08-22

Applicant: Tata Consultancy Services Limited

Inventor： Soma Bandyopadhyay ,  Abhijan Bhattacharyya

IPC: G06F15/16 ,  H04L29/08 ,  H04L12/26

CPC classification number: H04L67/26 ,  H04L43/0805

Abstract: A system and method for dynamic selection of reliability by data publishing protocol while publishing data, comprising a constrained gateway device (102) being adapted to publish data by using a data publisher and adapted to send and receive acknowledgment messages, one or more subscriber devices (104) communicatively coupled with the constrained gateway device (102) and subscribed to the server (106) and adapted to send and receive acknowledgment messages, and a server (106) communicatively coupled with the constrained gateway device (102) and the one or more subscriber devices (104) and adapted to exchange the acknowledgement messages between the data publisher on the constrained gateway device (102) and the one or more subscriber devices (104) wherein the data publisher running on the constrained gateway device (102) has multiple reliability levels for publishing data and is adapted to dynamically select the reliability level based on available bandwidth and energy.

公开(公告)号：US20150195368A1

公开(公告)日：2015-07-09

申请号：US14422247

申请日：2013-08-22

Applicant: Tata Consultancy Services Limited

Inventor： Soma Bandyopadhyay ,  Abhijan Bhattacharyya

IPC: H04L29/08 ,  H04L12/26

CPC classification number: H04L67/26 ,  H04L43/0805

Abstract: A system and method for dynamic selection of reliability by data publishing protocol while publishing data, comprising a constrained gateway device (102) being adapted to publish data by using a data publisher and adapted to send and receive acknowledgment messages, one or more subscriber devices (104) communicatively coupled with the constrained gateway device (102) and subscribed to the server (106) and adapted to send and receive acknowledgment messages, and a server (106) communicatively coupled with the constrained gateway device (102) and the one or more subscriber devices (104) and adapted to exchange the acknowledgement messages between the data publisher on the constrained gateway device (102) and the one or more subscriber devices (104) wherein the data publisher running on the constrained gateway device (102) has multiple reliability levels for publishing data and is adapted to dynamically select the reliability level based on available bandwidth and energy.

Abstract translation: 一种用于在发布数据时通过数据发布协议动态选择可靠性的系统和方法，包括：受限网关设备（102），其适于通过使用数据发布者发布数据并适于发送和接收确认消息，一个或多个订户设备 104），其与所述受限网关设备（102）通信地耦合并且订阅所述服务器（106）并且适于发送和接收确认消息;以及服务器（106），其与所述约束网关设备（102）和所述一个或多个通信设备 用户设备（104）并且适于在所述受限网关设备（102）与所述一个或多个订户设备（104）之间的所述数据发布者之间交换所述确认消息，其中，所述约束网关设备（102）上运行的数据发布者具有多个可靠性 用于发布数据的级别，并适应于基于可用带宽和能量动态选择可靠性级别。

公开(公告)号：US20140376384A1

公开(公告)日：2014-12-25

申请号：US14310169

申请日：2014-06-20

Applicant: Tata Consultancy Services Limited

Inventor： Soma Bandyopadhyay ,  Abhijan Bhattacharyya ,  Arpan Pal

IPC: H04W24/02 ,  H04W84/18

CPC classification number: H04W24/02 ,  H04Q9/02 ,  H04Q2213/092 ,  H04Q2213/166 ,  H04Q2213/332 ,  H04W84/18

Abstract: A system and method for resource utilization in a constrained sensor gateway for transfer of data in terms of the bandwidth and energy available to transfer data. The system includes a processor in communication with the constrained sensor gateway, which includes an application layer protocol and which is in communication with a communication network, and a memory coupled to the processor. The memory includes a network condition detection module configured to detect a network condition of the constrained sensor gateway, and an adaption module configured to determine a reliability score. The application layer protocol of the constrained sensor gateway adapts a reliability level based on the reliability score determined by the adaption module, which enables better utilization of the bandwidth and energy to transfer data. The reliability level may pertain to a reliable mode, or a non-reliable mode of communication for transferring data.

Abstract translation: 用于在受限传感器网关中资源利用的系统和方法，用于在传输数据的可用带宽和能量方面传输数据。 该系统包括与受限传感器网关通信的处理器，其包括应用层协议并且与通信网络通信，以及耦合到处理器的存储器。 存储器包括被配置为检测受限传感器网关的网络状况的网络条件检测模块，以及被配置为确定可靠性分数的适配模块。 受限传感器网关的应用层协议基于由适配模块确定的可靠性分数来适应可靠性水平，从而更好地利用带宽和能量来传输数据。 可靠性级别可能涉及可靠模式或用于传送数据的不可靠的通信模式。