Search Results for author: Ankit Shah

Found 39 papers, 7 papers with code

An Approach for Self-Training Audio Event Detectors Using Web Data

no code implementations20 Sep 2016 Benjamin Elizalde, Ankit Shah, Siddharth Dalmia, Min Hun Lee, Rohan Badlani, Anurag Kumar, Bhiksha Raj, Ian Lane

The audio event detectors are trained on the labeled audio and ran on the unlabeled audio downloaded from YouTube.

Event Detection

Framework for evaluation of sound event detection in web videos

no code implementations2 Nov 2017 Rohan Badlani, Ankit Shah, Benjamin Elizalde, Anurag Kumar, Bhiksha Raj

The framework crawls videos using search queries corresponding to 78 sound event labels drawn from three datasets.

Event Detection Sound Event Detection

A Closer Look at Weak Label Learning for Audio Events

1 code implementation24 Apr 2018 Ankit Shah, Anurag Kumar, Alexander G. Hauptmann, Bhiksha Raj

In this work, we first describe a CNN based approach for weakly supervised training of audio events.

Audio Classification Event Detection +2

Natural Language Person Search Using Deep Reinforcement Learning

no code implementations2 Sep 2018 Ankit Shah, Tyler Vuong

Deep Reinforcement learning with appropriate constraints would look only for the relevant person in the image as opposed to an unconstrained approach where each individual objects in the image are ranked.

object-detection Object Detection +4

CADP: A Novel Dataset for CCTV Traffic Camera based Accident Analysis

1 code implementation16 Sep 2018 Ankit Shah, Jean Baptiste Lamare, Tuan Nguyen Anh, Alexander Hauptmann

Our experiments indicate a considerable improvement in object detection accuracy: +8. 51% for CM and +6. 20% for ACM.

Object object-detection +2

Two Can Play That Game: An Adversarial Evaluation of a Cyber-alert Inspection System

no code implementations13 Oct 2018 Ankit Shah, Arunesh Sinha, Rajesh Ganesan, Sushil Jajodia, Hasan Cam

In order to explain this observation, we extend the earlier RL model to a game model and show that there exists defender policies that can be robust against any adversarial policy.

Reinforcement Learning (RL)

Bayesian Inference of Temporal Task Specifications from Demonstrations

no code implementations NeurIPS 2018 Ankit Shah, Pritish Kamath, Julie A. Shah, Shen Li

When observing task demonstrations, human apprentices are able to identify whether a given task is executed correctly long before they gain expertise in actually performing that task.

Probabilistic Programming

Sound event detection in domestic environments withweakly labeled data and soundscape synthesis

1 code implementation26 Oct 2019 Nicolas Turpault, Romain Serizel, Ankit Shah, Justin Salamon

This paper presents Task 4 of the Detection and Classification of Acoustic Scenes and Events (DCASE) 2019 challenge and provides a first analysis of the challenge results.

Event Detection Sound Event Detection

Sampling Prediction-Matching Examples in Neural Networks: A Probabilistic Programming Approach

no code implementations9 Jan 2020 Serena Booth, Ankit Shah, Yilun Zhou, Julie Shah

In this paper, we consider the problem of exploring the prediction level sets of a classifier using probabilistic programming.

General Classification Probabilistic Programming

Bayes-TrEx: a Bayesian Sampling Approach to Model Transparency by Example

1 code implementation19 Feb 2020 Serena Booth, Yilun Zhou, Ankit Shah, Julie Shah

To address these challenges, we introduce a flexible model inspection framework: Bayes-TrEx.

Domain Adaptation

Interactive Robot Training for Non-Markov Tasks

no code implementations4 Mar 2020 Ankit Shah, Samir Wadhwania, Julie Shah

Defining sound and complete specifications for robots using formal languages is challenging, while learning formal specifications directly from demonstrations can lead to over-constrained task policies.

Active Learning

A Reinforcement Learning Approach for Rebalancing Electric Vehicle Sharing Systems

1 code implementation5 Oct 2020 Aigerim Bogyrbayeva, Sungwook Jang, Ankit Shah, Young Jae Jang, Changhyun Kwon

This paper proposes a reinforcement learning approach for nightly offline rebalancing operations in free-floating electric vehicle sharing systems (FFEVSS).

reinforcement-learning Reinforcement Learning (RL)

Training image classifiers using Semi-Weak Label Data

no code implementations19 Mar 2021 Anxiang Zhang, Ankit Shah, Bhiksha Raj

Thus, this paper introduces a novel semi-weak label learning paradigm as a middle ground to mitigate the problem.

Multiple Instance Learning

Supervised Bayesian Specification Inference from Demonstrations

no code implementations6 Jul 2021 Ankit Shah, Pritish Kamath, Shen Li, Patrick Craven, Kevin Landers, Kevin Oden, Julie Shah

When observing task demonstrations, human apprentices are able to identify whether a given task is executed correctly long before they gain expertise in actually performing that task.

Probabilistic Programming

An Overview of Techniques for Biomarker Discovery in Voice Signal

no code implementations10 Oct 2021 Rita Singh, Ankit Shah, Hira Dhamyal

This paper reflects on the effect of several categories of medical conditions on human voice, focusing on those that may be hypothesized to have effects on voice, but for which the changes themselves may be subtle enough to have eluded observation in standard analytical examinations of the voice signal.

Ontological Learning from Weak Labels

no code implementations4 Mar 2022 Larry Tang, Po Hao Chou, Yi Yu Zheng, Ziqian Ge, Ankit Shah, Bhiksha Raj

We find that the baseline Siamese does not perform better by incorporating ontology information in the weak and multi-label scenario, but that the GCN does capture the ontology knowledge better for weak, multi-labeled data.

Financial Time Series Data Augmentation with Generative Adversarial Networks and Extended Intertemporal Return Plots

no code implementations18 May 2022 Justin Hellermann, Qinzhuan Qian, Ankit Shah

Data augmentation is a key regularization method to support the forecast and classification performance of highly parameterized models in computer vision.

Data Augmentation Time Series +1

Temporal Logic Imitation: Learning Plan-Satisficing Motion Policies from Demonstrations

no code implementations9 Jun 2022 Yanwei Wang, Nadia Figueroa, Shen Li, Ankit Shah, Julie Shah

In this work, we identify the roots of this challenge as the failure of a learned continuous policy to satisfy the discrete plan implicit in the demonstration.

Imitation Learning

Automated Audio Captioning and Language-Based Audio Retrieval

1 code implementation8 Jul 2022 Clive Gomes, Hyejin Park, Patrick Kollman, Yi Song, Iffanice Houndayi, Ankit Shah

This project involved participation in the DCASE 2022 Competition (Task 6) which had two subtasks: (1) Automated Audio Captioning and (2) Language-Based Audio Retrieval.

Audio captioning Retrieval

Deep VULMAN: A Deep Reinforcement Learning-Enabled Cyber Vulnerability Management Framework

no code implementations3 Aug 2022 Soumyadeep Hore, Ankit Shah, Nathaniel D. Bastian

The current approaches are deterministic and one-time decision-making methods, which do not consider future uncertainties when prioritizing and selecting vulnerabilities for mitigation.

Decision Making Management +2

Conformers are All You Need for Visual Speech Recognition

no code implementations17 Feb 2023 Oscar Chang, Hank Liao, Dmitriy Serdyuk, Ankit Shah, Olivier Siohan

We achieve a new state-of-the-art of 12. 8% WER for visual speech recognition on the TED LRS3 dataset, which rivals the performance of audio-only models from just four years ago.

speech-recognition Visual Speech Recognition

Grounding Complex Natural Language Commands for Temporal Tasks in Unseen Environments

no code implementations22 Feb 2023 Jason Xinyu Liu, ZiYi Yang, Ifrah Idrees, Sam Liang, Benjamin Schornstein, Stefanie Tellex, Ankit Shah

We propose Lang2LTL, a modular system and a software package that leverages large language models (LLMs) to ground temporal navigational commands to LTL specifications in environments without prior language data.

Approach to Learning Generalized Audio Representation Through Batch Embedding Covariance Regularization and Constant-Q Transforms

no code implementations7 Mar 2023 Ankit Shah, Shuyi Chen, Kejun Zhou, Yue Chen, Bhiksha Raj

Preliminary results show (1) the proposed BECR can incur a more dispersed embedding on the test set, (2) BECR improves the PaSST model without extra computation complexity, and (3) STFT preprocessing outperforms CQT in all tasks we tested.

Zero-Shot Learning

Exploiting Contextual Structure to Generate Useful Auxiliary Tasks

no code implementations9 Mar 2023 Benedict Quartey, Ankit Shah, George Konidaris

We propose an approach that maximizes experience reuse while learning to solve a given task by generating and simultaneously learning useful auxiliary tasks.

counterfactual Counterfactual Reasoning +2

Improving Perceptual Quality, Intelligibility, and Acoustics on VoIP Platforms

no code implementations16 Mar 2023 Joseph Konan, Ojas Bhargave, Shikhar Agnihotri, Hojeong Lee, Ankit Shah, Shuo Han, Yunyang Zeng, Amanda Shu, Haohui Liu, Xuankai Chang, Hamza Khalid, Minseon Gwak, Kawon Lee, Minjeong Kim, Bhiksha Raj

In this paper, we present a method for fine-tuning models trained on the Deep Noise Suppression (DNS) 2020 Challenge to improve their performance on Voice over Internet Protocol (VoIP) applications.

Multi-Task Learning Speech Enhancement +2

Deep PackGen: A Deep Reinforcement Learning Framework for Adversarial Network Packet Generation

no code implementations18 May 2023 Soumyadeep Hore, Jalal Ghadermazi, Diwas Paudel, Ankit Shah, Tapas K. Das, Nathaniel D. Bastian

The knowledge gained from our study on the adversary's ability to make specific evasive perturbations to different types of malicious packets can help defenders enhance the robustness of their NIDS against evolving adversarial attacks.

Network Intrusion Detection reinforcement-learning

Plug in the Safety Chip: Enforcing Constraints for LLM-driven Robot Agents

no code implementations18 Sep 2023 ZiYi Yang, Shreyas S. Raman, Ankit Shah, Stefanie Tellex

Recent advancements in large language models (LLMs) have enabled a new research domain, LLM agents, for solving robotics and planning tasks by leveraging the world knowledge and general reasoning abilities of LLMs obtained during pretraining.

World Knowledge

Importance of negative sampling in weak label learning

no code implementations23 Sep 2023 Ankit Shah, Fuyu Tang, Zelin Ye, Rita Singh, Bhiksha Raj

Weak-label learning is a challenging task that requires learning from data "bags" containing positive and negative instances, but only the bag labels are known.

Online Active Learning For Sound Event Detection

no code implementations25 Sep 2023 Mark Lindsey, Ankit Shah, Francis Kubala, Richard M. Stern

Online Active Learning (OAL) is a paradigm that addresses this issue by simultaneously minimizing the amount of annotation required to train a classifier and adapting to changes in the data over the duration of the data collection process.

Active Learning Event Detection +1

Understanding and Mitigating the Label Noise in Pre-training on Downstream Tasks

no code implementations29 Sep 2023 Hao Chen, Jindong Wang, Ankit Shah, Ran Tao, Hongxin Wei, Xing Xie, Masashi Sugiyama, Bhiksha Raj

This paper aims to understand the nature of noise in pre-training datasets and to mitigate its impact on downstream tasks.

Psychoacoustic Challenges Of Speech Enhancement On VoIP Platforms

no code implementations11 Oct 2023 Joseph Konan, Ojas Bhargave, Shikhar Agnihotri, Shuo Han, Yunyang Zeng, Ankit Shah, Bhiksha Raj

Within the ambit of VoIP (Voice over Internet Protocol) telecommunications, the complexities introduced by acoustic transformations merit rigorous analysis.

Benchmarking Denoising +1

A Multi-Agent Reinforcement Learning Framework for Evaluating the U.S. Ending the HIV Epidemic Plan

no code implementations1 Nov 2023 Dinesh Sharma, Ankit Shah, Chaitra Gopalappa

Human immunodeficiency virus (HIV) is a major public health concern in the United States, with about 1. 2 million people living with HIV and 35, 000 newly infected each year.

Multi-agent Reinforcement Learning

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