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David Cox

14 accepted papers

2024

Self-Specialization: Uncovering Latent Expertise within Large Language Models

ACL 2024findings

Recent works have demonstrated the effectiveness of self-alignment in which a large language model is aligned to follow general instructions using instructional data generated from the model itself starting from a handful of human-written seeds. Instead of general alignment, in this work, we focus o…

2023

ConStruct-VL: Data-Free Continual Structured VL Concepts Learning

CVPR 2023poster

Recently, large-scale pre-trained Vision-and-Language (VL) foundation models have demonstrated remarkable capabilities in many zero-shot downstream tasks, achieving competitive results for recognizing objects defined by as little as short text prompts. However, it has also been shown that VL models…

2022

An Adversarial Framework for Generating Unseen Images by Activation Maximization

AAAI 2022technical

Activation maximization (AM) refers to the task of generating input examples that maximize the activation of a target class of a classifier, which can be used for class-conditional image generation and model interpretation. A popular class of AM method, GAN-based AM, introduces a GAN pre-trained on…

2022

ContentVec: An Improved Self-Supervised Speech Representation by Disentangling Speakers

ICML 2022spotlight

Self-supervised learning in speech involves training a speech representation network on a large-scale unannotated speech corpus, and then applying the learned representations to downstream tasks. Since the majority of the downstream tasks of SSL learning in speech largely focus on the content inform…

2022

VALHALLA: Visual Hallucination for Machine Translation

CVPR 2022poster

Designing better machine translation systems by considering auxiliary inputs such as images has attracted much attention in recent years. While existing methods show promising performance over the conventional text-only translation systems, they typically require paired text and image as input durin…

Cited by 38PDFScholar
2021

Auto-NBA: Efficient and Effective Search Over the Joint Space of Networks, Bitwidths, and Accelerators

ICML 2021spotlight

While maximizing deep neural networks’ (DNNs’) acceleration efficiency requires a joint search/design of three different yet highly coupled aspects, including the networks, bitwidths, and accelerators, the challenges associated with such a joint search have not yet been fully understood and addresse…

2021

Global Prosody Style Transfer Without Text Transcriptions

ICML 2021oral

Prosody plays an important role in characterizing the style of a speaker or an emotion, but most non-parallel voice or emotion style transfer algorithms do not convert any prosody information. Two major components of prosody are pitch and rhythm. Disentangling the prosody information, particularly t…

Cited by 42SourcePDFScholar
2020

Simulating a Primary Visual Cortex at the Front of CNNs Improves Robustness to Image Perturbations

NeurIPS 2020spotlight

Current state-of-the-art object recognition models are largely based on convolutional neural network (CNN) architectures, which are loosely inspired by the primate visual system. However, these CNNs can be fooled by imperceptibly small, explicitly crafted perturbations, and struggle to recognize obj…

2020

Unsupervised Speech Decomposition via Triple Information Bottleneck

ICML 2020poster

Speech information can be roughly decomposed into four components: language content, timbre, pitch, and rhythm. Obtaining disentangled representations of these components is useful in many speech analysis and generation applications. Recently, state-of-the-art voice conversion systems have led to sp…

2019

More Is Less: Learning Efficient Video Representations by Big-Little Network and Depthwise Temporal Aggregation

NeurIPS 2019poster

Current state-of-the-art models for video action recognition are mostly based on expensive 3D ConvNets. This results in a need for large GPU clusters to train and evaluate such architectures. To address this problem, we present an lightweight and memory-friendly architecture for action recognition t…

2019

Self-Supervised Moving Vehicle Tracking With Stereo Sound

ICCV 2019poster

Humans are able to localize objects in the environment using both visual and auditory cues, integrating information from multiple modalities into a common reference frame. We introduce a system that can leverage unlabeled audiovisual data to learn to localize objects (moving vehicles) in a visual re…

Cited by 174PDFScholar
2019

ZO-AdaMM: Zeroth-Order Adaptive Momentum Method for Black-Box Optimization

NeurIPS 2019poster

The adaptive momentum method (AdaMM), which uses past gradients to update descent directions and learning rates simultaneously, has become one of the most popular first-order optimization methods for solving machine learning problems. However, AdaMM is not suited for solving black-box optimization…

2017

Deep Predictive Coding Networks for Video Prediction and Unsupervised Learning

ICLR 2017poster

While great strides have been made in using deep learning algorithms to solve supervised learning tasks, the problem of unsupervised learning - leveraging unlabeled examples to learn about the structure of a domain - remains a difficult unsolved challenge. Here, we explore prediction of future frame…

Cited by 1230SourceScholar