Portrait of Ariel Ephrat

Ariel Ephrat

Research Scientist, Google DeepMind

01

About Me

I'm a Research Scientist at Google DeepMind, previously on the Perception Team at Google Research, where I focus on turning generative AI and video understanding into real-world applications.

My work combines academic research with practical impact, contributing to Google's large-scale generative video models: Genie, Veo, and Lumiere, as well as product features such as Best Take and Speech Mode for Pixel and YouTube Shorts AI effects, alongside notable papers. I completed my PhD in 2018, working with Prof. Shmuel Peleg as part of the HUJI Machine Perception Group.

I'm also drawn to the business side of tech. I've advised Warburg Pincus on computer vision investments, helping drive two deals, and bring perspective from my time as a startup founder. My passion lies in how innovation and value creation come together.

02

Research & Product Highlights

03

Publications

TokenVerse multi-concept personalization visual

TokenVerse: Versatile Multi-concept Personalization in Token Modulation Space

D. Garibi, S. Yadin, R. Paiss, O. Tov, S. Zada, A. Ephrat, T. Michaeli, I. Mosseri, T. Dekel

SIGGRAPH (Journal) 2025 Best Paper Award
Still-Moving customized video generation visual

Still-Moving: Customized Video Generation without Customized Video Data

H. Chefer, S. Zada, R. Paiss, A. Ephrat, O. Tov, M. Rubinstein, L. Wolf, T. Dekel, T. Michaeli, I. Mosseri

SIGGRAPH Asia (Journal) 2024
Lumiere space-time diffusion video generation

Lumiere: A Space-Time Diffusion Model for Video Generation

O. Bar-Tal, H. Chefer, O. Tov, C. Herrmann, R. Paiss, S. Zada, A. Ephrat, J. Hur, Y. Li, T. Michaeli, O. Wang, D. Sun, T. Dekel, I. Mosseri

SIGGRAPH Asia 2024
Teaching CLIP to Count to Ten diagram

Teaching CLIP to Count to Ten

R. Paiss, A. Ephrat, O. Tov, S. Zada, I. Mosseri, M. Irani, T. Dekel

ICCV 2023
SpeedNet learning speediness in videos

SpeedNet: Learning the Speediness in Videos

S. Benaim, A. Ephrat, O. Lang, I. Mosseri, W.T. Freeman, M. Rubinstein, M. Irani, T. Dekel

CVPR 2020 Oral
Neural separation of observed and unobserved distributions

Neural Separation of Observed and Unobserved Distributions

T. Halperin, A. Ephrat, Y. Hoshen

ICML 2019
Dynamic temporal alignment of speech to lips

Dynamic Temporal Alignment of Speech to Lips

T. Halperin*, A. Ephrat*, S. Peleg (* equal contribution)

ICASSP 2019
Looking to Listen at the Cocktail Party architecture

Looking to Listen at the Cocktail Party: A Speaker-Independent Audio-Visual Model for Speech Separation

A. Ephrat, I. Mosseri, O. Lang, T. Dekel, K. Wilson, A. Hassidim, W.T. Freeman, M. Rubinstein

SIGGRAPH 2018
Seeing Through Noise visually driven speaker separation

Seeing Through Noise: Visually Driven Speaker Separation and Enhancement

A. Gabbay, A. Ephrat, T. Halperin, S. Peleg

IEEE ICASSP 2018
Automatic liver tumor delineation in follow-up CT studies

Patient-specific and Global Convolutional Neural Networks for Robust Automatic Liver Tumor Delineation in Follow-up CT Studies

R. Vivanti, L. Joskowicz, N. Lev Cohain, A. Ephrat, J. Sosna

Medical & Biological Engineering & Computing, March 2018
Improved speech reconstruction from silent video

Improved Speech Reconstruction from Silent Video

A. Ephrat*, T. Halperin*, S. Peleg (* equal contribution)

ICCV 2017 Workshop on Computer Vision for Audio-Visual Media
Vid2speech speech reconstruction from silent video

Vid2speech: Speech Reconstruction from Silent Video

A. Ephrat, S. Peleg

IEEE ICASSP 2017
Compact CNN for indexing egocentric videos

Compact CNN for Indexing Egocentric Videos

Y. Poleg, A. Ephrat, C. Arora, S. Peleg

IEEE WACV 2016
Automatic liver tumor segmentation in follow-up CT scans

Automatic Liver Tumor Segmentation in Follow-Up CT Scans

R. Vivanti, A. Ephrat, L. Joskowicz, O.A. Karaaslan, N. Lev Cohain, J. Sosna

MICCAI Workshop on Patch-based Techniques in Medical Imaging, 2015
04

Work Experience

Google DeepMind logo

Google DeepMind

  • Research Scientist 2024 – Present
Google logo

Google Research

  • Software Engineer 2018 – 2024
  • Software Engineering Intern 2017
  • Software Engineering Intern, Google 2016
Here a Story logo

Here a Story

  • Co-founder & Web Developer 2013 – 2014
05

Teaching

Hebrew University of Jerusalem logo

The Hebrew University of Jerusalem

  • TA, Digital Image Processing 2017 – 2018
  • TA, Undergraduate Engineering Projects & Workshop 2015 – 2018