Summary

Staff Researcher in Audio and Multimedia Group at International Computer Science Institute, a private research lab affiliated with University of California, Berkeley

Research Interest
Specialties
Multimedia Retrieval, Audio Processing, Machine Learning, Big Data Analysis, Dynamic Web Development, Crowdsourcing
Languages
Python, Matlab, Java, C/C++, SQL, UNIX Shell Scripts
Web Development
Flask, web.py HTML/CSS, Javascript, D3.js, AJAX, REST, JSON

When I'm not at work, I cook, travel, take photos (street, landscape, star), and workout (tennis, soccer, indoor rowing, Krav Maga).

Professional Activities

Pubilcations

Link to my Google Scholar page

Book

Book Chapter

Journal Publications

  1. DCAR: A Discriminative and Compact Audio Representation for Audio Processing
    L. Jing, B. Liu, J. Choi, A. Janin, J. Bernd, MW. Mahoney, G. Friedland
    IEEE Transactions on Multimedia. 2017 May 12. [Link]
  2. Teaching Privacy: Multimedia Making a Difference
    J. Bernd, B. Gordo, J. Choi, B. Morgan, N. Henderson, S. Egelman, D. D. Garcia, and G. Friedland
    IEEE MultiMedia, Vol. 22 Issue 1, pp. 12-19, Feb 2015. [PDF]
  3. Creating Experts From the Crowd: Techniques for Finding Workers for Difficult Tasks
    L. Gottlieb, G. Friedland, J. Choi, P. Kelm, T. Sikora
    IEEE Transactions on Multimedia, Volume 16, Issue 7, 2014. [PDF]
  4. Semantic Computing and Privacy: A Case Study Using Inferred Geo-Location
    G. Friedland, J. Choi
    International Journal of Semantic Computing, 2011 [PDF]

Conference / Workshop Publications

  1. The Geo-Privacy Bonus of Popular Photo Enhancements.
    J. Choi, M. Larson, X. Li, K. Li, G. Friedland, A. Hanjalic.
    Proceedings of the 2017 ACM on International Conference on Multimedia Retrieval, 2017 (pp. 84-92). [PDF]
  2. A Discriminative and Compact Audio Representation for Event Detection.
    L. Jing, B. Liu, J. Choi, A. Janin, J. Bernd, M.W. Mahoney, G. Friedland
    Proceedings of the 2016 ACM on Multimedia Conference (pp. 57-61). [PDF]
  3. Evento 360: Social Event Discovery from Web-scale Multimedia Collection
    J. Choi, E. Kim, M. Larson, G. Friedland, A. Hanjalic
    Proceedings of the 23rd Annual ACM Conference on Multimedia Conference [PDF] - Grand Challenge Winner
  4. Kickstarting the Commons: The YFCC100M and the YLI Corpora
    J. Bernd, D. Borth, C. Carrano, J. Choi, B. Elizalde, G. Friedland, L. Gottlieb, K. Ni, R. Pearce, D. Poland, K. Ashraf, D. A. Shamma, B. Thomee
    Proceedings of the 2015 Workshop on Community-Organized Multimodal Mining: Opportunities for Novel Solutions [PDF]
  5. The Placing Task at Mediaeval 2015
    J. Choi, C. Hauff, O. V. Laere, B. Thomee
    Working Notes Proceedings of the MediaEval 2015 Workshop, Wurzen, Germany [PDF]
  6. The Placing Task: A Large-Scale Geo-Estimation Challenge for Social-Media Videos and Images
    J. Choi, B. Thomee, G. Friedland, L. Cao, K. Li, D. Borth, B. Elizalde, L. Gottlieb, C. Carrano, R. Pearce, D. Poland
    3rd ACM Multimedia Workshop on Geotagging and Its Applications in Multimedia 2014 [PDF]
  7. Human vs Machine: Establishing a Human Baseline for Multimodal Location Estimation
    J. Choi, H. Lei, V. Ekambaram, P. Kelm, L. Gottlieb, T. Sikora, K. Ramchandran, G. Friedland
    ACM SIGMM International Conference on Multimedia 2013 [PDF]
  8. A Novel Fusion Method for Integrating Multiple Modalities and Knowledge for Multimodal Location Estimation
    P. Kelm, S. Schmiedeke, J. Choi, G. Friedland, V. Ekambaram, K. Ramchandran, T. Sikora
    2nd ACM Multimedia Workshop on Geotagging and Its Applications in Multimedia 2013 [PDF]
  9. Nowhere to Hide: Exploring User-Verification across Flickr Accounts
    H. Lei, J. Choi, G. Friedland
    IEEE ICASSP 2013 [PDF]
  10. Matching Artificial Reverb Settings to Unknown Room Recordings: A Recommendation System for Reverb Plugins
    N. Peters, J. Choi, H. Lei
    Audio Engineering Society Convention 133, 2012 [PDF]
  11. Multimodal Location Estimation of Consumer Media: Dealing with Sparse Training Data
    J. Choi, V. Ekambaram, G. Friedland, K. Ramchandran
    IEEE ICME 2012 [PDF]
  12. Pushing the Limits of Mechanical Turk: Qualifying the Crowd for Video Geolocation
    L. Gottlieb, J. Choi, P. Kelm, T. Sikora, G. Friedland
    ACM Workshop on Crowdsourcing for Multimedia (CrowdMM) 2012 [PDF]
  13. Multimodal City-Identification on Flickr Videos Using Acoustic and Textual Features
    H. Lei, J. Choi, G. Friedland
    IEEE ICASSP 2012 [PDF]
  14. Multimodal Location Estimation on Flickr videos
    G. Friedland, J. Choi, H. Lei, A. Janin
    3rd ACM SIGMM International Workshop on Social Media 2011 [PDF]
  15. Video2GPS: A Demo of Multimodal Location Estimation on Flickr Videos
    G. Friedland, J. Choi, A. Janin
    19th ACM International Conference on Multimedia 2011 [PDF]
  16. Data-Driven vs. Semantic-Technology-Driven Tag-Based Video Location Estimation
    J. Choi, G. Friedland
    5th IEEE International Conference on Semantic Computing (ICSC) 2011 [PDF]
  17. User verification: Matching the uploaders of videos across accounts
    H. Lei, J. Choi, A. Janin, G. Friedland
    IEEE ICASSP 2011 [PDF]

Master's Report

Newsletter / Working Notes / Technical Reports

  1. The Accuracy of the Demographic Inferences Shown on Google's Ad Settings.
    M.C. Tschantz, S. Egelman, J. Choi, N. Weaver, G. Friedland
    ICSI Technical Report TR-16-003, 2016 [PDF]
  2. On Pushing the Limits of Mechanical Turk: Qualifying the Crowd for Video Geolocation
    L. Gottlieb, J. Choi, G. Friedland, P. Kelm, T. Sikora
    IEEE Communicatinos Society Multimedia Commu- nications Technical Committee E-Letter, Vol. 8, No. 1, January 2013. [PDF]
  3. Multimodal City-Identification on Flickr Videos Using Acoustic and Textual Features
    H. Lei, J. Choi, G. Friedland
    ICSI Technical Report TR-12-007, 2012 [PDF]
  4. The 2012 ICSI/Berkeley Video Location Estimation System
    J. Choi, V. Ekambaram, G. Friedland, K. Ramchandran
    MediaEval 2012 [PDF]
  5. City-Identification on Flickr Videos Using Acoustic Features
    H. Lei, J. Choi, G. Friedland
    ICSI Technical Report TR-11-001, 2011 [PDF]
  6. The 2011 ICSI Video Location Estimation System
    J. Choi, H. Lei, and G. Friedland
    MediaEval 2011 [PDF]
  7. Persona Linking: Matching Uploaders of Videos Accross Accounts
    H. Lei, J. Choi, A. Janin, G. Friedland
    ICSI Technical Report TR-10-009, 2010 [PDF]
  8. The 2010 ICSI Video Lcoation Estimation System
    J. Choi, A. Janin, G. Friedland
    MediaEval 2010 [PDF]

Research

Multimodal Video Location Estimation

The project investigates the task of automatic estimation of the geo-coordinates of the recorded media content (image, video or audio track). I designed and implemented the system that uses textual, visual and acoustic cues to narrow down the possible recording location for a given media content. [Project Page]

Global Inference and Privacy

The project aims at qualifying and quantifying the privacy implications of people sharing their life with other people over the network. I developed tools and web applications for the research and the education of the general public. [Project Page] [Demo Page]

Emotion-based Music Recommendation

Music recommendation based on emotion as expressed in acoustic cue and textual metadata (title, lyrics, etc).

Speech Activity Detection

Investigated a domain-insensitive framework to speech activity detection using a semi-supervised training approach such as integrating ICSI’s speech diarization engine into speech activity detection.

Contact Information

Jaeyoung Choi
1947 Center St. Suite 600
Berkeley, CA 94704
phone: +1-510-666-2883
e-mail: jaeyoung [at] icsi.berkeley.edu