Multimedia Computing Group
The Multimedia Computing (MMC) Group develops algorithms for enriching, accessing, and searching large quantities of data. Such algorithms lie at the core of tomorrows’ search engines and large-scale recommender systems. The group sets its focus on developing systems that are oriented to the needs of users, and that solve the challenges faced by large-scale online content and service providers. Multimedia data analytics also has applications in the full range of fields that benefit from data science, including health, telecom, and geosciences.
The group has a track record of developing technologies that make possible optimized interaction with large collections of multimedia data (e.g., images, video, and music) in real-world contexts (e.g., within social networks). Our work requires a combination of mathematical models, machine learning techniques, and practical skills in algorithm development and evaluation. The members of the MMC group share expertise in multimedia information retrieval, recommender systems, multimedia signal processing, social network analysis, human computation (crowdsourcing) and quality of experience. Collaborations include joint work with researchers from Yahoo Labs, Telefónica Research, Microsoft Research and Google.
The work being carried out in the MMC Group encompasses a broad palette of research directions including:
- Multimedia content analysis and search
- Semantics extraction from multimedia data
- Multi-modal query expansion
- Multi-source search result reranking
- Multimedia information retrieval in a social network context
- Modeling information propagation and relationships in social networks
- Collaborative recommender systems
- Social recommendation
- Interaction with multimedia content
- (Affective) User profiling
- User (search/uploader) intent
- Query failure prediction
- Quality of multimedia experience
- Multimedia content management
- Multimedia databases and dataspaces
- Entity retrieval
- Human speech processing inspired automatic speech recognition:
- Building speech technology for under-resourced languages and languages without a common written language.
- Using knowledge about human speech processing to build help improve ASR algorithms.
- Building computational models of human speech processing using techniques from ASR.
10 August 2020
Graph Signal Processing: Connections to Distributed Optimization and Deep Learning
01 March 2020
Graph-Time Spectral Analysis for Atrial Fibrillation
16 February 2020
State-Space Network Topology Identification from Partial Observations
26 November 2019
Odette Scharenborg keynote speaker at Speech Technology Deep Dive
26 November 2019
Because of my Siri shame, I don't have a butler in my pocket for now
10 November 2019
Article in IEEE Transactions on Signal Processing by Elvin Isufi
15 September 2019
Best paper award for Jaeyoung Choi
Jaeyoung Choi PhD –student in INSY’s MMC group/ICSI, California, won best paper award at the IEEE 5th International Conference on Multimedia Big Data (Singapore).
12 September 2019
Forecasting Time Series with VARMA Recursions on Graphs
Recent development in signal processing and network science has brought new tools for processing time series. However, it was not yet clear on how to exploit the structure of a network for predicting the evolution of time series.