Tom Bäckström

Associate Professor
Associate Professor
T405 Dept. Signal Processing and Acoustics

My research is focused on sustainable speech communications technology, where sustainable refers to methods which uses resources efficiently and ecologically and which do not expose the privacy or security of user more than necessary. I am currently chairing and a founding member of the ISCA Special Interest Group "Security and Privacy in Speech Communication". Previously, I have contributed to several international standards such as 3GPP Enhanced Voice Services and MPEG Unified Speech and Audio Coding. My current research topics include speech coding and enhancement, acoustic fingerprinting, distributed source coding, as well as studies in how people experience privacy for the purpose of developing better user-interfaces for voice operated devices.

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Areas of expertise

speech processing, speech coding, security and privacy in speech communication, speech enhancement, 111 Mathematics, 112 Statistics and probability, 113 Computer and information sciences, 213 Electronic, automation and communications engineering, electronics, Signal processing, Information systems science, Software engineering, operating systems, man-computer interaction, Communications engineering

Research groups

  • Speech Interaction Technology


Speech Localization at Low Bitrates in Wireless Acoustics Sensor Networks

Mariem Bouafif, Pablo Perez Zarazaga, Tom Bäckström, Zied Lachiri 2022 Frontiers in Signal Processing

Introduction to Speech Processing

Tom Bäckström, Okko Räsänen, Abraham Zewoudie, Pablo Perez Zarazaga, Liisa Koivusalo, Sneha Das, Esteban Gómez Mellado, Mariem Bouafif, Daniel Ramos 2022

NSVQ: Noise Substitution in Vector Quantization for Machine Learning

Mohammadhassan Vali, Tom Bäckström 2022 IEEE Access

Voice-Quality Features for Replay Attack Detection

Abraham Zewoudie, Tom Bäckström 2022 2022 30th European Signal Processing Conference (EUSIPCO)

Evaluation of Zero Frequency Filtering based Method for Multi-pitch Streaming of Concurrent Speech Signals

Mariem Bouafif Mansali, Tom Bäckström, Zied Lachiri 2021 28th European Signal Processing Conference, EUSIPCO 2020 - Proceedings

Intuitive Privacy from Acoustic Reach: A Case for Networked Voice User-Interfaces

Tom Bäckström, Sneha Das, Pablo Perez Zarazaga, Johannes Fischer, Rainhard Findling, Stephan Sigg, Le Nguyen 2021 Proceedings of the 1st ISCA Symposium on Security and Privacy in Speech Communication

Privacy in Speech Communication Technology

Tom Bäckström, Pablo Perez Zarazaga, Sneha Das, Stephan Sigg 2021

PyAWNeS-Codec: Speech and audio codec for ad-hoc acoustic wireless sensor networks

Tom Bäckström, Mariem Bouafif, Pablo Perez Zarazaga, Meghna Ranjit, Sneha Das, Zied Lachiri 2021 Proceedings of the European Signal Processing Conference 2021 (EUSIPCO)

Enhancement by postfiltering for speech and audio coding in ad-hoc sensor networks

Sneha Das, Tom Bäckström 2021 JASA Express Letters

Cancellation of Local Competing Speaker with Near-field Localization for Distributed Ad-Hoc Sensor Network

Pablo Perez Zarazaga, Mariem Bouafif, Tom Bäckström, Zied Lachiri 2021 22nd Annual Conference of the International Speech Communication Association, INTERSPEECH 2021