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Speech & Audio Processing

Speech processing has been one of the mainstays of Idiap’s research portfolio for many years. Today it is still the largest group within the institute, and Idiap continues to be recognised as a leading proponent in the field.

The expertise of the group encompasses statistical automatic speech recognition—based on hidden Markov models, or hybrid systems exploiting connectionist approaches—, text-to-speech, and generic audio processing, covering sound source localization, microphone arrays, speaker diarization, audio indexing, very low bit-rate speech coding, and perceptual background noise analysis for telecommunication systems.

Group News

Idiap’s postdoc receives BRIDGE Proof of Concept grant for audio deepfake detector

research — Mar 25, 2026

Ajinkya Kulkarni, a postdoctoral researcher at Idiap, has been awarded an SNSF Bridge Proof of Concept grant. His project addresses one of the fastest-growing threats in digital security: voice fraud. Audio deepfakes, AI-generated recordings that convincingly mimic real voices, are already being used for identity fraud, investment scams, and political disinformation.

Idiap researchers are Lemanic Life Science Hackathon winners

institute — Jun 05, 2024

Tilak Purohit and Barbara Ruvolo, contributing to Idiap’s AI for Life research program, won the 1st prize at the Lemanic Life Science Hackathon organized at EPFL at the end of April 2024. The team also included EPFL Life Science bachelor's students Alexandra Psaltis, Jia Xian Jennifer Shan, and Elise Boyer Their outcome is an AI-enabled user interface prototype to support the detection of depression via speech.

Idiap awards 2022

institute — Dec 21, 2022

Every year, the Institute nominates two students for its internal awards. In 2022, the Paper Award goes to Alexandre Bittar, and the Student Award goes to Teguh Lembono. Congratulations!

Artificial intelligence to answer challenges of Mexican society

research — Nov 25, 2022

Esau Villatoro, research associate at the Speech & Audio Processing group at Idiap, and his colleagues from the Mathematics Research Center (CIMAT) from Mexico have won first place in two competitions related to Natural Language Processing. The objective of these competitions is to improve important aspects of Mexican society such as tourism and communication.

A speech processing system inspired by the human brain

research — Oct 19, 2022

Idiap researchers published a paper describing an approach to speech processing based on the properties of the human brain. Their method proved as efficient as the current standard, whilst conserving the advantage of energy efficiency. Moreover, their work is replicable thanks to open access software paving the way for future applications.

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Group Job Openings

Our group is regularly posting job openings ranging from internships to researcher positions. To check the opportunities currently available or to submit a speculative applications use the link below.

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