The Speech Processing and Transmission Laboratory (LPTV- Laboratorio de Procesamiento y Transmisión de Voz) at the Universidad de Chile was started by Prof. Nestor Becerra Yoma, Ph.D. in 2000 as part of the project "Robust processing of acoustic patterns for applications on the telephone line and Internet" funded by Conicyt/Fondecyt, Chile. Our research interests are focused on the following areas: speech technology, QoS in Internet and usability engineering.


LPTV has had an important role in research and teaching activities at the Department of Electrical Engineering. Since 2000, more than 40 research assistants have joined LPTV. Some of them are currently PhD students. Moreover, the results of our work have been used in practical and demonstrative experience in several undergraduate and graduate courses. The result of our research can also be found in our publications in the most prestigious international journals and conferences in the field of speech technology.

LPTV has maintained collaboration with several prominent universities and research centers: University of Edinburgh, UK; University of Southern California, USA; University of Colorado, USA; etc. Also, the head of LPTV has an active role in the international speech community, and is the chair and one of the co-founders of the ISCA Special Interest Group of Iberian Languages.


In addition, LPTV has already successfully achieved world-class technology transfer results: a speech recognition engine, that was completely developed here, is currently being used in a cellular service in Argentina. Also, a text-dependent speaker verification system is now under evaluation and technology for English teaching as a second language is one of our focus areas in R&D. Finally, the results of our research have had plenty of coverage in the local press.



Language Digital Assistant (See video).

Cinema Enquiry System (See video)

Speaker Verification (See video)


Speech Processing and Transmission Laboratory