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Vienna (viˈɛnə ; Wien viːn; Wean veɐ̯n) is the capital, largest city, and one of nine provinces of Austria. Vienna is Austria's most populous city and its primate city, with about two million inhabitants (2.9 million within the metropolitan area, nearly one-third of the country's population), and its cultural, economic, and political center. It is the sixth-largest city proper by population in the European Union and the largest of all cities on the Danube river. Until the beginning of the 20th century, Vienna was the largest German-speaking city in the world, and before the splitting of the Austro-Hungarian Empire in World War I, the city had two million inhabitants. Today, it is the second-largest German-speaking city after Berlin. Vienna is host to many major international organizations, including the United Nations, OPEC and the OSCE. The city is located in the eastern part of Austria and is close to the borders of the Czech Republic, Slovakia and Hungary. These regions w

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Building Blocks of Assistant Based Speech Recognition for Air Traffic Management Applications

Petr Motlicek, Mittul Singh

In air traffic control rooms around the world paper flight strips are replaced through different digital solutions. This enables other systems to access the instructed air traffic controller (ATCo) commands and use them for other purposes. Digital flight strip solutions, however, require manual input from the ATCo and, therefore, increase the workload. Recently the AcListant® project has validated that Assistant Based Speech Recognition (ABSR, which integrates a speech recognizer with an assistant system) could be a solution to avoid this increase of workload. However, adaptation of ABSR to new environments usually requires a lot of data, time and expertise, which makes the process expensive. The MALORCA project used machine learning (ML) algorithms to provide a generic, cheap and effective approach for adaptation. Therefore, ABSR was divided into conceptual modules that contain generic parts (building blocks) and domain specific models. As first show case ABSR was auto-matically adapted with radar data and voice recordings from Prague and Vienna approach. The fully trained system reaches command recognition rates (RR) of 92% (Prague) resp. 83% (Vienna) and command recognition error rates (ER) of 0.6% (Prague) resp. 3.2% (Vienna). The building blocks and models and their effect on RR and ER are presented in this paper.

SESARJU2018

Semi-supervised Adaptation of Assistant Based Speech Recognition Models for different Approach Areas

Petr Motlicek, Mittul Singh

Air Navigation Service Provider (ANSPs) replace paper flight strips through different digital solutions. The instructed commands from an air traffic controller (ATCOs) are then available in computer readable form. However, those systems require manual controller inputs, i.e. ATCOs’ workload increases. The Active Listening Assistant (AcListant®) project has shown that Assistant Based Speech Recognition (ABSR) is a potential solution to reduce this additional workload. However, the development of an ABSR application for a specific target-domain usually requires a large amount of manually transcribed audio data in order to achieve task- sufficient recognition accuracies. MALORCA project developed an initial basic ABSR system and semi-automatically tailored its recognition models for both Prague and Vienna approach by machine learning from automatically transcribed audio data. Command recognition error rates were reduced from 7.9% to under 0.6% for Prague and from 18.9% to 3.2% for Vienna.

2018

A Wealth of Typological Solutions from the Twenties: Vienna and Frankfurt

Alessandro Porotto

2019

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Austria (Österreich), formally the Republic of Austria (Republik Österreich), is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine provinces, one of which i

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Hungary (Magyarország ˈmɒɟɒrorsaːɡ) is a landlocked country in East-Central Europe. Spanning of the Carpathian Basin, Hungary is bordered by Slovakia to the north, Ukraine to the northeast, Romania t