blog — ATCO2: Automatic collection and processing of voice data from air-traffic communications

Contextual adaptation for improving call sign recognition

— by admin — last modified Jul 19, 2021 01:47 PM

Contextual adaptation is a technique of “suggesting” small snippets of text that are likely to appear in the speech recognition output. The snippets of text are derived from the current “situation” of the speaker, in our project ATCO this is location and time.

ATC recording using SDR - deeper analysis - comparing HW setups

— by Igor Szoke — last modified Jul 08, 2021 11:35 AM

ATC recording using SDR - deeper analysis - raw signal processing and SNR estimation

— by Igor Szoke — last modified Jul 08, 2021 11:37 AM

This blog post is more technical. We describe our raw signal processing pipeline here. The rtl-airband software is set to produce raw data coming from the SDR hardware in cs16 format.

How to setup your SDR for clean ATC audio

— by Igor Szoke — last modified Jun 08, 2021 09:12 AM

Basic terminology and hardware setup description for ATC listening

— by Igor Szoke — last modified May 26, 2021 06:02 PM

What is the best SDR hardware choice for ATC

— by Igor Szoke — last modified Jun 07, 2021 05:58 PM

Where to place your antenna for ATC recordings

— by Igor Szoke — last modified Jun 07, 2021 06:03 PM

End to End Callsign Recognition System

— by Petr Motlicek — last modified May 12, 2021 03:45 PM

BUT partner ranked high for their work in the field of automatic speech recognition

— by Petr Motlicek — last modified May 12, 2021 03:45 PM

Faculty of Information Technology at Brno University of Technology is among the world leaders in this field of automatic speech recognition.

Improving callsign recognition by incorporating information from the radar

— by Petr Motlicek — last modified Mar 29, 2021 02:14 PM

When Air Traffic Controllers (ATCs) talk to pilots they identify the plane the pilot is flying with a callsign. These usually consist of one term for the airline and then a sequence of alphanumeric characters, for example "Speedbird Seven Alpha Five". When doing speech recognition for ATCs recognizing these is particularly important.

Processing speech recordings: some data protection issues by Romagna Tech

— by admin — last modified Feb 08, 2021 03:10 PM

When Air Traffic Control enthusiasts record conversations, they may be unaware of what speech is in terms of data protection: it can be regarded as biometric data, similarly to a fingerprint.

Setting Up VHF receiver for air-traffic communication

— by Petr Motlicek — last modified Nov 30, 2020 01:36 PM

Well, as people who follow ATCO2 project know, that it is about converting communication between pilot and air traffic controller (or controller in short) from voice to text.

Air Traffic Control Conversations Collection – A legal introduction by ELDA

— by Petr Motlicek — last modified Nov 30, 2020 12:00 PM

ELRA, the European Language Resources Association, and its distribution agency, ELDA, have been funded in 1995 and have been a world-wide leading player in distributing Language Resources and providing other services to the speech language communities. In the course of the ATCO2 project, ELDA provides legal expertise for the collection of Air Traffic Control Conversations and Data Management in the project.

Is it possible to have a cross-accent speech recognizer that works for different airports?

— by Petr Motlicek — last modified Nov 30, 2020 12:01 PM

One of the main concerns in automatic speech recognition (ASR) for air-traffic communications is the presence of several non-English accents in the English communications between pilots and air traffic controllers (ATCO).

Bringing together what belongs together: Matching voice commands and radar data

— by Petr Motlicek — last modified Nov 30, 2020 12:01 PM

The whole ATCO² Project relies on two input streams. One input stream is represented by the voice command issued by air-traffic controler and the other input stream is provided by the automatic dependent surveillance-broadcast data. An independent collection of both streams makes a matching of the data inevitable. The following lines will give an insight in how the matching process is done.

Automatic speech recognition, how it works?

— by Petr Motlicek — last modified Nov 30, 2020 12:01 PM

[Updated, 3.4.2020]: ATCO2 project is closely aligned with the development of automatic speech recognition engines for Air-Traffic Controllers (ATCOs), particularly to automatically transcribe their communication with the pilots. This blogpost is giving some insight into the process of Automatic Speech Recognition, current trends, and some details on how it will be integrated in the ATCO2 project. We are describing Hybrid HMM-based speech recognizer, which is the current state-of-the-art speech recognition paradigm. The literature also suggests end-to-end systems. However, we did not consider using these, due to practical reasons. We use the toolkit Kaldi [1], both for training the baseline models, and processing the untranscribed data.

The annotation started

— by Petr Motlicek — last modified Nov 30, 2020 12:02 PM

[Updated 1. 2. 2020]: The work on ATCO2 project started during Christmas. We kicked-off one of the important phases, which is a data collection and transcription. Why do we need to start with this? Well, this will be explained in larger context below!

Kick-off meeting

— by admin — last modified Dec 03, 2019 03:56 PM

The kick-off meeting took place at Brno University of Technology on November 22, 2019.