Using automatic speech recognition for attacking acoustic CAPTCHAs: the trade-off between usability and security. - Hendrik Meutzner; Viet-Hung Nguyen; Thorsten Holz; Dorothea Kolossa (ACSAC, 2014)

Reducing the Cost of Breaking Audio CAPTCHAs by Active and Semi-supervised Learning. - Malte Darnstädt; Hendrik Meutzner; Dorothea Kolossa (ICMLA, 2014)

Constructing Secure Audio CAPTCHAs by Exploiting Differences between Humans and Machines. - Hendrik Meutzner; Santosh Gupta; Dorothea Kolossa (CHI, 2015)

A non-speech audio CAPTCHA based on acoustic event detection and classification. - Hendrik Meutzner; Dorothea Kolossa (EUSIPCO, 2016)

A generative-discriminative hybrid approach to multi-channel noise reduction for robust automatic speech recognition. - Hendrik Meutzner; Shoko Araki; Masakiyo Fujimoto; Tomohiro Nakatani (ICASSP, 2016)

Blind Non-Intrusive Speech Intelligibility Prediction Using Twin-HMMs. - Mahdie Karbasi; Ahmed Hussen Abdelaziz; Hendrik Meutzner; Dorothea Kolossa (INTERSPEECH, 2016)

Introducing the Turbo-Twin-HMM for Audio-Visual Speech Enhancement. - Steffen Zeiler; Hendrik Meutzner; Ahmed Hussen Abdelaziz; Dorothea Kolossa (INTERSPEECH, 2016)

Improving audio-visual speech recognition using deep neural networks with dynamic stream reliability estimates. - Hendrik Meutzner; Ning Ma 002; Robert M. Nickel; Christopher Schymura; Dorothea Kolossa (ICASSP, 2017)

Toward Improved Audio CAPTCHAs Based on Auditory Perception and Language Understanding. - Hendrik Meutzner; Santosh Gupta; Viet-Hung Nguyen; Thorsten Holz; Dorothea Kolossa (ACM Trans. Priv. Secur., 2017)

Supporting human-machine interaction by robust automatic speech recognition. - Hendrik Meutzner (2019)