Author Archives:

Prof. Mohammad Ghanbari (1948-2024)

Posted on January 31, 2024 by

In the wake of the passing of Prof. Mohammad Ghanbari, we extend our deepest condolences to his family during this challenging time. Prof. Ghanbari was a distinguished member of our Christian Doppler Laboratory ATHENA since its inception, and we consider … Continue reading →

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Exploring Bitrate Costs for Enhanced User Satisfaction: A Just Noticeable Difference (JND) Perspective

Posted on January 8, 2024 by

Data Compression Conference (DCC) 19-22 March 2024, Snowbird, Utah, USA [PDF] Hadi Amirpour (AAU, Austria), Jingwen Zhu (University of Nantes, France), Raimund Schatz (AIT, Austria), Patrick Le Callet (University of Nantes, France), and Christian Timmerer (AAU, Austria) Abstract: The evolving landscape of the delivery … Continue reading →

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A Real-time Video Quality Metric for HTTP Adaptive Streaming

Posted on December 14, 2023 by

IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 14-19 April 2024, Seoul, Korea [PDF] Hadi Amirpour (AAU, Austria), Jingwen Zhu (University of Nantes, France), Patrick Le Callet (University of Nantes, France), and Christian Timmerer (AAU, Austria) Abstract: In HTTP Adaptive Streaming (HAS), … Continue reading →

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Ring Co-XOR Encryption Based Reversible Data Hiding for 3D Mesh Model

Posted on December 13, 2023 by

Elsevier Signal Processing [PDF] Lingfeng Qu (Guangzhou University, China), Hui Lu (Guangzhou University, China), Peng Chen (Guangzhou University, China),  Hadi Amirpour (Alpen-Adria-Universität Klagenfurt, Austria), and Christian Timmerer (Alpen-Adria-Universität Klagenfurt, Austria)   Abstract: Reversible data hiding in encrypted domain (RDH-ED) is widely used for ensuring … Continue reading →

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VCIP’23 Tutorial: Advances in HTTP Adaptive Streaming: New Standards, Video Codecs, and Encoding Optimization Techniques

Posted on December 4, 2023 by

VCIP 2023 Monday, Dec4, 2023 https://vcip2023.iforum.biz/page/goto Lectures: Hadi Amirpour, AAU, AT Christian Timmerer, AAU, AT Abstract: The applications of video streaming are the primary drivers of Internet traffic, as over 82% of IP traffic in 2022. HTTP Adaptive Streaming (HAS) … Continue reading →

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JPEG Image Encryption with DC Rotation and Undivided RSV-based AC Group Permutation

Posted on November 20, 2023 by

IEEE Transactions on Multimedia (TMM) [PDF] Yuan Yuan (Southwest Jiaotong University, China), Hongjie He (Southwest Jiaotong University, China), Yaolin Yang (Southwest Jiaotong University, China), Hadi Amirpour (AAU, Klagenfurt, Austria), Christian Timmerer (AAU, Klagenfurt, Austria), Fan Chen (Southwest Jiaotong University, China) Abstract: Existing … Continue reading →

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Cryptanalysis of a Reversible Data Hiding Scheme in Encrypted Images by Improved Redundant Space Transfer

Posted on October 2, 2023 by

IEEE International Conference on Visual Communications and Image Processing (VCIP) 03-07 December 2023, Jeju, South Korea [PDF] Lingfeng Qu (SWJTU, China), Hongjie He (SWJTU, China), Hadi Amirpour (AAU, Austria), Mohammad Ghanbari (University of Essex, UK) , and Christian Timmerer (AAU, Austria) Abstract: In this paper, … Continue reading →

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