Institut für Nachrichtentechnik

S. Göring and R. R. Ramachandra Rao, “Instagram-like filters for ai-generated and real photos,” Instagram-like filters for AI-generated and real photos (March 17, 2026), 2026. [ bib | DOI ]

D. Keller, R. R. Ramachandra Rao, J. Prenzel, and A. Raake, “A subjective and objective evaluation of viewing distance and 4k video quality,” IEEE Access, 2026. [ bib ]

J. Prenzel, D. Keller, R. R. Ramachandra Rao, and A. Raake, “Sensory evaluation of hdr display properties,” in Proc. of International Picture Coding Symposium PCS '25, (Aachen, Germany), IEEE, Piscataway, Dec. 2025. [ bib | DOI ]

W. Menz, A. Bhattacharya, R. R. Ramachandra Rao, T. Robotham, F. Immohr, S. Göring, E. A. P. Habets, and A. Raake, “Influence of 4th-order ambisonics audio on the perceived quality and exploration behavior of 360^o videos,” in Proc. of International Conference on Metaverse Computing, Networking and Applications MetaCom '25, pp. 381–388, Aug. 2025. [ bib | DOI ]

S. Göring, R. R. Ramachandra Rao, and A. Raake, “Exploiting llms for metadata-based video quality prediction,” in Proc. of IEEE International Symposium on Multimedia ISM '25, pp. 73–74, IEEE, 2025. [ bib ]

W. Menz, A. Zoubarev, D. Kutschke, R. R. Ramachandra Rao, L. Bassbouss, S. B. von der Heide, S. Göring, and A. Raake, “Evaluation of a floating-head communication prototype for video-conferencing,” in Proc. of IEEE International Symposium on Multimedia ISM '25, pp. 76–76, IEEE, 2025. [ bib ]

W. Menz, R. Dittrich, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Smarter traps: Neural network-driven classification of small mammals,” in Proc. of IEEE International Symposium on Multimedia ISM '25, pp. 4–4, IEEE, 2025. [ bib ]

W. Menz, J. Hartbrich, A. Bhattacharya, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Impact of texture resolution, polygon count, quality level, and viewing distance on volumetric avatar visual quality,” in Proc. of International Conference on Metaverse Computing, Networking and Applications MetaCom '25, pp. 165–172, IEEE, 2025. [ bib ]

W. Menz, A. Bhattacharya, R. R. Ramachandra Rao, T. Robotham, F. Immohr, S. Göring, E. A. Habets, and A. Raake, “Influence of 4th-order ambisonics audio on the perceived quality and exploration behavior of 360° videos,” in Proc. of International Conference on Metaverse Computing, Networking and Applications MetaCom '25, pp. 381–388, IEEE, 2025. [ bib ]

M. Jenadeleh, J. Sneyers, D. Lazzarotto, S. Mohammadi, D. Keller, A. Boev, R. R. Ramachandra Rao, A. Pinheiro, T. Richter, A. Raake, et al., “Fine-grained hdr image quality assessment from noticeably distorted to very high fidelity,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '25, pp. 1–7, IEEE, 2025. [ bib ]

R. R. Ramachandra Rao, S. Göring, S. Fremerey, D. Keller, and A. Raake, “A large-scale evaluation of subject rating behaviour in visual quality assessment studies,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '25, pp. 1–7, IEEE, 2025. [ bib ]

T. Surdu, L. Treybig, F. Klein, R. R. Ramachandra Rao, and S. Werner, “Investigating the effects of sound source occlusion in a real dynamic scenario,” 2025. [ bib | DOI ]

B. Chen, Z. Shang, J. W. Chung, D. Lerner, W. Robitza, R. R. Ramachandra Rao, A. Raake, and A. C. Bovik, “Satellite streaming video qoe prediction: A real-world subjective database and network-level prediction models,” IEEE Access, 2025. [ bib ]

B. Herb, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Evaluating video quality metrics for neural and traditional codecs using 4k/uhd-1 videos,” arXiv preprint arXiv:2511.00969, 2025. [ bib ]

S. Fremerey, S. Göring, R. R. Ramachandra Rao, and A. Raake, “Analyzing crowd-and screen-based exploration behavior compared to hmd viewing in 360° videos,” IEEE Access, vol. 13, pp. 187686–187712, 2025. [ bib ]

R. R. Ramachandra Rao, S. Göring, A. Raake, P. List, W. Robitza, B. Feiten, and U. Wüstenhagen, “Information-adaptive mixed deterministic/machine-learning-based bit stream video-quality model,” December 2024. Filed: 2019-10-02; Application No.: EP19201123.7A; Published: EP3800882A1 (2021-04-07); Granted: EP3800882B1 (2024-12-04). Available: https://patents.google.com/patent/EP3800882B1/en. [ bib ]

B. Elmeligy, T. Richter, R. R. Ramachandra Rao, S. Fößel, and A. Raake, “Evaluating visually lossless compression of jpeg xs, jpeg 2000, hevc and av1 in selected medical imaging modalities,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '24, pp. 221–227, IEEE, 2024. [ bib ]

R. R. Ramachandra Rao, B. Herb, H.-A. Takala, M. T. M. Ahmed, and A. Raake, “Avt-vqdb-uhd-1-hdr: An open video quality dataset for quality assessment of uhd-1 hdr videos,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '24, pp. 179–185, IEEE, 2024. [ bib ]

D. Keller, R. R. Ramachandra Rao, and A. Raake, “Assessing quality differences for 8k/uhd-2 and 4k/uhd-1 hdr video based on viewing distance,” IEEE Access, vol. 12, pp. 155024–155039, 2024. [ bib ]

R. R. Ramachandra Rao, S. Göring, and A. Raake, “Adaptation of bitstream-based video quality models for image quality assessment,” in Proc. of IEEE International Symposium on Multimedia ISM '23, pp. 230–231, IEEE, 2023. [ bib ]

S. Fremerey, R. F. U. Zaman, T. Ashraf, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Towards evaluation of immersion, visual comfort and exploration behaviour for non-stereoscopic and stereoscopic 360° videos,” in Proc. of IEEE International Symposium on Multimedia ISM '23, pp. 131–138, IEEE, 2023. [ bib ]

D. Keller, R. R. Ramachandra Rao, S. Göring, and A. Raake, “The effect of viewing distances on 4k and 8k hdr video quality perception,” in Proc. of IEEE International Symposium on Multimedia ISM '23, pp. 123–130, IEEE, 2023. [ bib ]

R. R. Ramachandra Rao, S. Göring, B. Elmeligy, and A. Raake, “Avt-vqdb-uhd-1-appeal: A uhd-1/4k open dataset for video quality and appeal assessment using modern video codecs,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '23, pp. 1–6, IEEE, 2023. [ bib ]

A. Singla, S. Wang, S. Göring, R. R. Ramachandra Rao, I. Viola, P. Cesar, and A. Raake, “Subjective quality evaluation of point clouds using remote testing,” in Proc. of the 2nd International Workshop on Interactive eXtended Reality, pp. 21–28, 2023. [ bib ]

C. Diao, L. Sinani, R. R. Ramachandra Rao, and A. Raake, “Revisiting videoconferencing qoe: Impact of network delay and resolution as factors for social cue perceptibility,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '23, pp. 240–243, IEEE, 2023. [ bib ]

F. Braun, R. R. Ramachandra Rao, W. Robitza, and A. Raake, “Automatic audiovisual asynchrony measurement for quality assessment of videoconferencing,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '23, pp. 248–251, IEEE, 2023. [ bib ]

S. Göring, R. R. Ramachandra Rao, R. Merten, and A. Raake, “Appeal and quality assessment for ai-generated images,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '23, pp. 115–118, IEEE, 2023. [ bib ]

R. R. Ramachandra Rao, S. Borer, D. Lindero, S. Göring, and A. Raake, “Pnats-uhd-1-long: An open video quality dataset for long sequences for http-based adaptive streaming qoe assessment,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '23, pp. 252–257, IEEE, 2023. [ bib ]

S. Göring, R. R. Ramachandra Rao, R. Merten, and A. Raake, “Analysis of appeal for realistic ai-generated photos,” IEEE Access, vol. 11, pp. 38999–39012, 2023. [ bib | DOI ]

S. Göring, R. R. Ramachandra Rao, and A. Raake, “Quality assessment of higher resolution images and videos with remote testing,” Quality and User Experience, vol. 8, no. 1, pp. 1–26, 2023. [ bib | DOI ]

R. R. Ramachandra Rao, Bitstream-based Video Quality Modeling and Analysis of HTTP-based Adaptive Streaming. PhD thesis, Technische Universität Ilmenau, 2023. Dissertation, Technische Universität Ilmenau, 2023. [ bib | DOI ]

F. Immohr, G. Rendle, A. Neidhardt, S. Göring, R. R. Ramachandra Rao, S. Arévalo Arboleda, B. Froehlich, and A. Raake, “Proof-of-concept study to evaluate the impact of spatial audio on social presence and user behavior in multi-modal vr communication,” in Proc. of ACM International Conference on Interactive Media Experiences IMX '23, pp. 209–215, Association for Computing Machinery, 2023. [ bib | DOI ]

P. List, R. R. Ramachandra Rao, W. Robitza, A. Raake, S. Göring, U. Wuestenhagen, and B. Feiten, “System and method to estimate blockiness in transform-based video encoding,” September 2022. US Patent App. 17/629,481. [ bib ]

W. Robitza, R. R. Ramachandra Rao, S. Göring, A. Dethof, and A. Raake, “Deploying the itu-t p.1203 qoe model in the wild and retraining for new codecs,” in Proc. of the 1st Mile-High Video Conference, pp. 121–122, 2022. [ bib ]

R. R. Ramachandra Rao, S. Göring, and A. Raake, “Avqbits—adaptive video quality model based on bitstream information for various video applications,” IEEE Access, vol. 10, pp. 80321–80351, 2022. [ bib ]

S. Göring, R. R. Ramachandra Rao, S. Fremerey, and A. Raake, “Avrate voyager: An open source online testing platform,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '21, pp. 1–6, IEEE, 2021. [ bib ]

D. Keller, M. Vaalgamaa, E. Paajanen, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Groovability: Using groove as a novel measure for audio qoe with the example of smartphones,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '21, pp. 13–18, IEEE, 2021. [ bib ]

R. R. Ramachandra Rao, S. Göring, and A. Raake, “Towards high resolution video quality assessment in the crowd,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '21, pp. 1–6, IEEE, 2021. [ bib ]

W. Robitza, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Impact of spatial and temporal information on video quality and compressibility,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '21, pp. 65–68, IEEE, 2021. [ bib ]

A. Singla, S. Göring, D. Keller, R. R. Ramachandra Rao, S. Fremerey, and A. Raake, “Assessment of the simulator sickness questionnaire for omnidirectional videos,” in Proc. of IEEE Conference on Virtual Reality and 3D User Interfaces VR '21, pp. 198–206, IEEE, 2021. [ bib ]

R. R. Ramachandra Rao, S. Göring, and A. Raake, “Enhancement of pixel-based video quality models using meta-data,” Electronic Imaging, vol. 33, pp. 1–7, 2021. [ bib ]

S. Göring, R. R. Ramachandra Rao, B. Feiten, and A. Raake, “Modular framework and instances of pixel-based video quality models for uhd-1/4k,” IEEE Access, vol. 9, pp. 31842–31864, 2021. [ bib ]

R. R. Ramachandra Rao, S. Göring, P. List, B. Feiten, U. Wüstenhagen, and A. Raake, “Itu-t rec. p.1204.3, video quality assessment of streaming services over reliable transport for resolutions up to 4k with access to full bitstream information,” 2020. [ bib ]

R. R. Ramachandra Rao, S. Göring, R. Steger, S. Zadtootaghaj, N. Barman, S. Fremerey, S. Möller, and A. Raake, “A large-scale evaluation of the bitstream-based video-quality model itu-t p.1204.3 on gaming content,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '20, pp. 1–6, IEEE, 2020. [ bib ]

S. Zadtootaghaj, N. Barman, R. R. Ramachandra Rao, S. Göring, M. G. Martini, A. Raake, and S. Möller, “Demi: Deep video quality estimation model using perceptual video quality dimensions,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '20, pp. 1–6, IEEE, 2020. [ bib ]

S. Göring, R. Steger, R. R. Ramachandra Rao, and A. Raake, “Automated genre classification for gaming videos,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '20, pp. 1–6, IEEE, 2020. [ bib ]

S. Fremerey, S. Göring, R. R. Ramachandra Rao, R. Huang, and A. Raake, “Subjective test dataset and meta-data-based models for 360° streaming video quality,” in Proc. of IEEE International Workshop on Multimedia Signal Processing MMSP '20, pp. 1–6, IEEE, 2020. [ bib ]

R. R. Ramachandra Rao, S. Göring, P. List, W. Robitza, B. Feiten, U. Wüstenhagen, and A. Raake, “Bitstream-based model standard for 4k/uhd: Itu-t p.1204.3—model details, evaluation, analysis and open source implementation,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '20, pp. 1–6, IEEE, 2020. [ bib ]

S. Göring, R. R. Ramachandra Rao, and A. Raake, “Prenc—predict number of video encoding passes with machine learning,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '20, pp. 1–6, IEEE, 2020. [ bib ]

A. Raake, J. Gustafsson, R. R. Ramachandra Rao, S. Borer, S. Satti, D. Lindero, G. Heikkilä, S. Göring, P. List, B. Feiten, et al., “Itu-t rec. p.1204, video quality assessment of streaming services over reliable transport for resolutions up to 4k,” 2020. [ bib ]

A. Raake, A. Singla, R. R. Ramachandra Rao, W. Robitza, and F. Hofmeyer, “Sisimo: Towards simulator sickness modeling for 360 videos viewed with an hmd,” in Proc. of IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops VRW '20, pp. 582–583, IEEE, 2020. [ bib ]

A. Raake, S. Borer, S. Satti, J. Gustafsson, R. R. Ramachandra Rao, S. Medagli, P. List, S. Göring, D. Lindero, W. Robitza, et al., “Multi-model standard for bitstream-, pixel-based and hybrid video quality assessment of uhd/4k: Itu-t p. 1204,” IEEE Access, vol. 8, pp. 193020–193049, 2020. [ bib | DOI ]

A. Singla, R. R. Ramachandra Rao, S. Göring, and A. Raake, “Assessing media qoe, simulator sickness and presence for omnidirectional videos with different test protocols,” in Proc. of IEEE Conference on Virtual Reality and 3D User Interfaces VR '19, pp. 1163–1164, IEEE, 2019. [ bib ]

R. R. Ramachandra Rao, S. Göring, W. Robitza, B. Feiten, and A. Raake, “Avt-vqdb-uhd-1: A large scale video quality database for uhd-1,” in Proc. of IEEE International Symposium on Multimedia ISM '19, pp. 17–177, IEEE, 2019. [ bib ]

S. Göring, R. R. Ramachandra Rao, and A. Raake, “Nofu—a lightweight no-reference pixel based video quality model for gaming content,” in Proc. of IEEE International Conference on Quality of Multimedia Experience QoMEX '19, pp. 1–6, IEEE, 2019. [ bib ]

R. R. Ramachandra Rao, S. Göring, P. Vogel, N. Pachatz, J. J. V. Villarreal, W. Robitza, P. List, B. Feiten, and A. Raake, “Adaptive video streaming with current codecs and formats: Extensions to parametric video quality model itu-t p.1203,” Electronic Imaging, vol. 31, pp. 1–7, 2019. [ bib ]