58 citations · 530 across the 57 of their papers we have counts for
57 papers
Energy-Aware Frame Rate Selection for Video Coding
Geetha Ramasubbu, Andrè Kaup, Christian Herglotz
The main contributions of this paper are twofold: First, we present an in-depth analysis of the impact of frame rate reductions on the visual quality of the video and the encoding…
Content-Driven Frame-Level Bit Prediction for Rate Control in Versatile Video Coding
Amritha Premkumar, Prajit T Rajendran, Vignesh V Menon +1
Rate control allocates bits efficiently across frames to meet a target bitrate while maintaining quality. Conventional two-pass rate control (2pRC) in Versatile Video Coding (VVC)…
Adaptive Resolution and Chroma Subsampling for Energy-Efficient Video Coding
Amritha Premkumar, Christian Herglotz
Conventional video encoders typically employ a fixed chroma subsampling format, such as YUV420, which may not optimally reflect variations in chroma detail across different types o…
Fast Multirate Encoding for 360° Video in OMAF Streaming Workflows
Amritha Premkumar, Christian Herglotz
Preparing high-quality 360-degree video for HTTP Adaptive Streaming requires encoding each sequence into multiple representations spanning different resolutions and quantization pa…
A High-Level Feature Model to Predict the Encoding Energy of a Hardware Video Encoder
Diwakara Reddy, Christian Herglotz, André Kaup
In today's society, live video streaming and user generated content streamed from battery powered devices are ubiquitous. Live streaming requires real-time video encoding, and hard…
Modeling the Energy Consumption of the HEVC Software Encoding Process using Processor events
Geetha Ramasubbu, Andrè Kaup, Christian Herglotz
Developing energy-efficient video encoding algorithms is highly important due to the high processing complexities and, consequently, the high energy demand of the encoding process.…
Design Space Exploration at Frame-Level for Joint Decoding Energy and Quality Optimization in VVC
Teresa Stürzenhofäcker, Matthias Kränzler, Christian Herglotz +1
In the pursuit of a reduced energy demand of VVC decoders, it was found that the coding tool configuration has a substantial influence on the bit rate efficiency and the decoding e…
SVT-AV1 Encoding Bitrate Estimation Using Motion Search Information
Lena Eichermüller, Gaurang Chaudhari, Ioannis Katsavounidis +4
Enabling high compression efficiency while keeping encoding energy consumption at a low level, requires prioritization of which videos need more sophisticated encoding techniques.…
Towards Video Codec Performance Evaluation: A Rate-Energy-Distortion Perspective
Geetha Ramasubbu, André Kaup, Christian Herglotz
The Bjøntegaard Delta rate (BD-rate) objectively assesses the coding efficiency of video codecs using the rate-distortion (R-D) performance but overlooks encoding energy, which is…
A Comprehensive Review of Software and Hardware Energy Efficiency of Video Decoders
Matthias Kränzler, Christian Herglotz, André Kaup
Energy and compression efficiency are two essential parts of modern video decoder implementations that have to be considered. This work comprehensively studies the following six vi…
Energy Demand Prediction for Hardware Video Decoders Using Software Profiling
Matthias Kränzler, Christian Herglotz, André Kaup
Energy efficiency for video communications is essential for mobile devices with a limited battery capacity. Therefore, hardware decoder implementations are commonly used to signifi…
Encoding Time and Energy Model for SVT-AV1 based on Video Complexity
Lena Eichermüller, Gaurang Chaudhari, Ioannis Katsavounidis +4
The share of online video traffic in global carbon dioxide emissions is growing steadily. To comply with the demand for video media, dedicated compression techniques are continuous…
Extended Signaling Methods for Reduced Video Decoder Power Consumption Using Green Metadata
Christian Herglotz, Matthias Kränzler, Xixue Chu +3
In this paper, we discuss one aspect of the latest MPEG standard edition on energy-efficient media consumption, also known as Green Metadata (ISO/IEC 232001-11), which is the inter…
Improving HEVC Encoding of Rendered Video Data Using True Motion Information
Christian Herglotz, David Müller, Andreas Weinlich +4
This paper shows that motion vectors representing the true motion of an object in a scene can be exploited to improve the encoding process of computer generated video sequences. Th…
On Versatile Video Coding at UHD with Machine-Learning-Based Super-Resolution
Kristian Fischer, Christian Herglotz, André Kaup
Coding 4K data has become of vital interest in recent years, since the amount of 4K data is significantly increasing. We propose a coding chain with spatial down- and upscaling tha…
Video Decoding Energy Estimation Using Processor Events
Christian Herglotz, André Kaup
In this paper, we show that processor events like instruction counts or cache misses can be used to accurately estimate the processing energy of software video decoders. Therefore,…
Component-wise Power Estimation of Electrical Devices Using Thermal Imaging
Christian Herglotz, Simon Grosche, Akarsh Bharadwaj +1
This paper presents a novel method to estimate the power consumption of distinct active components on an electronic carrier board by using thermal imaging. The components and the b…
Efficient coding of 360° videos exploiting inactive regions in projection formats
Christian Herglotz, Mohammadreza Jamali, Stéphane Coulombe +2
This paper presents an efficient method for encoding common projection formats in 360 video coding, in which we exploit inactive regions. These regions are ignored in the r…
Power Modeling for Virtual Reality Video Playback Applications
Christian Herglotz, Stéphane Coulombe, Ahmad Vakili +1
This paper proposes a method to evaluate and model the power consumption of modern virtual reality playback and streaming applications on smartphones. Due to the high computational…
Power-Efficient Video Streaming on Mobile Devices Using Optimal Spatial Scaling
Christian Herglotz, André Kaup, Stéphane Coulombe +1
This paper derives optimal spatial scaling and rate control parameters for power-efficient wireless video streaming on portable devices. A video streaming application is studied, w…
Encoder Complexity Control in SVT-AV1 by Speed-Adaptive Preset Switching
Lena Eichermüller, Gaurang Chaudhari, Ioannis Katsavounidis +4
Current developments in video encoding technology lead to continuously improving compression performance but at the expense of increasingly higher computational demands. Regarding…
Processing Energy Modeling for Neural Network Based Image Compression
Christian Herglotz, Fabian Brand, Andy Regensky +2
Nowadays, the compression performance of neural-networkbased image compression algorithms outperforms state-of-the-art compression approaches such as JPEG or HEIC-based image compr…
Motion Plane Adaptive Motion Modeling for Spherical Video Coding in H.266/VVC
Andy Regensky, Christian Herglotz, André Kaup
Motion compensation is one of the key technologies enabling the high compression efficiency of modern video coding standards. To allow compression of spherical video content, speci…
Video Decoding Energy Reduction Using Temporal-Domain Filtering
Christian Herglotz, Matthias Kränzler, Robert Ludwig +1
In this paper, we study decoding energy reduction opportunities using temporal-domain filtering and subsampling methods. In particular, we study spatiotemporal filtering using a co…