Scope
The paper explores the escalating power consumption issue of high-quality video streaming on mobile devices, propelled by hardware and streaming technology advancements. It identifies gaps in existing studies’ ability to accurately capture recent technologies, motivating the development of a novel method to model mobile video playback power consumption.
Through controlled experiments, the paper analyses the impact of various factors on power consumption during video playback, including encoding parameters, video genre, and display characteristics. It develops separate models for LED and LCD displays, considering factors like brightness level and colour rate to accurately estimate power consumption.
Summary
The paper addresses the issue of power consumption associated with high-quality video streaming on mobile devices. It specifically focuses on modelling mobile video playback power consumption, considering various factors such as hardware advancements, streaming technologies, encoding parameters, video genre, and display parameters. The paper aims to develop accurate models for estimating power consumption during video playback, considering the differences between LCD and LED displays.
The authors present a novel method to model mobile video playback power consumption, which involves identifying major contributing components and developing separate models for LED and LCD displays. By conducting controlled experiments to analyse the impact of encoding parameters, video genre, and display parameters on power consumption during video playback. The paper proposes separate models for LED and LCD displays, considering factors like brightness level and colour rate to estimate power consumption accurately. Furthermore, they assess the accuracy of the developed models in estimating video playback power consumption, both on training devices and unseen devices. Overall, the paper aims to contribute to understanding and mitigating power consumption challenges associated with mobile video streaming, ultimately enhancing the sustainability of video streaming technologies on mobile devices.
The main parameters considered in the paper for modelling mobile video playback power consumption include:
- Encoding Parameters:
- Bitrate: The amount of data processed per second during encoding.
- Resolution: The number of pixels processed for each frame during encoding and playback.
- Frame Rate: The number of frames used per second in a video, influencing the amount of processing required.
- Video Genre:
- Different characteristics, such as motion rate and shot proximity, impact power consumption during playback.
- Display Parameters:
- Screen Brightness: Higher brightness levels require more power consumption for LCD and LED displays.
- Colour Rate: Impacts power consumption, particularly for LED displays, where each pixel is lit separately based on colour levels.
- Display Type:
- LED vs LCD: LED screens change the amount of light based on colour levels, while LCD screens use constant light resources for brightness, leading to heterogeneous power consumption patterns.
- Device Heterogeneity:
- Variation in hardware and screen types across different devices influences power consumption patterns.
- Video Processing:
- Resolution: Higher resolutions require more processing power.
- Frame Rate: Higher frame rates increase processing demands.
Relevance for EXIGENCE
The end device (terminal) encoding could be a potential indicator for requirements and scenarios, energy metrics and energy measurements, because the focus is on display technologies and the power efficiency of those rather than on other parameters of the content delivery.