Content-Aware Energy Savings for Mobile Video Streaming
Solution Overview
Problem
Mobile devices face significant power consumption issues due to the energy-intensive display and processing requirements, particularly when playing video content that includes advertising, which can rapidly drain the battery, limiting usage time.
Innovation Solution
A system and method that detects video content and unwanted advertising within it, allowing the mobile device to switch to a low-power mode during playback, utilizing techniques such as dynamic frequency and voltage scaling, reducing display brightness, and lowering image resolution to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the display is operated at full brightness and processing power during video playback, then the user experience is maintained at high quality, but the battery life is significantly reduced
Solution Approach 1:
The system dynamically adjusts display brightness and processing power based on the detected content type. During advertisement playback, the display brightness is reduced and processing power is scaled down, while during main content playback, full performance is restored. This dynamic adaptation resolves the contradiction by matching resource consumption to actual user needs.
Solution Approach 2:
The system applies different quality levels to different time periods of video playback. Advertisement segments are rendered at lower quality (reduced brightness and processing power), while main content segments are rendered at full quality. This local differentiation allows battery life extension without significantly impacting overall user experience.
2Use of energy by stationary object
If the display brightness is reduced to save power, then the power consumption decreases, but the user experience is degraded
Solution Approach 1:
The system periodically switches between low-power and full-power modes based on the video content structure. During advertisement intervals, the display operates at reduced brightness to conserve power. During main content playback, the display returns to full brightness. This periodic switching ensures that power savings are achieved during less important segments while maintaining user experience during critical segments.
3Duration of action of moving object
If the processing power is reduced during advertisement playback, then the battery life is extended, but the video quality may be compromised
Solution Approach 1:
The system changes processing parameters dynamically based on content type. During advertisement playback, processing power and clock speeds are reduced to extend battery life. During main content playback, full processing power is restored to maintain video quality. This parameter adjustment is transparent to users as they primarily care about main content quality, not advertisement quality.
Data Source
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Figure 3A~3B
AI summary
A system, computer readable medium, and method are provided for reducing the power consumption of a mobile device. The method includes the steps of detecting video content to be viewed in an application executed by the mobile device; detecting unwanted content associated with the video content; and operating the mobile device in a low-power mode during playback of the video content in the application in response to detecting the unwanted content. The mobile device may include a memory storing the application and a processor executing the application, which configures the processor to implement the method. Five techniques may be applied in the low-power mode to reduce power consumption including Dynamic Voltage and Frequency Scaling (DVFS), reducing resolution of content, reducing brightness of a display, masking content, and thread throttling. The low-power mode saves energy when playing back videos on the mobile device.