Video Quality Module Dynamic Adjustment
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Solution Overview
Problem
Streaming media technologies consume significant network bandwidth and resources even when the video component is not being viewed by the user, as they continue to stream video content in the background, leading to inefficient use of resources.
Innovation Solution
A video quality module that uses the Page Visibility API to determine the visibility status of a web browser tab containing a streaming media player, dynamically adjusting the video quality by decreasing or halting the video stream when the tab is not visible, while maintaining audio transmission, thereby conserving bandwidth and resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If video streaming continues in the background when the tab is not visible, then audio playback remains uninterrupted, but network bandwidth and system resources are wasted
Solution Approach 1:
The system dynamically adjusts video streaming based on tab visibility state. When the tab becomes invisible, the video stream is automatically halted or quality is decreased. When the tab becomes visible again, the video stream is restored. This dynamic adaptation resolves the contradiction by making resource usage conditional rather than static.
Solution Approach 2:
The multimedia stream is segmented into separate audio and video components. The system independently controls each component based on visibility status - audio continues uninterrupted while video is halted or quality-reduced when the tab is invisible. This segmentation allows selective resource allocation to resolve the contradiction.
2Loss of energy
If video quality is decreased when tab is in background, then network resources are conserved, but user experience may be degraded when tab is brought forward
Solution Approach 1:
The system periodically monitors tab visibility state and adjusts video quality accordingly. Rather than maintaining constant high quality, the system alternates between high quality (when visible) and reduced quality (when invisible), achieving periodic optimization that balances resource conservation with user experience.
Solution Approach 2:
The system changes the video quality parameter dynamically based on visibility state. When the tab is invisible, video quality is reduced to conserve bandwidth. When visible, quality is restored to default. This parameter adjustment resolves the contradiction by adapting resource usage to actual user needs.
3Productivity
If the video stream is halted when tab is not visible, then resource efficiency is improved, but the system complexity increases due to visibility monitoring
Solution Approach 1:
The system uses the browser's built-in Page Visibility API to automatically detect when the tab is invisible, without requiring external monitoring tools. This self-service approach leverages existing browser functionality, minimizing additional system complexity while achieving efficient resource allocation.
Solution Approach 2:
The Page Visibility API acts as an intermediary that provides visibility status information to the streaming system. Rather than implementing complex monitoring logic, the system uses this intermediary to automatically obtain visibility state, simplifying the overall architecture while improving resource efficiency.
Data Source
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Figure 3A
AI summary
A video quality module receives data indicating a visibility status of a tab of a web browser running on a user device. The video quality module determines, based on the data indicating the visibility status of the tab whether the tab of the web browser is currently visible to a user of the user device, the tab of the web browser comprising a streaming media player. If the tab of the web browser is not currently visible to the user, the video quality module decreases a quality of a video component of a streaming media file playing in the streaming media player.