Playback Device Scene Importance Speed Control
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Solution Overview
Problem
Existing video playback devices fail to efficiently reduce playback time by not matching user-importance levels with playback speeds, leading to unnecessary prolonged playback of scenes deemed important by the video recorder.
Innovation Solution
A playback device and method that adjust playback speeds based on scene importance, playing back high-importance scenes at lower speeds and low-importance scenes at higher speeds, allowing for complete data review within a limited time frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all scenes are played back at normal speed, then playback quality is maintained, but playback time becomes excessively long
Solution Approach 1:
The playback device dynamically adjusts playback speed based on scene importance levels. The playback controller varies playback speed across different scenes - using normal speed for high-importance scenes and fast-forward speed for low-importance scenes - thereby resolving the contradiction between maintaining playback quality and reducing total playback time
Solution Approach 2:
Different playback speeds are applied to different scenes based on their importance. High-importance scenes receive normal playback speed while low-importance scenes receive accelerated playback speed, allowing the system to optimize overall playback time without sacrificing quality in critical segments
2Loss of time
If fast-forward playback is used for all scenes, then playback time is reduced, but important scenes are missed
Solution Approach 1:
The system dynamically switches between fast-forward and normal playback speeds based on the importance level of each scene. By detecting scene importance and adjusting playback speed accordingly, the system ensures that important scenes are viewed at normal speed while reducing time spent on less important scenes
Solution Approach 2:
Different playback treatments are applied to different scenes based on their importance. Important scenes are played back at normal speed to ensure completeness, while less important scenes are accelerated, thereby maintaining content reliability for critical segments while reducing overall playback time
3Extent of automation
If motion detection is used to determine playback speed, then automated playback control is achieved, but user intent is not accurately reflected
Solution Approach 1:
The system changes the parameter used for playback speed determination from motion detection to scene importance level. By using importance levels that reflect user intent rather than just motion presence, the system accurately captures what the user wants to view while maintaining automated playback control
Solution Approach 2:
Instead of determining playback speed based on what is moving in the scene (motion detection), the system determines playback speed based on the importance level assigned to each scene. This inversion of the control parameter allows the system to reflect user intent more accurately
Data Source
AI summary
A playback device includes a playback controller that sets a scene with a higher level of importance at a lower playback speed and sets a scene with a lower level of importance at a higher playback speed based on a level of importance of each scene of video data, and an image data processor that converts the video data into a playback speed set by the playback controller for each scene, wherein the playback controller plays back the video data within a preset playback time. Further, the playback method plays back video data within a preset playback time by playing back a scene with a higher level of importance at a lower playback speed and playing back a scene with a lower level of importance at a higher playback speed based on a level of importance of each scene.