Display Device Thumbnail Preview Based on Playback History
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Solution Overview
Problem
Existing display devices struggle to effectively represent video content through thumbnails, as initial frames are often black, and fixed-position frames fail to adequately depict the video's content, leading to inefficiencies in storage and user recognition.
Innovation Solution
A display device that displays a preview video as a thumbnail for each video item, obtained based on past playback information, allowing users to easily recognize video content without the need for storing specific frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a first frame of a video is used as a thumbnail, then the thumbnail can be obtained quickly, but the thumbnail cannot properly deliver the contents of the video because the beginning of a video is often a black image
Solution Approach 1:
The system performs preliminary analysis of the video to identify key frames that contain meaningful content, rather than simply taking the first frame. This preliminary action ensures that the thumbnail will represent the video content effectively before it is displayed to the user.
Solution Approach 2:
The system changes the selection criterion from a fixed position (first frame) to a dynamic selection based on content analysis. By analyzing video parameters such as frame brightness, motion detection, and scene changes, the system identifies frames that best represent the video content.
2Ease of manufacture
If a frame corresponding to a certain position of the video is used as a thumbnail, then the thumbnail generation is simple, but the thumbnail is often insufficient to represent each video because a video in a fixed position is always used
Solution Approach 1:
The system transitions from a static thumbnail selection method (fixed position) to a dynamic method that adapts to each video's content. By analyzing characteristics such as scene changes, motion intensity, and visual interest, the system dynamically selects the most representative frame for each video, ensuring accurate content representation.
Solution Approach 2:
The system enables videos to select their own representative frames based on their intrinsic content characteristics. Each video is analyzed independently to identify its most meaningful frame, allowing the video content itself to determine the thumbnail rather than imposing a uniform selection criterion on all videos.
3Reliability
If frames extracted from the video are stored internally to be used as thumbnails, then the thumbnails can be displayed, but there is a problem of inefficiency in terms of performance of the device due to storage requirements
Solution Approach 1:
The system extracts only the essential information needed for thumbnail generation - specifically identifying key frame timestamps and metadata - rather than storing complete frame images. This extraction approach maintains thumbnail display capability while significantly reducing the storage burden on the device.
Solution Approach 2:
Instead of storing actual video frames in the device's internal memory, the system creates lightweight references or metadata copies that point to the original video content. These copies contain sufficient information to display and identify thumbnails without requiring substantial storage space, as the actual image data remains in the original video file.
Data Source
AI summary
A display device including a display; and a controller configured to receive a request to display a video list including at least one video item corresponding to a video, determine an existence of last playback information indicating a last playback time of the video, and in response to the existence of the last playback information, control the display to display the at least one video item with a first thumbnail representing a first preview video based on the last playback time of the video.