Video Thumbnail Generation via Selective Frame Extraction
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Solution Overview
Problem
Existing electronic devices lack an efficient method to generate and display video thumbnail files for multimedia files stored in external storage devices, which hinders user navigation and storage efficiency.
Innovation Solution
An electronic device with a first decoder to decode frames, an encoder to encode decoded frames, and a controller to manage the process of generating and storing video thumbnail files, allowing for efficient storage and display of thumbnails, reducing storage space requirements and enhancing user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If video thumbnail files are generated by decoding and encoding all frames, then thumbnail quality is improved, but storage space and processing time increase
Solution Approach 1:
The patent extracts only essential frame information (e.g., key frames or representative frames) from the original video to create thumbnails, rather than processing all frames. This selective extraction reduces the quantity of data that needs to be decoded and encoded, thereby reducing storage space requirements while maintaining sufficient thumbnail quality for navigation purposes
Solution Approach 2:
The patent applies partial action by processing only a subset of frames (e.g., every nth frame or only key frames) rather than all frames in the video. This partial processing approach achieves acceptable thumbnail quality for user navigation without the excessive storage and processing costs of complete frame-by-frame encoding
2Ease of operation
If video thumbnail files are generated for all multimedia files, then user navigation capability is improved, but processing time and device complexity increase
Solution Approach 1:
The patent performs preliminary action by pre-generating and storing video thumbnail files alongside the original multimedia files. These pre-generated thumbnails are readily available for immediate user navigation without requiring real-time processing, thereby improving ease of operation while distributing the processing complexity across time rather than concentrating it during playback
Solution Approach 2:
The patent creates simplified copies (thumbnails) of the original video content that capture essential visual information. These thumbnail copies enable efficient user navigation and scene search without requiring the device to handle the full complexity of the original high-resolution video data, thus improving ease of operation while reducing processing demands
Data Source
AI summary
An electronic device and a method of operating the same, the electronic device including a first decoder that decodes frames configuring a multimedia file stored in an external storage device; an encoder that encodes decoded frames included in a first decoded file; memory; and a controller that reads the multimedia file from the external storage device, extracts the frames from the read multimedia file, controls the first decoder and the encoder, and controls the memory to store the video thumbnail file output from the encoder.