Video Encoder I-Frame Placement for Seamless Seeking
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Solution Overview
Problem
Existing video compression techniques, such as MPEG-2, inconvenience users by requiring them to wait for the nearest I-frame when seeking to a specific position in a video, as they often lack sufficient granularity in frame placement, leading to increased file size when inserting more I-frames to address this issue.
Innovation Solution
A method and apparatus that analyze media content to determine scene changes and semantically significant sections, updating encoding parameters to place independent data frames at these locations, ensuring improved granularity and user experience without significantly increasing file size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If more I-frames are inserted into the compressed video file to improve seeking capability, then the granularity of video segments is improved, but the file size of the video increases
Solution Approach 1:
The patent applies local quality by placing I-frames at specific semantically significant locations (scene changes, dialogue boundaries, action sequences) rather than uniformly distributing them. This selective placement optimizes seeking performance at critical moments while avoiding unnecessary I-frames in stable regions, thereby improving seeking capability without proportionally increasing file size.
Solution Approach 2:
The patent changes the parameter of I-frame placement from fixed intervals or uniform distribution to dynamic placement based on semantic analysis of video content. By analyzing audio features, visual content, and metadata to identify semantically significant sections, the system adjusts I-frame positions to match user seeking behavior patterns, improving operational effectiveness while controlling data quantity.
2Ease of operation
If I-frames are placed at regular intervals to improve video segment granularity, then seeking performance is improved, but the file size increases due to redundant frame insertion
Solution Approach 1:
The patent extracts the function of I-frame placement from uniform temporal distribution and relocates it to semantic content-based positioning. By analyzing the semantic structure of video content (scenes, dialogue, actions) and extracting only the critical transition points, the system eliminates redundant I-frames that would be inserted at regular intervals, thereby maintaining granularity where needed while improving encoding efficiency elsewhere.
Solution Approach 2:
The system uses semantic analysis tools to automatically identify and mark semantically significant sections in the video content. This self-service approach allows the encoder to autonomously determine optimal I-frame placement based on content characteristics rather than relying on fixed patterns, improving both segment granularity and encoding efficiency through adaptive decision-making.
Data Source
AI summary
A method and apparatus for encoding media content. In the field of video compression, temporal compression generates I-frames and dependent P-frames and B-frames. The placement of I-frames is determined by the presence of scene switches in the video. In order to improve the ability of a user to seek to interesting parts of the video, a video encoder considers semantic data identifying narrative points of interest within the video. The encoding process generates encoded video data having I-frames present at scene transitions and also at narratively interesting parts of the video.