Subpicture Segment Recombination for Low-Delay Video Playback
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently processing the increasing amount of digital video data across various applications, necessitating improvements and optimizations.
Innovation Solution
A reproduction apparatus and method that combines segments of subpictures corresponding to specific points in time to generate access units, allowing for efficient reproduction and transmission of video content, including options for different display modes and views such as personalization, accessibility, and targeted advertising, without altering coding parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple segments are combined to support multiple display modes and views, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The video content is divided into multiple segments, each optimized for specific display modes (e.g., first segment for TV, second segment for mobile). The reproduction apparatus selectively combines segments based on the target display mode, enabling adaptability without processing the entire video for all modes. This segmentation allows the system to handle multiple display requirements while keeping the combination logic manageable.
Solution Approach 2:
Segments are preprocessed and prepared in advance for different display modes and views. The manifest file预先 describes multiple preselections with segment information for various scenarios. When reproduction is needed, the apparatus simply selects and combines pre-prepared segments according to the target mode, avoiding complex real-time processing and reducing operational complexity.
2Productivity
If segments are processed and combined in real-time, then productivity is improved, but loss of time increases
Solution Approach 1:
Segment information and combination parameters are prepared in advance and stored in the manifest file. The reproduction apparatus reads pre-configured segment lists and combination rules, enabling rapid selection and assembly without complex real-time analysis. This preliminary preparation significantly reduces the time required for segment combination while maintaining high reproduction efficiency.
Solution Approach 2:
The system uses template-based segment combination where predefined patterns for different display modes are stored as templates. When a specific display mode is required, the apparatus applies the corresponding template to combine segments, avoiding repetitive complex processing. This template copying approach accelerates the reproduction process while ensuring consistent quality across different modes.
3Adaptability or versatility
If multiple preselections are provided for different scenarios, then adaptability is improved, but manifest file complexity increases
Solution Approach 1:
The manifest file is segmented into multiple independent preselection entries, each containing segment information for a specific scenario or display mode. This structured segmentation allows the system to provide comprehensive scenario coverage while keeping each preselection entry manageable and easily interpretable. The apparatus can selectively read only relevant preselections based on the target scenario, reducing the effective complexity during operation.
Data Source
AI summary
A reproduction apparatus includes circuitry and memory coupled to the circuitry. In operation, the circuitry: obtains a first segment including first subpictures corresponding to points of time and a second segment including second subpictures corresponding to the points of time; combines the first subpictures and the second subpictures to generate access units corresponding to the points of time; and reproduces the access units generated.