Distribution Device Segments Composition Information for Hybrid Transmission
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Solution Overview
Problem
In hybrid transmission systems, the increasing number of components in content and complexity of composition information lead to inefficient data transmission, particularly in repeated transmission schemes like PAT/PMT, while on-demand distribution methods are limited and not applicable to systems without communication backchannels, such as broadcasting.
Innovation Solution
A distribution device and method that acquires composition information, rewrites parts of it in a reference format to generate reference format composition information and reference destination composition information, allowing for efficient distribution by varying transmission times and paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If composition information is repeatedly distributed at regular intervals (PAT/PMT method), then reproduction start delay is minimized, but data transmission efficiency deteriorates due to redundant information
Solution Approach 1:
The composition information is divided into two types: main composition information (distributed repeatedly at regular intervals to ensure quick reproduction start) and sub-composition information (distributed on-demand only when components are actually used). This segmentation resolves the contradiction by applying different distribution strategies to different parts of the information based on their importance and update frequency.
Solution Approach 2:
Instead of distributing the complete composition information repeatedly, the system distributes only the necessary main composition information at regular intervals and supplements it with sub-composition information only when needed. This partial action approach reduces redundant data transmission while maintaining sufficient information for timely reproduction.
2Loss of energy
If composition information is distributed on-demand asynchronously, then data transmission efficiency improves, but reproduction start delay increases
Solution Approach 1:
The composition information is segmented into main and sub components with different distribution timing strategies. Main composition information is distributed repeatedly at regular intervals to ensure quick reproduction start, while sub-composition information is distributed on-demand. This segmentation allows the system to achieve both fast reproduction start and efficient data transmission.
3Adaptability or versatility
If the number of components in content increases, then content functionality improves, but composition information complexity and data amount increase
Solution Approach 1:
The composition information is divided into main composition information (containing common components and reproduction modes) and sub-composition information (containing specific component details). This segmentation allows the system to handle increasing numbers of components by distributing only necessary information, preventing composition information complexity from scaling linearly with content functionality.
Solution Approach 2:
The main composition information serves as a universal template that can be applied to multiple content types and component combinations. By establishing common reproduction modes and component definitions in the main composition information, the system can handle diverse content functionality without proportionally increasing composition information complexity.
Data Source
AI summary
A distribution server (1) according to the present invention acquires composition information (17) including information specifying each of a plurality of components included in acquired content and information indicating a reproduction mode of the components, and includes a composition information generation unit (15) rewriting a part of the information included in the composition information (17) in a reference format to generate main composition information and to generate sub-composition information including the information referred to with the main composition information and a distribution control unit (16) distributing the main composition information and the sub-composition information generated by the composition information generation unit (15). Thus, the composition information can be distributed with high efficiency without using on-demand distribution.