MMT to BDAV Format Conversion for Copy Control
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Solution Overview
Problem
Current systems fail to reliably record and reproduce MPEG media transport (MMT) format data on media like Blu-ray discs and hard disks, and lack effective copy control mechanisms for MMT format data, leading to potential unregulated copying of copyrighted content.
Innovation Solution
A system that generates and records copy control information as an additional header with MMT format data, enabling reliable copy control and reproduction of MMT format data by converting it to BDAV format, ensuring compliance with original copy control settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MMT format data is recorded on media using existing BDAV format systems, then data recording and reproduction capability is achieved, but copy control mechanisms are lost leading to unregulated copying
Solution Approach 1:
The patent segments the MMT format data structure by extracting and separately managing copy control information from the original MMT packets. This segmentation allows the copy control information to be processed and stored independently, enabling reliable copy control while maintaining MMT format compatibility for the main data stream.
Solution Approach 2:
The patent introduces an intermediary conversion process that translates MMT format copy control information into BDAV format usage control information. This intermediary mechanism bridges the two formats, allowing MMT data to be recorded on BDAV-compatible media while preserving the original copy control restrictions through format translation.
2Reliability
If copy control information is embedded within MMT packets, then original copyright restrictions are maintained, but existing BDAV reproduction applications cannot access or enforce these controls
Solution Approach 1:
The patent creates a copied version of the copy control information, translating it from MMT format into BDAV usage control information format. This copied control information is then stored in a BDAV-compatible structure (usage control information file), allowing existing BDAV reproduction applications to access and enforce the original copyright restrictions without needing to understand the MMT format.
3Adaptability or versatility
If MMT format data is converted to BDAV format for medium recording, then media compatibility is improved, but the original MMT data structure and control information may be lost
Solution Approach 1:
The patent extracts the essential copy control information from the MMT format data structure before conversion to BDAV format. This extracted control information is then translated into BDAV usage control information, ensuring that the critical copyright protection data is preserved in the converted format without being lost during the MMT-to-BDAV conversion process.
Data Source
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AI summary
A configuration capable of recording MMT format data on a medium as BDAV format data and performing copy control according to the original copy control information is achieved. The MMT format data, for which copy control information is set, is input and recorded on an information recording medium as BDAV format data. As record data, (a) a stream file including a packet string in which the MMT format data is stored, and (b) copy control information corresponding to the stream file, in which the copy control information corresponding to the MMT format data is reflected, are generated and recorded as an additional header of a packet included in the stream file or as another file.