MMT to MPEG-2 TS Format Conversion for Secure Copy Control
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Solution Overview
Problem
Current systems for recording and reproducing MMT format data lack the capability to securely copy data while adhering to the copy control information set in the initial MMT format, leading to potential unauthorized copying of copyrighted broadcast content.
Innovation Solution
An information processing apparatus that converts MMT format data to MPEG-2 TS format data, acquiring and converting copy control information from the MMT format to the MPEG-2 TS format, and records it to ensure secure copying by referring to and complying with the copy control information, thereby preventing unauthorized copying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MMT format data is recorded to medium using conventional systems, then data recording is achieved, but copy control compliance is lost leading to unauthorized copying
Solution Approach 1:
The patent applies preliminary action by extracting and converting copy control information from MMT format data before recording to medium. The system proactively transforms the copy control information into MPEG-2 TS format-compatible form and embeds it in the recorded data, ensuring copy control compliance is established in advance before any copying operation occurs.
Solution Approach 2:
The patent uses an intermediary approach by introducing a format conversion process that acts as a mediator between MMT format data and MPEG-2 TS format recording. This intermediary conversion process extracts copy control information, transforms it to the appropriate format, and embeds it in the recorded data, thereby bridging the gap between the two formats while preserving copy control integrity.
2Ease of operation
If copy control information is not converted to MPEG-2 TS format, then recording process is simple, but copy control cannot be executed during data copying
Solution Approach 1:
The patent applies the extraction principle by separating copy control information from the main MMT format data stream. The system extracts the copy control information, converts it to MPEG-2 TS format-compatible form, and embeds it as a separate element within the recorded data structure. This allows the recording process to remain relatively simple while ensuring copy control information is properly formatted for execution.
3Productivity
If MMT format data is directly copied without format conversion, then copying speed is fast, but copy control information cannot be properly interpreted
Solution Approach 1:
The patent applies preliminary action by performing format conversion of copy control information during the initial recording process rather than during subsequent copying operations. The copy control information is extracted from MMT format, converted to MPEG-2 TS format, and embedded in the recorded data once during recording. This preliminary conversion ensures that all future copying operations can quickly copy the already-converted format without re-conversion, maintaining both speed and interpretability.
Data Source
AI summary
A configuration is implemented that converts MMT format data to MPEG-2 TSV format data for recording onto medium, thereby permitting copy control in compliance with the initial copy control information. MMT format data with copy control information set therein is input and converted to MPEG-2 TS format data for re-cording onto information recording medium. The copy control information recorded in the service description table (MH-SDT) stipulated by the MMT format is acquired and, in accordance with predetermined conversion rules, used to generate the copy control information for recording to the program map table (PMT) stipulated by the MPEG-2 TS. For example, the EPN and CCI values to be recorded to the PMT are determined in accordance with the conversion rules.