Media Bitstream Encoding with Mask Matrix Extraction
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Solution Overview
Problem
Existing methods for modifying media content, such as images, require retaining both original and modified files for recovery, leading to inefficient bandwidth and storage usage.
Innovation Solution
A method that encodes media bitstreams by generating a mask matrix and a sub-image of the modified region, embedding this information in the file header, allowing the original content to be recovered without needing the entire original file, using a transmorphing process that includes encryption and scrambling for data protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both original and modified media files are retained for recovery, then the original content can be recovered, but bandwidth usage and storage resources increase significantly
Solution Approach 1:
The patent extracts only the modified region of the media content and embeds it in the file header, along with a mask matrix indicating the modification location. This allows the original content to be recovered by extracting and replacing only the modified region, rather than retaining the entire original file. The extraction principle reduces storage and bandwidth requirements while maintaining recovery capability.
Solution Approach 2:
The patent segments the media content into modified and unmodified regions. By identifying and isolating only the modified portion (through the mask matrix), the system can store and transmit only the necessary changed data along with the modified file, enabling efficient recovery without requiring the complete original file.
2Reliability
If the entire original file is retained for recovery, then complete original content can be recovered, but memory usage and data processing requirements increase
Solution Approach 1:
The system extracts only the modified region and its location information (mask matrix) from the original file, embedding this minimal data in the file header. During recovery, only this extracted information needs to be processed to reconstruct the original content, significantly reducing memory usage and processing complexity compared to handling the entire original file.
Solution Approach 2:
Instead of copying the entire original file, the patent creates a minimal copy containing only the modified region and its metadata in the file header. This selective copying approach maintains the ability to recover original content while minimizing the data that needs to be stored and processed.
Data Source
AI summary
The present invention concerns a method of encoding a media bitstream of a media content. The media bitstream comprises a payload portion for the media content, and an overhead portion, different from the payload portion. The method comprises the steps of: modifying a part of the payload portion of the media bitstream, the modified part representing a region of the media content; and inserting the said part, as unmodified, into the overhead portion of the modified media bitstream for later reconstruction of the unmodified payload portion, such that the modified part in the media bitstream can be decoded without decoding the part as unmodified from the overhead portion. The invention also relates to a method of decoding, to an encoder and to a decoder.