Audiovisual Stream Packetization for Secure Content Distribution
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Solution Overview
Problem
Existing digital audiovisual stream protection systems based on digital key encryption are vulnerable to unauthorized decryption and reversion to a usable form, allowing pirating of content even when disconnected from the network.
Innovation Solution
A process and system that packetizes original audiovisual streams into flexible packets, analyzes the stream to generate a modified main stream and complementary information, and transmits them separately, allowing secure reconstruction of the original stream using a client-server mechanism with a PES format-based analysis and scrambling module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital key encryption is used to protect audiovisual streams, then the content is encrypted and cannot be immediately used, but the encrypted stream still contains all original information and can be reversed by ill-intentioned users
Solution Approach 1:
The patent divides the original audiovisual stream into two separate components: a modified main stream with substituted packets and complementary information containing the original data. This segmentation ensures that neither component alone can be used to reconstruct the original content, thereby preventing unauthorized reversal while maintaining content protection.
Solution Approach 2:
The patent extracts essential original packets from the main stream and places them in a separate complementary information component. By taking out these critical packets and transmitting them through a different channel, the system prevents unauthorized users from obtaining complete original information from a single source.
2Reliability
If all packets are encrypted to protect content, then security is improved, but the calculation time for encryption increases significantly
Solution Approach 1:
The patent applies partial encryption by only encrypting specific critical packets and placing them in the complementary information component, rather than encrypting the entire main stream. This partial action approach maintains security for essential data while significantly reducing the overall calculation time required for encryption.
Solution Approach 2:
The patent applies different processing qualities to different parts of the stream: the main stream receives modified packet substitution with selective encryption, while only specific critical packets in the complementary information receive full encryption. This local quality differentiation optimizes both security and processing efficiency.
3Reliability
If the original stream is transmitted in encrypted form, then protection is provided, but the stream contains all original information that can be processed to return to usable form
Solution Approach 1:
The patent segments the original stream into modified main stream packets and complementary information packets, transmitting them through separate channels. This segmentation ensures that pirating attempts can only access partial information, making it impossible to reconstruct the complete original content for unauthorized use.
Solution Approach 2:
The patent introduces an intermediary processing step where original packets are substituted with modified packets in the main stream, while the original data is relocated to complementary information. This intermediary transformation prevents direct access to original content while maintaining the ability to reconstruct it through authorized combination.
Data Source
AI summary
A process for secure distribution of original digital audiovisual streams including audio, video components or other data, including packetizing the original stream into packets that can be manipulated and have a flexible size, wherein each packet includes a header containing information about the packet and a useful load including part of the data of the stream, analyzing the packetized stream prior to transmission to client equipment to generate a main stream in conformity with a packetized format of the original stream, modified in that all or part of the packets were substituted by packets of the same structure, but whose content was modified, and generating complementary information with any format suitable to permit reconstruction of the original stream, and separately transmitting the modified main stream and complementary information generated from the server to addressed equipment.