DVB-T2 Global Stream Content Replacement via Transport Extraction
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Solution Overview
Problem
Current digital terrestrial television broadcasting technologies, particularly DVB-T2, face challenges in efficiently replacing main content with secondary content while maintaining synchronization and structure integrity in Single Frequency Networks (SFN), leading to issues like dropout and limited flexibility in content management.
Innovation Solution
A method for processing a global stream by extracting and replacing main content with secondary content at the transport stream level, involving time shifting and alignment of reference packets to ensure deterministic reconstruction of the modified stream, maintaining the same structure as the original stream, thus allowing transparent content modification without requiring network head modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If content replacement is performed at the transport stream level in DVB-T2 networks, then content flexibility and management are improved, but synchronization accuracy and SFN broadcasting guarantees deteriorate
Solution Approach 1:
The patent segments the content replacement process into distinct operational phases: extracting the transport stream, replacing content at the packet level, time-shifting the modified stream, and aligning reference packets. This segmentation allows each phase to be optimized independently, ensuring content flexibility while maintaining synchronization through the alignment phase that restores temporal relationships.
Solution Approach 2:
The patent applies preliminary action by time-shifting the modified transport stream before final integration. This preliminary time-shift operation creates a buffer that allows the system to perform content replacement without immediately disrupting synchronization, as the time-shifted stream can be aligned with reference packets from the original stream structure.
2Manufacturing precision
If time shifting and alignment operations are performed on the global stream, then content replacement accuracy is improved, but processing time and system complexity increase
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of reference packets that serve as mediators between the original and modified streams. These reference packets enable alignment without requiring complex comparison algorithms, as they provide direct temporal anchors that simplify the synchronization process.
Solution Approach 2:
The patent changes temporal parameters through controlled time-shifting operations. By adjusting the timing of the modified transport stream relative to the original stream structure, the system achieves accurate content replacement while managing processing complexity through parameter-based control rather than complex algorithmic approaches.
3Reliability
If the global stream structure is maintained identical to the original stream, then SFN broadcasting compatibility is improved, but content modification flexibility deteriorates
Solution Approach 1:
The patent extracts the transport stream from the global stream structure, performs content replacement on the extracted stream, and then re-integrates it while maintaining the original global stream structure. This extraction and re-integration process allows content modification flexibility while preserving SFN broadcasting compatibility through structural fidelity.
Solution Approach 2:
The patent applies a nested structure where the modified transport stream is contained within the unchanged global stream framework. The transport stream acts as a nested component that can be independently modified while the outer global stream structure remains identical, ensuring both content flexibility and SFN compatibility.
4Ease of operation
If content replacement is performed without network head modifications, then system simplicity and ease of operation are improved, but processing time and bandwidth requirements increase
Solution Approach 1:
The patent enables self-service content replacement at the broadcast site level without requiring modifications at the network head. The system performs extraction, replacement, time-shifting, and alignment operations locally, making the process autonomous and simple to operate while managing processing time through efficient local processing.
Data Source
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AI summary
The invention relates to a method for processing an original global stream, outputting a modified global stream, said original global stream being emitted by a head-end and intended for a plurality of broadcast sites, and including at least one physical layer tunnel encapsulating a transport stream. According to the invention, such a method implements the following steps: receiving (11) said original global stream; for at least one physical layer tunnel of said original global stream, referred to as the original tunnel: extracting (12) the transport stream encapsulated in said original tunnel, referred to as the original transport stream; obtaining (13) a modified transport stream; time-shifting (14) said original global stream; aligning (15) said modified transport stream with said original global stream obtained after time-shifting; and replacing (16) said original transport stream with said modified transport stream in the original tunnel.