Extended Signaling Distribution in DVB-T2 Broadcast Systems
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Solution Overview
Problem
Digital Video Broadcasting (DVB) systems face challenges in efficiently distributing extended signaling data and maintaining error correction across different modulation schemes and error correcting codes, particularly in DVB-T2 standards, which require enhanced robustness and compatibility with traditional systems.
Innovation Solution
The solution involves distributing extended signaling data over multiple data frames, using dynamic signaling segments that are interleaved for time diversity, and applying error correction codes like BCH and LDPC to ensure robustness, while maintaining backwards compatibility through an extension field and signaling indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extended signaling data is transmitted using traditional single-frame methods, then system complexity is low, but robustness and error correction capability are insufficient
Solution Approach 1:
The extended signaling data is divided into multiple segments that are distributed across different data frames. Each segment contains a portion of the signaling information along with error correction codes, allowing the receiver to reconstruct the complete signaling data by combining segments from multiple frames. This segmentation approach enhances robustness against frame loss while managing system complexity through structured distribution.
Solution Approach 2:
Error correction codes are pre-calculated and embedded into the signaling segments before transmission. The systematic information and redundancy data are prepared in advance and distributed across frames, enabling the receiver to correct errors without requiring complex real-time processing. This preliminary encoding reduces the computational burden during reception while maintaining high reliability.
2Reliability
If signaling data is distributed over multiple data frames, then error correction capability is improved, but time delay and synchronization complexity increase
Solution Approach 1:
The signaling segments are distributed periodically across data frames with regular intervals. Each frame contains signaling segments that can be independently decoded, allowing the receiver to start processing as soon as sufficient segments are received rather than waiting for all frames. This periodic distribution pattern reduces effective time delay while maintaining error correction capability through the structured timing of segment delivery.
3Adaptability or versatility
If backwards compatibility is maintained with traditional systems, then system versatility is improved, but the efficiency of extended signaling transmission is reduced
Solution Approach 1:
The signaling distribution system is designed to serve multiple functions: it can transmit both traditional signaling data and extended signaling data using the same infrastructure. The system automatically adapts its transmission mode based on the capabilities of receiving devices, allowing efficient extended signaling transmission when needed while maintaining compatibility with traditional systems that require simpler processing. This multi-functionality resolves the conflict between versatility and efficiency.
Data Source
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AI summary
Aspects of the invention provide apparatuses, computer media, and methods for supporting the broadcast of extended signaling data over a network. With an aspect of the invention, all of the extended signaling data may be distributed over multiple data frames. With another aspect, only dynamic signaling redundancy data is distributed over different data frames, where systematic information (for example, configurable signaling data) is transmitted in accordance with traditional systems. In addition, backwards compatibility with traditional systems may be supported, in which extended signaling is contained in an extension field. Error correction code may be applied to the extended signaling in concert with different codes. With another aspect, only extended signaling is supported without backwards compatibility with traditional systems.