Physical Layer Signalling Type Indicators for Digital Broadcast Flexibility
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Solution Overview
Problem
The existing digital broadcast standards, particularly DVB-T2, lack sufficient flexibility and information in physical layer signalling to support new features and settings, leading to inefficient encapsulation and processing of input streams.
Innovation Solution
The proposed solution involves enhancing physical layer signalling by introducing a type indicator for each physical layer pipe, which specifies the format of the input stream (e.g., transport stream, generic stream, IP stream) and indicates whether header or content compression is applied, thereby improving flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing physical layer signalling in DVB-T2 is used, then backward compatibility is maintained, but flexibility and information for supporting new features are insufficient
Solution Approach 1:
The input stream is segmented into user packets with distinct headers, and the signalling is segmented into type indicators that specifically identify stream formats and compression methods. This segmentation allows the system to handle different stream types (transport stream, generic stream, IP stream) individually with appropriate compression techniques, thereby increasing flexibility while maintaining clear signalling information.
Solution Approach 2:
The invention introduces new parameters (type indicators) that specify input stream format and compression method. By adding these parameters to the physical layer signalling, the system can adapt to new stream formats and compression techniques without changing the fundamental DVB-T2 structure, thus improving versatility while preserving backward compatibility.
2Productivity
If header compression is applied to user packets, then transmission efficiency is improved, but complexity of processing increases
Solution Approach 1:
The invention introduces compression type indicators as parameters that specify which compression method is applied to user packet headers. By explicitly signalling the compression method used, the receiver can efficiently process compressed data without needing to detect or guess the compression type, thereby improving transmission efficiency while keeping processing complexity manageable through parameter-based control.
3Adaptability or versatility
If multiple stream formats are supported, then versatility is improved, but device complexity increases
Solution Approach 1:
The invention segments the signalling approach by introducing specific type indicators for different stream formats (transport stream, generic stream, IP stream). This segmentation allows the system to support multiple formats by identifying them individually through type indicators, rather than requiring a single complex processing path for all formats, thus improving versatility while managing system complexity.
Data Source
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AI summary
The present invention relates to a physical layer signalling in a digital broadcast network. In particular, for a digital broadcast network supporting a configuration with a plurality of physical layer pipes, a type indicator is signalled on physical layer for a pipe, the type indicator indicates the format of the input stream which may specify a transport stream, a generic stream or an IP stream. In addition, per physical layer pipe application of header and/or content compression to the user packet headers of the input stream is signalled. Another physical layer parameters are advantageously provided or extended in order to increase the flexibility and efficiency of the layer 1 signalling.