Reception Device Emergency Warning Service Auto-Start
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Solution Overview
Problem
Current broadcasting schemes lack a means for receivers to identify and automatically start up emergency warning services provided by broadcasting stations, as there is no explicit method to specify services operating emergency warnings, making it difficult to provide an emergency warning service suited to actual operation.
Innovation Solution
Incorporating emergency warning notice information as physical layer signaling and monitoring information as upper layer signaling, allowing receivers to automatically start up and specify services when emergency warning information is detected, using DVB-T2 standard's L1-post signaling and IN-BAND signaling to include emergency warning flags and descriptors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency warning information is transmitted using existing DVB-T2 standards, then the broadcasting system maintains compatibility with current receivers, but receivers cannot automatically identify and start up emergency warning services
Solution Approach 1:
The patent introduces an intermediary mechanism (emergency warning flag in L1-post signaling and emergency warning monitor descriptor in upper layer signaling) that mediates between the transmitted emergency warning information and the receiver's service identification process. This intermediary enables receivers to automatically detect and identify emergency warning services without requiring complex decoding of broadcast data, thus resolving the contradiction between reliable service delivery and ease of automatic operation.
2Reliability
If receivers monitor all broadcast services for emergency warnings, then no emergency warning is missed, but power consumption and processing load increase significantly
Solution Approach 1:
The patent extracts the emergency warning indication from the main broadcast data stream and places it in the L1-post signaling layer, which is always decoded by receivers. This extraction allows receivers to monitor for emergency warnings using minimal processing power without needing to decode entire broadcast services, thus resolving the contradiction between reliable emergency warning detection and low power consumption.
Solution Approach 2:
The patent implements preliminary action by including emergency warning flags in L1-post signaling that is processed before full service decoding. Receivers can check this preliminary indicator first, and only if present, proceed to decode the specific emergency warning service. This preliminary screening mechanism reduces overall processing load and power consumption while maintaining reliable emergency warning detection.
3Loss of information
If emergency warning information is embedded in broadcast data requiring full decoding, then comprehensive service information is available, but response time is delayed
Solution Approach 1:
The patent segments emergency warning information into two parts: a quick indicator (flag) in L1-post signaling for immediate detection, and detailed service information in upper layer signaling for subsequent processing. This segmentation allows receivers to immediately detect emergency warnings through the flag without waiting for full broadcast data decoding, thus resolving the contradiction between information completeness and response time.
Solution Approach 2:
The patent performs preliminary action by pre-positioning emergency warning flags in the L1-post signaling layer, which is decoded before service-specific data. This preliminary placement of critical information enables immediate emergency warning detection without requiring time-consuming full broadcast decoding, while still maintaining access to complete service information when needed.
Data Source
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AI summary
The present technology relates to a reception apparatus, a reception method, a transmission apparatus, and a transmission method permitting provision of an emergency warning service more suited to actual operation. Provided is a reception apparatus including a reception section and a demodulation section. The reception section receives a physical layer frame transported as a broadcast signal on the basis of monitoring information that is included in upper layer signalling, signalling in a layer higher than a physical layer, and that is used to monitor a specific service. The demodulation section demodulates physical layer signalling acquired from the physical layer frame and monitors whether emergency warning information has been transported on the basis of emergency warning notice information acquired as a result of the demodulation. In the case where the emergency warning notice information indicates that the emergency warning information has been transported, the reception apparatus starts up automatically. The present technology is applicable, for example, to a transport system for transporting a physical layer frame compliant with the DVB-T2 standard.