Emergency Alert Table Frequency Descriptor for Channel Tuning
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Solution Overview
Problem
In terrestrial broadcasting systems, applying emergency alert system message protocols from cable digital TV to terrestrial broadcasting systems leads to channel number duplication and frequency changes by relay service providers, causing receivers to tune to incorrect channels during emergencies.
Innovation Solution
A method of transmitting digital broadcast signals with an emergency alert table that includes frequency or program number information, using descriptors to provide additional pointers for channel tuning, ensuring accurate channel selection during emergencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the emergency alert table defined for cable digital broadcasting is applied to terrestrial broadcasting system, then the emergency alert broadcast can be transmitted, but channel number information may be duplicated and receivers may tune to incorrect channels
Solution Approach 1:
The patent adds frequency information as an additional dimension to the channel identification system. Instead of relying solely on channel number pairs (major and minor channel numbers) that can be duplicated across different broadcasting stations, the system incorporates frequency information into the emergency alert table. This dimensional addition ensures that even if channel numbers are duplicated, the frequency information provides a unique identifier that prevents receivers from tuning to incorrect channels.
2Productivity
If relay service providers retransmit emergency alert broadcast, then emergency information can be distributed wider, but frequency changes may cause receivers to tune to wrong channels
Solution Approach 1:
The patent implements a feedback mechanism where the frequency information in the emergency alert table is updated and transmitted along with the emergency alert broadcast. When relay service providers retransmit the emergency alert, they include the current frequency information in the updated emergency alert table. This feedback loop ensures that receivers receive the most current frequency information and can accurately tune to the correct channel even when frequency changes occur during relaying.
3Productivity
If channel number information is used for emergency alert broadcast, then the emergency alert can be transmitted efficiently, but channel overlap with general channels cannot be prevented
Solution Approach 1:
The patent introduces frequency information as an intermediary element that mediates between the channel number identification system and the actual channel transmission. By adding frequency information to the emergency alert table, the system creates a more robust identification mechanism that can distinguish emergency alert channels from general channels even when channel numbers overlap. The frequency information acts as an additional identifier that prevents harmful channel overlap while maintaining transmission efficiency.
Data Source
AI summary
A method of processing a broadcast signal relevant to an emergency alert and a broadcast receiver for the same are disclosed, by which information on a channel for carrying an emergency alert broadcast can be prevented from being overlapped with information on other general channels. The present disclosure generating an emergency alert table including frequency information of an emergency alert channel, and transmitting a digital broadcasting signal including the emergency alert table, wherein the frequency information of the emergency alert channel is inserted in a descriptor that provides an additional pointer to the emergency alert channel, wherein the descriptor references the emergency alert channel by means of the frequency information.