Broadcast Signal Reception Using Link Information for NRT Services
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Solution Overview
Problem
Existing digital TV broadcasting systems lack efficient methods for delivering additional information on broadcast channels or programs beyond basic video and audio, limiting user interaction and service offerings.
Innovation Solution
A method and device for transmitting and receiving broadcast signals that include generating and transmitting a broadcast stream with program table information, which contains link information for accessing additional information via non-real-time (NRT) service or Internet service, allowing users to select and play various types of additional content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If additional information is delivered through the broadcast stream, then information completeness is improved, but transmission bandwidth is consumed
Solution Approach 1:
The patent segments information delivery into two parts: essential program information is delivered through the broadcast stream, while additional information is delivered separately through NRT service or Internet service. This segmentation allows the broadcast stream to remain bandwidth-efficient while still providing access to comprehensive information through multiple channels.
Solution Approach 2:
The patent introduces link information as an intermediary element within the broadcast stream that points to additional information available through NRT or Internet services. This intermediary approach allows the broadcast stream to reference external resources without directly transmitting all additional content, thus conserving bandwidth while maintaining information accessibility.
2Adaptability or versatility
If additional information is transmitted through broadcast stream, then service functionality is improved, but transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic information delivery where the system adapts to different service requirements by selectively delivering information through appropriate channels. Real-time program information is delivered via broadcast stream, while non-real-time additional information is delivered through NRT or Internet services, optimizing transmission efficiency for each type of content.
Solution Approach 2:
The patent creates a universal information delivery framework that can handle multiple types of information (program schedules, additional content, interactive data) through a single integrated system that routes different information types through the most efficient delivery channel, thereby improving overall service functionality without compromising transmission efficiency.
3Ease of operation
If link information is included in program table information, then user interaction is improved, but data structure complexity increases
Solution Approach 1:
The patent extracts link information as a separate, standardized element within the program table information structure. By defining a specific format for link information that points to NRT or Internet resources, the system enhances user interaction capabilities while maintaining a manageable and standardized data structure that can be processed efficiently by receiving devices.
Data Source
AI summary
Disclosed are a method and device for transmitting and receiving broadcast signals. The disclosed reception method comprises a step for extracting second program table information which indicates the association properties between a plurality of programs, the programs being obtained by using a broadcast stream which comprises at least one program, program table information which indicates the broadcast stream, and at least one broadcast service, from a received broadcast signal. The method further comprises a step for parsing the broadcast stream by using the extracted program table information; and a step for acquiring information about the groups to which the plurality of programs belong by using the extracted second program table information.