Hybrid Broadcast Signaling via S-TSID and MPD Event Streams
Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, network robustness, and flexibility, particularly in supporting high-definition images and additional services, especially in mobile reception and hybrid broadcast environments.
Innovation Solution
A hybrid broadcast system combining terrestrial broadcast networks with Internet Protocol (IP) networks, utilizing protocols like MMTP and ROUTE/DASH for efficient data transmission, and implementing a signaling scheme to effectively deliver services such as electronic service guides and emergency alerts between primary and companion devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals include larger amounts of video/audio data and additional services, then service quality and functionality are improved, but data transmission efficiency deteriorates
Solution Approach 1:
The broadcast data stream is segmented into multiple physical layer pipes (PLPs), each carrying different types of data (video, audio, service information). This segmentation allows efficient multiplexing and targeted transmission optimization for different data types, resolving the contradiction between comprehensive service functionality and transmission efficiency.
Solution Approach 2:
The broadcast system implements a universal framework that can carry various types of data (HD video, audio, EPG, emergency alerts, interactive services) through a unified transmission infrastructure. The system uses common signaling mechanisms and protocol structures that adapt to different service types, enabling multi-functionality without proportionally increasing system complexity.
2Manufacturing precision
If digital broadcast systems provide high definition images and multi-channel audio, then service quality is improved, but network robustness deteriorates
Solution Approach 1:
The system dynamically adjusts transmission parameters including modulation schemes, coding rates, and interleaving depths based on service type and channel conditions. HD services use higher order modulation with appropriate forward error correction, while maintaining the ability to switch to more robust configurations when needed, thus achieving high quality without permanently compromising robustness.
Solution Approach 2:
The broadcast system implements prior cushioning through redundant signaling structures, error correction codes, and interleaving that are built into the transmission stream before delivery. Service information includes backup pathways and error detection mechanisms that protect against data loss, ensuring robustness is maintained even when transmitting high-quality HD content.
3Adaptability or versatility
If digital broadcast systems support additional services and data, then service versatility is improved, but device complexity deteriorates
Solution Approach 1:
Service information is segmented into distinct data streams and logical channels within the broadcast signal. The receiver can selectively tune to and process only the services and data types it needs, ignoring other portions of the multiplexed signal. This segmentation reduces the effective complexity at the receiver despite the presence of multiple services in the overall system.
4Productivity
If broadcast systems improve data transmission efficiency, then productivity is improved, but adaptability to mobile reception deteriorates
Solution Approach 1:
The system implements dynamic adaptability through adjustable transmission parameters that can be modified in response to mobile reception conditions. The broadcast system can dynamically change modulation schemes, coding rates, and PLP configurations based on detected channel conditions and receiver capabilities, maintaining efficient transmission while adapting to mobile environments.
Data Source
AI summary
A method of providing a broadcast service, the method includes generating service data for a broadcast service and Service Layer Signaling (SLS) for signaling the broadcast service; generating a signaling table having information used for indicating a transport session carrying the SLS for the broadcast service; and transmitting the service data, the SLS and the signaling table via a broadcast network, wherein the SLS includes a Service-based Transport Session Instance Description (S-TSID) and a Media Presentation Description (MPD), wherein the S-TSID includes information for indicating transport sessions carrying service components and content items for the broadcast service, the MPD includes a period element having an event stream element, the event stream element includes a plurality of event elements, and each of the event elements includes an event ID for an event and timing information for indicating start time of the event.