Hybrid Broadcast Signal Transmission via PLP Segmentation
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in supporting high-definition images and additional services, especially in mobile and indoor reception environments.
Innovation Solution
A hybrid broadcasting system that utilizes terrestrial networks and the Internet, employing signaling methods and protocols like MMTP, ROUTE, and DASH to process and transmit broadcast signals, ensuring quality of service and flexibility through the same RF signal bandwidth, enabling error-free reception with mobile devices and in indoor environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals transmit large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The broadcast signal is divided into multiple physical layer pipes (PLPs), each capable of carrying different types of data (video, audio, additional services). This segmentation allows efficient resource allocation and transmission optimization for different data types, improving overall transmission efficiency while maintaining full service functionality.
2Manufacturing precision
If digital broadcast system provides HD images and additional services, then service quality is improved, but robustness of transmission/reception networks deteriorates
Solution Approach 1:
Different robustness characteristics are assigned to different PLPs based on their service requirements. Critical services (e.g., HD video) receive higher protection levels through forward error correction, while less critical additional services use lower protection levels. This local differentiation maintains high service quality for essential content while improving overall network robustness.
3Ease of operation
If broadcast system supports mobile reception equipment, then reception accessibility is improved, but network flexibility deteriorates
Solution Approach 1:
The system dynamically adjusts transmission parameters including modulation schemes, coding rates, and PLP configurations based on reception conditions. For mobile reception, the system can switch to more robust but less efficient modes, while for fixed reception, it uses higher-order modulation for greater capacity. This dynamic adaptation maintains reception accessibility across different scenarios while preserving network flexibility.
Data Source
AI summary
A broadcast signal reception method comprises the steps of: receiving, via a broadcast network, a broadcast signal which includes service data for a service and signaling data; establishing a WebSocket connection with a server on the basis of URL information; and receiving a message including an event via WebSocket.