Hybrid Broadcast Signal Transmission via Parallel PLPs
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Solution Overview
Problem
Digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in supporting high-definition images, multichannel audio, and additional services, especially in mobile and indoor reception environments.
Innovation Solution
A system that supports future broadcast services by using hybrid broadcasting methods combining terrestrial networks and the Internet, enabling quality of service control and flexible transmission through the same radio frequency bandwidth, and allowing error-free digital signal reception even with mobile devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
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 data stream is segmented into multiple physical layer pipes (PLPs), each carrying different types of data (video, audio, additional services). This segmentation allows parallel transmission of multiple data streams simultaneously, improving overall transmission efficiency while maintaining the ability to deliver large amounts of data.
Solution Approach 2:
The system transitions from single-dimensional sequential data transmission to multi-dimensional parallel transmission by introducing the PLP dimension. Multiple PLPs can be transmitted concurrently over the same RF bandwidth, effectively adding a spatial/time dimension to data transmission and thereby improving efficiency.
2Manufacturing precision
If digital broadcast system provides HD images and multichannel audio, then service quality is improved, but robustness of transmission/reception networks deteriorates
Solution Approach 1:
Different PLPs are allocated with different modulation and coding schemes according to their specific requirements. Video data PLPs use higher order modulation for quality, while audio and additional service PLPs use more robust coding. This local optimization of transmission parameters maintains high image quality while ensuring overall network robustness.
Solution Approach 2:
The system dynamically changes transmission parameters (modulation order, coding rate, guard interval) for different PLPs based on channel conditions and service requirements. This allows the system to adapt to varying channel quality and maintain robustness while delivering high-quality HD video and multichannel audio.
3Adaptability or versatility
If digital broadcast system supports additional services, then service diversity is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The PLP framework provides a universal transmission structure that can carry various types of services (video, audio, data, interactive services) through the same mechanism. This multi-functionality allows the system to support diverse services without requiring separate transmission systems, thereby maintaining efficiency while enhancing service diversity.
4Adaptability or versatility
If hybrid broadcasting uses terrestrial networks and Internet, then network flexibility is improved, but system complexity deteriorates
Solution Approach 1:
The broadcast receiver includes an intermediary component that automatically selects between terrestrial broadcast network and Internet delivery paths based on service requirements and channel conditions. This intermediary abstraction layer simplifies the user interface while enabling flexible hybrid operation, managing the complexity internally rather than exposing it to users.
Data Source
AI summary
The present invention proposes a method for transmitting a broadcast signal. The method for transmitting a broadcast signal according to the present invention proposes a system which may support a next generation broadcast service, in an environment supporting next generation hybrid broadcast that uses a terrestrial broadcast network and an internet network. Further, the present invention proposes an efficient signaling method which can cover both the terrestrial broadcast network and the internet network, in an environment supporting next generation hybrid broadcast.