Broadcast Signal Transmission via Data Pipe Segmentation and MIMO
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in handling large amounts of data and ensuring error-free reception, especially with mobile or indoor equipment.
Innovation Solution
The development of an apparatus and method for transmitting and receiving broadcast signals that multiplexes data from multiple services into a single RF signal bandwidth, using MIMO systems to enhance transmission efficiency and robustness, and classifies data by components to control Quality of Service (QoS) for each service, enabling flexible broadcast services including terrestrial, mobile, and UHDTV.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals transmit large amounts of video/audio data and additional data, then service quality improves, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments broadcast data into multiple data pipes, each carrying different types of data (video, audio, additional data). This segmentation allows efficient multiplexing and transmission of large data volumes through structured organization, resolving the contradiction between data quantity and transmission efficiency.
Solution Approach 2:
The patent introduces time-domain multiplexing as an additional dimension for data transmission. By transmitting different data streams at different time slots within the same frequency band, the system achieves high data transmission efficiency while maintaining the ability to transmit large amounts of diverse data.
2Adaptability or versatility
If digital broadcast systems provide HD images, multi-channel audio and additional services, then service functionality improves, but network robustness deteriorates
Solution Approach 1:
The patent applies different transmission parameters and error correction schemes to different data pipes based on their specific requirements. Critical data (e.g., video) receives stronger error protection, while less critical data (e.g., additional services) uses lighter protection, maintaining network robustness while supporting diverse services.
Solution Approach 2:
The system dynamically adjusts transmission parameters such as modulation schemes, coding rates, and error correction levels for different data pipes. This allows the network to maintain robustness under varying conditions while providing diverse service functionalities including HD video, multi-channel audio, and additional services.
3Ease of operation
If digital broadcast systems consider mobile reception equipment, then reception accessibility improves, but transmission reliability deteriorates
Solution Approach 1:
The patent employs dynamic transmission schemes that adapt to mobile reception conditions. The system adjusts modulation and coding parameters in real-time based on channel quality, enabling reliable transmission to mobile devices while maintaining reception accessibility in various environments.
Solution Approach 2:
The system incorporates robust error correction coding and redundancy mechanisms in advance of potential transmission errors. This beforehand cushioning ensures that even under mobile reception conditions with varying signal quality, transmission reliability is maintained while keeping reception accessible to mobile devices.
Data Source
AI summary
A method and an apparatus for transmitting broadcast signals thereof are disclosed. The method for transmitting broadcast signals comprises encoding DP (data pipe) data carrying at least one service, mapping the encoded DP data onto constellations, time interleaving the mapped DP data, building at least one signal frame including the time interleaved DP data, modulating data in the built at least one signal frame by an OFDM scheme and transmitting the broadcast signals having the modulated data, wherein the at least one signal frame includes emergency alert information.