Broadcast Signal Data Pipe Segmentation for Robust Transmission
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and flexibility, particularly in handling large amounts of data and ensuring reliable reception, especially with mobile or indoor equipment.
Innovation Solution
The method involves formatting input streams into Data Pipes, applying Low-Density Parity-Check (LDPC) encoding, bit interleaving, mapping to QAM or Non-Uniform Constellations, and using Multi-Input Multi-Output (MIMO) encoding with Orthogonal Frequency Division Multiplexing (OFDM) for transmission, while receiving involves demodulation, de-mapping, and decoding to process data according to service characteristics and maintain Quality of Service (QoS).
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 HD images and multi-channel audio services are provided, but data transmission efficiency and network robustness need improvement
Solution Approach 1:
The broadcast data stream is segmented into multiple Data Pipes (DPs), each carrying different service components. This segmentation allows independent encoding and transmission of different data streams, improving both transmission efficiency and robustness through diversified error protection strategies for each pipe.
Solution Approach 2:
The system dynamically adjusts transmission parameters including code rate, modulation scheme (QAM order), and MIMO configuration based on channel conditions and service requirements. This enables optimal balance between data transmission rate and reliability for different broadcast services.
2Adaptability or versatility
If multiple broadcast services are transmitted, then service diversity is provided, but transmission system complexity increases
Solution Approach 1:
The transmission system uses a universal framework with Data Pipes that can carry different service types (HD, SD, mobile broadcast) through the same physical infrastructure. Multiple services share common transmission resources while maintaining service-specific characteristics through configurable parameters.
Solution Approach 2:
The system dynamically allocates resources and adjusts transmission parameters for different services based on real-time channel conditions and service priorities. Services can be added, removed, or reconfigured without changing the fundamental system architecture.
3Adaptability or versatility
If mobile reception equipment is used, then reception flexibility is improved, but signal robustness deteriorates
Solution Approach 1:
The system provides different levels of error protection and transmission parameters tailored to specific service requirements and reception scenarios. Mobile broadcast services receive enhanced robustness measures compared to fixed reception services, optimizing performance for each application.
Solution Approach 2:
The transmission system pre-configures multiple Data Pipes with different robustness levels and service types before transmission. Receivers can select appropriate service streams based on their capabilities and environmental conditions, ensuring optimal performance for mobile reception.
Data Source
AI summary
The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe, DP, data; Low-Density Parity-Check, LDPC, encoding the DP data according to a code rate; bit interleaving the LDPC encoded DP data; mapping the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC (Non-Uniform Constellation); Multi-Input Multi-Output, MIMO, encoding the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter; building at least one signal frame by mapping the MIMO encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.