Broadcast Signal Transmitter Data Pipe Segmentation
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting and receiving large amounts of data, particularly in providing high-definition images and additional services, while ensuring robustness and flexibility, especially for mobile reception equipment.
Innovation Solution
The method involves FEC encoding data pipes, interleaving and mapping signaling data with OFDM modulation to transmit broadcast signals, allowing for flexible service classification and error correction, enabling efficient transmission and reception of multiple services through the same RF signal bandwidth.
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 quality and functionality are improved, but data transmission efficiency and network robustness deteriorate
Solution Approach 1:
The broadcast signal is segmented into multiple data pipes (DP0, DP1, DP2, etc.), each carrying different types of data (video, audio, service information). This segmentation allows parallel transmission of multiple data streams with different QoS requirements, improving overall transmission efficiency while maintaining service quality
Solution Approach 2:
The patent introduces a new dimension of data organization by classifying data into multiple service components (e.g., video layer, audio layer, service information) and transmitting them through separate data pipes. This dimensional classification enables efficient resource allocation and improves transmission efficiency for large amounts of data
2Productivity
If multiple broadcast services are transmitted through the same RF bandwidth, then spectrum utilization is improved, but service quality and reliability deteriorate
Solution Approach 1:
Multiple broadcast services are segmented into separate data pipes with independent QoS parameters. Each service (e.g., HD video, SD video, audio, data services) is transmitted through dedicated data pipes, ensuring service quality while utilizing the same RF bandwidth efficiently
Solution Approach 2:
Different QoS characteristics are applied to different data pipes based on service requirements. For example, video data pipes use higher modulation orders and coding rates, while audio data pipes use more robust modulation, ensuring each service receives appropriate quality of service
3Adaptability or versatility
If mobile reception equipment is supported, then system flexibility and adaptability are improved, but reception robustness and error resistance deteriorate
Solution Approach 1:
The system dynamically adapts transmission parameters based on reception conditions. Mobile reception equipment can request and receive services with appropriate QoS settings, and the transmitter adjusts data pipe configurations to balance mobility support with reception robustness
Solution Approach 2:
QoS parameters such as modulation order, coding rate, and data pipe allocation are changed based on service type and reception conditions. This allows the system to optimize for mobile reception when needed while maintaining robustness for stationary receivers
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data transmission efficiency, improves robustness, and ensures quality of service for each broadcast service component, enabling error-free reception even with mobile equipment or in indoor environments.
Implementation Method 1
modulating the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplexing) scheme and transmitting the broadcast signal including the modulated at least one signal frame
Data Source
AI summary
A broadcast signal transmitting device according to one embodiment of the present invention comprises: an encoder for forward error correction (FEC) encoding data pipe (DP) data transmitted via multiple DPs, wherein each DP transmits at least one service or at least one service component; a signaling encoder for encoding signaling data; an interleaver for interleaving the encoded DP data; a frame builder for mapping the interleaved DP data and the encoded signaling data and then generating at least one signal frame, wherein the interleaved DP data is mapped according to the type of the DPs transmitting the respective DP data, and wherein the encoded signaling data includes type information indicative of the type of each DP; a modulation unit for modulating the at least one generated signal frame in an orthogonal frequency division multiplexing (OFDM) scheme; and a transmitter for transmitting a broadcast signal including the at least one modulated signal frame.