Broadcast Signal Transmission via 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 encoding Data Pipe (DP) data for broadcast services, mapping it to a constellation, time-interleaving, generating signal frames, inserting pilots based on service type, and OFDM-modulating using determined parameters to transmit broadcast signals efficiently across the same RF signal bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast systems transmit large amounts of data for HD images and additional services, then the data transmission capacity is improved, but the robustness of transmission/reception networks deteriorates
Solution Approach 1:
The broadcast data stream is segmented into multiple Data Pipes (DPs), each carrying different types of data (video, audio, additional services). This segmentation allows independent encoding and transmission of different data components, improving overall system robustness while maintaining high data transmission capacity.
Solution Approach 2:
The system dynamically adjusts transmission parameters including modulation schemes, coding rates, and pilot patterns based on channel conditions and service requirements. This allows the system to maintain robustness across varying data transmission demands by optimizing parameters for each specific transmission scenario.
2Manufacturing precision
If digital broadcast systems provide HD images and multi-channel audio, then the service quality is improved, but the data transmission efficiency deteriorates
Solution Approach 1:
The system performs preliminary encoding, mapping, and time-interleaving of Data Pipe data before transmission. Pilot signals are inserted in advance according to predetermined patterns. These preliminary actions organize and optimize the data structure, enabling efficient transmission of high-quality HD and multi-channel content without sacrificing transmission efficiency.
Solution Approach 2:
Different modulation and coding parameters are applied to different Data Pipes based on their service requirements. HD video content receives parameters optimized for high quality, while other services use parameters optimized for efficiency, allowing simultaneous high-quality delivery across multiple services.
3Adaptability or versatility
If the system transmits various broadcast services through the same RF signal bandwidth, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
Multiple broadcast services are segmented into separate Data Pipes that are multiplexed in the time domain within the same RF bandwidth. This segmentation approach enables flexible transmission of diverse services while maintaining manageable system complexity through structured organization.
Solution Approach 2:
The OFDM transmission system serves multiple functions by transmitting different broadcast services (fixed receiver, mobile receiver, HD, SD, additional services) through the same physical infrastructure and RF bandwidth, achieving multi-functionality without proportionally increasing complexity.
4Reliability
If pilot patterns are established differently according to broadcast service type, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Different pilot patterns are applied locally to different Data Pipes or service types based on their specific requirements. Mobile receiver services receive pilot patterns optimized for mobility, while fixed receiver services receive patterns optimized for stability. This localized differentiation improves reliability without requiring complete system redesign.
Solution Approach 2:
The system changes pilot pattern parameters (density, position, sequence) according to service type and channel conditions. This parameter adaptation improves reception reliability for each service category while maintaining a unified underlying signal processing framework, preventing excessive complexity increase.
Data Source
AI summary
An apparatus for transmitting a broadcast signal according to one embodiment of the present invention comprises: an encoder for encoding data pipe (DP) data corresponding to a DP which transmits at least one broadcast service or broadcast service component; a mapper for mapping the encoded DP data on a constellation; a time interleaver for time-interleaving the mapped DP data; a frame builder for generating at least one signal frame builder for generating at least one signal frame including the time-interleaved DP data; a pilot inserting unit for inserting signal frame, according to at least one pilot pattern; an OFDM modulator for OFDM-modulating the at least one generated signal frame using OFDM parameters; and a transmitter for transmitting at least one broadcast signal including the at least one modulated signal frame.