Broadcast Signal Transmission via OFDM Data Pipe Segmentation
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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 reliable mobile and indoor reception.
Innovation Solution
The method involves encoding service data into multiple data transmission paths, building signal frames using an OFDM scheme with a modulated preamble, and transmitting these frames to enable efficient data multiplexing and reception across the same RF signal bandwidth, utilizing MIMO systems for improved robustness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals include larger amounts of video/audio data and additional data, then service quality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments broadcast data into multiple data pipes (DP0, DP1, DP2, etc.), each carrying different service components (video, audio, EPG, etc.). This segmentation allows parallel transmission of multiple data streams simultaneously, improving overall transmission efficiency while maintaining high data capacity. Each data pipe can be independently modulated and transmitted, resolving the contradiction between large data volume and transmission efficiency.
2Adaptability or versatility
If multiple broadcast services are multiplexed in time domain, then network flexibility is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal data pipe structure that can carry multiple types of broadcast services (terrestrial, mobile, indoor) through the same transmission medium. The data pipe framework is designed to be multi-functional, accommodating different service types without requiring separate transmission systems, thus improving network flexibility while managing system complexity through standardization.
Solution Approach 2:
The patent implements dynamic service mapping where data pipes can be dynamically allocated and configured based on service requirements. The system can adaptively adjust which data pipes carry which services, enabling flexible multiplexing of multiple broadcast services in the time domain while managing complexity through programmable control rather than fixed hardware configurations.
3Reliability
If MIMO system is used to improve robustness, then reception reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines MIMO transmission technology with the data pipe multiplexing framework, merging multiple spatial streams into the existing data pipe structure. By integrating MIMO with the established data pipe architecture rather than implementing it separately, the system improves reception reliability through spatial diversity while managing device complexity through unified processing and shared hardware resources.
Data Source
AI summary
A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, a frame builder for building at least one signal frame included in a super frame, wherein each of signal frames includes the encoded service data and the encoded signaling data, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme, wherein each of the modulated signal frame includes a preamble having basic transmission parameters, wherein a length of the preamble is extendable and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.