OFDM Broadcast Signal Reception with Data Pipe Multiplexing
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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 providing mobile reception with high definition images and additional services.
Innovation Solution
The development of an apparatus and method for transmitting and receiving broadcast signals using Orthogonal Frequency Division Multiplexing (OFDM) to demodulate, parse, and decode signals, allowing for multiplexing of data across different services within the same RF signal bandwidth, and employing Multiple Input Multiple Output (MIMO) systems for improved robustness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals transmit large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments broadcast data into multiple data pipes (DPs), each carrying different types of data (video, audio, service information). This segmentation allows efficient resource allocation and transmission optimization for each data type, resolving the contradiction between comprehensive service functionality and transmission efficiency.
Solution Approach 2:
The patent creates a universal data pipe structure that can carry multiple types of data (video, audio, subtitles, service information) through the same transmission framework. This multi-functional data pipe system improves transmission efficiency while maintaining comprehensive service capabilities.
2Adaptability or versatility
If digital broadcast systems provide HD images and multi-channel audio, then service quality is improved, but network robustness deteriorates
Solution Approach 1:
The patent employs Forward Error Correction (FEC) coding with variable code rates and modulation schemes (QPSK, 16-QAM, 64-QAM) that can be dynamically adjusted based on channel conditions. This allows the system to maintain high service quality while adapting to varying network robustness requirements.
Solution Approach 2:
The patent implements redundancy through FEC coding and multiple data pipe structures that provide error correction capabilities before data transmission errors occur, cushioning against network instability while maintaining high service quality.
3Ease of operation
If digital broadcast systems support mobile reception equipment, then reception accessibility is improved, but network flexibility deteriorates
Solution Approach 1:
The patent implements dynamic parameter adjustment for mobile reception, including variable modulation schemes and code rates that adapt to mobile device capabilities and channel conditions. This dynamic adaptation improves reception accessibility while maintaining network flexibility through configurable transmission parameters.
Data Source
AI summary
A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, a time deinterleaver to time deinterleave data in the parsed signal frame and a decoder to decode the time deinterleaved data.