Broadcast Signal Transmission Using Data Pipe Segmentation and BICM
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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 mobile reception.
Innovation Solution
The development of an apparatus and method for transmitting and receiving broadcast signals as multiplex data, using techniques such as Bit Interleaved Coding and Modulation (BICM), Orthogonal Frequency Division Multiplexing (OFDM), and error correction, to efficiently manage and process data across different broadcast services within the same RF signal bandwidth.
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, additional services). This segmentation allows efficient resource allocation and transmission optimization for different data types, resolving the contradiction between providing diverse services and maintaining transmission efficiency.
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 Bit Interleaved Coding and Modulation (BICM) with adjustable coding rates and modulation schemes. By dynamically changing these parameters based on channel conditions, the system maintains high service quality for HD images and multi-channel audio while ensuring network robustness through adaptive error correction.
3Adaptability or versatility
If digital broadcast systems support mobile reception equipment, then network flexibility is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent implements dynamic parameter adjustment in the BICM module, allowing coding rates and modulation schemes to adapt in real-time based on mobile reception conditions. This dynamic approach enables the system to maintain transmission reliability while supporting flexible mobile reception across varying channel qualities.
4Productivity
If multiple broadcast services are transmitted in the same RF bandwidth, then spectrum efficiency is improved, but signal complexity deteriorates
Solution Approach 1:
The patent merges multiple broadcast services into a unified OFDM signal structure transmitted within the same RF bandwidth. By combining video, audio, and additional services into a single multiplexed signal with standardized frame structure and modulation, the system achieves high spectrum efficiency while keeping receiver complexity manageable through unified processing.
Data Source
AI summary
Disclosed is an apparatus for transmitting a broadcast signal, including: an input formatting module configured to demultiplex an input stream into at least one Data Pipe (DP); a BICM (Bit Interleaved Coding and Modulation) module configured to perform error correction processing on data of the DP; a frame building module configured to map the data of the DP to symbols within a frame; an OFDM generation module configured to generate a transmission signal by inserting a preamble into the frame and performing OFDM modulation; and a transmission parameter control module configured to set at least one transmission parameter and control transmission signal processing of the frame building module and the OFDM generation module.