Digital Broadcasting Signal Reception Using Time-Frequency Slicing
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Solution Overview
Problem
Current digital broadcasting technologies face challenges in efficiently transmitting and receiving high-definition video and audio signals, particularly in managing increased data volumes and error correction, which affects the quality and reliability of broadcast services.
Innovation Solution
The method employs a signal transmission and reception system using a time-frequency slicing scheme with pilot signals, error correction coding, and interleaving techniques to improve data transmission efficiency and error correction capabilities, allowing for multiple services to be transmitted over several RF channels, thereby enhancing data transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data broadcast services require simple asynchronous end-to-end delivery through DVB compliant broadcast networks, then the system complexity is reduced, but the data transmission efficiency and error correction capability are insufficient for high-definition video and audio signals
Solution Approach 1:
The patent segments the data transmission process into multiple components: signal frames are divided into multiple tones (OFDM modulation), each tone carrying specific data bits. The service data is further segmented into multiple code blocks that are distributed across different tones and time slots, enabling efficient transmission of high-definition content while maintaining manageable system complexity through structured organization
Solution Approach 2:
The patent introduces frequency diversity by distributing data across multiple OFDM tones (frequency components). Instead of transmitting all data on a single carrier, the system spreads data across many frequency bins, adding a frequency dimension to the transmission. This enables better error correction and maintains efficiency for high-definition services
2Adaptability or versatility
If the number of broadcasting channels and data size are increased to meet user requirements, then the service quality is improved, but the error correction capability and transmission reliability deteriorate
Solution Approach 1:
The patent merges multiple code blocks containing service data with forward error correction (FEC) information into a unified transmission structure. The FEC blocks are combined with data blocks and distributed across multiple tones and time slots, allowing the system to handle increased data volumes from multiple HD channels while maintaining transmission reliability through integrated error correction
Solution Approach 2:
The patent introduces forward error correction codes as an intermediary between the service data and the transmission channel. The FEC mechanism acts as a mediator that adds redundancy information, enabling the receiver to correct errors without requesting retransmission. This intermediary layer allows the system to support multiple HD channels and maintain reliability despite increased data load
3Reliability
If error correction coding is applied to service data, then the error correction capability is improved, but the data transmission efficiency decreases due to overhead
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different data portions. Not all data is treated equally with full error correction; instead, the system identifies critical data blocks and applies FEC selectively to those that require protection. The code block structure allows varying levels of error correction based on local data importance, maintaining efficiency while providing necessary reliability
Solution Approach 2:
The patent implements partial error correction by adding only the necessary amount of FEC redundancy to achieve acceptable error rates. Rather than applying maximum error correction to all data (which would excessive action and severely reduce efficiency), the system calculates and applies just enough FEC to handle expected channel conditions, balancing reliability and transmission efficiency
Data Source
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AI summary
The present invention relates to method of transmitting and receiving signal and apparatus thereof. In one aspect of the present invention, the method of receiving a signal, includes receiving a signal transmitted from a specific radio frequency (RF) channel, demodulating the received signal, parsing a signal frame of the demodulated signal and obtaining a physical layer pipe (PLP) located in a layer-1 information region of a second pilot signal, from the signal frame.