DTV Broadcast Data Encoding for Noise-Resistant Supplemental Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current digital television systems face challenges in transmitting supplemental data due to signal degradation caused by noise and ghost effects, particularly in indoor environments, which can lead to errors in critical data such as program execution files and stock information, necessitating a system resistant to noise and compatible with conventional video/audio data transmission systems.
Innovation Solution
A digital television transmitting system that includes an encoder, randomizer, block processor, group formatter, deinterleaver, and packet formatter to perform additional encoding and multiplexing of enhanced data, ensuring robustness against noise and channel changes, while maintaining compatibility with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If supplemental data is transmitted through the same channel as video/audio data using time-division method, then the broadcast system maintains compatibility with conventional receiving systems, but the receiving performance deteriorates in poor channel environments due to noise and ghost effects
Solution Approach 1:
The patent segments the data transmission by separating enhanced data from main data (video/audio) into distinct data groups. Each data group contains only enhanced data or main data, allowing independent processing and error correction strategies for each segment, thereby improving reliability without affecting system compatibility
Solution Approach 2:
The patent applies preliminary error correction encoding to enhanced data before transmission. By pre-processing the enhanced data with robust error correction codes and inserting it into specific data groups, the system prepares the data to withstand noise and ghost effects before reception, improving receiving performance in poor channel environments
2Reliability
If additional encoding is applied to enhanced data, then resistance to noise and channel changes improves, but device complexity increases
Solution Approach 1:
The patent applies different encoding strategies to different types of data. Enhanced data receives additional error correction encoding and is placed in specific data groups, while main data uses standard encoding. This localized application of enhanced processing only where needed (for critical enhanced data) improves noise resistance without unnecessarily complicating the entire system
Solution Approach 2:
The patent introduces data groups as intermediary structures that organize and protect enhanced data. These data groups act as containers that apply specific error correction and processing rules, serving as an intermediary layer between the enhanced data and the transmission channel, thereby improving reliability while managing complexity through structured organization
Data Source
AI summary
A DTV transmitting system includes an encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The encoder codes enhanced data for error correction, permutes the coded data, and further codes the permuted data for error detection. The randomizer randomizes the coded enhanced data, and the block processor codes the randomized data at an effective coding rate of 1/H. The group formatter forms a group of enhanced data having data regions, and inserts the coded enhanced data into at least one of the data regions. The deinterleaver deinterleaves the group of enhanced data, and the packet formatter formats the deinterleaved data into corresponding data bytes.