Digital Broadcast Framing and Multiplexing for Robust Supplemental Data
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Solution Overview
Problem
Digital broadcasting systems face challenges in transmitting supplemental data due to noise and ghost effects, which can cause errors in data transmission, especially in indoor or mobile environments, and require a system that is resistant to these issues while maintaining compatibility with conventional video/audio data receivers.
Innovation Solution
A digital broadcasting system that processes data by grouping enhanced data into frames, performing error correction and detection encoding, and multiplexing with main data to enhance transmission robustness, using methods like RS encoding and CRC encoding, and error correction decoding at the receiving end to ensure reliable data delivery.
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 receivers, but the receiving performance deteriorates in poor channel environments due to noise and ghost effects
Solution Approach 1:
The transmission channel is segmented into different time slots: one for conventional video/audio data and another for supplemental data. This allows conventional receivers to ignore the supplemental data portion while enhanced receivers can extract and process the supplemental data independently, maintaining compatibility while improving reliability for data transmission.
Solution Approach 2:
An intermediary processing layer is introduced that includes error detection and correction codes specifically designed for supplemental data. This intermediary mechanism protects the supplemental data from noise and ghost effects while maintaining the original transmission channel structure.
2Reliability
If error correction and detection encoding is performed on enhanced data before transmission, then the error rate in supplemental data is reduced, but the device complexity increases due to additional encoding processes
Solution Approach 1:
The system changes the parameter of error protection by applying different levels of error correction and detection encoding to different types of data. Supplemental data receives robust error correction coding while video/audio data uses conventional encoding, optimizing reliability for data without unnecessarily complicating the overall system.
3Reliability
If additional encoding is performed on enhanced data to improve receiving performance, then the robustness against noise and ghost effects is enhanced, but the transmission time increases due to longer processing
Solution Approach 1:
The transmission uses periodic time-division multiplexing where enhanced data with additional encoding is transmitted in dedicated time slots separated from video/audio data. This periodic structure allows the system to manage the trade-off between encoding complexity and transmission time by allocating specific intervals for robust data transmission.
Data Source
AI summary
A digital broadcasting system including a transmitting system and a receiving system, and a method of processing data are disclosed. A method of processing data of a transmitting system includes sequentially grouping N number of columns (Kc) configured of A number of enhanced data bytes having information included therein, thereby creating a frame having a size of N (rows)*Kc (columns), wherein N and A are integers, encoding the created frame, and multiplexing and transmitting enhanced data included in the encoded frame and main data.