Data Processing Device Time Signaling Accuracy ATSC3.0
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Solution Overview
Problem
In data transmission using the ATSC3.0 broadcasting method, errors in time accuracy arise from the physical layer frame's signaling, particularly in the symbol-aligned mode where frame lengths are not integer multiples of milliseconds, leading to undesirable rounding errors and reduced operational flexibility.
Innovation Solution
The data processing apparatus generates signaling with time information accuracy exceeding milliseconds, incorporating units of microseconds and nanoseconds, and processes this information to be included in the preamble of the physical layer frame, ensuring accurate time alignment even in symbol-aligned mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time information is transmitted with millisecond accuracy in ATSC3.0 physical layer framing, then the signaling structure remains simple, but time alignment errors occur in symbol-aligned mode where frame lengths are not integer multiples of milliseconds
Solution Approach 1:
The patent changes the time information precision parameter from millisecond-level to microsecond-level accuracy. By increasing the precision of time information in the signaling field, the system can accurately represent frame timing even when frame lengths are not integer multiples of milliseconds, thereby eliminating time alignment errors in symbol-aligned mode without complicating the signaling structure
2Adaptability or versatility
If frame lengths are made flexible in symbol-aligned mode, then operational flexibility improves, but time accuracy errors increase due to non-integer millisecond frame lengths
Solution Approach 1:
The patent applies preliminary action by pre-calculating and embedding accurate time information directly into the signaling field during frame generation. This preliminary inclusion of precise timing data ensures that even when frame lengths vary in symbol-aligned mode, the time information is already accurately represented before transmission, maintaining reliability while allowing frame length flexibility
Data Source
AI summary
The present technology relates to a data processing apparatus and a data processing method that can reduce errors of time arising from accuracy of time information.The data processing apparatus generates signaling including time information having accuracy of time according to a frame length of a physical layer frame and processes the signaling so as to be included into a preamble of the physical layer frame to make it possible to reduce errors of time arising from time information. The present technology can be applied, for example, to a transmitter compatible with a broadcasting method of ATSC3.0 and so forth.