Field Sync Signaling for Accurate Broadcast Receiver Demodulation
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Solution Overview
Problem
Existing digital broadcasting transmission systems do not effectively insert information necessary for receiver demodulation into sync signals, which hinders the receiver's ability to provide optimal reception performance.
Innovation Solution
A digital broadcasting transmission apparatus that performs turbo coding on a transport stream and inserts information for receiver demodulation into the reserved area of a field sync signal using a field sync signal generator, allowing for precise demodulation and improved reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information for receiver demodulation is not inserted into sync signals, then the transmission system maintains simplicity and compatibility with existing standards, but the receiver cannot obtain precise demodulation information resulting in suboptimal reception performance
Solution Approach 1:
The transmission apparatus inserts demodulation information into the field sync signal in advance before transmission. This preliminary action ensures that the receiver can obtain necessary demodulation parameters (such as turbo coding information, interleaving depth, pilot pattern) without requiring additional signaling or complex processing, thereby improving reception performance while maintaining system simplicity
Solution Approach 2:
The field sync signal serves dual purposes: it provides synchronization functionality for the receiver and simultaneously carries demodulation information. By making the sync signal multi-functional, the patent avoids adding separate information channels, thus improving reception performance without significantly increasing system complexity
2Measurement precision
If demodulation information is inserted into the reserved area of field sync signal, then the receiver can accurately acquire critical data for demodulation, but the sync signal structure becomes more complex
Solution Approach 1:
The patent inserts demodulation information into the reserved area of the field sync signal rather than modifying the entire signal structure. This localized approach allows the receiver to extract precise demodulation information from specific portions of the sync signal while maintaining the overall simplicity and standard compatibility of the sync signal structure
Data Source
AI summary
A digital broadcasting transmission apparatus and an inserting method of information for receiver demodulation thereof. The digital broadcasting transmission apparatus includes: a turbo coder performing turbo coding on a transport stream (TS) a field sync signal generator inserting information for receiver demodulation into a reserved area of a field sync signal; and a multiplexer adding the field sync signal into which the information for receiver demodulation has been inserted and a segment sync signal to the turbo coded TS to form a data frame. Accordingly, a reception apparatus can precisely determine the information for receiver demodulation and thus provides an improved reception performance.