Digital Broadcast Receiver RS Framing for Stable Mobile Reception
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Solution Overview
Problem
The Vestigial Sideband (VSB) transmission mode used in digital broadcasting in North America and Korea is prone to performance deterioration in poor channel environments, especially when using portable or mobile receivers, due to limited resistance to channel changes and noise.
Innovation Solution
A digital broadcasting receiver and method that processes mobile service data and main service data by configuring a Reed Solomon (RS) frame with signaling information, including a table describing the second service data, and uses known data sequences for demodulation and channel equalization, enhancing reception stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VSB transmission mode is used for digital broadcasting, then the system can maintain compatibility with existing standards, but receiving performance deteriorates in poor channel environments and mobile conditions
Solution Approach 1:
The patent segments mobile service data into separate RS frames with dedicated signaling information zones, separating them from main service data. This segmentation allows independent error correction and processing of mobile service data, improving reliability in mobile conditions without affecting main service data transmission.
Solution Approach 2:
The patent introduces Reed Solomon (RS) frames as an intermediary structure that contains both mobile service data and main service data, with dedicated signaling information zones. This intermediary structure provides error correction capabilities and signaling mechanisms that protect against channel changes and noise, resolving the contradiction between maintaining VSB compatibility and improving mobile receiving performance.
2Adaptability or versatility
If VSB transmission mode is used, then standard compatibility is maintained, but resistance to noise and channel changes is reduced
Solution Approach 1:
The patent creates a universal RS frame structure that can handle both mobile service data and main service data within a single VSB transmission framework. The RS frames provide multi-functional error correction and signaling capabilities that work across different service types, maintaining standard compatibility while enhancing reliability through improved noise and channel change resistance.
3Productivity
If mobile service data are transmitted using VSB mode, then service delivery is enabled, but receiving stability deteriorates in mobile environments
Solution Approach 1:
The patent incorporates signaling information zones within RS frames before data transmission, providing preliminary error correction codes and signaling data. This preliminary action prepares the receiver with necessary correction mechanisms in advance, enabling stable reception of mobile service data in mobile environments while maintaining service delivery capability.
Data Source
AI summary
A method of processing broadcast data includes performing RS encoding and CRC encoding on mobile service data to generate an RS frame belonging to an ensemble including a signaling information table including access information of the mobile service data and identification information for identifying a stream where keys to decrypt the mobile service data are obtained, mapping a portion of data in the RS frame to a group including known data sequences, FIC data, and TPC data, wherein the FIC data includes information for rapid mobile service acquisition, and the TPC data includes FIC version information for indicating an update of the FIC data; and transmitting a broadcast signal including the group.