Digital Broadcast Receiver TPC and FIC Signaling for Fast Channel Tuning
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Solution Overview
Problem
Digital broadcast receivers using the Vestigial Sideband (VSB) transmission mode face challenges in maintaining receiving performance, especially in poor channel environments and during mobile operations, due to limited resistance to channel changes and noise, and slow channel change times.
Innovation Solution
A digital broadcast receiver system that extracts transmission parameter channel (TPC) and fast information channel (FIC) signaling information to acquire program tables, enabling rapid channel tuning by detecting IP address information for virtual channels, thereby enhancing resistance to channel variations and noise, and significantly reducing channel change times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If VSB transmission mode is used for digital broadcasting, then data transmission efficiency is improved, but receiving performance deteriorates in poor channel environments and during mobile operations
Solution Approach 1:
The system performs preliminary channel estimation and equalization before data reception by extracting and processing pilot signals and TPC/FIC signaling information in advance. This allows the receiver to pre-adjust equalization parameters and prepare channel compensation mechanisms, improving receiving performance in mobile and poor channel environments while maintaining VSB transmission efficiency
2Device complexity
If conventional channel tuning methods are used in mobile digital broadcasting, then system simplicity is maintained, but channel change time increases considerably
Solution Approach 1:
The system extracts TPC and FIC signaling information and acquires program tables in advance during channel reception. This preliminary acquisition of channel mapping relations and IP address information allows for rapid channel switching without requiring complete system reconfiguration, significantly reducing channel change time while maintaining reasonable system complexity
Solution Approach 2:
The system uses TPC and FIC signaling information as intermediary data structures that contain pre-processed channel mapping and service information. These intermediaries enable fast channel switching by providing ready-to-use mapping relations between physical frequencies and virtual channels, eliminating the need for time-consuming channel scanning and configuration
Data Source
AI summary
A digital broadcast receiver and a control method thereof are disclosed. The control method of the digital broadcast receiver includes receiving a broadcast signal into which mobile service data and main service data are multiplexed, extracting TPC signaling information and FIC signaling information from a data group in the received mobile service data, acquiring a program table defining a mapping relation between each of all ensembles transmitted at a physical frequency and at least one virtual channel corresponding to the ensemble, using the extracted FIC signaling information, and detecting IP address information required for channel tuning to the at least one virtual channel corresponding to the ensemble, using the acquired program table.