Mobile Broadcast Burst Reception With Known Data Insertion

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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 in portable and mobile receiving systems, due to inadequate resistance to channel changes and noise.

Innovation Solution

A digital broadcasting system that performs additional encoding on mobile service data, inserts known data, and uses a burst structure with a burst-on and burst-off section to enhance receiving performance, while also reducing power consumption by controlling the broadcast receiving system's power supply based on data reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If VSB transmission mode is used for digital broadcasting, then the system is simple to implement, but the receiving performance deteriorates in poor channel environments

Engineering Contradiction:

Improveimplementation simplicityVSAvoidreceiving performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The transmission system segments data into different types (mobile service data and main service data) and applies different processing methods to each. Mobile service data undergoes additional encoding and is transmitted in burst mode with known data insertion, while main service data uses conventional transmission, thus resolving the contradiction by creating specialized transmission paths for different data requirements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts transmission parameters including inserting known data at predetermined positions, varying burst structures with burst-on and burst-off sections, and adapting encoding schemes based on channel conditions. This dynamic adaptation allows the system to maintain implementation simplicity while improving receiving performance in varying channel environments

Inventive Principle:

Principle #15Dynamics

2Reliability

If additional encoding is performed on mobile service data, then resistance to channel changes and noise improves, but system complexity increases

Engineering Contradiction:

Improveresistance to channel changes and noiseVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Additional encoding and known data insertion are applied locally only to mobile service data packets, not to all transmitted data. The system identifies mobile service data packets and applies enhanced processing only to them, while main service data uses standard processing, thus improving noise resistance for mobile data without unnecessarily increasing overall system complexity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Known data is inserted in advance at predetermined positions within mobile service data packets before transmission. This preliminary action provides reference signals that enable the receiver to better track and decode mobile service data in noisy environments, improving reliability without requiring complex real-time processing

Inventive Principle:

Principle #10Preliminary action

3Reliability

If known data is inserted in predetermined areas within data area, then receiving performance is enhanced, but data transmission efficiency decreases

Engineering Contradiction:

Improvereceiving performanceVSAvoiddata transmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Known data is inserted only in predetermined areas within mobile service data packets, not throughout the entire data stream. This partial insertion provides sufficient reference points for reliable reception of mobile service data while minimizing the overhead and maintaining acceptable transmission efficiency for the overall system

Inventive Principle:

Principle #16Partial or excessive action

4Reliability

If continuous power supply is maintained for data reception, then receiving performance is ensured, but power consumption increases

Engineering Contradiction:

Improvereceiving performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The receiving system uses periodic burst structures with burst-on sections (where mobile service data is transmitted) and burst-off sections (where no mobile service data is transmitted). The receiver activates during burst-on sections and enters low-power mode during burst-off sections, ensuring receiving performance during data transmission while significantly reducing overall power consumption through this periodic on-off operation

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUSRE47792E1Digital broadcasting system and method of processing data

Publication Date: 2019.12.31 LG ELECTRONICS INC

AI summary

A digital broadcast system including a broadcast receiving system and data processing method are disclosed. In the broadcast receiving system receiving broadcast signals, the broadcast receiving system includes a transmission parameter decoding unit, a known sequence detector, and a burst controller. The transmission parameter decoding unit detects information on a burst of a received signal from broadcast data having main service data and mobile service data multiplexed therein within a field of the received signal and outputs the detected information on the burst. The known sequence detector receives burst information from the transmission parameter decoding unit and uses the received burst information and known data position information included in the received data, so as to output burst control information. The burst controller uses the burst control information to control power supply of the broadcast receiving system.