OFDM Signal Frame Header Insertion for Error Correction

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Solution Overview

Problem

Current digital broadcasting technologies, such as DVB-C2, face limitations in data transmission efficiency and error correction capabilities, particularly in handling increased data sizes and channel numbers, which affect the quality of video and audio signals.

Innovation Solution

A method and apparatus for transmitting and receiving broadcasting signals using Orthogonal Frequency Division Multiplexing (OFDM) that selectively inserts headers into data slices, allowing for improved error correction and data transmission efficiency by employing Physical Layer Pipes (PLP) and preamble data, along with advanced interleaving and modulation techniques.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If selective header insertion is implemented in data slices, then error correction capability is improved, but device complexity increases

Engineering Contradiction:
Improveerror correction capabilityVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by selectively inserting headers only in specific data slices rather than uniformly across all slices. The header insertion is controlled by a indication signal that identifies which data slices contain header information, allowing error correction resources to be concentrated where needed while avoiding unnecessary complexity in slices that don't require headers.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent segments the data transmission by dividing it into multiple data slices with different types (first type without header, second type with header). This segmentation allows the system to apply different error correction strategies to different segments based on their specific requirements, improving overall reliability without uniformly increasing complexity across the entire system.

Inventive Principle:
Principle #1Segmentation

2Productivity

If multiple data slice types are used, then data transmission efficiency is improved, but ease of operation deteriorates

Engineering Contradiction:
Improvedata transmission efficiencyVSAvoidease of operation
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by including indication signals in advance within the transmitted data that clearly mark which data slices contain headers. This allows the receiving device to预先 know how to process each data slice without requiring complex real-time analysis, thereby improving ease of operation despite the presence of multiple data slice types.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The indication signal acts as an intermediary that bridges the complexity of multiple data slice types with the simplicity of reception processing. By providing clear markers that indicate header presence or absence, the indication signal enables receiving devices to automatically adapt to different data slice types without requiring complex manual configuration or analysis.

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances data transmission efficiency and error correction capabilities, enabling better reception of high-definition video and audio signals by optimizing signal framing and modulation, thereby improving the robustness of digital broadcasting systems.

Implementation Method 1

modulating the signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method

Methodology Applied
Scientific EffectOrthogonal Frequency Division Multiplexing:

Data Source

PatentUS9882763B2Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal
Publication Date: 2018.01.30 LG ELECTRONICS INC
  • US9882763B2 patent drawing
  • US9882763B2 patent drawing
  • US9882763B2 patent drawing

AI summary

According to one embodiment, a method of transmitting at least one broadcasting signal having PLP (Physical Layer Pipe) data and preamble data includes: encoding the PLP data; encoding the preamble data; mapping the encoded PLP data to PLP data symbols by QAM (Quadrature Amplitude Modulation) modulations; mapping the encoded preamble data to preamble data symbols by QAM modulations; building a signal frame including the PLP data symbols and the preamble data symbols, wherein the preamble data symbols include first signaling information and second signaling information, wherein the first signaling information is for the second signaling information and includes size information of the second signaling information, and wherein the second signaling information is for the PLP data symbols; modulating the signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and transmitting the modulated signal frame.