Broadcast Signal Reception Device Container Encapsulation
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Solution Overview
Problem
Digital broadcast systems face challenges in enhancing network flexibility, data transmission efficiency, and robustness, especially for mobile reception devices, and in delivering time information effectively from the physical layer to higher layers.
Innovation Solution
A broadcast signal reception method and device that demodulate signals using OFDM, parse signal frames to extract L1 signaling data and PLP data, and encapsulate time information and data packets into containers with specific headers for efficient delivery, ensuring error indication and container identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signal transmission is implemented to provide HD image and multi channel audio, then data transmission capacity is improved, but network flexibility and robustness deteriorate
Solution Approach 1:
The broadcast signal is segmented into multiple PLPs (Physical Layer Pipes) with different QoS characteristics, allowing independent optimization of each segment for different service requirements while maintaining overall system flexibility and robustness
Solution Approach 2:
The system dynamically adapts to mobile reception conditions by adjusting transmission parameters and error correction strategies based on channel quality, maintaining network flexibility despite increased data capacity requirements
2Measurement precision
If time information is transmitted from physical layer to higher layers, then synchronization capability is improved, but delivery efficiency deteriorates
Solution Approach 1:
Time information is merged with data packets into a unified container structure, allowing simultaneous transmission of both time synchronization data and content data through the same channel, improving delivery efficiency while maintaining synchronization capability
Solution Approach 2:
A container structure acts as an intermediary that encapsulates time information along with data packets, facilitating efficient transport of time information from physical layer to higher layers without separate transmission overhead
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
This approach enhances data transmission efficiency, improves network robustness, and enables reliable mobile reception by processing data according to service properties and controlling Quality of Service (QoS), while ensuring accurate delivery of time information to higher layers.
Implementation Method 1
demodulating the received broadcast signal in accordance with an Orthogonal Frequency Division Multiplexing (OFDM) scheme
Data Source
AI summary
The present disclosure comprises: a demodulation unit for receiving a broadcast signal including a signal frame divided into a bootstrap area, a preamble area, and a data area, and demodulating the received broadcast signal according to an OFDM scheme; a frame parsing unit for parsing the signal frame from the demodulated broadcast signal; an L1 signaling processing unit for processing preamble data received in the preamble area of the parsed signal frame, and extracting L1 signaling data including time information; a physical layer pipe (PLP) data processing unit for processing PLP data of at least one PLP received in the data area of the parsed signal frame, and extracting at least one data packet; and a container encapsulation unit for generating a first container including the extracted time information, and generating a second container including the at least one extracted data packet, wherein each of the first container and the second container includes a first header, a second header, and a payload, the first header includes start position information indicating a start position of a corresponding container, start position information of the first container and start position information of the second container have the same value, and the second header includes container identification information for distinguishing the first container and the second container.