Broadcast Signal Transmission Header Compression
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Solution Overview
Problem
Digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in mobile reception and indoor environments, due to the large amount of data and varying service requirements.
Innovation Solution
A method and apparatus for transmitting broadcast signals that involve encoding data based on a delivery protocol, line-layer processing, and physical-layer processing, including robust header compression (RoHC) to reduce packet size and extract context information, which is then transmitted as link layer signaling, allowing for flexible service delivery and error-free reception even in mobile or indoor conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals transmit large amounts of video/audio data and additional data, then service quality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent extracts and removes redundant header information from IP packets through RoHC (Robust Header Compression). By identifying and eliminating duplicate or predictable header fields, the system reduces overall packet size while preserving essential data transmission capabilities, thereby improving transmission efficiency without losing service quality.
Solution Approach 2:
The patent changes the parameter of packet header size by applying compression algorithms. The header compression transforms full-sized IP headers into condensed representations, dynamically adjusting header parameters based on packet type and context information, thus reducing the quantity of transmitted data while maintaining transmission integrity.
2Productivity
If robust header compression is applied to reduce packet size, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-establishing context information and static chains before actual data transmission. The receiver is pre-configured with context data that enables it to reconstruct compressed headers without requiring complex real-time processing, thus simplifying the overall system complexity while maintaining compression efficiency.
3Reliability
If context information is extracted and transmitted as link layer signaling, then reception reliability is improved, but loss of information increases
Solution Approach 1:
The patent uses link layer signaling as an intermediary mechanism to transmit context information separately from the main data payload. This intermediary channel ensures that critical context data is delivered reliably to the receiver, enabling accurate header reconstruction without losing essential information, thus maintaining both reliability and information integrity.
Data Source
AI summary
Disclosed is a method of transmitting a broadcast signal. The method includes encoding broadcast data based on a delivery protocol, line-layer processing the broadcast data, and physical-layer processing the broadcast data. Line-layer processing the broadcast data may include compressing the header of at least one IP packet when the broadcast data comprises the IP packet and encapsulating the IP packet into link layer packets.