Broadcast Signal Transmission via Link Layer Packet Segmentation
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in mobile and indoor environments, due to the large amounts of video/audio data and additional services they need to handle.
Innovation Solution
A method and apparatus for transmitting broadcast signals that involves compressing IP packet headers, generating link layer packets with signaling information, and forming broadcast frames, allowing for dedicated information channels and flexible channel configuration, enabling efficient transmission and reception of digital broadcast signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals include large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The broadcast signal is segmented into multiple logical channels (transport channels) that can be independently configured and transmitted. Each channel carries specific types of data (video, audio, services), allowing efficient resource allocation and transmission optimization for each segment while maintaining overall service functionality.
Solution Approach 2:
The system dynamically adjusts transmission parameters including modulation schemes, coding rates, and channel allocation based on service requirements and channel conditions. This allows optimization of data transmission efficiency while maintaining the ability to deliver diverse services with different quality requirements.
2Adaptability or versatility
If digital broadcast systems handle large amounts of data, then service capability is improved, but transmission robustness deteriorates
Solution Approach 1:
Data is divided into transport packets that are further segmented and distributed across multiple physical channels. This segmentation provides redundancy and error protection, as damage to one channel does not compromise the entire transmission, thereby maintaining robustness while supporting large data volumes.
Solution Approach 2:
The system implements forward error correction and redundancy mechanisms in advance of potential transmission errors. Error correction codes and redundant data paths are prepared beforehand to cushion against channel impairments, ensuring robust reception even when handling large amounts of data.
3Adaptability or versatility
If broadcast systems support mobile reception equipment, then network flexibility is improved, but reception reliability deteriorates
Solution Approach 1:
The broadcast system dynamically adapts transmission parameters including channel allocation, modulation depth, and data rate based on detected mobile receiver conditions. This dynamic adjustment maintains reception reliability by reducing complexity and increasing redundancy when mobile devices experience challenging reception environments.
Solution Approach 2:
The system designs transport channels with universal characteristics that work effectively for both fixed and mobile reception scenarios. Multiple service types and data formats are accommodated within the same channel structure, providing flexibility for mobile devices while maintaining reliable transmission through standardized robust protocols.
Data Source
AI summary
A method of transmitting a broadcast signal, includes generating at least one first link layer packet including data packets that include broadcast data in a link layer that is a layer between a physical layer and a network layer, generating at least one second link layer packet including link layer signaling information in the link layer and transmitting the broadcast signal including the at least one first link layer packet and the at least one second link layer packet in the physical layer, wherein a header of the at least one first link layer packet includes packet type information for indicating a packet type of the data packets before being included in the at least first link layer packet, wherein the data packets are Transport Stream (TS) packets or Internet Protocol (IP) packets, and wherein the TS packets are header compressed TS packets or header uncompressed TS packets.