Link Layer Packet Header for Hybrid Broadcast Signal Transmission
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Solution Overview
Problem
The transition from conventional MPEG-2 TS to IP-based broadcast systems is slow, necessitating a hybrid system that supports both technologies to facilitate the development of next-generation broadcast services.
Innovation Solution
A method for transmitting broadcast signals involves generating signaling information, creating link layer packets with specific headers and payloads, and concatenating or segmenting data to efficiently transmit and receive signals, ensuring compatibility with both MPEG-2 TS and IP protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hybrid broadcast system supports both MPEG-2 TS and IP protocols, then compatibility with legacy and next-generation systems is improved, but device complexity increases
Solution Approach 1:
The patent introduces a link layer as an intermediary between the physical layer and upper layers (MPEG-2 TS or IP). This link layer uses standardized packet structures with type fields to differentiate between protocol types, allowing the system to handle both MPEG-2 TS and IP protocols through a unified interface without requiring complex protocol-specific processing in lower layers.
Solution Approach 2:
The patent segments broadcast data into standardized link layer packets with fixed header structures. Each packet contains a type field that identifies whether the payload is MPEG-2 TS or IP data. This segmentation allows the system to process different protocol types through the same infrastructure, reducing overall system complexity while maintaining dual protocol support.
2Productivity
If signaling information is efficiently transmitted in hybrid broadcast systems, then data transfer efficiency is improved, but packet structure complexity increases
Solution Approach 1:
The patent merges signaling information transmission into the existing link layer packet structure. Instead of creating separate signaling protocols, the system uses the same packet framework with type fields to indicate signaling data. This consolidation improves data transfer efficiency by utilizing the same transmission infrastructure while managing complexity through standardized field definitions.
Solution Approach 2:
The link layer packet structure is designed to be universal, handling both data transmission and signaling functions through the same mechanism. The type field in the packet header determines whether the payload contains user data or signaling information, allowing a single packet structure to serve multiple purposes without requiring separate specialized structures.
Data Source
AI summary
A method for transmitting a broadcast signal in a digital transmitter includes generating a link layer packet; generating the broadcast signal based on the link layer packet; and transmitting the broadcast signal. Further, the link layer packet includes at least one header and a payload, in which the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet. In addition, in response to the packet type field represents that the input data relates to a Movie Picture Experts Group-2 (MPEG-2) Transport Stream (TS) packet, a first header included in the link layer packet includes a deleted null packet indicator for representing the number of deleted null TS packets prior to the link layer packet.