IP Packet Delivery Format with PCR Indicator for Multimedia
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current digital broadcast methods using MPEG-2 Transport Stream are inefficient for transmitting high-resolution multimedia content over IP networks, such as stereo 3D video, Ultra High Definition, and hologram broadcasts, due to fixed packet lengths and increased data requirements.
Innovation Solution
A method and device for converting content between file formats and delivery formats, including indicator information for Program Clock Reference (PCR) transmission, allowing for efficient transmission and synchronization over IP networks, with the delivery format being adaptable for variable packet lengths and including clock reference values for synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MPEG-2 Transport Stream with fixed 188 byte packets is used for transmission, then transmission compatibility is maintained, but transmission efficiency for high-resolution content over IP networks deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed-length MPEG-2 TS packets to variable-length delivery format packets adapted for IP networks. The delivery format allows flexible packet sizing and structure that dynamically adjusts to content requirements, improving transmission efficiency for high-resolution multimedia while maintaining compatibility through standardized protocols.
Solution Approach 2:
The patent changes key transmission parameters by introducing a new delivery format with different packet structures, length specifications, and organization compared to MPEG-2 TS. This parameter transformation enables optimized IP network transmission while preserving essential broadcast functionality through format conversion mechanisms.
2Measurement precision
If clock reference information is always transmitted, then synchronization accuracy is improved, but data overhead increases
Solution Approach 1:
The patent applies partial action by selectively including clock reference information only when necessary for synchronization. The system transmits PCR (Program Clock Reference) data only in packets where it is needed to maintain timing accuracy, rather than including it in every packet, thus reducing overall data overhead while maintaining synchronization precision where required.
Solution Approach 2:
The patent extracts clock reference information from every packet and includes it only in specific packets where synchronization is needed. This selective extraction reduces redundant data transmission while ensuring that critical synchronization points receive the necessary timing information for accurate clock synchronization between transmitter and receiver.
Data Source
AI summary
The present invention relates to a method for transmitting/receiving contents through a network such as the Internet, and to a transmitter/receiver using same, the transmission method comprising: converting content stored in a file format into a delivery format; and transmitting the content converted into the delivery format using an IP packet, wherein the delivery format includes indicator information for expressing whether a program clock reference (PCR) has been transmitted to the IP packet.