Transport Stream Time Information Insertion for Broadcasting
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Solution Overview
Problem
Current transport structures for next-generation broadcasting, such as MPEG Media Transport (MMT), lack reliable mechanisms for delivering time information necessary for decoding and presentation timing to receivers, which can lead to inefficiencies and increased processing loads.
Innovation Solution
A transmission apparatus that generates and transmits a transport stream with time-division multiplexed transport packets containing media and metadata, inserting decoding time and presentation time information into these packets to enable efficient delivery and processing at the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time information is not inserted into transport packets, then the transport structure remains simple and compatible with IP networks, but the receiver cannot obtain reliable decoding time and presentation time information
Solution Approach 1:
The patent segments time information into two distinct types: decoding time information and presentation time information. These are inserted into different transport packets or different fields within packets, allowing the receiver to process them separately. This segmentation enables reliable delivery of both time information types without overwhelming the packet structure with undifferentiated data.
Solution Approach 2:
The transmission apparatus performs preliminary insertion of time information into transport packets before transmission. By pre-inserting decoding time and presentation time information in standardized formats, the receiver receives ready-to-use timing data without needing to perform complex calculations or extractions, thereby improving reliability while maintaining structural simplicity.
2Measurement precision
If complete time information is delivered to the receiver, then decoding and presentation timing can be accurately obtained, but the processing load on the receiver increases
Solution Approach 1:
The patent extracts only the essential time information elements needed for accurate timing - specifically decoding time and presentation time - and inserts them directly into transport packets. By taking out and delivering only these critical timing parameters in standardized formats, the receiver can obtain accurate timing information without processing unnecessary or redundant data, thus reducing processing load while maintaining precision.
3Reliability
If time information is inserted into every transport packet, then the receiver can obtain timing data for all media units, but the transmission bandwidth is consumed and efficiency is reduced
Solution Approach 1:
The patent merges multiple time information elements into consolidated transport packets or uses efficient encoding schemes that combine decoding time and presentation time data. By merging redundant or related time information into single structured packets rather than inserting separate time data into every media packet, the system maintains complete timing information availability while significantly improving transmission efficiency and reducing bandwidth consumption.
Data Source
AI summary
A transmission apparatus including: a transport stream generation unit configured to generate a transport stream in which a first transport packet containing transport media in a payload and a second transport packet containing information about the transport media in a payload, are time-division multiplexed; a transport stream transmission unit configured to transmit the transport stream to a receiver through a predetermined transmission channel; and a time information insertion unit configured to insert time information for allowing the receiver to obtain decoding time and/or presentation time into the first transport packet or the second transport packet.