Satellite Signal Transmission System for UHDTV Capacity
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Solution Overview
Problem
Current DVB-S2 satellite transmission systems are inefficient in utilizing transmission/reception capacity, particularly with the introduction of Ultra High Definition Television (UHDTV) services, as they cannot effectively split and reconstruct MPEG-TS streams across multiple satellite channels, leading to unused capacity and limitations in the number of programs that can be transmitted.
Innovation Solution
A method and system that split an MPEG-TS stream into multiple streams for transmission on distinct satellite channels, using rate adapters and modulators with synchronized counters to ensure constant bit rate and delay, allowing for the reconstruction of the original stream on the receiver side, thereby minimizing unused capacity and enabling the transmission of more UHDTV programs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If statistical multiplexing is used to transmit multiple UHDTV programs on a single satellite channel, then the number of programs that can be transmitted increases, but the transmission capacity utilization remains insufficient due to unused capacity
Solution Approach 1:
The invention segments the MPEG-TS stream into multiple sub-streams, each transmitted on a separate satellite transmission channel. This segmentation allows the transmission system to utilize multiple channels efficiently, reducing unused capacity while maintaining the ability to transmit multiple UHDTV programs. The receiver reassembles these sub-streams to reconstruct the original stream.
2Productivity
If the transmission bit rate is increased to transmit more UHDTV programs, then the number of programs increases, but the synchronization of MPEG-TS streams becomes more difficult to maintain
Solution Approach 1:
The invention applies preliminary action by adding an Input Stream Synchronizer (ISSY) to each packet in the MPEG-TS stream before transmission. This ISSY contains timing information that allows the receiver to synchronize the reassembled stream accurately. By preparing the synchronization data in advance during the segmentation process, the system maintains reliable synchronization even when transmitting multiple UHDTV programs at high bit rates.
Data Source
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AI summary
The invention relates to a system, a receiver and a method for satellite signal transmission, wherein said method comprises the steps of grouping said signals into a data stream, splitting the data stream into at least a first and one or more second packets, transmitting the first packet via a first transmission channel (Ch#1), transmitting said one or more second packets via one or more second transmission channels (Ch#2), wherein said one or more second transmission channels (Ch#2) are distinct from the first transmission channel (Ch#1) and from one another.