Digital Broadcast Stream Layout for Mobile Data Error Resilience
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Solution Overview
Problem
The existing digital broadcast standards, such as the ATSC-MH standard, face limitations in transmitting mobile data due to inefficient stream configuration, which results in reduced transmission efficiency and poor error resistance in certain areas of the transport stream, particularly area 'B', where known data for error correction is not placed, leading to susceptibility to errors and limited use of allocated resources.
Innovation Solution
A method is introduced to configure a transport stream by placing mobile data in part of the packets allocated to normal data, allowing for diverse transmission efficiency and improved reception performance, involving a digital broadcast transmitter with a data pre-processor to place mobile data in packets allocated to normal data, and a multiplexer to configure the transport stream with mobile data, along with encoding, interleaving, and trellis encoding, while a digital broadcast receiver demodulates and decodes the stream to extract mobile data from these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mobile data is placed only in packets allocated to mobile data according to ATSC-MH standard, then normal data transmission is maintained, but transmission efficiency of mobile data is limited and area B is susceptible to errors
Solution Approach 1:
The patent merges mobile data and normal data into the same packet structure, allowing mobile data to be transmitted in both packets originally allocated to mobile data and packets allocated to normal data. This combining approach increases the transmission capacity for mobile data while maintaining proper error correction through interleaving.
Solution Approach 2:
The patent segments mobile data into multiple portions that are distributed across different packets - some packets contain only mobile data while others contain both mobile data and normal data. This segmentation allows flexible utilization of packet resources and improves overall transmission efficiency.
2Productivity
If packets allocated to normal data are used exclusively for normal data, then normal data transmission is ensured, but transmission efficiency of mobile data deteriorates
Solution Approach 1:
The patent makes packets universally applicable to both mobile data and normal data transmission. Packets originally designated for normal data can now also carry mobile data, creating a multi-functional packet structure that adapts to different transmission needs and improves overall system versatility.
Solution Approach 2:
The patent introduces dynamic packet allocation where the content of packets can vary - some packets are dedicated to mobile data, others to normal data, and some contain a mixture of both. This dynamic configuration allows the system to adapt to varying data transmission requirements and optimize efficiency.
3Productivity
If area B does not include known data for error correction, then more space is available for data transmission, but area B becomes susceptible to errors
Solution Approach 1:
The patent applies preliminary error correction measures by implementing interleaving that spans across area A and area B. Known data and error correction mechanisms are prepared in advance and distributed throughout the packet structure, including in area B, so that error correction capability is established before transmission errors can occur.
Data Source
AI summary
A method for processing a stream of a digital broadcast receiver is provided. The method which processes a stream that is divided into a first area allocated to first mobile data and a second area allocated to normal data, includes: receiving a transport stream including new mobile data in at least a part of the second area separately from the first mobile data, demodulating the transport stream, equalizing the demodulated transport stream, and decoding at least one of the first mobile data and the new mobile data from the equalized transport stream. Accordingly, mobile data services may be provided in various ways.