Digital Broadcast Stream Layout for Mobile Data Error Correction
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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 susceptibility to errors, especially in areas not allocated known data for error correction.
Innovation Solution
A method is introduced to configure digital broadcast streams by placing mobile data in part of the packets allocated to normal data, allowing for diverse transmission efficiency and improved reception performance by incorporating encoding, interleaving, trellis encoding, and multiplexing with a sync signal, and including known data for error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile data is placed only in packets allocated to mobile data according to ATSC-MH standard, then error correction is improved in mobile data area, but transmission efficiency deteriorates due to inability to utilize normal data area
Solution Approach 1:
The patent applies universality by enabling the normal data packet area to serve dual purposes: transmitting both normal data and mobile data. The transport stream packets are configured to accommodate mobile data in both the mobile data area and the normal data area, allowing the normal data area to function universally for both data types simultaneously, thereby improving transmission efficiency without compromising error correction capabilities.
2Device complexity
If known data is not placed in area B of mobile data, then mobile data transmission is simplified, but error susceptibility increases in area B
Solution Approach 1:
The patent applies local quality by selectively placing known data in specific sub-areas within the mobile data packets. Rather than uniformly distributing known data throughout all mobile data areas, the invention strategically positions known data in area B where it is most needed for error correction, while maintaining simplified configuration in other areas. This localized approach to known data placement optimizes error susceptibility reduction without unnecessarily complicating the overall stream configuration.
3Quantity of substance
If packets allocated to normal data are not used for mobile data, then normal data transmission is ensured, but mobile data transmission capacity is limited
Solution Approach 1:
The patent applies dynamics by implementing flexible and adaptable stream configuration that can dynamically allocate packet resources. The system enables mobile data to be placed in normal data packets based on varying transmission requirements, allowing the stream configuration to adapt to different mobile data capacity needs while maintaining operational simplicity through standardized packet structures and systematic allocation methods.
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.