Broadcast Stream Training Sequence Layout for Mobile Data Reception
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Solution Overview
Problem
The ATSC-MH standard for digital broadcasting is inefficient in transmitting mobile data due to vulnerabilities in region B of the transport stream and limited transmission capacity, as region B lacks known data for error correction, and existing methods do not effectively utilize the allocated resources for mobile data transmission.
Innovation Solution
A digital broadcast transmitter and receiver system that configures a transport stream by placing known data in predetermined locations to generate a long training sequence, improving error correction and transmission efficiency by encoding and interleaving the stream, and utilizing trellis encoding for robust mobile data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mobile data is placed in packets allocated to normal data according to ATSC-MH standard, then transmission capacity for mobile data is increased, but region B becomes vulnerable to errors due to lack of known data for error correction
Solution Approach 1:
The patent applies preliminary action by pre-placing known data (training sequences) in predetermined locations within the transport stream before transmission. This allows the receiver to perform equalization and error correction using these known reference signals, thereby improving reliability in region B while maintaining high transmission capacity for mobile data.
2Reliability
If packets allocated to normal data are used exclusively for normal data, then error correction is reliable, but transmission efficiency for mobile data deteriorates due to unavailable bandwidth
Solution Approach 1:
The patent applies universality by making the packets allocated to normal data serve dual purposes: they can carry normal data when needed, and can be repurposed to carry mobile data with embedded known training sequences. This multi-functional approach allows the same bandwidth to be efficiently utilized for mobile data transmission while maintaining error correction capabilities through the incorporated known data.
3Productivity
If region B is configured without known data to maximize mobile data transmission, then transmission capacity is optimized, but reception performance deteriorates due to vulnerability to errors
Solution Approach 1:
The patent applies local quality by strategically placing known training sequences at specific predetermined locations within region B rather than uniformly throughout. This localized placement of reference signals provides sufficient error correction capability at critical points while maximizing the remaining bandwidth for mobile data transmission, thus balancing reception performance with transmission capacity.
Data Source
AI summary
Provided are a digital broadcast transmitter, a digital broadcast receiver, a stream-processing method for the digital broadcasting transmitter, and a stream-processing method for the digital broadcast receiver. The stream-processing method for the digital broadcasting transmitter includes: configuring a stream in which slots including a plurality of blocks are continuously disposed; and encoding and interleaving the stream to be output as a transport stream, wherein the configuring the stream includes, if slots of a block extension mode 00 are continuously placed, connecting known data placed in predetermined locations of adjacent slots to each other in order to generate a long training sequence.