Uncoded Transport Tunneling for Forward-Compatible Mobile TV Reception
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Solution Overview
Problem
Current ATSC digital TV broadcast systems face challenges in mobile reception, particularly at vehicular speeds, and lack a method to seamlessly integrate extensions into the existing framework for improved mobile reception of digital television signals.
Innovation Solution
The system employs uncoded transport tunneling, where audiovisual information is encoded using a first error correction method, while additional information is left uncoded, allowing for future service versions to be integrated within the existing framework without breaking it, using control information to distinguish between coded and uncoded data, enabling forward compatibility and improved mobile reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction coding is applied to all audiovisual information in ATSC digital TV broadcast, then reliability of signal reception is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments the transport stream into different packet types: coded packets containing error correction coded audiovisual information and uncoded packets containing control information and signaling data. This segmentation allows receivers to process only the necessary portions with full error correction while handling control data with simpler processing, thereby reducing overall device complexity while maintaining reception reliability for critical content.
Solution Approach 2:
The patent applies error correction coding selectively to different portions of the transport stream based on their specific requirements. Audiovisual information packets receive full error correction coding for high reliability, while control information packets use alternative coding schemes or remain uncoded, as they have different reliability requirements. This local differentiation optimizes the balance between reliability and processing complexity for each data type.
2Adaptability or versatility
If the ATSC framework is extended to support mobile reception services, then adaptability is improved, but system complexity and integration difficulty increase
Solution Approach 1:
The patent implements mobile services by nesting them within the existing ATSC transport stream framework. Mobile service data is encapsulated as payload within MPEG-2 transport packets that maintain the standard ATSC structure. This nesting approach allows mobile reception services to be integrated into the existing ATSC broadcast infrastructure without requiring a completely new system architecture, thereby improving adaptability while controlling integration complexity.
Solution Approach 2:
The patent creates a universal transport stream format that can carry both traditional ATSC audiovisual content and extended mobile services simultaneously. The transport stream structure is designed to accommodate multiple service types through standardized packet formats and signaling mechanisms, enabling the system to perform multiple functions (broadcast TV, mobile reception, data services) through a single unified framework, thus improving adaptability without proportionally increasing system complexity.
3Adaptability or versatility
If new service versions are integrated into the existing ATSC framework, then forward compatibility is improved, but system complexity increases
Solution Approach 1:
The patent incorporates preliminary action by including forward compatibility mechanisms in the current system design. Control information packets contain signaling data that预先 defines structures for future service versions and extended capabilities. By embedding these forward-looking elements now, the system can accommodate future service updates without requiring fundamental architectural changes, thereby improving forward compatibility while managing framework complexity through planned obsolescence and incremental evolution.
Data Source
AI summary
Wireless transport of multiple service versions of a transport framework. First and second information may be processed for transmission, respectively, according to first and second service versions of a transport framework. The first and second information may be encoded using a first type of error correction coding; after processing, the processed first information may include error correction coding according to the first type of error correction coding, while the processed second information may remain uncoded according to the first type of error correction coding. Control information may be generated indicating that the second information remains uncoded according to the first type of error correction coding, which may signal to receivers that the second information is processed according to the second service version of the transport framework. Packets including the processed first information, the processed second information, and the control information may be generated and transmitted in a wireless manner.