Non-closed Caption Data Transport for iTV Triggers
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Solution Overview
Problem
Current methods face challenges in reliably transporting interactive television (iTV) triggers and adjunct data from content creators through the distribution chain to iTV receivers, particularly due to issues with the HDMI interface between set-top boxes and iTV receivers.
Innovation Solution
The proposed solution involves using a non-closed caption data transport method that utilizes Standard Service Number 6 for carrying non-closed caption data, such as iTV triggers, within the existing closed caption service, employing CEA-708 compliant variable-length commands to ensure compatibility with legacy decoders and minimize disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HDMI interface is used to transport iTV triggers from set-top box to iTV receiver, then data transport capability is improved, but compatibility with legacy receivers deteriorates and interface complexity increases
Solution Approach 1:
The patent applies universality by enabling the closed caption service (specifically Service Number 6) to perform multiple functions: transporting both traditional closed caption data and iTV trigger data through the same interface. This allows legacy receivers to continue receiving caption data while newer receivers can extract and process iTV triggers from the same data stream, eliminating the need for separate transport interfaces.
Solution Approach 2:
The patent uses the closed caption data stream as an intermediary medium to transport iTV triggers. Instead of requiring a dedicated interface for trigger transport, the system embeds trigger data within the existing closed caption service infrastructure, allowing data to be conveyed through an established channel that both legacy and modern receivers can handle.
2Adaptability or versatility
If new data transport method is implemented for iTV triggers, then functionality is improved, but device complexity increases
Solution Approach 1:
The patent merges the transport of iTV triggers with the existing closed caption service infrastructure. By combining trigger data transport with the established Service Number 6 caption channel, the system avoids creating separate dedicated hardware or interfaces for trigger transport, thereby adding functionality without proportionally increasing device complexity.
Solution Approach 2:
The system leverages the existing closed caption service infrastructure to serve the additional function of transporting iTV triggers. The existing caption processing equipment and data paths are utilized to also handle trigger data, eliminating the need for separate dedicated equipment and reducing overall system complexity.
Data Source
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AI summary
Methods, apparatuses, and non-transitory computer-readable storage mediums for providing and/or processing non-closed caption data. The reception apparatus includes a receiver, a parser, and a processor. The receiver receives closed caption service data. The closed caption service data includes closed caption data within a first service block having a service number in the range of 1-6, and non-closed caption data within a second service block having a different service number in the range of 1 -6. The closed caption data includes closed caption text. The parser parses the non-closed caption data within the second service block having the different service number in the range of 1-6. The processor performs a function based on the parsed non-closed caption data.