Closed Caption Display Timing Control via Mode Selection
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Solution Overview
Problem
Technologies for displaying closed captions using Timed Text Markup Language (TTML) have not established methods for displaying closed captions at desired times, leading to a demand for such functionality.
Innovation Solution
A reception apparatus and data processing method that acquire closed caption information and control information, including selection modes for specifying when closed captions are displayed, allowing the closed captions to be output at desired times based on the selected modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TTML is used to display closed captions, then closed caption display functionality is provided, but there is no established method to display closed captions at desired times
Solution Approach 1:
The patent implements multiple display modes (first mode for real-time display, second mode for delayed display, third mode for immediate display) that allow the closed caption system to dynamically adapt its timing behavior based on control information. This enables the system to flexibly control when closed captions are displayed without requiring a completely new complex mechanism, as the existing TTML framework is extended with mode selection capability.
2Adaptability or versatility
If multiple display modes are implemented for closed captions, then desired display timing is achieved, but control information processing complexity increases
Solution Approach 1:
The patent segments the control information into distinct components including mode identification information and display timing information. The reception apparatus processes these segmented control information elements separately, first identifying the selected mode and then applying the corresponding timing rules. This segmentation reduces processing complexity compared to handling all control parameters in a monolithic structure.
Solution Approach 2:
The patent changes the parameter of display timing based on the selected mode. The reception apparatus adjusts the display timing parameter dynamically: in the first mode it uses real-time timing, in the second mode it applies delayed timing, and in the third mode it uses immediate timing. This parameter-based control allows mode selection without requiring complex structural changes to the control information processing architecture.
Data Source
AI summary
A reception apparatus is provided that includes circuitry configured to receive a digital data stream. The circuitry is configured to acquire closed caption information included in the digital data stream. The circuitry is configured to acquire control information including selection information indicating a selection of a specific mode from a plurality of modes for specifying when closed caption text is to be displayed. The circuitry is further configured to output the closed caption text included in the closed caption information for display to a user, at a display time according to the specific mode, based on the selection information included in the control information.