DVR Closed Captioning During Trick Play
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Solution Overview
Problem
Current digital video recorders (DVRs) do not display closed captioning data during trick play mode, making it difficult for viewers to locate relevant parts of recorded video streams efficiently.
Innovation Solution
The system generates an analyzed file of text data, such as closed captioning, optimized for non-real time presentation rates, allowing it to be displayed alongside video content during fast forwarding or other trick play modes, even if the original captioning data was not presented in the correct order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If closed captioning data is processed and presented in real time during video stream presentation, then the captioning data can be displayed on screen during normal playback, but the captioning data cannot be displayed during trick play mode viewing
Solution Approach 1:
The system performs preliminary processing of closed captioning data during recording, organizing and storing the data in a structured format that enables efficient retrieval and display during trick play mode. This preliminary action allows the captioning data to be presented alongside fast-forwarded video content without requiring real-time processing during playback.
2Loss of information
If closed captioning data is displayed on screen during trick play mode viewing, then viewers can locate relevant parts of recorded video stream more easily, but present DVRs are inadequate for providing this functionality
Solution Approach 1:
The system segments the video stream processing and captioning data handling into separate functional components. The video data and captioning data are processed independently but synchronized through timestamp correlation, allowing the DVR to display captioning information during trick play mode without requiring complete rearchitecture of the system.
Solution Approach 2:
The system introduces an intermediary processing layer that receives both video stream data and closed captioning data, correlates them using timestamps, and outputs synchronized information for display. This intermediary component enables trick play mode captioning without directly modifying the core video processing architecture.
3Productivity
If video stream is presented at non-real time presentation rates during trick play mode, then viewers can skip portions of recording efficiently, but closed captioning data cannot be synchronized with the accelerated video playback
Solution Approach 1:
The system changes the parameter of captioning data presentation by storing and retrieving captioning information based on timestamp parameters rather than real-time playback parameters. During trick play mode, the system retrieves captioning data corresponding to the current playback timestamp, maintaining synchronization between accelerated video playback and captioning display through parameter-based correlation.
Data Source
AI summary
Various embodiments of apparatus and/or methods are described for presenting text data (e.g., closed captioning data) during trick play mode presentation of a video stream. An analyzed file of the text data is provided on a digital video recorder (DVR), and during trick play mode, text data corresponding to video frames of a video stream is retrieved from the analyzed file and outputted for presentation by the presentation device.