Closed Caption Placement With Dual Decoding for Synchronized Viewing
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Solution Overview
Problem
Closed captioning overlaid on video can obscure important visual content and lag behind speech, causing disorientation for hearing-impaired viewers, especially in live events.
Innovation Solution
A dual-decoding system where audio is processed by a first decoder for immediate speech-to-text conversion and a second decoder for synchronized playback, allowing closed captioning to be presented in a designated region of the display without obstructing video and in sync with audio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed captioning is overlaid on video to provide accessibility, then hearing-impaired viewers can read speech, but the captioning obscures faces, gestures, and action in the video
Solution Approach 1:
The display area is segmented into multiple regions: a first region for video content and a second region for closed captioning. This spatial segmentation allows both video and captioning to coexist without overlapping, eliminating the obstruction problem while maintaining accessibility.
Solution Approach 2:
The captioning is moved from the traditional overlay position (same plane as video) to a separate spatial region (different plane/area), effectively using spatial dimensionality to resolve the conflict between visibility and readability.
2Loss of information
If closed captioning is typed by stenographer in real-time, then speech can be transcribed, but the captioning lags behind speech causing disorientation
Solution Approach 1:
The system performs preliminary decoding of audio to generate speech text in advance, before the actual playback. This preliminary processing allows the captioning to be prepared and displayed in synchronization with the audio playback, eliminating the lag caused by real-time stenography.
Solution Approach 2:
The manual stenography process is replaced with automated audio decoding and speech-to-text conversion. This substitution of mechanical/manual process with automated electronic processing eliminates the time delay inherent in human typing while maintaining transcription accuracy.
3Ease of operation
If closed captioning is displayed in a larger font for readability, then hearing-impaired viewers can read more easily, but the captioning occupies more screen space and obscures more video
Solution Approach 1:
The display area is divided into distinct regions, allowing the captioning region to use maximum available space for large, readable text without encroaching on the video display area. This segmentation enables large font sizes while preserving video visibility.
Solution Approach 2:
By moving captioning to a separate spatial region rather than overlaying it on video, the system creates additional display space that can accommodate larger text without reducing video quality or visibility.
Data Source
AI summary
Placement of Closed Captioning (CC) in content by a content provider is overridden by means of a user interface (UI) that allows the user to place CC on screen on top of the video. The CC may be derived directly from the audio and synchronized with play of the audio and video.