Multi-Stream Composite Video Generation via Mobile Device Synchronization
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Solution Overview
Problem
Existing methods for capturing video of a presenter and their slides are sub-optimal, as they often result in poor visibility of slides and are costly due to the use of dedicated equipment.
Innovation Solution
A system and method for generating a multi-stream composite video by synchronizing two mobile devices, one capturing a video stream and the other capturing interactions with the presenter's slides, allowing for simultaneous display and recording of both without the need for dedicated equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dedicated videotaping equipment is used to capture presenter and slides, then video quality is improved, but cost increases
Solution Approach 1:
The patent applies universality by enabling mobile devices to perform multiple functions - capturing both video streams and interaction data using standard mobile device cameras and processors, eliminating the need for dedicated expensive videotaping equipment while maintaining video quality through software-based composite generation
Solution Approach 2:
The patent creates a virtual copy of the presentation context by capturing video streams from multiple angles and interactions separately, then synthesizing a composite video representation that replicates the full presentation experience without requiring physical duplication of equipment
2Device complexity
If presenter and slides are captured in the same frame, then single-stream video is simplified, but slide visibility deteriorates
Solution Approach 1:
The patent segments the video capture into multiple independent streams - one for the presenter and another for the slides - allowing each to be optimized for its specific content requirements while maintaining separate quality standards, thereby improving slide visibility without oversimplifying the overall system
Solution Approach 2:
The patent transitions from a single two-dimensional frame to a multi-dimensional composite structure by capturing video from different angles and layers (presenter view, slide view, interaction data) and synthesizing them into a rich multi-stream composite that preserves detail in both presenter and slides
3Manufacturing precision
If multiple mobile devices are synchronized to capture composite video, then capture quality is improved, but time synchronization complexity increases
Solution Approach 1:
The patent introduces a server as an intermediary that receives timing information from multiple mobile devices and coordinates the synchronization process, allowing each device to function independently while maintaining precise temporal alignment through server-mediated coordination rather than complex peer-to-peer synchronization
Data Source
AI summary
Systems and methods are provided for generating a multi-stream composite video. A first mobile device is linked with a second mobile device so that the first mobile device and the second mobile device are time synchronized. A video stream is captured using the first mobile device. Interactions with a user interface are captured using the second mobile device. A composite video is generated based on the captured video stream and the captured interactions based on the time synchronization of the first mobile device and the second mobile device.