Viewpoint Navigation for Seamless Video Transitions
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Solution Overview
Problem
Existing multi-view point video presentation systems face challenges in providing smooth transitions between view points with minimal delay and no frame freezing, often addressed only by increasing computing power and throughput.
Innovation Solution
A method and apparatus that allow viewer interaction to seamlessly switch between video sequences associated with different view points by determining a start position within the second video sequence and discontinuing image retrieval from the first sequence at that point, ensuring smooth and quick transitions by using concurrent processing and viewer input analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If viewer interaction is provided to switch between view points, then the viewer experience is improved, but transition smoothness and delay performance deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-synchronizing multiple video sequences from different view points before playback. The synchronization process aligns timestamps and frame rates of all video sequences in advance, so that when a view point switch is triggered by viewer interaction, the transition can occur immediately without computation delay or frame freezing, thus resolving the contradiction between interaction capability and transition speed
2Speed
If computing power and throughput are increased to address transition challenges, then transition smoothness is improved, but system complexity and cost worsen
Solution Approach 1:
The patent uses copying by creating synchronized copies of video sequences from different view points that are pre-aligned in time and space. Instead of computing interpolated views in real-time when a switch is requested, the system maintains multiple pre-synchronized video stream copies that can be switched between instantly. This eliminates the need for high computing power during transitions while maintaining smoothness, thus resolving the contradiction between transition speed and system complexity
3Adaptability or versatility
If multiple video sequences are processed concurrently to enable view switching, then view transition capability is improved, but processing complexity worsens
Solution Approach 1:
The patent applies universality by designing a single source processing mechanism that handles multiple video sequences simultaneously through synchronized playback. The system uses a universal synchronization protocol that works across any number of video sequences from different view points, allowing the same processing framework to manage arbitrary numbers of concurrent video streams without proportionally increasing complexity. This enables view switching capability while keeping processing complexity manageable
Data Source
AI summary
Viewer interaction herein triggers switching from a first view point to a second view point and thereby controls presentation of video sequences. Each video sequence comprises a sequence of images of one and the same subject and is associated with a respective view point. Images are obtained from a first video sequence associated with a first view point and are provided for presentation. Viewer input information is received that indicates a desire to present a second view point. In response, a start position within a second video sequence associated with the second view point is determined, and the obtaining of images from the first video sequence is discontinued as of the determined start position. Images are then obtained from the second video sequence associated with the second view point, starting from the determined start position, and are then provided for presentation.