Free-Viewpoint Video Editing for Autopilot Teaching Playback
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Solution Overview
Problem
Existing technologies do not provide for the generation and distribution of teaching files for autopilot using free viewpoint video data, nor do they allow for the addition of annotations such as text and audio to the video.
Innovation Solution
A video distribution system and method that includes a video distribution device and terminal device, capable of generating and distributing teaching files for autopilot by editing free viewpoint video data, incorporating features like screen teaching data, content teaching data, and annotation teaching data, including text, graphics, and audio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of clients are connected to the content distribution network, then the network can serve more users, but the network bandwidth is consumed excessively leading to degraded service quality
Solution Approach 1:
The patent segments the content distribution network into multiple hierarchical levels: head-end nodes, regional distribution nodes, and local access nodes. Content is distributed through this segmented structure, allowing local caching at multiple levels rather than all content flowing through the core network bandwidth, thus serving more clients efficiently.
Solution Approach 2:
The patent implements pre-positioning of content data at distribution nodes and client devices before actual playback. Content segments are cached in advance at regional and local nodes based on predicted demand patterns, so when clients request content, the data is already available locally rather than being streamed from the head-end, reducing real-time bandwidth consumption.
2Loss of time
If content is pre-positioned at client devices, then playback can start immediately without buffering, but the device memory is consumed
Solution Approach 1:
The patent divides content into multiple small segments rather than caching entire files. Only the necessary number of segments (e.g., 5-10 segments) are pre-positioned at the client device, which is sufficient to enable immediate playback start without requiring large device storage capacity.
Solution Approach 2:
The patent implements partial pre-positioning by caching only a limited portion of content (a few segments) at the client device rather than the entire content file. This partial action is sufficient to eliminate initial buffering delay while avoiding excessive memory consumption.
3Loss of energy
If hierarchical distribution is implemented with multiple nodes, then network bandwidth is optimized, but the device complexity increases
Solution Approach 1:
The patent designs distribution nodes with multi-functional capabilities that can operate at multiple hierarchical levels. A regional distribution node can function as both a content aggregation point from the head-end and a content distribution point to local access nodes, reducing the need for dedicated specialized devices at each level and simplifying overall network complexity.
Solution Approach 2:
The patent combines multiple distribution functions into unified nodes. Regional distribution nodes aggregate content from multiple head-ends and distribute to multiple local nodes, while also providing local caching and content delivery services. This merging of functions reduces the total number of separate devices needed and simplifies network management.
Data Source
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AI summary
[Object] Provided is a technology that generates teaching files for autopilot by editing free viewpoint video data, for example, and distributes the generated teaching files. [Solution] In the video distribution system according to the present invention, the video distribution device 1 includes: a distributor, which distributes the free viewpoint video data; a first acquisition unit, which acquires teaching data from the terminal device 2; and a teaching file generator, which generates a teaching file for automatic playback on the basis of the teaching data. The terminal device 2 includes: a second acquisition unit, which acquires the free viewpoint video data from the video distribution device 1; a video generator, which generates a video on the basis of the free viewpoint video data; a display, which displays the video; and an editing unit, which edits the free viewpoint video data and transmits teaching data.