MPEG-DASH Video Area Information for Stable All-Sky View
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Solution Overview
Problem
Existing video distribution systems that use all-sky image capturing devices face issues where changes in camera orientation or zoom ratios lead to unintended video displays, making it inconvenient for users to maintain or change the video view as intended.
Innovation Solution
A sending device that segments all-sky video data and sends video area information, allowing the receiving device to adjust and maintain the desired video view by providing viewpoint, field of view, and viewpoint movement information, ensuring consistent video display despite camera orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If video data is distributed according to camera orientation changes, then the distributed video reflects real-time camera movements, but users cannot maintain a stable intended view
Solution Approach 1:
The video data is divided into segments with each segment containing video area information. This segmentation allows the receiving device to process and adjust individual segments based on user intent, separating the camera's physical movement from the user's intended view direction.
Solution Approach 2:
The system implements feedback by sending video area information from the sending device to the receiving device, which then adjusts the displayed video area accordingly. This closed-loop feedback enables the receiving device to compensate for camera orientation changes and maintain the user's intended view.
2Measurement precision
If video area information is sent with each segment, then the receiving device can adjust video view accurately, but the data transmission volume increases
Solution Approach 1:
Instead of transmitting complete video data multiple times, the patent transmits only the essential video area information (local quality parameters) that describes the spatial characteristics needed for view adjustment. This reduces redundant data transmission while maintaining precision.
3Ease of operation
If the receiving device adjusts video view based on video area information, then user intended view is maintained, but processing complexity increases
Solution Approach 1:
The video area information is prepared and embedded in each segment by the sending device before transmission. This preliminary action allows the receiving device to simply apply pre-calculated adjustment parameters rather than performing complex real-time calculations, reducing processing complexity.
Data Source
AI summary
A sending device that sends, to a receiving device, a content divided into segments includes a generating unit configured to generate data containing information that allows access to each segment, and a communication control unit configured to send, to the receiving device, data generated by the generating unit. The communication control unit is further configured to send, to the receiving device, video area information of each segment.