Video Synchronous Display via Status Information Extraction
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Solution Overview
Problem
Current video synchronous display technologies require high transmission bandwidth and complex system-level authentication, limiting wireless screen-sharing capabilities and increasing hardware costs for VR devices.
Innovation Solution
A method and system for video synchronous display that transmits video status information, including identification and progress data, between user equipment and target devices, allowing for intelligent network selection and suppression calculations to reduce bandwidth requirements and improve synchronization, without the need for image mirroring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video images are transmitted from VR device to target device for screen sharing, then synchronous display is achieved, but transmission bandwidth requirements increase
Solution Approach 1:
The patent extracts only the essential video status information (identification, progress, playback state) from the complete video image data, transmitting only this extracted information to the target device. This allows the target device to independently reconstruct and display the video synchronously without receiving the full video stream, significantly reducing bandwidth requirements while maintaining synchronous display reliability
Solution Approach 2:
The patent introduces video status information as an intermediary element between the VR device and target device. Instead of directly transmitting video images, the system uses this intermediate status information to enable synchronous display. The status information acts as a mediator that allows the target device to synchronize its display with the VR device without requiring high-bandwidth video stream transmission
2Ease of operation
If MIRACAST authentication is implemented between VR device and target device, then wireless screen sharing is enabled, but system-level support requirements increase device complexity
Solution Approach 1:
The patent copies the essential screen sharing functionality to the application level rather than requiring system-level MIRACAST authentication. By implementing video status information transmission and synchronization at the application layer, the solution replicates the core screen sharing capability without depending on complex system-level wireless display protocols, thereby reducing device complexity requirements while maintaining ease of operation
Solution Approach 2:
The patent segments the screen sharing functionality into independent application-level components (video status collection, status transmission, synchronized playback control) rather than relying on integrated system-level authentication protocols. This segmentation allows the feature to be implemented without requiring comprehensive system-level support, reducing the complexity burden while preserving wireless screen sharing ease of use
3Quantity of substance
If video status information is transmitted instead of complete video images, then bandwidth requirements are reduced, but synchronization precision may be affected
Solution Approach 1:
The patent changes the parameters being transmitted from pixel-level video image data to temporal-parameter video status information (playback position, playback state, timestamp). This parameter transformation reduces data volume significantly while maintaining synchronization accuracy, as the essential timing and state information needed for precise synchronization is preserved in the status parameters rather than in the visual image data itself
Data Source
AI summary
A method performed by user equipment for video synchronous display includes playing a first video, receiving an indication of starting synchronous display with a target device, in response to the synchronous display indication, obtaining status information of the first video, where the video status information is used by the target device and the user equipment to synchronously play an image of the first video, and sending the video status information to the target device. The video status information may include video identification information and video playing progress information, or the video status information may include user posture data.