Onboard Screen Casting Layer to Cut Host-VM Video Delay
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Solution Overview
Problem
Existing onboard screen casting systems experience significant delay and resource waste due to multiple transmissions of video data between the host and virtual machine systems, necessitating a solution that reduces data flow transmissions without additional hardware.
Innovation Solution
The proposed system integrates a screen casting layer within the host system, allowing direct decoding and visibility settings on the host system, while transparently managing virtual machine system layers to minimize data retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If video decoding and display are performed within the virtual machine system, then the virtual machine can manage display resources, but the video data must be transmitted multiple times between host and guest systems causing large delay
Solution Approach 1:
The patent extracts the screen casting layer from the virtual machine system and places it in the host system. The host system receives bit stream data, decodes it, and performs visibility settings directly without transmitting decoded video data back to the virtual machine. This extraction eliminates the round-trip transmission and reduces delay while maintaining virtual machine resource management capabilities.
2Productivity
If the screen casting layer is placed in the virtual machine system, then the virtual machine can control display, but the video stream data must be transmitted back to the host system for display causing resource waste
Solution Approach 1:
The host system performs self-service by directly decoding the bit stream data and managing the screen casting layer itself. Instead of relying on the virtual machine to manage display resources and then transmitting data back, the host system independently handles the decoding and visibility settings, eliminating unnecessary data transmissions and reducing resource consumption.
3Adaptability or versatility
If multiple operating systems run on the hypervisor-based host, then smartphone integration functions can be realized, but each OS needs separate video encoding/decoding and casting layers increasing transmission overhead
Solution Approach 1:
The patent implements a universal screen casting layer in the host system that serves multiple operating systems. Instead of each OS having its own separate casting layer and video processing pipeline, the host system's screen casting layer handles video decoding and visibility settings for all OSes, providing a unified multi-functional architecture that reduces overall system complexity.
Data Source
AI summary
The present disclosure provides an onboard screen casting system, an onboard screen casting method, and a computer-readable storage medium. The onboard screen casting system includes a host system and a virtual machine system; wherein, the virtual machine system is able to receive external bit stream data to be cast and transmit it to the host system; and the host system is able to decode the bit stream data into video stream data, and perform a visibility setting on the video stream data, to display the corresponding video.