Multi-Source Video Switching With Source-Based Output Wait Timing
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Solution Overview
Problem
Existing video signal processing systems face challenges in synchronizing the output timing of video signals from multiple sources, leading to delayed display of images from cameras when an immediate request is made, as they wait for the output timing of the last signal, which may not be satisfied promptly.
Innovation Solution
A video signal processing apparatus with a controller that receives video signals from multiple sources and adjusts the wait time for output based on the specific video source specified, allowing for immediate display of camera images by setting shorter wait times for camera sources and longer times for SoC image rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the system waits for the output timing of the last output video signal to synchronize multiple video sources, then the synchronization between video sources is improved, but the display delay increases and immediate display requests cannot be satisfied
Solution Approach 1:
The patent applies dynamics by making the wait time variable rather than fixed. The controller dynamically adjusts the wait time based on the video source type: using a first wait time for camera images and a second wait time for SoC images. This dynamic adjustment allows the system to optimize between synchronization and display speed for different source types, resolving the contradiction between maintaining synchronization and reducing display delay.
2Device complexity
If a fixed wait time is used for all video sources, then the system complexity is reduced, but the ability to satisfy immediate display requests for camera images deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the wait time parameter based on the video source type. Instead of using a uniform wait time for all sources, the system applies a first wait time specifically for camera images and a second wait time for SoC images. This localized optimization allows camera images to be displayed immediately while maintaining appropriate timing for other sources, improving display speed without requiring complex dynamic adjustment mechanisms.
Data Source
AI summary
A video signal processing apparatus according to an embodiment includes a controller. The controller receives (i) a plurality of video signals from a plurality of video sources including a camera and (ii) a specifying signal that specifies which one of the video signals is to be output to a display apparatus. The controller changes a wait time from an input of the specifying signal to an output of the video signal specified by the specifying signal to the display apparatus based on which one of the plurality of the video sources corresponds to the video signal specified by the specifying signal.