Camera System Switching Device Bandwidth Management
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Solution Overview
Problem
Existing camera systems experience quality degradation due to insufficient network bandwidth during video signal transmission, leading to packet collisions and delays, especially when multiple high-bit-rate cameras are used.
Innovation Solution
A camera system that includes multiple network-connected camera devices and a switching device which synchronizes video signals using a reference signal, prioritizes image transmission based on user operation, and delays non-priority image transmission to avoid network congestion, ensuring priority images are transmitted without failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple high-bit-rate camera devices transmit video signals simultaneously via network, then the quantity of video signals transmitted is increased, but network bandwidth becomes insufficient causing packet collisions and quality degradation
Solution Approach 1:
The switching device transmits a reference signal to camera devices before video signal transmission begins, enabling each camera to pre-calculate its transmission timing. This preliminary timing assignment prevents simultaneous transmission conflicts and packet collisions on the network, ensuring reliable video signal transmission for multiple high-bit-rate cameras without quality degradation
Solution Approach 2:
The system dynamically adjusts transmission timing for each camera device based on its position in the signal chain and bandwidth requirements. By making transmission timing variable rather than simultaneous, the system optimizes network bandwidth utilization and prevents congestion while maintaining high video signal transmission quality for all connected cameras
2Productivity
If all camera devices transmit video signals at the same time, then transmission efficiency is improved, but network congestion occurs causing packet loss and delays
Solution Approach 1:
Transmission timing is predetermined by the switching device through reference signal transmission before actual video signal transmission. Each camera device receives instructions on when to transmit, eliminating the need for simultaneous transmission attempts that cause network congestion and packet delays
Solution Approach 2:
The system implements periodic transmission timing where camera devices transmit video signals at predetermined intervals rather than simultaneously. This periodic approach, coordinated by the switching device's reference signals, maintains high transmission efficiency while preventing network overload and packet loss
3Reliability
If network bandwidth is increased to accommodate all camera signals, then video signal transmission quality is improved, but system cost and complexity increase
Solution Approach 1:
Instead of requiring increased network bandwidth, the system dynamically manages existing bandwidth resources through intelligent timing control. The switching device coordinates transmission schedules that fully utilize available bandwidth without requiring infrastructure upgrades, maintaining high video signal quality while avoiding increased system complexity
Solution Approach 2:
The system changes the timing parameter of video signal transmission rather than increasing bandwidth. By adjusting when each camera transmits based on predetermined schedules from reference signals, the system maintains transmission quality within existing bandwidth constraints without adding system complexity
Data Source
AI summary
A camera system includes a plurality of camera devices and a switching device. The switching device transmits a reference signal to the camera devices via a network. Each of the camera devices transmits a video signal based on the time when the camera device receives the reference signal. The switching device determines one or more priority images for transmitting video signals with priority, in accordance with operation by a user. The camera system has a configuration in which transmission of a video signal from each of one or more of the camera devices not capturing the one or more priority images is delayed relative to transmission of a video signal from each of one or more of the camera devices capturing the one or more priority images.