Coaxial Signal Distribution for Reverse Control Transmission
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Solution Overview
Problem
Existing video distribution systems lack the capability to transmit reverse control signals over coaxial cables, necessitating additional cables for control signal management, especially in high definition video transmission where control signals are embedded within the video signal.
Innovation Solution
A signal distribution system that includes signal extraction and superimposing circuits to detect and enhance reverse control signals, allowing them to be transmitted over coaxial cables without additional cables, ensuring proper control signal reception and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If reverse control signals are embedded in the video signal for HD transmission, then cable quantity is reduced, but the existing video distributor cannot transmit the reverse control signal
Solution Approach 1:
The video distributor is enhanced with signal extraction and superimposing circuits that enable it to handle both video signals and reverse control signals through the same coaxial cable. The distributor becomes multi-functional by extracting control signals from incoming video signals and superimposing them onto outgoing video signals, allowing a single cable to carry both signal types bidirectionally.
Solution Approach 2:
The signal extraction circuit acts as an intermediary that separates the reverse control signal from the composite video signal. The superimposing circuit then acts as another intermediary that combines the extracted control signal with the outgoing video signal. These intermediary circuits enable the bidirectional transmission capability without requiring separate cables.
2Reliability
If additional cables are used for reverse control signals, then control signal transmission is reliable, but device complexity and installation difficulty increase
Solution Approach 1:
The patent merges the video signal transmission function and reverse control signal transmission function into a single coaxial cable system. By combining both signal types into one cable, the system reduces cable management complexity and installation difficulty while maintaining reliable control signal transmission through the dedicated extraction and superimposing circuits.
3Adaptability or versatility
If the video distributor transmits both video and control signals, then coaxial control function is achieved, but signal interference may occur
Solution Approach 1:
The signal extraction circuit selectively extracts the reverse control signal from the composite video signal by detecting specific voltage levels or signal characteristics. This extraction process separates the control signal from the video signal, preventing interference while maintaining the ability to transmit both signals through the same cable.
Solution Approach 2:
The distributor dynamically switches between video signal distribution mode and control signal extraction/superimposition mode. The system adapts its operation based on the signal direction and type, using the extraction circuit for incoming control signals and the superimposing circuit for outgoing control signals, thereby managing signal interference through dynamic operational changes.
Data Source
AI summary
A system may comprise at least one signal input circuit configured to receive target input signals from at least one sensor device; at least one signal processing unit. Each of the at least one signal processing unit may include at least one signal output circuit configured to output signals to a first electronic connection; and at least one signal extraction circuit configured to obtain a reverse control signal from the first electronic connection; and at least one signal superimposing circuit configured to generate superimposed reverse control signals by superimposing the first reverse control signal with other electronic signals, and output the superimposed reverse control signal to the signal input circuit.