Shared Video Link Timing to Prevent Control Signal Interference
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Solution Overview
Problem
The existing methods for transmitting both high-speed video signals and low-speed control signals over a common transmission line face interference issues during transient states, leading to transmission errors, which are particularly problematic for control signals as they can result in unintended settings for image sensors, causing subsequent video signal failures.
Innovation Solution
A video signal transmitting and receiving system with a controller that adjusts the timing of video signal transmission and condition changes to suppress interference between video and control signals during transient states, ensuring the control signal is not transmitted during this period, thereby preventing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If both video signal and control signal are transmitted over a common transmission line, then cost is reduced and device complexity is simplified, but interference occurs during transient states leading to transmission errors
Solution Approach 1:
The system performs preliminary actions by detecting the start of video signal transmission and proactively suspending control signal transmission before interference can occur. The controller monitors video signal transmission status and preemptively stops control signal transmission during transient states, preventing transmission errors before they happen.
Solution Approach 2:
The controller acts as an intermediary between the video signal transmission system and control signal transmission system. It coordinates the timing of both signals, detecting video signal transmission states and accordingly controlling the suspension or resumption of control signal transmission, thereby mediating the interference problem between the two signals.
2Reliability
If control signal transmission is suspended during video signal transient state, then transmission errors are prevented, but transmission time for control signals increases
Solution Approach 1:
The system implements periodic action by suspending control signal transmission only during specific transient states of video signal transmission and resuming it during stable states. This periodic suspension and resumption allows control signals to be transmitted efficiently during safe time windows while avoiding interference during problematic transient periods.
Solution Approach 2:
The controller detects video signal transmission status in advance and proactively suspends control signal transmission before interference occurs. By detecting the start of video transmission and preemptively stopping control signals, the system prevents errors without requiring lengthy error handling or retransmission sequences.
3Adaptability or versatility
If image sensor settings are changed frequently to adapt to changing imaging environments, then adaptability improves, but control signal transmission opportunities increase leading to more interference
Solution Approach 1:
The system implements dynamic coordination between video signal transmission and control signal transmission. The controller continuously monitors video signal transmission states and dynamically adjusts control signal transmission timing accordingly. This dynamic adaptation allows the system to maintain both adaptability for image sensor settings and reliability for control signal transmission.
Solution Approach 2:
The system uses feedback mechanisms where the controller detects the transmission status of video signals and uses this information to control the timing of control signal transmission. This feedback loop ensures that control signals are only transmitted when video signal transmission is stable, preventing interference while allowing frequent setting changes when needed.
Data Source
AI summary
The video signal transmission and reception system performs transmission of a video signal and a control signal between the video signal transmitting device and the video signal receiving device via a common transmission line. The video signal transmitting device includes a video signal transmitter, a control signal transmitter and receiver, a filter circuit, a controller, and a camera. The video signal receiving device includes a video signal receiver, a control signal transmitter and receiver, a filter circuit, and a controller. By performing time management control performed by the controller or the controller such that the period of the transient state of transmission of the video signal is within the non-communication period of the control signal, interference between the video signal and the control signal in the period of the transient state of transmission of the video signal is suppressed.