Analog Image Signal Synchronization via Embedded Camera Control
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Solution Overview
Problem
Existing systems for transmitting and receiving analog image signals face security challenges when using separate control cables and struggle with synchronization issues among multiple image signals due to differences in channel lengths and system clocks.
Innovation Solution
Analog image signal reception and transmission methods that include generating a camera initialization signal, detecting synchronization information, adjusting image signal lengths based on timing differences, and using synchronization mask signals to synchronize and correct timing discrepancies among multiple analog image signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate control cable is used to transmit commands, then control functionality is achieved, but system security deteriorates
Solution Approach 1:
The patent combines control signal transmission and image signal transmission into a single cable by superimposing control signals onto the image signal cable. The control signals are embedded in the vertical blanking interval of the analog image signal, allowing both functions to share the same physical medium while maintaining security by eliminating separate control cables that could be tapped.
2Adaptability or versatility
If multiple analog image signals are transmitted through channels of different lengths, then multi-camera support is achieved, but timing synchronization deteriorates
Solution Approach 1:
The patent employs a feedback mechanism where the receiver detects timing differences between multiple analog image signals and sends timing correction information back to the transmitters. Each transmitter adjusts its output timing based on this feedback to achieve synchronized arrival at the receiver, compensating for differences in channel lengths.
Solution Approach 2:
The system dynamically adjusts the timing parameter of transmitted analog image signals based on detected synchronization errors. By changing the transmission timing parameter in response to measured deviations, the system achieves synchronized reception despite varying channel lengths.
3Device complexity
If analog image signals are transmitted without timing correction, then transmission simplicity is maintained, but image signal alignment deteriorates
Solution Approach 1:
The system performs preliminary timing adjustment by embedding camera initialization signals that include timing information. The receiver uses this preliminary timing data to pre-calculate required corrections and apply them before full image transmission begins, reducing the need for continuous complex adjustments.
Data Source
AI summary
The present invention may comprise: in order to receive an analog image signal, generating a camera initialization signal including operation period information of a camera; transmitting the camera initialization signal to a plurality of analog image signal transmission apparatuses; determining whether or not each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal; if determining that each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal, simultaneously transmitting a transmission command signal to the plurality of analog image signal transmission apparatuses; and receiving a plurality of analog image signals from the plurality of analog image signal transmission apparatuses.