LOCKN Signal Masking in Image Transmission for Stable Data Transfer
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Solution Overview
Problem
The existing V-by-One image transmission systems face issues with low noise immunity in the LOCKN signal, leading to unnecessary cessation of image data transfer due to noise-induced logic state variations, despite ongoing communication.
Innovation Solution
Incorporating a LOCKN-signal masking unit and a LOCKN-signal transmission controller in the image transmitting apparatus to filter out transient noise effects, ensuring the LOCKN signal maintains its logic state for a preset time or undergoes specific variations before affecting the transmission circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LOCKN signal is directly input to the transmission circuit without masking, then the response time to logic state changes is fast, but noise immunity deteriorates causing unnecessary cessation of image data transfer
Solution Approach 1:
The lock-signal masking unit performs preliminary filtering of the LOCKN signal before it reaches the transmission circuit. By anticipating potential noise interference and applying masking in advance, the system prevents false logic state transitions from triggering unnecessary data transfer cessation, thus maintaining reliability without significant time loss.
Solution Approach 2:
The lock-signal masking unit acts as an intermediary between the LOCKN signal source and the transmission circuit. This mediator filters out noise-induced transient variations while preserving genuine logic state changes, allowing the transmission circuit to respond accurately to valid signal transitions without being affected by noise, thereby resolving the contradiction between noise immunity and response time.
2Reliability
If the LOCKN signal is filtered through a masking unit, then noise immunity is improved, but the device complexity increases
Solution Approach 1:
A lock-signal masking unit is introduced as an intermediary component between the LOCKN signal source and the transmission circuit. This mediator filters out noise-induced transient variations while preserving genuine logic state changes, allowing the transmission circuit to respond accurately to valid signal transitions without being affected by noise, thereby resolving the contradiction between noise immunity and response time.
Solution Approach 2:
The masking unit applies parameter-based filtering by comparing the duration of logic state transitions against predefined thresholds. Genuine transitions that meet the threshold criteria are passed through, while transient noise variations below the threshold are blocked. This parameter-change approach provides effective noise immunity with minimal added complexity, as it uses simple temporal comparison rather than complex signal processing algorithms.
Data Source
AI summary
An image transmitting apparatus includes: a transmission circuit that, in response to an input lock signal switching from a first logic state to a second logic state, transmits, to an image receiving apparatus, transmission data, the transmission data being data in which a clock signal is superimposed on image data, the first logic state indicating that communication has not been established, the second logic state indicating that communication has been established; and a lock-signal masking unit that receives the lock signal from the image receiving apparatus, and that, even when the received lock signal enters the second logic state and then varies to the first logic state, only in the case where the first logic state continues for a preset time or longer, outputs a lock signal of the first logic state to the transmission circuit.