Image Link Lock Signaling With Error-Checked Notification Data
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Solution Overview
Problem
The reliability of notification information in image transmission systems using V-by-One communication is compromised due to the vulnerability of single-ended LOCKN signals to noise, leading to potential errors in direct superimposition on the lock signal.
Innovation Solution
An image transmission and reception system that includes a lock signal transmission control unit adding error detection information to code information, converting it into serial data, and a lock signal receiving control unit validating the data for consistency before outputting the lock signal, thereby enhancing the reliability of notification information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If notification information is directly superimposed on the LOCKN signal for transmission, then the device complexity is reduced and ease of operation is improved, but the reliability of notification information deteriorates due to noise vulnerability
Solution Approach 1:
The notification information transmission is segmented into multiple independent components: code information carrying the logical state, error detection information for validation, and notification information for status updates. This segmentation allows each component to be transmitted separately through the differential signal line, enabling error detection and validation without requiring additional dedicated signal lines, thus maintaining simplicity while improving reliability
Solution Approach 2:
Error detection information acts as an intermediary mechanism between the transmitted code information and the received notification information. The receiving apparatus uses this intermediary to validate the integrity of received data by checking consistency between code information and error detection information, thereby filtering out noise-induced errors before they affect the final notification information interpretation
2Reliability
If error detection information is added to code information and transmitted as serial data, then the reliability of notification information is improved, but the device complexity increases
Solution Approach 1:
The existing LOCKN signal path is made multi-functional by using it to transmit not only the traditional lock status but also code information, error detection information, and notification information all through the same differential signal line. This universal usage of the existing signal path avoids adding new hardware lines, so while processing complexity increases slightly, hardware complexity remains unchanged
Solution Approach 2:
The signal transmission parameters are changed from simple voltage levels to multi-level serial data encoding. Code information and error detection information are encoded as serial data sequences that can represent multiple states, enabling richer information transmission through the same physical medium without requiring additional signal lines, thus managing complexity through parameter optimization rather than structural expansion
Data Source
AI summary
An image transmission and reception system includes an image reception apparatus including a receiving circuit that extracts a clock signal from transmission data transmitted from an image transmission apparatus, acquires image data from the transmission data by using the extracted clock signal, and in a case where the clock signal is extractable from the transmission data, changes a lock signal, which indicates whether or not communication is established, from a first logical state indicating that the communication is not established to a second logical state indicating that the communication is established, and a lock signal transmission control unit that adds error detection information calculated by using code information, which includes information on a logical state of the lock signal output from the receiving circuit and notification information other than the logical state of the lock signal, to the code information, and outputs the code information with the error detection information as serial data to the image transmission apparatus, and the image transmission apparatus including a transmission circuit that transmits the transmission data in which the clock signal is superimposed on the image data to the image reception apparatus in a case where an input lock signal changes from the first logical state to the second logical state, an image transmission control unit that controls transmission of the image data to the image reception apparatus via the transmission circuit, and a lock signal receiving control unit that receives the serial data transmitted from the image reception apparatus, outputs notification information corresponding to the code information included in the received serial data to the image transmission control unit in a case where there is no inconsistency between the code information and the error detection information included in the received serial data, and outputs the lock signal in the logical state indicated by the code information to the transmission circuit.