Image Data Stream Phase Synchronization Initialization
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Solution Overview
Problem
The phase shift between display image data streams and recording image data streams in image-transferring systems, such as endoscopy systems, leads to a time delay and potential switching off or search mode initiation during the changeover, which is undesirable, especially in medical interventions.
Innovation Solution
An initialization method that calculates and applies a correction value to phase-shift the recording image data stream, synchronizing it with the display image data stream using sync signals, thereby preventing or minimizing time delays and ensuring real-time reproduction of recorded images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a data buffer (ring memory) is set up between the image sensor and display unit to equalize phase offset, then the phase shift between display image data stream and recording image data stream is compensated, but a time delay occurs in the recording image data stream transfer to the display unit
Solution Approach 1:
The system calculates the phase shift value between display and recording image data streams in advance, before the actual image transfer occurs. This correction value is determined preliminarily and used to adjust the recording image data stream timing, preventing the need for large buffer memory and reducing time delay while maintaining synchronization reliability
Solution Approach 2:
The system dynamically adjusts the timing parameter of the recording image data stream by applying a calculated phase shift correction. This parameter change aligns the recording image data stream with the display image data stream, resolving the phase shift issue without requiring excessive buffering that would cause time delay
2Ease of operation
If the image recording apparatus is supplied with power and switched on only upon connection to avoid phase shift, then connection simplicity is maintained, but the phase shift can lead to the display unit changing to search mode and/or switching off during changeover
Solution Approach 1:
The image recording apparatus is powered on and initialized in advance, before the actual image transfer begins. This preliminary power-on allows the system to calculate the phase shift value and prepare the correction, ensuring signal continuity and preventing display unit search mode activation while maintaining simple connection procedures
Solution Approach 2:
The system implements a feedback mechanism where the phase shift between display and recording image data streams is continuously monitored and measured. Based on this feedback, a correction value is calculated and applied to the recording image data stream timing, ensuring reliable synchronization without compromising connection simplicity
Data Source
AI summary
An initialization method for initializing a transfer of a recording image data stream from an image sensor of an image recording apparatus to a display unit, wherein initially a display image data stream in the form of a test image is transferred from an image processing apparatus to the display unit and a recording image data stream is transferred from an image recording apparatus to the image processing apparatus. A changeover of a reproduction on the display unit to the recording image data stream is preceded by a correction value being calculated for a phase shift between the display image data stream and the recording image data stream and being transferred to the image recording apparatus, and the recording image data stream is phase-shifted by the correction value. Subsequently the display image data stream is changed over to the recording image data stream (21) and the image recorded by the image sensor or the sequence of images is reproduced with the display unit.