Display Control Apparatus Synchronizes Image Transfer Timing
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Solution Overview
Problem
Current image transmission systems experience delays in displaying captured screen data from a PC to a projector due to inefficient data transfer and redundant image sending, especially when the screen is unchanged, leading to user discomfort during presentations.
Innovation Solution
A communication system where the display controlling apparatus sends a notification to the image processing apparatus based on computed processing times, allowing the image processing apparatus to capture and send new image data at optimal timing, synchronizing with the display controlling apparatus's processing readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If screen capturing is performed at certain intervals, then image data is continuously transmitted, but redundant images are sent and delay time increases
Solution Approach 1:
The system computes the display processing time in advance before image data is captured and transmitted. Based on this pre-computed time, the image capturing is scheduled to occur at the optimal moment when the display apparatus is ready to receive and process the next image, avoiding redundant transmissions and reducing delay time.
2Loss of time
If screen capturing is performed when the screen is updated, then redundant images are reduced, but the display apparatus may still be decoding previous images causing transfer inefficiency
Solution Approach 1:
The display controlling apparatus computes its display processing time and feeds back this information to the image processing apparatus. This feedback enables the capturing unit to synchronize image capture timing with the display apparatus's processing readiness, ensuring that image data is transmitted only when the display is ready to receive it, thereby improving data transfer efficiency.
3Productivity
If the display apparatus processes images at low speed, then decoding takes longer, but continuous image transmission causes increased delay time
Solution Approach 1:
The system dynamically adjusts the image capturing timing based on the actual display processing speed of the display apparatus. By computing the processing time and using it to determine when to capture the next image, the system adapts to the display apparatus's processing capabilities, ensuring optimal transmission timing regardless of processing speed variations.
Data Source
AI summary
A display controlling apparatus that is capable of communicating with an image processing apparatus that sends image data to the display controlling apparatus in response to a notification from the display controlling apparatus, includes the following elements: a sending unit configured to send the notification to the image processing apparatus; a first receiving unit configured to receive the image data sent from the image processing apparatus in response to the notification; and a first computing unit configured to compute a first time required to display the image data received by the first receiving unit. The sending unit sends a new notification to the image processing apparatus at a timing based on the first time computed by the first computing unit.