Image Capture Call-End Timing Using Dual Time Measurements
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Solution Overview
Problem
Existing image capture apparatuses struggle to determine the appropriate timing for ending a video call, and existing technologies do not consider the characteristics of the user device running the online communication application.
Innovation Solution
An image capture apparatus with a connection unit, image capture unit, and control unit that measures time intervals to determine the end of a video call by starting a first time measurement upon receiving an image transmission request and a second time measurement upon transmitting an image, canceling processing when a specified time elapses without further requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image capture apparatus uses conventional time-based methods to determine call end, then the determination timing may be inaccurate, but the device complexity remains low
Solution Approach 1:
The patent divides the time measurement into two separate measurements: first time measurement from image transmission request receipt to image transmission completion, and second time measurement from image transmission completion to next request receipt. This segmentation allows precise tracking of different phases of the communication process, resolving the contradiction by achieving accurate call end determination through structured temporal analysis without requiring a single complex measurement system
Solution Approach 2:
The patent implements dynamic threshold evaluation where the call end determination depends on comparing elapsed times against predetermined thresholds. The system dynamically evaluates whether the first elapsed time exceeds a first threshold or the second elapsed time exceeds a second threshold, allowing flexible and accurate call end detection that adapts to different communication scenarios while maintaining clear decision logic
2Adaptability or versatility
If the image capture apparatus waits for external apparatus to determine call end, then the external apparatus characteristics matter, but the image capture apparatus cannot independently control call end timing
Solution Approach 1:
The patent enables the image capture apparatus to independently determine call end timing by monitoring its own transmission activities and elapsed times. The control unit self-evaluates whether to end the video call based on predetermined thresholds without requiring the external apparatus to initiate or control the determination process, achieving both independence from external device characteristics and reliable call end detection through self-monitoring of transmission patterns
3Loss of time
If the image capture apparatus continuously monitors for call end, then call end can be detected promptly, but energy consumption increases
Solution Approach 1:
The patent implements periodic time measurement triggered by specific events rather than continuous monitoring. The first time measurement starts when an image transmission request is received, and the second time measurement starts when image transmission completes. This event-driven periodic measurement approach promptly detects call end conditions while consuming energy only when necessary, resolving the contradiction between fast detection and energy efficiency
Data Source
AI summary
An image capture apparatus comprises a connection unit that connects to an external apparatus, an image capture unit that captures an image, and a control unit that executes processing to transmit an image captured by the image capture unit to the external apparatus connected via the connection unit in response to a reception of an image transmission request from the external apparatus. The control unit starts a first time measuring in response to the external apparatus completing a reception of an image and starts a second time measuring in response to the control unit transmitting an image to the external apparatus, and cancels a state of executing the processing when a first amount of time elapses since the first time measuring has started or when a second amount of time elapses since the second time measuring has started.