Interchangeable Lens Video Frame Synchronization
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Solution Overview
Problem
Existing camera systems face challenges in transmitting sufficient lens information in a timely manner, particularly during point image restoration processes in video mode, due to limitations in communication frequency and speed, and require additional terminals which increase production costs and risk of communication failure.
Innovation Solution
A camera system that includes a camera body and interchangeable lens with a communication method where the lens transmits information synchronously with video frames without a request signal, allowing for rapid and efficient transmission of lens information during video recording mode, and includes a communication mode switching unit to adapt to changing information needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the request-response scheme is used for communication between camera body and interchangeable lens, then the camera body can acquire lens information when necessary, but the communication frequency increases and acquisition of necessary information may not be in time when point image restoration process is performed in video mode
Solution Approach 1:
The interchangeable lens proactively transmits lens information to the camera body in advance, before the camera body requests it. This preliminary transmission ensures that lens information is already available when needed for point image restoration processing, eliminating delays associated with request-response cycles and enabling timely acquisition of information.
Solution Approach 2:
The lens transmits information in synchronization with video frames at regular periodic intervals. This periodic transmission strategy ensures that lens information is updated at appropriate timing for each frame processed, maintaining communication efficiency while ensuring information availability for image processing operations.
2Adaptability or versatility
If additional terminals are added for first and second transmission paths, then bidirectional communication capability is improved, but production costs increase and risk of communication failure increases
Solution Approach 1:
The single transmission path is designed to perform multiple functions: it supports both unidirectional transmission (lens to camera body) and bidirectional communication (camera body to lens and back). By making the transmission path universal and multi-functional, the patent eliminates the need for separate first and second transmission paths, reducing terminal count while maintaining full communication capability.
Solution Approach 2:
The patent merges the functionality of separate first and second transmission paths into a single unified transmission path. This consolidation combines multiple communication functions into one path, reducing the number of terminals required and simplifying the overall communication architecture while maintaining bidirectional communication capability.
Data Source
AI summary
In a camera system including a camera body (200) and an interchangeable lens (100), the camera body includes a body-side communication unit, and a body-side control unit that transmits a request signal to the interchangeable lens via the body-side communication unit, and receives a response signal corresponding to the transmitted request signal from the interchangeable lens via the body-side communication unit, the interchangeable lens includes a lens-side communication unit, and a lens-side control unit that transmits the response signal corresponding to the received request signal to the camera body via the lens-side communication unit when receiving the request signal via the lens-side communication unit, and the lens-side control unit transmits lens information in synchronization with a frame of a video without receiving a request signal for lens information from the camera body at least in a video recording mode.