Camera Communication Parity Bit Mode Detection
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Solution Overview
Problem
Existing camera systems face issues with accurately detecting differences in communication modes between the camera body and interchangeable lenses, leading to potential communication errors due to noise in the communication path, which can cause incorrect mode switching and failure in burst communication.
Innovation Solution
Implementing a system with two communication modes and using different parity bit settings for each mode, allowing the camera body and interchangeable lens to quickly detect and correct mode mismatches by monitoring parity errors, thereby ensuring reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication speed is increased to handle larger data amounts, then communication efficiency is improved, but communication errors due to noise increase
Solution Approach 1:
The patent changes the parameter of parity bit settings between two communication modes. In normal mode, one parity bit configuration is used, while in burst mode, a different parity bit configuration is applied. This parameter change enables the receiving device to detect mode mismatches caused by noise-induced erroneous mode switching, thereby resolving the contradiction between maintaining high communication speed and ensuring communication reliability.
2Speed
If burst communication mode is used to increase data transmission speed, then communication efficiency is improved, but susceptibility to noise-induced mode switching errors increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device monitors parity bits in incoming data to detect whether the communication mode matches the expected mode. When a mismatch is detected (indicating erroneous mode switching due to noise), the receiving device generates a mode correction command and sends it back to the transmitting device. This feedback loop ensures reliable mode switching while maintaining high-speed burst communication capability.
3Adaptability or versatility
If communication mode switching is implemented to handle varying data amounts, then communication adaptability is improved, but detection of mode differences becomes more complex
Solution Approach 1:
The patent simplifies mode detection by changing specific parameters (parity bit settings) that differ between normal and burst communication modes. The receiving device only needs to check these specific parity bit parameters to determine the communication mode, rather than analyzing complex mode indicators. This approach maintains communication adaptability while reducing detection complexity.
Data Source
AI summary
The image-capturing apparatus includes a camera communicator configured to provide, with the accessory apparatus, a first data communication channel used for transmitting accessory data from the accessory apparatus to the image-capturing apparatus, and a second data communication channel used for transmitting camera data from the image-capturing apparatus to the accessory apparatus; and a camera controller configured to perform communication with the accessory apparatus through the camera communicator. The camera controller and the accessory apparatus are configured to be capable of switching their communication modes between a first communication mode and a second communication mode. The camera controller is configured to cause the accessory apparatus to transmit the accessory data whose settings of parity bits are different between in the first and second communication modes.