Image Capturing Apparatus Timecode Synchronization Control
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Solution Overview
Problem
Video apparatuses that synchronize video signals and timecodes using a TC signal face challenges in determining user-controlled synchronization timing and phase adjustment, leading to unnecessary processing and longer adjustment times due to lax standards and limited phase adjustment capabilities.
Innovation Solution
An image capturing apparatus with a terminal for inputting a timecode signal, featuring a first synchronizing unit for synchronization with a timecode superimposed signal, a second synchronizing unit for horizontal and vertical phase synchronization, and a control unit to execute synchronization processing using either unit based on detected TC signals, allowing users to select desired synchronization processing and align phases efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synchronization processing is executed using a TC signal, then connection during installation is made easy, but the video apparatus cannot determine the control desired by the user leading to unnecessary processing
Solution Approach 1:
The patent segments the synchronization processing into two distinct modes: timecode synchronization mode and video signal synchronization mode. The control unit separates the determination of user intent by checking whether a timecode signal is present, and据此 selects the appropriate synchronization mode. This segmentation resolves the contradiction by making the control logic explicit and deterministic, eliminating unnecessary processing while maintaining easy connection through TC signal.
2Reliability
If phase adjustment is executed by controlling clock frequency, then synchronization can be achieved, but adjusting the phase to the desired phase takes a long time
Solution Approach 1:
The patent introduces a dynamic phase adjustment mechanism that operates in two stages: initially adjusting phase by shifting the synchronizing signal timing, and then fine-tuning by controlling clock frequency. This dynamic approach allows the system to reach desired phase alignment quickly through signal timing adjustment, and then achieve precise synchronization through clock control, thereby reducing overall adjustment time while maintaining reliability.
3Adaptability or versatility
If synchronization standards are lax as in SMPTE TC signals, then compatibility is improved, but the time taken for synchronization is more than when using GL signal
Solution Approach 1:
The patent segments the synchronization processing into two distinct pathways: one for timecode signals with lax standards (SMPTE TC) and another for GL signals with strict standards. The control unit determines which pathway to use based on the input signal type. For TC signals, the system extracts both timecode and synchronizing signal components and processes them appropriately, maintaining compatibility while optimizing synchronization speed through targeted processing rather than generic handling.
4Device complexity
If the adjustment range of phase adjustment functions is limited, then device complexity is reduced, but the user may not be able to adjust the phase all the way to the desired phase
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a synchronizing signal extraction and timing adjustment system that works in conjunction with the clock frequency control. This intermediary layer allows the user to adjust phase by shifting the synchronizing signal timing, effectively extending the adjustable phase range without requiring direct changes to the clock frequency range. This resolves the contradiction by providing extended phase adjustment capability while maintaining relatively simple device architecture.
Data Source
AI summary
The invention provides an image capturing apparatus including a terminal for input from an external device of a timecode signal synchronized with video frames, where the apparatus comprises a first synchronizing unit which executes synchronization with a timecode superimposed on the timecode signal input into the terminal, a second synchronizing unit which executes synchronization with horizontal and vertical synchronizing phases of the timecode signal and executes synchronization with the timecode superimposed on the timecode signal, and a control unit which executes synchronization processing by the first synchronizing unit or the second synchronizing unit in a case where a timecode signal input into the terminal is detected.