Video Signal Transmission Pulse Synchronization for Frame Rate Mismatch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inconsistent frame rates between the signal output and input sides of ultra-high-definition displays can lead to timing errors, resulting in dropped or duplicated frames due to unsynchronized timing, which affects the image display quality.
Innovation Solution
A method and apparatus for transmitting video signals that generate a pulse synchronization signal based on the source timing signal and output frame rate, ensuring the cycle of the pulse synchronization signal is an integer multiple of both, thereby synchronizing the source and display module timing and preventing clock errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the frame rate of the signal output side is fixed (e.g., 60 or 120 Hz), then the display module can maintain stable output timing, but timing inconsistency occurs with variable frame rate input signals (e.g., 24, 25, or 59.94 Hz), resulting in dropped or duplicated frames
Solution Approach 1:
The patent introduces a pulse synchronization signal as an intermediary between the source timing signal and the output timing signal. This pulse synchronization signal has a cycle that is an integer multiple of both the source timing signal cycle and the output frame rate cycle, serving as a common reference that reconciles the timing differences between variable frame rate input and fixed frame rate output, thereby preventing dropped or duplicated frames
Solution Approach 2:
The patent changes the parameter of the synchronization signal cycle to be an integer multiple of both the source timing signal cycle and the output frame rate cycle. This parameter adjustment allows the system to accommodate variable frame rate inputs while maintaining stable fixed frame rate output, resolving the timing inconsistency problem
Data Source
AI summary
Provided is a method for transmitting video signals, including: receiving an input video signal provided by a source, wherein the input video signal includes an image signal and a source timing signal; generating a pulse synchronization signal based on the source timing signal and an output frame rate, wherein the output frame rate is a frame rate of outputting the image signal to a display module, and a cycle of the pulse synchronization signal is an integer multiple of a cycle of the source timing signal, and is an integer multiple of a cycle corresponding to the output frame rate; generating an output timing signal based on the pulse synchronization signal; and transmitting an output video signal to the display module, wherein the output video signal includes the image signal and the output timing signal.