Image Signal Processing Timing Adjustment for Display Latency
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Solution Overview
Problem
Conventional image output technologies suffer from fixed frame updating rates, leading to time differences between displayed and input images, which is disadvantageous for applications requiring rapid reactions, and experience issues like stepping and dropping frames when switching between input image signals.
Innovation Solution
A method and system that adjust the timing of output image signals by a processing device to match the resolution and frame rate requirements of a display device, allowing for earlier start and later end of output frame pulses compared to input frame pulses, thereby reducing time differences and improving image quality during switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the frame updating rate is fixed, then the image signal processing is simple, but the time difference between displayed and input images increases, reducing reaction speed
Solution Approach 1:
The patent applies dynamics by making the frame updating rate adjustable rather than fixed. The processing device dynamically changes the frame updating rate based on the specific application requirements, allowing optimization between processing complexity and time difference for different use cases such as gaming versus general media consumption.
Solution Approach 2:
The patent changes the parameter of frame updating rate from a fixed value to a variable parameter that can be adjusted according to needs. This allows the system to reduce the time difference between input and displayed images by increasing the frame updating rate when low latency is critical, while maintaining simplicity when high latency is acceptable.
2Loss of time
If the frame updating rate is increased to reduce time difference, then reaction speed improves, but the complexity of image signal processing increases
Solution Approach 1:
The system dynamically adjusts the frame updating rate based on real-time requirements rather than using a fixed high rate always. This allows the processing device to increase complexity only when needed (high frame updating rate for gaming) while maintaining simplicity for other scenarios, optimizing the trade-off between response speed and processing burden.
Solution Approach 2:
The patent implements parameter changes by allowing the frame updating rate to be variable rather than constant. The processing device can change this parameter adaptively, increasing it when low latency is required and decreasing it when processing resources are limited, thus managing the complexity-time trade-off dynamically.
3Manufacturing precision
If the output image signal timing is adjusted to match display requirements, then image quality during switching improves, but the synchronization complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the processing device receives timing information from the display device and adjusts the output image signal accordingly. This feedback loop allows precise synchronization of frame pulses with display requirements, improving image quality during switching while managing complexity through automated adaptive adjustment rather than manual configuration.
Solution Approach 2:
The processing device performs preliminary timing adjustments by calculating and setting appropriate frame pulse timings before actual image processing occurs. This advance preparation allows the system to pre-synchronize timing parameters with display capabilities, reducing the complexity of real-time synchronization adjustments and improving overall image quality during mode switching.
Data Source
AI summary
A method of generating image signals includes: receiving a first input image signal and a second input image signal by a processing device; outputting, by the processing device, an output image signal having an output resolution according to the first input image signal and the second input image signal; and outputting the output image signal from the processing device to a display device. An ending edge of a first frame image pulse of the first input image signal is at a first moment, an ending edge of a first output frame image pulse of the output image signal is at a second moment, a first time length from the first moment to the second moment is smaller than a time length of the first output frame image pulse.