Video Signal Processing Circuit Bypass Mode for Latency Reduction
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Solution Overview
Problem
Conventional video signal processing circuits introduce signal processing delays, particularly when enhancing picture quality, which can lead to unsynchronization with user input in interactive applications like games, causing potential missed key inputs due to delays exceeding 100 msec.
Innovation Solution
A video signal processing circuit and display apparatus that allows users to select a bypass mode to bypass picture quality improving functions, reducing signal processing time by selectively bypassing components like de-interlacers and image-enhancers, thereby controlling the signal processing path through switches and a controller to prioritize reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If picture quality improving functions (de-interlacer, image-enhancer) are used, then picture quality is improved, but signal processing delay increases
Solution Approach 1:
The patent implements dynamic switching between two signal processing paths: a full processing path that includes picture quality improving functions (de-interlacer, image-enhancer) and a bypass path that skips these functions. The system can dynamically select which path to use based on real-time requirements, allowing users to trade off between picture quality and processing speed as needed.
Solution Approach 2:
The signal processing circuit is segmented into distinct functional blocks: a processor, picture quality improving functions (de-interlacer, image-enhancer), and a bypass path with switching mechanisms. This segmentation allows independent control of each function and enables selective activation/deactivation of picture quality improving functions through the switching system.
2Loss of time
If signal processing delay is reduced by bypassing picture quality improving functions, then user input synchronization is improved, but picture quality deteriorates
Solution Approach 1:
The system provides dynamic control over signal processing depth, allowing users to switch between full processing (high quality, high delay) and bypass mode (low delay, reduced quality). This dynamic adaptability enables the system to optimize performance for different application scenarios such as interactive gaming versus static image display.
Solution Approach 2:
The patent changes the processing parameter by selectively enabling or disabling picture quality improving functions. When the bypass mode is activated, the system alters the processing parameters by skipping the de-interlacer and image-enhancer stages, thereby reducing processing delay at the cost of picture quality.
3Device complexity
If a fixed signal processing path is used, then system complexity is reduced, but adaptability to different application needs deteriorates
Solution Approach 1:
The patent implements a universal signal processing architecture that can serve multiple functions: full picture quality enhancement for static content, bypass mode for interactive applications requiring low latency, and intermediate modes. The switching mechanism and control system enable a single device to adapt to diverse application requirements without requiring separate dedicated systems.
Data Source
AI summary
A display apparatus having a display. The display apparatus includes a video signal processor having a processor to process an input video signal and a picture quality improving part to improve picture quality of the processed video signal. The video signal processor processes the video signal through a path that includes a signal processing path to selectively bypass the picture quality improving part. The display apparatus further includes a selection input part through which the user selects a bypass mode corresponding to the signal processing path. Finally, the display apparatus has a controller controlling the video signal processor to output the video signal processed through the processor to the display after bypassing the picture quality improving part when the user selects the bypass mode through the selection input part. Thus, the picture quality improving function may be omitted to thereby reduce signal processing time.