Display Noise Processor Using Frequency Domain Sync Analysis
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Solution Overview
Problem
Display apparatuses face challenges in maintaining image quality due to noise interference, especially with analog video signals, as they become miniaturized and the number of broadcasting channels increases, making it difficult to effectively remove noise without increasing the control board size or setting specific frequency bands for noise occurrence.
Innovation Solution
A display apparatus with a noise processor that determines the frequency position information of interference signals in the sync sections of the video signal, applies FFT, and filters out the interference, integrating noise processing with video processing as a system-on-chip (SOC), allowing for selective image compensation based on user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control board size is increased to add noise removal functionality, then the image quality is improved, but the device size increases
Solution Approach 1:
The patent merges the noise removal function with the existing video processing unit by integrating the noise processor into the same control board that handles video signal processing. This is achieved by implementing the noise removal algorithm as software or firmware within the existing video processing architecture, allowing both video processing and noise removal to be performed by the same hardware resources without increasing the overall control board size.
Solution Approach 2:
The video processing unit is designed to perform multiple functions including both standard video processing and noise removal operations. By making the control board universal and capable of handling different processing tasks through software configuration or adaptive algorithms, the system can remove noise from analog video signals without requiring dedicated separate hardware, thus maintaining a compact control board while improving image quality.
2Adaptability or versatility
If the number of broadcasting channels is increased, then the channel selection capability is improved, but the processing load increases
Solution Approach 1:
The patent applies preliminary action by performing noise removal processing on the video signal before further processing stages. By detecting and removing interference signals early in the processing chain, the system reduces the processing load for subsequent channels and operations. The noise processor analyzes the frequency characteristics of incoming signals and removes interference components proactively, preventing the accumulation of processing complexity as more channels are added.
3Reliability
If frequency band settings are made specific to counter noise, then the noise removal effectiveness is improved, but the adaptability to different geographic areas decreases
Solution Approach 1:
The patent implements dynamic frequency analysis by continuously monitoring the frequency characteristics of the incoming video signal and adapting the noise removal parameters in real-time. Instead of using fixed frequency band settings, the system dynamically identifies interference signal frequencies through spectral analysis and adjusts the filtering parameters accordingly. This allows the noise removal function to adapt to different geographic regions and broadcasting conditions without requiring pre-configured frequency settings, maintaining both effectiveness and versatility.
Data Source
AI summary
The display apparatus includes a video receiver which receives a video signal from an external source; a video processor which processes the video signal received in the video receiver to be displayable on a display unit; and a noise processor which determines frequency position information of an interference signal component from a frequency domain of sync sections extracted from the video signal with regard to the interference signal component mixed in a predetermined frequency band of the video signal and causing noise in a display image displayed on the display unit, and compensates the display image based on the determined frequency position information.