Analog Broadcast Receiver Interference Removal
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Solution Overview
Problem
Conventional broadcast receiving apparatuses are unable to correct noise caused by interference signals in analog broadcast signals, which are often received along with the desired signal due to adjacent channels, leading to poor image quality on screens.
Innovation Solution
A broadcast receiving apparatus comprising a signal receiver, sync signal detector, interference signal detector, and interference signal remover, which converts analog signals to digital, detects sync signals, and uses digital comb filters, channel equalizers, or Fast Fourier Transform (FFT) to identify and remove interference signals based on their patterns, ensuring only the desired signal is displayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional broadcast receiving apparatus receives analog broadcast signals, then the desired signal can be received, but interference signals from adjacent channels cause noise on the screen
Solution Approach 1:
The patent extracts and removes the interference signal component from the received broadcast signal by detecting sync signals, identifying interference patterns, and selectively eliminating only the harmful interference components while preserving the desired signal content
Solution Approach 2:
The patent uses sync signals as an intermediary to detect and identify interference signals. By analyzing the sync signal characteristics and comparing them against reference patterns, the system can distinguish between desired and interference signals, then apply appropriate filtering to remove only the harmful components
2Reliability
If digital signal processing is applied to remove interference, then noise correction is achieved, but device complexity increases
Solution Approach 1:
The patent performs preliminary detection and analysis of sync signals to identify interference patterns before the main signal processing occurs. By pre-identifying the presence and characteristics of interference signals, the system can apply targeted filtering operations rather than complex general-purpose noise reduction algorithms
Solution Approach 2:
The patent changes the processing approach by working in the time domain using sync signal patterns rather than transforming to frequency domain. This parameter change in the processing domain simplifies the interference detection and removal operations while maintaining effectiveness
Data Source
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AI summary
A broadcast receiving apparatus and method are provided, the appartus including a signal receiver which receives an analog broadcast signal in a radio frequency (RF) band; a sync signal detector which detects a sync signal area of the received broadcast signal; an interference signal detector which compares the sync signal area of the broadcast signal with a predetermined reference signal and detects an interference signal component; and an interference signal remover which removes the interference signal component from the broadcast signal based on the interference signal component detected from the sync signal area.