Broadcast Receiver Adaptive Bandwidth Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing broadcast receivers face challenges in effectively regulating the bandwidth of digitized broadcast signals, leading to suboptimal signal quality due to interference and differing content types like speech and music, which require distinct filtering bandwidths for proper reproduction.
Innovation Solution
A broadcast receiver and method that incorporate a bandwidth filter unit with variable filtering bandwidth, a signal content analysis unit to differentiate between speech and music content using average pitch density and relative tonal energy density, and a bandwidth regulation unit to adapt filtering based on signal quality and content, ensuring optimal filtering settings for improved signal quality and interference resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed filtering bandwidth is used for digitized broadcast signals, then the device complexity is reduced, but the signal quality deteriorates due to interference and differing content types
Solution Approach 1:
The patent implements dynamic bandwidth filtering by making the filtering bandwidth variable rather than fixed. The bandwidth filter unit adapts its filtering characteristics based on real-time analysis of signal content and quality, allowing the system to optimize performance for different broadcast conditions while maintaining manageable complexity through automated control.
Solution Approach 2:
The system employs feedback mechanisms where the signal content analysis unit and signal quality analysis unit continuously monitor the broadcast signal characteristics. This information feeds back to the bandwidth filter unit to dynamically adjust the filtering bandwidth, creating a closed-loop control system that maintains high signal quality without requiring complex manual intervention.
2Reliability
If a wide filtering bandwidth is applied to all signals, then all signal content types are preserved, but interference impact increases reducing signal quality
Solution Approach 1:
The patent applies local quality by tailoring the filtering bandwidth to the specific characteristics of each signal segment. Rather than using a uniform wide bandwidth for all signals, the system analyzes signal content (speech vs. music) and quality parameters to apply appropriate filtering bandwidth locally, thereby preserving necessary signal components while minimizing interference impact for each specific case.
3Object-affected harmful factors
If a narrow filtering bandwidth is used, then interference is reduced improving signal quality, but signal content fidelity deteriorates especially for music
Solution Approach 1:
The system dynamically changes the filtering bandwidth parameter based on real-time signal analysis. For speech content, a narrower bandwidth suffices to reduce interference, while for music content, the bandwidth is widened to preserve fidelity. This parameter adaptation allows the system to optimize the trade-off between interference reduction and information preservation for different signal types.
4Reliability
If adaptive bandwidth filtering is implemented, then signal quality is optimized for different content types, but the device complexity increases due to additional analysis units
Solution Approach 1:
The patent achieves universality by designing a multi-functional processing chain where the signal content analysis unit and signal quality analysis unit serve multiple purposes. These units not only determine filtering bandwidth but also provide insights for other signal processing tasks, thereby distributing the complexity across shared functional blocks rather than requiring dedicated complex subsystems.
Data Source
AI summary
A broadcast receiver for processing of a broadcast signal, and a method for processing a broadcast signal by a broadcast receiver. The broadcast receiver includes: a receiver unit that is set up to receive the broadcast signal and convert the received broadcast signal into a digital data signal; a bandwidth filter unit that is set up to filter the data signal with a variable filtering bandwidth; a demodulation unit that is set up to demodulate the filtered data signal; a signal content analysis unit that is set up to determine a signal content of the demodulated data signal; a signal quality analysis unit that is set up to determine a signal quality of the data signal; and a bandwidth regulation unit that is set up to regulate the filtering bandwidth depending on the signal content and the signal quality.