Event Broadcast Audio Noise Selection for Real-Time Sound Control
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Solution Overview
Problem
Current audio processing technologies fail to distinguish between desirable and undesirable background noise during events, leading to interference in broadcasting, as they lack intelligence to differentiate between different acoustic frequencies and are slow in achieving real-time noise cancellation.
Innovation Solution
An apparatus comprising a detector-analyzer and a controller that uses preset threshold values to select and modify noise signals, combining them with voice signals in real-time, utilizing multiple microphones and a database of pre-recorded noises to fill frequency bands and adjust power levels, ensuring only acceptable background noise is broadcast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If standard noise cancellation is used to reduce background noise, then noise reduction is achieved, but it cannot distinguish between good and bad noise
Solution Approach 1:
The patent segments the background noise into multiple frequency bands using a filter bank, allowing different processing for different frequency ranges. This enables the system to identify and preserve desirable noise frequencies while canceling unwanted ones, resolving the contradiction between noise reduction and information preservation.
Solution Approach 2:
The patent applies different processing qualities to different parts of the noise spectrum. By analyzing characteristics of noise in specific frequency bands and applying selective cancellation or preservation based on local conditions, the system maintains good noise while removing bad noise, addressing the inability of standard cancellation to distinguish between them.
2Object-affected harmful factors
If standard noise cancellation algorithms are used, then noise reduction is achieved, but real-time performance is not met due to slow processing
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing impulse responses for multiple filter bands. During real-time operation, the system only needs to combine pre-computed filters with current noise estimates, significantly reducing processing time and enabling real-time performance while maintaining effective noise cancellation.
Solution Approach 2:
The patent implements dynamic adaptation by continuously updating noise estimates and adjusting filter coefficients in real-time based on changing acoustic conditions. This dynamic approach allows the system to maintain optimal noise cancellation performance while meeting real-time processing requirements through efficient incremental updates.
Data Source
AI summary
An signal processing apparatus, system and software product for audio modification/substitution of a background noise generated during an event including, but not be limited to, substituting or partially substituting a noise signal from one or more microphones by a pre-recorded noise, and/or selecting one or more noise signals from a plurality of microphones for further processing in real-time or near real-time broadcasting.