Artificial Ambience Filter With Transient Reduction for Fewer Echoes
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Solution Overview
Problem
Existing artificial reverberation technologies require significant computational resources and often result in unpleasant discrete echoes due to high reflection density, making it challenging to create a credible ambience effect without increasing computational effort.
Innovation Solution
A system combining a transient reduction module and a reverberation filter to reduce transients in audio signals, allowing for a smaller number of filter taps while minimizing discrete echoes, thereby enhancing the ambience effect efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional artificial reverberation filters are used to simulate large spaces, then the ambience effect is enhanced, but computational resources increase significantly and discrete echoes appear
Solution Approach 1:
The patent extracts and removes transient components from the audio signal before applying reverberation. By separating the transient reduction function from the reverberation process, the system eliminates the source of discrete echoes while maintaining the desired ambience effect, thereby reducing computational complexity without sacrificing quality
Solution Approach 2:
The patent segments the audio processing into distinct stages: transient detection, transient reduction, and reverberation application. This segmentation allows each module to be optimized independently, reducing the overall computational burden while maintaining reliable ambience simulation
2Reliability
If high reflection density is used in reverberation filters, then ambience quality improves, but discrete echoes increase and computational effort increases
Solution Approach 1:
The patent applies preliminary anti-action by detecting transients before they enter the reverberation process and applying reduction measures in advance. This prevents the formation of discrete echoes at their source, allowing high reflection density to be used without the harmful side effects
Solution Approach 2:
The patent converts the harmful transients that cause discrete echoes into a useful detection signal. By detecting transient occurrences and using this information to guide the reverberation processing, the system transforms a problem into a solution, enabling high-quality ambience without echoes
Data Source
AI summary
A circuit, method, and system for producing artificial ambience effect for an input audio signal, mono, stereo, or surround. The ambience effect enhances artificial reverberation, replaces artificial reverberation, or synthesizes extra audio channels, such as surround channels. The circuit may include a transient reduction module and a reverberation filter. The transient reduction module may be adapted to reduce transients in an input audio signal of one or more channels. The reverberation filter maybe adapted to receive a transient-reduced signal of one or more channels corresponding to the transient-reduced signal.