Frequency reconstruction module is where the energy envelope of additional high-frequency signal, the original signal, and the cuf-off frequency are merged.
The existing algorithm of missing frequency restoration is based on the statistical analysis collected by Sound Genetics. The results reveal that the energy distribution at high frequencies within the entire set of possible sound genotypes posses a similar harmony structure. The algorithm also takes into account specifics of how signal is processed by the human brain. This process is performed by Sound Envelope Controller.
The engine designers have included the ability for user to affect how the reconstructed wave is formed. These parameters are part of the high frequency reconstruction function. The parameters that can be manipulated are:
Frequency Cutoff value
- Energy diffusion value at level below frequency cutoff
- Bin energy at cutoff frequency level
- Envelope slope at cutoff frequency level: slope (dB/kHz)
The actual sound envelope is calculated by an adaptive determination of sound genome formula. The parameters of that formula are based on the incoming signal character set with predefined limited ranges. Those predefined ranges, and the parameters specified above, massage and form the finalized sound wave envelope that produce the reconstructed sound wave. This approach delivers stability and robustness since the suggested envelope and parameters are based on its relation to a pre-defined genetic sound class specified in the analysis phase.
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Download full copy of Sound Genome Theory white paper in pdf format. 