I just read in a article about 2d audio convolution that the signals
need to be transformed to a 2d rastogram before the actual FFT transformation…
According to the writer:
“Rasterisation is the process by which a 1D audio data array
is converted to a 2D matrix using raster scanning.
The resulting representation can be displayed as a grayscale image called a rastogram,
where the spatial dimensions represent time at two different
resolutions and sample amplitude gives the pixel intensity”
Can anyone confirm this please?
Any hints on where to look for information?
Here is the link to the article in case you wanna have a better look: