Hey Mathy friends. The thing about multiplication in frequency domain being convolution in time domain extends to other funcs and @BartWronsk was saying it might be all orthogonal basis projections that can do this. Trying with decimal vs binary i'm getting something odd. (1/N)
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i know the convolution theorem, but what's LTTP?
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Had to dig deep to remember that it’s “Late To The Party” in some circles, knew I had seen it before.
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This is my recollection as well. I find it unhelpful that we call things convolutions when they aren’t or are only under certain conditions I.e. the FFT can only implement convolution with appropriate zero-padding - otherwise it more generally implements “circular convolution”.
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From memory this book https://www.bookdepository.com/Signal-Processing-with-Lapped-Transforms-Henrique-S-Malvar/9780890064672 … Goes into detail about implementing various orthogonal transforms (dct, dft, dht, etc) and makes statements on what ones can be used to implement convolutions, what the conditions are, and why you probably should stick with a dft :)
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I would think any locally supported basis wouldn’t have this property, it probably ties into shift (rotation) invariance of a basis
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Hrm ok, interesting
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