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Other Lossy Codecs / Re: TSAC: Very Low Bitrate Audio Compression
Last post by rc55 -I had an idea, but I'm unsure if it's a viable solution to improve things further. What if we use a lossy codec with a proven track record to compress audio files, then compare the result with the original and extract the differences? We could then encode these differences using a codec like this to achieve a sort of lossless quality while reducing the required resource requirements and compression time associated with computationally heavy codecs like this one. I'm curious to know if this hybrid approach could lead to a versatile solution that offers the best of both worlds.
I don't think this would really benefit as ultimately you are creating a lossy file so the differencing / difference encoding pass doesn't make sense. I suppose stacking different technologies is a curious one, reminds me of SBR or switching between CELT/SILK in Opus depending on content.
Perhaps blending codecs would be an interesting idea - you could have 0-16khz covered by Opus or similar and anything above that covered by a trained NN model for less sensitive frequency ranges, much like how TSAC works. I'm not a domain expert on that though.