4 ms·
Maybe I’m missing something, but isn’t that how JPEG works? It preprocesses the DCT blocks to throw away data (or add noise if you want to read it that way). By
by colejohnson66 4y ago
Maybe I’m missing something, but isn’t that how JPEG works? It preprocesses the DCT blocks to throw away data (or add noise if you want to read it that way). By doing so, it lends itself to shorter encoding of the data (compression of a sort).
- phkahler 4y agoYep, and jpg is pretty much the bar you have to beat for any lossy compression. It's fast and low power by today's standards, with excellent quality for the compression ratio it achieves. As someone said back in the day, it was alien technology from the future - or something like that.
- Sesse__ 4y agoThe big difference is that this preprocessing doesn't require a reversal step. JPEG's DCT requires an IDCT (and chroma conversion etc.), which the client needs to understnad and know about, while this merely introduces controlled noise that happens to please LZ compressors.