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I understand that wavelet is amazing, but am a little sceptical about it being used outside of a few specialist areas. The general trend seems to be towards us

by 7952 14y ago

I understand that wavelet is amazing, but am a little sceptical about it being used outside of a few specialist areas. The general trend seems to be towards using increased storage and power to avoid compression (raw), rather than making files smaller.

KaiserPro 14y ago
The thing that replaced 35mm with a digital format is DCP. Basically its Jpeg2000 in disguise. The problem with uncompressed formats at high resolution (like cinema 4k, and its smaller "UHD" cousin.) is that they eats bandwidth. Full res 4k images with basic RLE is 50megs. Thats 1.2 gigabyte a second. You're lucky to get that out of 10gig Ethernet. Uncompressed anything is pretty much out of the reach of most consumers. iTunes, netflix, over the air, cable is all either MPEG2 or h.264
- 7952 14y ago
  But surely nothing has really changed over the last 15 years. Processing power, storage, and bandwidth all get larger, but so do the images. Wavelets must be a great technology if you want to fit a HD video on a CD and play it with an expensive machine. I am not arguing against compression. But you have to admit that Jpeg2000 has been the next big thing for a long time. Surely it is cheaper to just use h264 and have more storage?
  - KaiserPro 14y ago
    Depends on the application, In broadcasting for example bandwidth is painfully expensive, hence the shift from MPEG2 to h.264 for consumers (although in the US its much more complicated as everyone seems to recompress everything badly on TV. Its like watch a pirated copy.) It just takes a long time to get from approval to acceptance. The other problem with JPEG2000 is that its not really a motion codec, so it doesn't degrade well over lossy links without special sauce. All of which is non standard.
    - 7952 14y ago
      I think this thread proves a point about compression. That it is about balancing different requirements rather than absolute performance in any one measure.

by 7952 14y ago

KaiserPro 14y ago

The thing that replaced 35mm with a digital format is DCP. Basically its Jpeg2000 in disguise. The problem with uncompressed formats at high resolution (like cinema 4k, and its smaller "UHD" cousin.) is that they eats bandwidth. Full res 4k images with basic RLE is 50megs. Thats 1.2 gigabyte a second. You're lucky to get that out of 10gig Ethernet. Uncompressed anything is pretty much out of the reach of most consumers. iTunes, netflix, over the air, cable is all either MPEG2 or h.264

7952 14y ago
But surely nothing has really changed over the last 15 years. Processing power, storage, and bandwidth all get larger, but so do the images. Wavelets must be a great technology if you want to fit a HD video on a CD and play it with an expensive machine. I am not arguing against compression. But you have to admit that Jpeg2000 has been the next big thing for a long time. Surely it is cheaper to just use h264 and have more storage?
- KaiserPro 14y ago
  Depends on the application, In broadcasting for example bandwidth is painfully expensive, hence the shift from MPEG2 to h.264 for consumers (although in the US its much more complicated as everyone seems to recompress everything badly on TV. Its like watch a pirated copy.) It just takes a long time to get from approval to acceptance. The other problem with JPEG2000 is that its not really a motion codec, so it doesn't degrade well over lossy links without special sauce. All of which is non standard.
  - 7952 14y ago
    I think this thread proves a point about compression. That it is about balancing different requirements rather than absolute performance in any one measure.