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Digital cinema uses a kind of Motion-JPEG2000. The encoding of the coefficients is so convoluted that cinema projector systems require custom hardware to do dec
by Findecanor 5y ago
Digital cinema uses a kind of Motion-JPEG2000.
The encoding of the coefficients is so convoluted that cinema projector systems require custom hardware to do decoding in 2K at full speed.
The only software algorithm that could decode it at relative speed was patented by someone involved with the format: otherwise, software decoding is very slow compared to other formats.
JPEG2000 is also sometimes used to encode images embedded in PDFs.
- Isthatablackgsd 5y ago> JPEG2000 is also sometimes used to encode images embedded in PDFs. Interesting. I thought PDF normally convert the format into .jbig2 for embedding into the PDF itself.
- cwt137 5y agoPDF doesn't encode something. PDF supports a few data formats. They call them "filters"; for example CCITT Fax, JBIG2, DCT, RLE, etc. Its up to the PDF creation program to pick the best data format for the image it would like to put into the PDF.