The New Compression Paradigm
JPEG-2000 uses an embedded, progressively encoded bit stream for the compressed file. This enables the following kinds of scalability:
- Progressive by accuracy (pixel SNR).
- Progressive by spatial resolution (hierarchical).
- Progressive by visual weighting or region-of-interest (ROI).
Markers are placed in compressed bit stream to give the decompressor many choices in decoding the file:
- Any desired bit rate (up to the rate used in compression).
- Any resolution layer (up to full resolution).
- Can choose to decode only certain blocks or tiles in the image (Region-of-Interest decoding).
Simplified conceptual framework for implementors.
- No plethora of “profiles” or “modes” in Part 1 (Baseline)!