Hi, asdcplib author here (mentioned in the article.) Excellent writeup of DCP and related tech. FYI the colorspace of an SDR DCP MXF file is X'Y'Z' with gamma 2.6 (see SMPTE 428-1.) Other MXF formats (i.e., not cinema) use a wide variety of colorspaces. Despite the huge range of XYZ, DCP image files are usually constrained to code values that fall within P3 (again, SDR.) The HDR applications are more interesting.
Upon reading the comments: • DCP is a B2B format. DCP usage is licensed by contract, not EULA. Please keep these important differences in mind when commenting on DRM. • Decrypt, decode, color processing, watermark occurs in FPGA. If you think that sounds hard, remember that all of this tech was originally deployed 20 years ago. Moore's law has made our lives much easier since! • Frame-by-frame encipherment, rather than whole stream, better supports random access and the famous tobacco intermissions popular in the EU.