The MRC image data consist of a series of: markers; parameters; data that specify the image coder,image size, bit resolution and spatial resolution; coded image data. The conventions of Annex B/T.81 are used broadly here. The JPEG registration body, per ITU-T Rec. T.86, has been used to register the marker code, APP13, classified as an application marker.
ITU-T T.44 NOTE-2005 Referenced Document
ITU-T T.45 Run-Length Colour Encoding Series T: Terminals for Telematic Services Study Group 8; 11 pp
ITU-T T.81 Information Technology - Digital Compression and Coding of Continuous-Tone Still Images - Requirements and Guidelines - Terminal Equipment and Protocols for Telematic Services Study Group VIII; 186 pp
ITU-T T.82 Information Technology - Coded Representation of Picture and Audio Information - Progressive Bi-Level Image Compression - Terminal Equipment and Protocols for Telematic Services