LOG-1864 is product for inserting active format description (AFD) data into an HD/SD-SDI video signal. LOG-1864 automatically detects either SD-SDI or HD-SDI input and transmits a re-clocked signal out through two SDI outputs. AFD is a system of codes used to tell DTV receivers, up/down converters, and other professional video equipment, how the video signal is to be displayed, especially if the aspect ratio has changed. AFD in video production is a versatile tool that eases workflow and preserves image quality. Properly managing AFD information is in demand for state-of-the-art digital work-flows. As video productions migrate to storing all their material in HD only and converting to SD as necessary for final transmission, the 1864 offers a simple and reliable solution for adding in AFD for the implementation of the up/down conversion process. The video signal format can be a 270Mb/s SD or 1.5 and 3Gb/s HD video stream. There is automatic detection of most SD and HD video standards. The signal presence and format are indicated on the display. The AFD data is inserted as vertical ancillary data on video lines 8-21, selected by the user. 4 modes of operation includes detect, insert, delete and auto. Auto is used for inserting AFD, only if there is no AFD detected. Detect mode will display the AFD already in the stream. Settings are saved in flash for easy configuration. The unit also regenerates the payload identifier (352M) for all outputs.