Time code

Time code is an electronic signal which is recorded to identify each frame on a videotape.  Time code is displayed as four pairs of numbers (separated by dots) which signify:

so 09:10:32:22 means either that tape number 9 is stopped 10 minutes, 32 seconds and 22 frames after the recording started or that we recorded this piece of material just after ten past nine in the morning - 09 hours:10 minutes:32 seconds:22 frames.