| Cathode Ray tube (CRT) based TVs and computer monitors require a small amount of time for scanning circuitry to return to the top of the screen after completing scanning of the last line at the bottom. This time is known as the 'Verical Blanking Interval' (VBI) and is made up of non-picture (blank) lines. The following Norpak products are designed to encode & insert, receive & decode, and filter & monitor data in the VBI. |
