Glossary

1.2.22 Glossary - V

Vertical Ancillary Data. To know more about Vertical Ancillary Data (VANC), see ANC.

Vertical Blanking Interval. Vertical Blanking Interval (VBI) is a portion of the television signal that does not contain visual data. The VBI is used to transport data, such as VITC, captions, Teletext, color signal analysis, and video. In NTSC, the VBI consists of each field's first 21 field lines (10 to 21 for data transport). Meanwhile, PAL comprises the first 25 lines (1 to 16 for data transport). With Etere, users can encode and decode data from VBI, which can be NTSC and PAL sources. 

Video Assist. In broadcast automation, the Video Assist mode is related to the manual intervention of a human operator. The Video Assist mode usually runs when a broadcast automation emergency occurs, and it’s impossible to continue with the automatic transmission. Etere software provides the station's on-air personnel with a Video Assist tool to help users send four different schedules on air. These schedules are supported by media files, which are automatically stored in an Etere MTX video server.

Video compression. Video compression is a method that is used to compress a video stream. The most common coding methods are I-frame and long-GOP. Video compression is also known as Video Coding. 

Video formats. A video format is the main broadcast format most countries use for transmitting television signals. The standard video formats are NTSC, PAL, and SECAM. Etere fully supports most major video formats. The video format is also known as video standards. 

Virtual Local Area Network. Virtual Local Area Network (VLAN) is a common function of higher-end switches that segregates ports on the switch into separate broadcast domains.