Vertical blanking interval. The scan lines in a television signal that do not contain picture information. These lines are present to allow the electron scanning beam to return to the top and are used to contain auxiliary information such as closed captions.
Vertical Blanking Interval. A portion of the television signal that does not contain visual data. In NTSC, the VBI are lines 1 through 21 in each field.
This is the period of time between 'frames' in a video broadcast when information is still being broadcast but when the information is not being displayed on the screen. It contains many types of information such as teletext, color signal analysis etc.
Vertical-Blanking Interval (Of TV signal), U.S. terminology. Otherwise known as field Suppression.
Vertical Blanking Interval. The first 21 lines of a television field in the analog format, normally invisible to the viewer, where closed-caption data and other information are carried.
Vertical Blanking Interval. The first 21 lines of the 525 horizontal line standard television picture. These 21 lines do not contain picture information and can be used to convey ancillary information, such as test signals and/or data.
Vertical Blanking Interval; the VBI is the first 22 lines in each field of a PAL signal (15 lines in an NTSC signal). These lines do not contain any video information, but are used for field synchronization purposes (i.e. indicating start of picture). The VBI is also used for transmission of teletext.
Vertical Blanking Interval. The time period in which a television signal is not visible on the screen because of the vertical retrace (the repositioning to top of screen to start a new scan). Data services can be transmitted using a portion of this signal.
The Vertical Blanking Interval is a portion of the TV signal that carries, instead of picture or sound, such additional information as closed captioning, stock prices and other data. The VBI consists of the first 21 lines of each of the two interlaced fields that make up the TV picture. Line 21 is designated to carry captioning data.
The vertical blanking interval (VBI) is a portion of a television signal that can carry information other than video or audio, such as closed caption text and stock market data.
Vertical Blanking Interval. The period of time between television pictures, which is visible as a black bar when the picture rolls. The VBI contains signals that allow receivers to keep the picture stable and has additional signal capacity that can be used to carry closed captioning information, test, cue and control signals, and other data services.
See Vertical blanking interval.
Vertical Blanking Interval, comprising lines at the start of a TV signal before the picture area. These lines can contain Teletext, Closed Caption (NTSC only) and other information.
Vertical Blanking Interval. Field blanking period. Period between active picture fields.
Vertical Blanking Interval The blank area out of sight at the top and bottom of a television picture that allows the raster gun to reset. The space created is often used for Teletext and other services.
Vertical blanking interval. In broadcast video, a small period of time that elapses between video frames, during which a display device refreshes its display for the next frame.
Vertical Blanking Interval. The top of the video, unseen on most TVs, which contains captioning on its 21st line. It can contain other data streams as well.
VBLANK interrupt. A VBI is an interrupt that occurs during the VBLANK interval, causing the computer to jump to a user-specified location to process a short user-written routine during the VBLANK process.
Vertical Blanking Interval. Part of a TV signal which is left blank, allowing time for the electron gun to move from the bottom of the screen to the top as it scans images. These blank scan lines are now used for broadcasting closed-captioning and teletext signals.