The area in a video signal that falls between frames. It is often used to accommodate data such as synchronizing information.
The Blanking Interval is the length of time (in milliseconds) after an acoustic signal has been received in which the VEMCO receiver will ignore any subsequent signals. This is to eliminate the reception of echoes by the receiver.
The blanking interval occurs at the end of a frame. Video information is absent during the blanking interval. The interval occurs when the CRT electron gun scanner goes from the bottom right corner of the screen to the beginning of the next field in the top left corner.
The retrace interval of 10.5 microseconds in which the effect of the electron beam is extinguished so that it can return from the right to the left side of the screen. Also the 1.3 millisecond interval in which the effect of the electronic beam is extinguished so that it can move from the bottom of one field to start scanning the top of the next field.
The period of time when a television monitor is "blanked" while the electron beam retraces from right to left or bottom to top. In a baseband video signal, the intervals between active video lines and between the last active line in a field and the first active line in the next. Ideally, a video switcher would sense when a blanking period occurs and would switch the video signal during this time. This prevents any visually unpleasant video effects on a monitor. This requires the video switcher to actively monitor each of the user's video sources.
The portion of a TV signal between when each frame is sent. Not viewable by the human eye.
The horizontal blanking interval is the time between the end of one scanning line and the beginning of the next. The vertical blanking interval is the time between the end of one video field* and the beginning of the next. Blanking occurs when a monitor's electron beam is positioned to start a new line or a new field. The blanking interval is used to instantaneously reduce the beam's amplitude so that the return trace is invisible. (See VERTICAL INTERVAL SWITCHING)
There are horizontal and vertical blanking intervals. Horizontal blanking interval is the time period allocated for retrace of the signal from the right edge of the display back to the left edge to start another scan line. Vertical blanking interval is the time period allocated for retrace of the signal from the bottom back to the top to start another field or frame. Synchronizing signals occupy a portion of the blanking interval.
