The part of the video signal that contains no picture information. Used for synchronising, timecode, closed captions, etc.
the process of making the trace, or parts of a trace, invisible.
Areas of a picture electronically blanked out, thus preventing the operator from viewing designated areas such as residential house windows.
the process of cutting off the electron beam of a television picture tube, camera tube or cathode ray oscilloscope tube during retrace by applying a rectangular pulse voltage to the grid or cathode during each retrace interval.
The act of cutting a blank.
The turning off of the electron beam that scans the image onto the screen. The interval when the beam completes a scan line and it must return (retrace) back to the left. During this time, the beam must be turned off (horizontal blanking). Similarly, when the last line has been scanned at the bottom of the screen, the beam must return to the upper left ( vertical blanking).
The portion of the composite video signal whose instantaneous amplitude makes the vertical and horizontal retrace invisible.
The brief period in the television scanning process when the electron beam returns from the right to left or from the bottom to top of the screen, rendering the video signal invisible. It is during the blanking interval that closed-captioning and teletext occurs.
A manufacturing operation where the designed scrap is cut/ punched out from the material. This process is usually used in gold plated parts to save gold being plated on the portion of the material that is going to be scrapped.
The cutting of flat metal stock to a rough shape by striking it sharply with a punch while it is supported on a mating die. Punch presses are used as progressive steps to get a finished shape. Die Cutting is similar and used on cardboard and plastic stock.
The operation of turning off the monitor display, or pick-up device, during sync pulses to avoid thin white lines appearing on the picture.
The operation of punching, cutting, or shearing a piece out of stock to a predetermined shape by die cutting the outside shape of a part. Blanking is cutting up a large sheet of stock into smaller pieces suitable for the next operation in stamping, such as drawing and forming. Often this is combined with piercing.
Electron-beam cut-off in a cathode-ray tube during beam retrace.
Strips of metal about 13 inches wide and 1,500 feet long are used to manufacture coins. Each is fed through a blanking press which punches out round discs called blanks.
The part of the video signal that contains no picture information. This is the time that the scanning beam in a TV picture tube is blanked to allow it to track back to the begining without drawing diagonal lines across the screen.
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 process of punching, cutting or shearing predetermined shapes out of stock.
portions of the video signal during which both camera and receiver complete a scan line (horizontal blanking) or field (vertical blanking), and retrace to begin the next scan.
Die cutting of the outside shape of a part.
The process of cutting off the electron beam in a camera pickup device or picture tube during the retrace period. It is a signal that is composed of recurrent pulses at line and field frequencies. It is intended primarily to make the retrace on a pickup device or picture tube invisible.
An ordinary television signal consists of 30 separate still pictures or frames sent every second. They occur so rapidly, the human eye blurs them together to form an illusion of moving pictures. This is the basis for television and motion picture systems. The blanking interval is that portion of the television signal which occurs after one picture frame is sent and before the next one is transmitted. During this period of time special data signals can be sent which will not be picked up on an ordinary television receiver.
The process of cutting metal blanks by a die and punch set in a press, or by sawing or shearing.
The process whereby the beam in a CRT is cut off during the retrace period.
Blanking refers to the process of separating a die cut sheet. Once a sheet has been die cut, the next step in the converting, or finishing process, is to separate the good material (the part you want) from the waste (or trim). The removed die cut piece is called a "blank." See the " What is Blanking?" page for more information.
An ordinary television signal consists of 30 separate still pictures or frames sent every second. These frames occur so rapidly that the human eye blurs them together to form an illusion of moving pictures. This is the basis for television and motion picture systems. The blanking interval is that portion of the television signal which occurs after one picture frame is sent and before the next one is transmitted. During this blanking interval special data packets may be sent which will not be picked up by standard television receivers. VITS (Vertical Interval Timing Signals) are one type of signal that is sent to your television during this blanking segment. This tells your television when to display the next frame sequence.