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- Number of terms: 20560
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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
An image or pattern appearing so regularly on the screen of a picture tube that it ages the phosphors and remains as a ghost image even when other images are supposed to be shown. On computer terminals, the areas occupied by characters are frequently burned, particularly in the upper left corner. In television transmission centers, colour bars are sometimes burned onto monitors. There is some concern that some ATV schemes will burn a widescreen pattern on ordinary TV sets due to increased vertical blanking or will burn a non-widescreen pattern on ATV sets due to reception of non-ATV signals. In production, refers to long-term or permanent image retention of camera pickup tubes when subjected to excessive highlights.
Industry:Entertainment
Compacting of a digital signal, particularly when a high compression ratio is used, may result in small errors in the decompressed signal. These errors are known as “artifacts,” or unwanted defects.
The artefacts may resemble noise (or edge “busyness”) or may cause parts of the picture, particularly fast moving portions, to be displayed with the movement distorted or missing.
Industry:Entertainment
Same as the luminance signal (Y). This signal carries information about the amount of light at each point in the image.
Industry:Entertainment
A method of post production that records and processes video completely in the component digital domain.
Analog sources are converted only once to the component digital format and then remain in that format throughout the post production process.
Industry:Entertainment
A time code that is displayed on the monitor along with the video it pertains to. Burn In Time Code can either be Vertical Interval Time Code (VITC) or Longitudinal Time Code (LTC).
Industry:Entertainment
Ratio of input bit rate to output (compressed) bit rate. Like Compression Ratio.
Industry:Entertainment
Another name for the vertical synchronising pulses in the centre of the vertical interval. These pulses are long enough to be distinguished from all others and are the part of the signal actually detected by vertical sync separators.
Industry:Entertainment
Refers to ensuring that each of the three signals that make up the CAV information are amplified equally. Unequal amplification will cause picture lightness or colour distortions.
Industry:Entertainment
An image which persists in a fixed position in the output signal of a camera tube after the camera has been turned to a different scene.
Industry:Entertainment
A value that indicates by what factor an image file has been reduced after compression. If a 1 MB image file is compressed to 500 KB, the compression ratio would be a factor of 2. The higher the ratio the greater the compression.
Industry:Entertainment
