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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.
A defect of a photographic film consisting of unflatness in a plane cutting across the width of the film. Curl may result from improper drying conditions, and the direction and amount of curl may vary with the humidity of the air to which the film is exposed.
Industry:Entertainment
a) A consumer digital audio recording and playback system developed by Sony, with a signal quality capability surpassing that of the CD. b) A magnetic tape from which you can read and to which you can copy audio and digital information.
Industry:Entertainment
The aggregate of fine details available on-screen. The higher the image definition, the greater the number of details that can be discerned.
During video recording and subsequent playback, several factors can conspire to cause a loss of definition. Among these are the limited frequency response of magnetic tapes and signal losses associated with electronic circuitry employed in the recording process. These losses occur because fine details appear in the highest frequency region of a video signal and this portion is usually the first casualty of signal degradation. Each additional generation of a videotape results in fewer and fewer fine details as losses are accumulated.
Industry:Entertainment
When an electronic signal travels through electronic circuitry or even through long coaxial cable runs, delay problems may occur. This is manifested as a displaced image and special electronic circuitry is needed to correct it.
Industry:Entertainment
A frame containing only the data that has changed since the last frame. Delta frames are an efficient means of compressing image data. Compare Key Frame.
Industry:Entertainment
In video, distortion usually refers to changes in the luminance or chrominance portions of a signal. It may contort the picture and produce improper contrast, faulty luminance levels, twisted images, erroneous colors, and snow. In audio, distortion refers to any undesired changes in the waveform of a signal caused by the introduction of spurious elements. The most common audio distortions are harmonic distortion, intermodulation distortion, crossover distortion, transient distortion, and phase distortion.
Industry:Entertainment
System of modifying the frame counting sequence (dropping two frames every minute except on every tenth minute) to allow time code to match a real-time clock.
Industry:Entertainment
An effect available in some special effects generators and video mixers in which one video signal is keyed on top of another video signal. The lightest portions of the DSK signal replace the source video leaving the dark areas showing the original video image.
Optionally, the DSK signal can be inverted so the dark portions are keyed rather than the lightest portions allowing a solid color to be added to the keyed portions. The DSK input is most commonly a video camera or character generator. The DSK signal must be genlocked to the other signals.
Industry:Entertainment
A multimedia system marketed by Intel.
DVI is not just an image-compression scheme, but includes everything that is necessary to implement a multimedia playback station including chips, boards, and software. DVI technology brings television to the microcomputer.
DVI’s concept is simple: information is digitized and stored on a random- access device such as a hard disk or a CD-ROM, and is accessed by a computer. DVI requires extensive compression and real-time decompression of images. Until recently this capability was missing. DVI enables new applications. For example, a DVI CD-ROM disk on twentieth-century artists might consist of 20 minutes of motion video; 1,000 high-res still images, each with a minute of audio; and 50,000 pages of text. DVI uses the YUV system, which is also used by the European PAL color television system.
The Y channel encodes luminance and the U and V channels encode chrominance. For DVI, we subsample 4-to-1 both vertically and horizontally in U and V, so that each of these components requires only 1/16 the information of the Y component. This provides a compression from the 24-bit RGB space of the original to 9-bit YUV space. The DVI concept originated in 1983 in the inventive environment of the David Sarnoff Research Center in Princeton, New Jersey, then also known as RCA Laboratories. The ongoing research and development of television since the early days of the Laboratories was extending into the digital domain, with work on digital tuners, and digital image processing algorithms that could be reduced to cost-effective hardware for mass-market consumer television.
Industry:Entertainment
Another manifestation of adjacency effects. A series of photographic line images of various widths, all exposed with equal intensities. As the lines become narrower, the concentration of reaction products is reduced, and thus the narrower lines develop to a higher density than do the wider lines. This effect would be expected to continue with successive narrowing until one reached the width of the spread function of the system, including film, used to expose the line. Beyond this point, the effects of the spread function of the system dominate, and light scattering decreases the true light exposure in the film, but the size of the image is not smaller than the spread function of the system.
Industry:Entertainment
