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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 device that changes RGB or DAV into NTSE using some form or forms of pre-filtering to reduce or eliminate NTSC artifacts.
Some advanced encoders also offer image enhancement, gamma correction, and the like.
Industry:Entertainment
A new photographic system conceived by Kodak and developed jointly with Canon, Fuji, Minolta, and Nikon. The APS was launched in April 1996. APS also represents the file format used to store data on the new film's magnetic coating.
Industry:Entertainment
The US-based organisation that is defining the high definition television standard for the United States. A sort of NTSE for ATV. It is comprised of three technology groups and a number of smaller committees. T1 Group is studying receiver- compatible improved NTSC. T2 Group is studying non-receiver-compatible 525 scanning line production, distribution, and display systems. T3 Group is studying HDTV.
Industry:Entertainment
Used in mixing boards to override the normal monitoring path in order to monitor a specific signal at a predefined point in the mixer. Unlike PFL, the AFL signal definition is taken after the fader of a channel or group buss such that the level of the fader will affect the level heard in the AFL monitor circuit. AFL is sometimes also taken after the pan pot which also allows the engineer to monitor the signal with the pan position as it is in the mix. AFL is a handy way to monitor a small group of related instruments by themselves with all of their eq, level, and pan information reproduced as it is in the overall mix. An AFL circuit that includes pan information is often called “solo” or “solo in place” depending upon who builds the mixer.
Industry:Entertainment
MIDI data sent when pressure is applied to a keyboard after the key has been struck, and while it is being held down or sustained.
Aftertouch is often routed to control vibrato, volume, and other parameters.
There are two types: the most common is Channel Aftertouch which looks at the keys being held, and transmits only the highest aftertouch value among them. Less common is Polyphonic Aftertouch, which allows each key being held to transmit a separate, independent aftertouch value. While polyphonic aftertouch can be extremely expressive, it can also be difficult for the unskilled to control, and can result in the transmission of a great deal of unnecessary MIDI data, eating bandwidth and slowing MIDI response time.
Industry:Entertainment
The ability of a switcher console to indicate to an operator which video sources and keys are on-air at any given time. Ampex switchers have “true” air tally in that they sense actual presence of sources.
Industry:Entertainment
A) A set of rules or processes for solving a problem in a finite number of steps. In audio, video, and data coding, the step-by-step procedure (often including repetition) which provides suitable compression and/or encryption for the specific application. When used for compression, this mathematical process results in a significant reduction in the number of bits required for transmission and may be either lossless or lossy.
b) Step-by-step procedure for the solution to a problem. First the problem is stated and then an algorithm is devised for its solution.
Industry:Entertainment
Something other that what it appears to be. Stairsteps on what should be a smooth diagonal line are an example of spatial alias.
Wagon wheels appearing to move backwards are an example of temporal alias. Aliases are caused by sampling and can be reduced or eliminated by pre-filtering, which can appear to be a blurring effect. Defects in the picture typically caused by insufficient sampling (violation of the Nyquist sampling rate) in the analog-to-digital conversion process or poor filtering of digital video. Defects are typically seen as jaggies on diagonal lines and twinkling or brightening in picture detail. Examples are: Temporal Aliasing – such as rotating waggon wheel spokes appearing to rotate in the reverse direction. Raster Scan Aliasing – such as sparkling or pulsing effects in sharp horizontal lines. Stair-Stepping – stepped or jagged edges in diagonal lines or the diagonal parts of a letter.
Industry:Entertainment
Most commonly, Head Alignment, but also used to describe the process of adjusting a recorder’s Bias and equalisation for optimum results from a specific tape.
Industry:Entertainment
The alpha channel is used to specify an alpha value for each colour pixel. The alpha value is used to control the blending, on a pixel-by-pixel basis, of two images. Alpha typically has a normalised value of 0 to 1. In a computer environment, the alpha values can be stored in additional bit planes of frame-buffer memory. When you hear about 32-bit frame buffers, what this really means is that there are 24 bits of color, 8 each for red, green, and blue, along with an 8-bit alpha channel. Also see Alpha Mix.
: new pixel = (alpha) (pixel A color) + 1 – alpha (pixel B color)
Industry:Entertainment
