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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 television transmission channel immediately adjacent to an existing channel. For example, channel 3 is adjacent to channels 2 and 4. There are three exceptions to what might otherwise be considered adjacent channels: there is a small gap between channels 4 and 5, there is a large gap between channels 6 and 7, and there is an enormous gap between channels 13 and 14. Adjacent channels figure into ATV in two ways. a) First, it is currently illegal to broadcast on adjacent channels in a single location. Some ATV proponents feel that augmentation channels might someday be allowed to be placed in adjacent channels. If half-size (3 MHz) or smaller augmentation channels are used, all current broadcasters could then be allowed an augmentation channel. Some proponents feel the use of a low-power digital augmentation channel will allow adjacent channels to be used without interference. b) Second, some ATV proposals require that the augmentation channel be adjacent to the transmission channel or require a larger than normal transmission channel, thus occupying a channel and one of its adjacent channels.
Industry:Entertainment
This term refers to the kind of dimensionality (i.e., 2D, 3D) that can be created using multiplane animation.
Since a layer in such animation can lie in front of one cel (or plane), or in back of another layer, the resulting effect is of a three dimensional world. This is a limited 3D world, however, because the layers are fixed in relation to each other. For this reason, multiplane animation is referred to as 2-1/2 dimensions. It is a very useful technique, however, even for computer graphics, because by ordering the layers in the way a painter does, you can save the computer the need to compare objects that are in different layers (that is, compare them for purposes of hidden surface removal).
Industry:Entertainment
International standard for motion picture film shooting and projection, though film shot for television in 625 scanningline countries is usually shot at 25 frames per second (even if not, it is transferred to television at 25 frames per second). There are moves afoot in the U.S. to increase the film frame rate to 30 for improved temporal resolution.
The ImageVision HDEP system and other electronic cinematography systems use 24 frames per second. RCA once proposed an electronic cinematography system with 2625 scanning lines (2475 active), a 2:33:1 aspect ratio, and a frame rate of 23.976023 frames/sec.
Industry:Entertainment
Techniques for ATV transmission developed by the DSRC, with support initially from NBC and RCA/GE Consumer Electronics (now Thomson Consumer Electronics) and with later support from such organizations as ABC and HBO. There are two ACTVs. a) ACTV I is a channel-compatible, receiver-compatible system using many different techniques to add widescreen panels and increase horizontal and vertical resolution. Among the techniques are the filling of a Fukinuki hole, time compression, seam-elimination, spatio-temporal filtering, and quadrature modulation of the picture carrier. The last prevents direct compatibility with videotape recorders and with ordinary satellite transmission techniques. b) ACTV II is ACTV I plus an augmentation channel to improve resolution and sound.
Industry:Entertainment
Frame rate of television in all countries not conforming to CCIR system M (NTSC). Also the frame rate of film shot for television in those countries.
Industry:Entertainment
A term sometimes used for both EDTV and HDTV.
Industry:Entertainment
Frame rate of NTSC color television, changed from 30 so that the color subcarrier could be interleaved between both the horizontal line frequency and the sound carrier.
Industry:Entertainment
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
