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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.
Ready to use for transmission or videotaping, this is the PGM output.
Industry:Software
The erasure of high frequencies which occurs during recording due to the formation of a secondary gap after the trailing edge of the record head. Self-erasure is increased by excess bias and by excess high-frequency signal levels (especially at low tape speeds).
Industry:Software
Equipment that generates synchronising pulses needed by source equipment. Also called sync generator or SPG.
Industry:Software
A camera which contains an electronic image sensor rather than photographic film. The lens focuses an image on an electronic tube or CCD chip. A camera has electronic circuitry which generates colour and sync pulses. Most portable consumer cameras are equipped with a full complement of audio circuitry, e.g., microphone, audio amplifier, and additional audio electronics. In order to obtain better quality images, a professional camera has three tubes or a triple CCD system, one for each basic color. Most professional cameras have a genlock input, which allows the camera to be synchronised to an external source. Some cameras also include basic character generators for titling purposes.
Industry:Software
The percentage elongation remaining in a tape or length of base film after a given load, applied for a given time, has been removed and the specimen allowed to hang free, or lightly loaded, for a further period.
Industry:Software
Region coding has received attention because of the ease with which it can be decoded and the fact that a coder of this type is used in Intel’s Digital Video Interactive system (DVI), the only commercially available system designed expressly for low-cost, low-bandwidth multimedia video. Its operation is relatively simple. Envision a decoder that can reproduce certain image primitives well. A typical set of image primitives might consist of rectangular areas of constant color, smooth shaded patches, and some textures. The image is analysed into regions that can be expressed in terms of these primitives. The analysis is usually performed using a tree-structured decomposition where each part of the image is successively divided into smaller regions until a patch that meets either the bandwidth constraints or the quality desired can be fitted. Only the tree description and the parameters for each leaf need then be transmitted.
Since the decoder is optimised for the reconstruction of these primitives, it is relatively simple to build. To account for image data that does not encode easily using the available primitives, actual image data can also be encoded and transmitted, but this is not as efficient as fitting a patch. This coder can also be combined with prediction (as it is in DVI), and the predicted difference image can then be region coded. A key element in the encoding operation is a region growing step where adjacent image patches that are distinct leaves of the tree are combined into a single patch. This approach has been considered highly asymmetric in that significantly more processing is required for encoding/analysis than for decoding. While hardware implementations of the hybrid DCT coder have been built for extremely low bandwidth teleconferencing and for HDTV, there is no hardware for a region coder. However, such an assessment is deceptive since much of the processing used in DVI compression is in the motion predictor, a function common to both methods. In fact, all compression schemes are asymmetric, the difference is a matter of degree rather than one of essentials.
Industry:Software
The function that changes the aspect ratio and size of the image. The word Source refers to the image generated by the input video, which occupies “Source Space” on the screen. a) Source Aspect uses the X and Y axis. b) Source Size uses the Z axis. The image does not move.
Industry:Software
One of the first television set manufacturers to demonstrate an IDTV set. Also a proponent of a widescreen ATV system using highfrequency subcarriers to carry the side panels in a receiver-compatible, channel-compatible signal.
Industry:Software
Interconnect consists of a single wire transporting an encoded, composite analogue video signal.
Industry:Software
A set of electronic circuitry used to insure that the video output signal of a switcher (or other video equipment) maintains proper levels and relationships and that sync and burst are clean and useable. The AVC series switcher comes with a limited proc amp as a standard feature. This proc amp can pass the video signal as it appears at the input, or strip the old sync and add a new sync pulse. It can also strip both sync and burst and add new sync and burst prior to the output of the switcher.
Industry:Software
