- Industrie:
- Number of terms: 20560
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- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A miniature cassette system originated by Philips, allowing 15 minutes of recording per side on a narrow tape.
Industry:Software
Audio-rate time code information that is stored on its own audio track. This audio-rate signal allows the editing system to track the position of the tape even at high shuttle speeds where VITC data could not be used.
Industry:Software
Motion pictures taken of a programme photographed directly from images on the face of a kinescope tube. A television transcription.
Industry:Software
A distortion of the picture carrier phase caused by changes in either the chrominance or luminance video signal levels. This distortion is described in degrees using the following definition: ICPM = acrtan (quadrature amplitude/video amplitude) The picture effects of ICPM will depend on the type of demodulation being used to recover the baseband signal from the transmitted signal. ICPM shows up in synchronously demodulated signals as differential phase and many other types of distortions, but the baseband signal is generally not as seriously affected when envelope detection is used. The effects of ICPM are therefore rarely seen in the picture in home receivers, which typically use envelope detection. However ICPM may manifest itself as an audio buzz at the home receiver. In the intercarrier sound system, the picture carrier is mixed with the FM sound carrier to form the 4.5 MHz sound IF.
Audio rate phase modulation in the picture carrier can therefore be transferred into the audio system and heard as a buzzing noise. An unmodulated 5 to 10 stairstep signal or unmodulated ramp can be used to test for this distortion.
Industry:Software
Distortions involving signals in the greater than 16 msec range. Long-time distortions affect slowly varying aspects of the signal such as changes in APL which occur at intervals of a few seconds. The affected signal components range in duration from 16 msecs to tens of seconds. The peak overshoot, in IRE, which occurs as a result of an APL change is generally quoted as the amount of distortion.
Settling time is also sometimes measured. Long-time distortions are slow enough that they are often perceived as flicker in the picture. See the discussion on Linear Distortions.
Industry:Software
Special effect in which either blacks and whites are reversed or colours are inverted. For example, red becomes a blue-green, green becomes purple, etc. The Video equaliser and Digital Video Mixer includes a negative effect which can be used to generate electronic colour slides from colour negatives. An electronic colour philtre can be used for fine adjustment of the hues.
Industry:Software
By convention, the circuitry introducing white compression into the opto-electric transfer function and thereby modifying the curve for a more gradual approach to white clip.
Industry:Software
A unit of measure, developed by the CIE, to define the change in light and colour required to be just noticeable to the human eye. The human being in this MPCD unit is defined as “a trained observer” because there are differences in the way each of us perceive light.
Industry:Software
Debugging aid that connects to the system under test by plugging into the microprocessor’s socket. This allows the ICE to gain full control over the system. Typical features include the ability to set breakpoints, single-step a program, examine and modify registers and memory, and divide memory and I/O between the system under test and the ICE system.
Industry:Software
