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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.
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
The process of recovering the intelligence from a modulated carrier.
Industry:Entertainment
A device which recovers the original signal after it has been modulated with a high-frequency carrier. In television, it may refer to: an instrument such as the Tektronix 1450 which takes video in its transmitted form (modulated picture carrier) and converts it to baseband; the circuits which recover R-Y and B-Y from the composite signal.
Industry:Entertainment
A device used to separate two or more signals that were previously combined by a compatible multiplexer and transmitted over a single channel.
Industry:Entertainment
Separating elementary streams or individual channels of data from a single multi-channel stream. For example, video and audio streams must be demultiplexed before they are decoded. This is true for multiplexed digital television transmissions.
Industry:Entertainment
Varies the intensity of shaded surfaces as a function of distance from the eye.
Industry:Entertainment
The range of objects in front of a camera lens which are in focus. Smaller f-stops provide greater depth of field, i.e., more of the scene, near to far, will be in focus.
Industry:Entertainment
This measurement indicates whether or not video signal levels are properly represented in the RF signal. The NTSC modulation scheme yields an RF signal that reaches its maximum peak-to-peak amplitude at sync tip (100%). In a properly adjusted signal, blanking level corresponds to 75%, and peak white to 12.5%. The zero carrier reference level corresponds to 0%. Refer to the diagram at the right. Over modulation often shows up in the picture as a nonlinear distortion such as differential phase or differential gain. ICPM or white clipping may also result. Under modulation often results in degraded signal-to-noise performance.
Industry:Entertainment
The process of rescaling the quantized discrete cosine transform coefficients after their representation in the bit stream has been decoded and before they are presented to the inverse DCT Deserializer
Industry:Entertainment
