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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.
The measurement and evaluation of the spectral sensitivities of the three color channels of a television camera. The camera and matrixing are identified and measured.
Industry:Entertainment
a) Operation where the bit rate is constant from start to finish of the compressed bit stream.
b) A variety of MPEG video compression where the amount of compression does not change.
c) CBR traffic requires guaranteed levels of service and throughput in delay-sensitive applications such as audio and video that are digitized and represented by a continuous bit stream.
Industry:Entertainment
Lossless compression requires that the reproduced reconstructed bit stream be an exact replica of the original bit stream. The useful algorithms recognize redundancy and inefficiencies in the encoding and are most effective when designed for the statistical properties of the bit stream. Lossless compression of image signal requires that the decoded images match the source images exactly. Because of differences in the statistical distributions in the bit streams, different techniques have thus been found effective for lossless compression of either arbitrary computer data, pictures, or sound.
Industry:Entertainment
For optimum image quality, both objective and perceived, the spectral sensitivities of the three color channels of a television camera should be matched to the primary colors of the R, G, B color space. Note: Some practice still exists matching the color channels of the camera to the display phosphors. This reduces the color gamut and carries unnecessary noise penalties. The practice is deprecated.
Industry:Entertainment
A compressed video bit stream with a constant average bit rate.
Industry:Entertainment
Television camera and associated equipment, consisting of power supply and sync generator.
Industry:Entertainment
A rule of composite color television that any change in color not accompanied by a change in brightness should not have any effect on the brightness of the image displayed on a picture tube. The constant luminance principle is generally violated by existing NTSC encoders and decoders. See also Gamma.
Industry:Entertainment
A small reference packet of the subcarrier sine wave, typically 8 or 9 cycles, which is sent on every line of video. Since the carrier is suppressed, this phase and frequency reference is required for synchronous demodulation of the color information in the receiver. Refer to the Horizontal Timing discussion.
Industry:Entertainment
Bit-rate reduction of an image signal, by an algorithm recognizing the high degree of correlation ascertainable in specific images. The reproduced image does not replicate the original when viewed in direct comparison, but the losses are not obvious or recognizable under the intended display conditions. The algorithm may apply transform coding, predictive techniques, and other modeling of the image signal, plus some form of entrophy encoding. While the image appears unaltered to normal human vision, it may show losses and artifacts when analyzed in other systems (i.e., chroma key, computerized image analysis, etc.). The lost information cannot be regenerated from the compressed bit stream.
Industry:Entertainment
