- Industry:
- Number of terms: 20560
- Number of blossaries: 0
- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
Pictures that are coded by using information present only in the picture itself and without depending on information from other pictures. I-pictures provide a mechanism for random access into the compressed video data. I-pictures employ transform coding of the pixel blocks and provide only moderate compression.
Industry:Software
Edit in which a scene already recorded on the master is continued with no apparent interruption. A match-frame edit is done by setting the record and source in-points equal to their respective outpoints for the scene that is to be extended.
Industry:Software
For comparisons of perceived image quality resulting from a controlled variant within a single system, a requirement encountered when fine-tuning a system, the technique of ordinal-scaling is frequently employed. The ordinal-scale indicates that one image is preferred over another. Observers are asked to evaluate perceived image quality on an established scale, usually of five levels, from excellent to unacceptable. Correlations among isolated tests are sometimes uncertain.
Industry:Software
A terrestrial broadcasting technology which uses low-power microwave transmitters, and is mainly used for extending the range of cable TV systems and for TV distribution in sparsely populated areas or in areas with rough terrain.
MMDS is not specifically analog or digital. In digital MMDS, the use of MPEG is highly attractive to boost the number of channels that may be distributed.
Industry:Software
Compression that works entirely within one picture: also known as Spatial Coding.
Industry:Software
Each material has a number of attributes such as transparency, ambient, diffusion, refraction, reflection, and so on.
Industry:Software
When images that differ significantly in creation, display, and content are being compared and intervalscaling becomes necessary, interpretation of the results become more and more complex as the number of observers is increased. Ratio-scaling provides a means for correlating multiple observations and multiple data sources. Observers are asked to assign a numerical value to perceived image quality (either in total or with regard to a specified characteristic such as noise, resolution, color rendition, etc.). They are also asked to identify numerical values for the best possible image, and the completely unacceptable image. Each is allowed to choose a numerical scale with which the observer feels most comfortable. The relationship between the value for the test image and the two extremes provides a useful ratio.
Analyses involving comparisons among observers, comparisons with other systems, correlation of results obtained over periods of time, etc., are made by normalizing each observer’s scale (for example, best possible = 100, completely unacceptable = 0).
Industry:Software
A video system is considered to be locked when the receiver is producing horizontal syncs that are in time with the transmitter.
Industry:Software
The data broadcast specification profile for multiprotocol encapsulation supports data broadcast services that require the transmission of datagrams of communication protocols via DVB compliant broadcast networks. The transmission of datagrams according to the multiprotocol encapsulation specification is done by encapsulating the datagrams in DSM-CC sections, which are compliant with the MPEG-2 private sector format.
Industry:Software
