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Initially, Bazaarvoice focused on software that lets businesses add product reviews to their websites. [5] [6] Bazaarvoice later expanded to include software that allows businesses to analyze reviews, ratings, videos, social media, and other user-generated content posted by customers, [7] which is used by companies including Wal-Mart, AT&T and ...
For example, Compact Disc Digital Audio and Digital Audio Tape systems use different sampling rates, and American television, European television, and movies all use different frame rates. Sample-rate conversion prevents changes in speed and pitch that would otherwise occur when transferring recorded material between such systems.
When analog video is converted to digital video, a different sampling process occurs, this time at the pixel frequency, corresponding to a spatial sampling rate along scan lines. A common pixel sampling rate is: 13.5 MHz – CCIR 601, D1 video; Spatial sampling in the other direction is determined by the spacing of scan lines in the raster. The ...
The company evolved the system continuously through the early 1980s to integrate the first 16-bit digital sampling system to magnetic disk, and eventually a 16-bit polyphonic sampling system to memory, as well. The company's product was the only digital sampling system that allowed sample rates to go as high as 100 kHz.
Early uses of the term Nyquist frequency, such as those cited above, are all consistent with the definition presented in this article.Some later publications, including some respectable textbooks, call twice the signal bandwidth the Nyquist frequency; [6] [7] this is a distinctly minority usage, and the frequency at twice the signal bandwidth is otherwise commonly referred to as the Nyquist rate.
In digital signal processing, a digital down-converter (DDC) converts a digitized, band-limited signal to a lower frequency signal at a lower sampling rate in order to simplify the subsequent radio stages. The process can preserve all the information in the frequency band of interest of the original signal.
In systems science, a sampled-data system is a control system in which a continuous-time plant is controlled with a digital device. Under periodic sampling , the sampled-data system is time-varying but also periodic; thus, it may be modeled by a simplified discrete-time system obtained by discretizing the plant.
The hardware (traditionally metal tubing, compression fittings, valves, regulators, rotameters and filters) associated with extractive sampling is collectively referred to as the sampling system. Sample systems are used to condition or adjust the sample conditions (pressure, amount of particulate allowed, temperature and flow) to a level ...