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- 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 version of the VHS tape format using smaller cassettes that may also be played on standard VHS machines by using an adapter cartridge.
Industry:Software
UDF filename used for the video directory on the disc volume.
Files under this directory name contain pointers to the sectors on the disc that hold the program streams.
Industry:Software
The organization, headquartered in Brussels, investigates the ways of developing European widescreen production and seeks to contribute to the deployment of digital and widescreen broadcasting and high definition video production. Specifically, the organization helps European producers in the making of programs through provision of technical expertise.
Industry:Software
Device that produces a test signal in the video in the vertical interval so as not to be visible to the home viewer but allows the broadcasters to test signal quality during transmission.
Industry:Software
The A-curve is a side bandpass filter centered at 2.5 kHz with ~20 dB attenuation at 100 Hz, and ~10 dB attenuation at 20 kHz. Therefore, it tends to heavily roll off the low end, with a more modest effect on high frequencies. It is essentially the inverse of the 30-phon (or 30 dB-SPL) equal-loudness curve of a Fletcher-Munson.
Industry:Software
The B-weighting curve is used for intermediate level sounds and has the same upper corner as the C-weighting, but the lower amplitude corner is 120 Hz.
Industry:Software
The C-curve is basically “flat,” with –3 dB corners of 31.5 Hz and 8 kHz, respectively.
Industry:Software
This filter was designed to maximize its response to the types of impulsive noise often coupled into audio cables as they pass through telephone switching facilities. The CCIR 468-curve peaks at 6.3 kHz, where it has 12 dB of gain (relative to 1 kHz). From here, it gently rolls off low frequencies at a 6 dB/octave rate, but it quickly attenuates high frequencies at ~30 dB/octave (it is down –22.5 dB at 20 kHz, relative to +12 dB at 6.3 kHz).
Industry:Software
This curve is derived from the CCIR 468-curve. Dolby Laboratories proposed using an average-response meter with the CCIR 468-curve instead of the costly true quasi-peak meters used by the Europeans in specifying their equipment. They further proposed shifting the 0 dB reference point from 1 kHz to 2 kHz (in essence, sliding the curve down 6 dB). This became known as the CCIR ARM (average response meter), as well as the CCIR 2 kHz-weighting curve.
Industry:Software
Now part of GE. RCA was once involved in every aspect of television, from camera to receiver, supplying production, transmission, consumer electronic, and CATV equipment, and operating a television network (NBC) and a satellite transmission carrier.
RCA developed the first effective HDTV camera tube, proposed several HDEP schemes ranging from 750 to 2625 scanning lines, and did extensive ATV research at RCA Laboratories (now SRI International’s DSRC).
RCA’s broadcast equipment group no longer exists, Burle is selling its tubes, and its consumer electronics are now part of the Thomson group.
GE has, thus far, retained the satellite transmission carrier (renaming it GE Americom) and the NBC television network, a proponent of the ACTV ATV schemes.
Industry:Software
