Vantage Hearth HD 8000S, Руководство пользователя

Страница: 54 / 60

G
lossary
54
English
RGB:
The RGB color model is an additive color model in which red, green, and blue light are
added together in various ways to reproduce a broad array of colors. The name of the
model comes from the initials of the three additive primary colors, red, green, and blue.
YUV: older but common name for Component Video or YPbPr.
YPbPr is a color space used in video electronics, in particular in reference to component
video cables. YPBPR is the analog version of the YCBCR color space; the two are numeri -
cally equivalent, but YPBPR is designed for use in analog systems whereas YCBCR is
intended for digital video.
Composite Video:
Composite video is the format of an analog television (picture only) signal before it is com-
bined with a sound signal and modulated onto an RF carrier.
Composite video is often designated by the CVBS acronym, meaning any of “Color, Video,
Blank and Sync”, “Composite Video Baseband Signal”, “Composite Video Burst Signal”, or
“Composite Video with Burst and Sync”.
Lettebox:
Letterboxing is the practice of transferring widescreen film to video formats while preserv -
ing the film’s original aspect ratio. On video displays with a 4:3 aspect ratio, the resulting
videographic image has mattes (black bars) above and below it; LTBX is the identifying
acronym for films and images so formatted
Pan & Scan:
Pan and scan is one method of adjusting widescreen film images so that they can be
shown within the proportions of a standard definition 4:3 aspect ratio television screen,
often cropping off the sides of the original widescreen image to focus on the composition’s
most important aspects. Some film directors and film enthusiasts disagree with pan and
scan cropping, because it can remove up to 45% (on 2.35:1 films) of the original image,
changing the director’s original vision and intentions. The vertical equivalent is known as
“tilt and scan” or “reverse pan and scan”.
Dolby Digital (or ATSC A/52 and AC-3) is a multi channel -Soundsystem of Dolby labs.
Its been used in movies, DVDs and digital TV transmissions.
PCM: Puls-Code-Modulation
Pulse-code modulation (PCM) is a digital representation of an analog signal where the
magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series
of symbols in a numeric (usually binary) code. PCM has been used in digital telephone
systems and 1980s-era electronic musical keyboards. It is also the standard form for digital
audio in computers and the compact disc “red book” format. It is also standard in digital
video.