Glossary
page 51
LaCie silverscreen
User’s Manual
Glossary
16:9 –
Also known as WideScreen, this is an aspect ratio used primarily in widescreen TVs, and, in Europe, in particular, in
an increasing number of television programs. This aspect ratio is best suited for a widescreen TV display.
4:3 LetterBox –
Also known as LetterBox, this is the aspect ratio of traditional TV pictures. In this format, a full widescreen
image is displayed, but black bars will be visible above and below the screen image.
4:3 PanScan –
Also known as Pan & Scan, this is also within the aspect ratio of tradtional TV pictures. In this format, a
widescreen image is displayed as a 4:3 image, which is narrower than the original (the left and right edges of the picture
may be outside the range of the TV screen).
480p –
Also known as 480 progressive, this is a form of standard-definition digital television (SDTV) which is similiar to VGA
computer displays. A DVD’s resolution is 480p, but this resolution can only be seen when the DVD player outputs a
progressive-scan signal, and the television has progressive-scan or component-video inputs.
480i –
Also known as 480 interlaced, this is another form of standard-definition digital television (SDTV) that approximates
the quality of analog television. Although a DVD’s resolution is 480p, it is often viewed at 480i on NTSC analog televisions.
720p –
Also known as 720 progressive, this is one of two formats designated as a high-definition digital television (HDTV),
ATSC DTV standard. This technology uses progressive scanning and is comprised of 720 vertical pixels by 1,280 horizontal
pixels.
1080i –
Also known as 1080 interlaced, this is the second of two formats designated as a high-definition digital television
(HDTV), ATSC DTV standard. This technology uses interlaced scanning and is comprised of 1,080 vertical pixels by 1,920
horizontal pixels.
AC3 (Audio Coding 3) –
This is an advanced audio compression technology that allows encoding of six separate channels at
a bit rate of 448kbits/s.
AVI (Audio Video Interleave) –
A file format that can contain audio/video compressed standards using different combinations
of codecs (e.g. DivX® video file and a WMA audio file). As long as the codec is available for encoding/decoding, AVI can
contain many different combinations of audio and video files.
Backup –
(1) The act of creating at least one additional copy of data onto a different (and safe) storage device from where it
can be retrieved at a later time if needed. (2) A copy of a file, directory, or volume on a separate storage device from the
original, for the purposes of retrieval in case the original is erased, damaged, or destroyed.
