Quadrant tech DVD Playback Card C-1.2D ユーザーズマニュアル
CineMaster
User’s Guide
46
DVD –
A specification for storing digital data (usually high-quality video and
audio) on a read-only disc that is the same physical size as a CD-ROM. DVD
discs have much higher data capacity (4.7 GB per layer) than CD-ROMs (680
MB). This enhancement allows them to contain not only 2.5 hours of video,
but also 5-channel 16-bit digital audio, multiple language playback, closed-
captioning, and hypertext content. DVD is a standard that was developed by
ten companies known as the Consortium.
discs have much higher data capacity (4.7 GB per layer) than CD-ROMs (680
MB). This enhancement allows them to contain not only 2.5 hours of video,
but also 5-channel 16-bit digital audio, multiple language playback, closed-
captioning, and hypertext content. DVD is a standard that was developed by
ten companies known as the Consortium.
Encryption –
Part of the DVD specification that requires that the digital data
on the DVD disc be encoded in such a way that it cannot be read or decoded
except by authorized playback devices. This was necessary to protect the
content from illegal copying.
except by authorized playback devices. This was necessary to protect the
content from illegal copying.
Field –
One complete vertical scan of an interlaced video frame, representing
half of the data in the frame. A field consists of all of the scan lines (each made
up of pixels) that are on odd rows of the screen (“odd field”) or all of the scan
lines that are on even rows of the screen (“even field”). Each field, therefore,
contains half of the information in an interlaced video frame. Conventional
video technology that uses interlacing (such as televisions) first displays all of
the odd fields by displaying the top line (line 1), skipping a line (line 2),
displaying the next line (line 3), and so forth until all of the odd lines that make
up the field have been scanned. Then, the skipped (even) lines are displayed
(between the odd lines, where they belong), and this process of alternating odd
and even fields is repeated. Persistence (i.e., the ability of phosphor dots on the
screen to remain lit for a period of time) gives the appearance of a complete
image. Computer monitors are generally not operated in this manner; rather,
they are updated with all scan lines in sequence (line 1, line 2, line 3, etc.),
because they have shorter persistence phosphor and appear to flicker unless
every line is rescanned every frame.
up of pixels) that are on odd rows of the screen (“odd field”) or all of the scan
lines that are on even rows of the screen (“even field”). Each field, therefore,
contains half of the information in an interlaced video frame. Conventional
video technology that uses interlacing (such as televisions) first displays all of
the odd fields by displaying the top line (line 1), skipping a line (line 2),
displaying the next line (line 3), and so forth until all of the odd lines that make
up the field have been scanned. Then, the skipped (even) lines are displayed
(between the odd lines, where they belong), and this process of alternating odd
and even fields is repeated. Persistence (i.e., the ability of phosphor dots on the
screen to remain lit for a period of time) gives the appearance of a complete
image. Computer monitors are generally not operated in this manner; rather,
they are updated with all scan lines in sequence (line 1, line 2, line 3, etc.),
because they have shorter persistence phosphor and appear to flicker unless
every line is rescanned every frame.
Frame –
A single complete video image consisting of two interlaced fields (one
odd and one even).