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CineMaster User’s Guide50
Resolution –
In video terms, resolution is the relative density of information
that can be displayed, expressed in terms of the total number of horizontal and
vertical pixels. The higher the pixel count, the higher the resolution and the
greater the amount of detail that is displayable. A display that is 1024
×
768 has
1024 pixels per line and 768 lines per frame. Together with Color Depth, it
defines the
video mode
.
S-Video –
A method for encoding video, or for transferring it from one device
to another (such as from
CineMaster
to an S-video monitor), which achieves a
significant improvement in quality over the standard composite video encoding
method by preserving separate chrominance and luminance signals. S-Video is
sometimes referred to as component video. Like Composite video, S-Video is
encoded according to one of the video standards (NTSC, PAL, or SECAM).
Sync –
The portion of the video signal that indicates to a monitor that it is at
the end of a line or the end of a field or frame. When a sync pulse is detected,
the monitor starts a trace at the beginning of the next line, or returns to the top
of the screen. This signal is transferred to the monitor either as part of the
video (encoded in the Y component of S-video, or mixed with all of the video
signal components for composite video), or it is carried as separate horizontal
sync (HS) and vertical sync (VS), such as is the case for a VGA monitor. As
resolution and color depth increase, the frequencies of the horizontal and
vertical sync pulses also increase.
VideoInlay –
A new technique for displaying live video on a VGA display by
sending the data over the PCI bus. This doesn’t require a direct connection to
the VGA card and provides greater flexibility in the choice of VGA card used.
The digital video is scaled and converted (in hardware) to the computer’s
native RGB format (if needed), and the converted video is moved from the
CineMaster
card directly to the graphics card using advanced PCI Bus
Mastering Burst DMA (Direct Memory Access). This technique bypasses the
host processor to move video data as quickly as possible, leaving the computer
free to perform other processing tasks.
Y/C –
Abbreviation for Luminance and Chrominance, respectively; the two-
channel video signal standard employed by so-called "Super" or S-video
(S-VHS, Hi-8) equipment. The luminance channel carries information on the
relative brightness levels carried in the video frame. The chrominance channel
carries information describing the actual color content.