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User’s Guide CineMaster 45
Compression –
Reduction of the amount of data used to represent a signal.
Uncompressed video data requires an enormous amount of digital data, making
it impractical to store or transfer without processing. Compression algorithms
were carefully developed to minimize the perceived quality loss; these are
applied to reduce the data rate for storage and playback.
CVBS –
Composite Video Baseband Signal
.
Often referred to as composite
video signal or CVS.
Deinterlace –
The process of combining or otherwise using interlaced odd and
even fields in a video signal to create non-interlaced video frames. The actual
method for accomplishing this can be as simple as discarding all of the even (or
odd) fields, or as complex as using a hardware digital filter to combine the odd
and even fields into full frames.
Dolby ProLogic –
A method (created by Dolby Laboratories) for encoding
Surround Sound information onto two-channel analog output. The information
is phase-encoded, and can be decoded into the separate Surround channels by a
ProLogic decoder or amplifier.
DirectX (DirectDraw) –
Microsoft Corporation’s standard interface for
applications that provides software applications with a mechanism for
accessing functions that relate to digital video, hardware scaling, and other
useful functions that can be supported by a display controller. DirectDraw is a
part of DirectX, and contains, for example, such functions as “Overlay”, which
is a hardware scaling capability. This interface is defined in explicit detail, and
can be implemented into the display card (VGA) drivers. DirectX is additional
functionality that can be added to Windows 95 by installing it. When DirectX
is installed, and supported in the VGA drivers, its capabilities then become
available to applications, eliminating the need for hardware-dependent code.
Not all VGA cards that have Direct Draw drivers can do hardware scaling
(Overlay).
Display Mode –
The combination of color depth and resolution that defines
how a computer display (and, typically, video played on it) appears.