VBrick Systems VB5000 - Manual (Page 36)

28 © 2009 VBrick Systems, Inc.
Reference Distance For models ending in -xxx1/-xxx2, enables a user to set the difference
between consecutive reference frames within a group of pictures
(GOP). The values available are 1–3 (default = 2). If the Encoder
Transport Delay setting is low or medium, the value must be 1. Does
not apply to models ending in -xxx0. If Reference Distance and
Intrapicture Distance are both 1, the encoder will produce all I
frames.
Intrapicture
Distance Enables the user to set the distance between consecutive I frames
within a Group Of Pictures (GOP). The values available are 1–19
(default = 16). Does not apply to models ending in -xxx0. If
Reference Distance and Intrapicture Distance are both 1, the encoder
will produce all I frames.
Luminance 0 to 255. Default = 128. The luminance is the information about the
varying light intensity of an image, which is best described as
brightness.
Contrast 0 to 127. Default = 62. The contrast is the range of light-to-dark
values of an image that are proportional to the voltage differences
between the black and white levels of the signal.
Saturation 0 to 127. Default = 66. The saturation is the spectral purity or
intensity of a color.
Hue Range is -128 to 127. Default = 0. The hue is the attribute by which a
color may be identified within the visible spectrum. Hue refers to the
spectral colors of red, orange, yellow, green blue and violet. Adding
hue reduces the saturation.
Resolution For models ending in -xxx0, the video resolution can be adjusted to
Full D1, 1/2 D1, or 2/3 D1. For models ending in other than -xxx0,
the video resolution can be Full D1, 1/2 D1, 2/3 D1, 352x240 (SIF),
or 352x288 (CIF). Note that D1 resolution is not recommended at
video encode rates below 5 Mbps. In SIF mode only closed
captioning CC1 and CC2 in the menu settings of the video display are
valid (TV menu monitor settings) CC3 and CC4 fields are not
supported. The actual resolutions for NTSC and PAL are listed
below:
NTSC D1 720x480
NTSC 1/2 D1 352x480
NTSC 2/3 D1 480x480
NTSC SIF 352x240
PAL D1 720x576
PAL 1/2 D1 352x576
PAL 2/3 D1 480x576
PAL CIF 352x288
Bit Rate The encoder's bit rate can be adjusted from 1 Mbps to 10 Mbps for
models ending in –xxx0. For models ending in other than -xxx0, the
bit rate can be adjusted from 1–15 Mbps.