TCH group BC840-MC series, Руководство пользователя

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11.5.1 Encoder Settings
Item Description
Enable All encoders are enabled by default. Use this check box to disable/re-
enable this specific encoder.
Encoding mode MPEG-4 or MPEG-2 The method used to compress the video
signal.
Video bit rate
mode Controls variations in bit rates. For a concise explanation, consult the
note on Encoder Settings later in this chapter..
MPEG-4 encoding mode supports the following bit rate modes.
Constant quality Keeps the image quality constant, with
varying network load (from a few kb/s to 10
Mb/s or higher). The image quality is
determined by the values set for the “Q min I”
and “Q min P” parameters in the Advanced
Settings section.
Variable bit rate Variable network load, but limited to value set
for the VBR maximum bit rate parameter in
the Advanced Settings section. The frame rate
will suffer when the VBR maximum bit rate is
reached.
Variable bit rate, non-
drop Variable network load, but limited to value set
for the VBR maximum bit rate parameter in
the Advanced Settings section. The quality will
decrease when the VBR maximum bit rate is
reached. The frame rate will be constant.
Constant bit rate Keeps network load constant at the cost of
varying image quality. Frames may be
skipped.
Constant bit rate,
non-drop Keeps network load constant at the cost of
varying image quality. Frames are never
skipped.
MPEG-2 encoding mode supports the following bit rate mode.
Constant bit rate,
non-drop Keeps network load constant at the cost of
varying image quality. Frames are never
skipped.
Resolution The following resolutions are supported.
resolution (h x v) PAL NTSC
D1 720x576 720x480
2/3 D1 480x576 480x480
1/2 D1 352x576 352x480
Video
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