Marshall Electronics VS-102-HDSDI, Руководство пользователя

Страница: 26 / 62

VS-102-HDSDI User Manual
IP Server Instruction Manual
26/61

Quality
Select video quality. Eight levels of quality are available.
Quality mode (VBR encoding) adjusts the bit rate according to the image complexity, using
higher bandwidth for increased activity in the video and lower bandwidth for decreased activity.
It is preferred when the activity change in the video is significant or the network capacity is
insufficient to allot certain bit rate continually.

Bit rate
Determine the bit rate value between 32 ~ 8000kbps.
Bit rate mode (CBR encoding) allows you to set a fixed target bit rate that consumes a
predictable amount of bandwidth. If the network capacity is good enough to allot certain bit rate
and a substantial bit rate is set, lowering quality can be prevented regardless of the activity
change in the video.

I-Frame Interval
Possible values between 0 and 255. There will be no I-frames if 0 is selected.

H.264 Profile
Select the H.264 Profile: High Profile or Baseline Profile.
The standard defines various sets of capabilities, which are referred to as profiles, targeting
specific classes of applications.
-
High Profile (HiP)
This is the primary profile for broadcast and disc storage applications, particularly for high-definition
television applications (for example, this is the profile adopted by the
Blu-ray Disc storage
format and the DVB HDTV broadcast service).
-
Baseline Profile (BP)
Primarily for low-cost applications that require additional data loss robustness, this profile is
used in some videoconferencing and mobile applications. This profile includes all features that
are supported in the Constrained Baseline Profile, plus three additional features that can be
used for loss robustness (or for other purposes such as low-delay multi-point video stream
compositing).