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4.3.3.
Internal Bandwidth
General Description
This section helps you select the most appropriate bitrate for the native codec(s) on the
EVS server, on the basis of the internal bandwidth, the channel configuration, and the
calculated number of real-time channels at the EVS server level.
The section therefore presents tables including the following parameters:
1.
Video Bitrate:
codec bitrate set by the user in the
Codec
section of the
Server
tab in
the Multicam Configuration window.
2.
Fields/Block:
numbers of video fields that can be stored in one disk block of 8 MB,
taking into account 8 audio track, in 1080i.
3.
Actual Bandwidth:
actual disk/network bandwidth required for the real-time record or
real-time playback of one video stream and its associated audio tracks.
4.
Max. RT Channels:
maximum number of video channels (real-time record or real-
time playback) that one EVS server can support for a given frame rate and bitrate.
Since an XS server can have a maximum of 6 local video channels, any value higher
than 6 means that these additional real-time accesses can be used for transfers over
the XNet (SDTI) network.
The RT Channels calculation is based on the use of Seagate disks of 300 GB (10K5)
configured in 4+1 raids. Such disks are able to write 300 MB/s.
Bandwidth and RT Channels at 50 Hz (PAL)
Codec
Field
Rate
(Hz)
Video
Bitrate
(Mbps)
Fields/
Block
Block-based
bandwidth
(MB/s)
Max. RT
Channels
XDCAM HD
50.00
50
30
13.4
22.4
Apple ProRes 422 LT
50.00
85
34
11.8
25.4
HD Mjpeg Standard
50.00
100
12
33.4
9.0
HD Mpeg-2 Intra
50.00
100
6
66.7
4.5
DVCPro HD
50.00
100
17
23.6
12.7
AVC Intra 100
50.00
111
29
13.8
21.7
Avid DNxHD® 120
50.00
120
27
14.9
20.1
Apple ProRes 422 SQ
50.00
120
24
16.7
17.9
Avid DNxHD® 185
50.00
185
18
22.3
13.4
Apple ProRes 422 HQ
50.00
185
16
25.0
12.0
20
4. Software Specifications
EVS Broadcast Equipment SA
Issue 12.05.B - July 2014
Содержание XS
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Страница 93: ...Connector Layouts HARDWARE TECHNICAL REFERENCE MANUAL XS Server 12 05 6 Boards Description 83 ...
Страница 94: ...84 6 Boards Description EVS Broadcast Equipment SA Issue 12 05 B July 2014 ...
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