EVS XT Series Technical Reference

XT Series DISK RECORDER - Technical Reference
EVS Broadcast Equipment SA - Nov 2005
Issue 3.0
10
2.5.3 VIDEO BITRATE
The EVS XT server uses an intra-frame video encoding technique. The
average bitrate of the encoded video stream can be set by the user within
the accepted range. 8 to 100Mbps for standard definition, 40 to 250Mbps
for high definition. The default values are 30Mbps for standard definition
and 100Mbps for high definition.
2.5.4 DISK BLOCK SIZE
Video and audio data are saved on the video raid in fixed-size blocks.
Working with large blocks is advised to improve the bandwidth of the disk
in order to minimize the disk heads movements. However, large blocks are
not recommended in search mode because it takes more time to load them.
512-KB blocks on disks are a good compromise.
All servers connected together on XNet SDTI network must
have the same
disk block size ! This parameter can be found in the Advanced Parameters
section of the Maintenance Menu.
-
2.5.5 RECORDING CAPACITY FOR XT SERVERS
The following table shows the record duration for 1 record channel (i.e. 1
video + 2 stereo audio tracks) with a tray of 18GB, 36GB, 73GB or 146GB
disks compared with the different video bitrates. The Operational Disk Size
parameter is set to 100%.
The different drive arrangements are:
Module (4 + 1) x 73 GB drives (total 292 GB usable)
Module (4 + 1) x 146 GB drives (total 584 GB usable)
Module (4 + 1) x 300 GB drives (total 1168 GB usable)
Module (8 + 2) x 300 GB drives (total 2336 GB usable)
Disks Size
PAL
Compression + Bitrate 5x73GB 5x146GB 5x300GB 10x300GB
MJPEG / IMX 30 Mbps
18:25 37:00 76:09 152:27
MJPEG / IMX 40 Mbps
13:49 27:45 57:07 114:20
SD
MJPEG / IMX 50 Mbps
11:31 23:07 47:36 95:16
HD
MJPEG/MPEG 100 Mbps
8:27 16:57 34:54 69:52

EVS XT Series Specifications

General

Brand	EVS
Model	XT Series
Category	Computer Hardware
Language	English