GUIDE TO INSTALLATION AND OPERATION
8
| ASI-Bridge CAM
4 Special Features and Notes
Sony HDV cameras:
In case of use with a Sony HDV camera that output a VBR stream without NULL packets, the ASI-Bridge
CAM performs the following processes:
•
add the NULL packets to have a CBR 27Mbps stream.
•
Distribute the packets evenly in time to output the stream at 27Mbps CBR
•
Corrects the PCR packets timing information.
All other cameras:
In case of use with a Canon 1080i camera, or JVC 720p cameras, the ASI-Bridge CAM does not perform any
special processes.
DVHS, STB, PVR:
A Firmware modification has been made to be able to support STB (Set-Top Box) and STB/PVR (Personal
Video Recorder).
Be aware, though, that the STB outputs one program from the TS that can contain several programs in real
time without a buffer, and the packets are not re-distributed evenly in time. So in this case check that the
end-point equipment (example: decoder) is able to take such a ‘VBR like’ stream.
If the program has been recorded on the hard drive of a PVR, then the PVR will output it with a better
distribution of the packets in time.
General:
The ASI-Bridge CAM is able to take any TS whose bit rate is from 500Kbps to 85Mbps (tested).
The unit can even take transport streams whose bit rates are up to 200 Mbps if you are using a Firewire 200
or 400 Mbps. This has not been tested.
Glossary:
STB.
Set-Top Box – a Digital TV receiver.
PVR.
Personal Video Recorder
TS.
Transport Stream – a stream that can contain one or several programs.
PCR.
Program Clock Reference – time stamp in the TS that is used to synchronize the decoder’s clock
to the clock of the TS source.
VBR.
Variable Bit Rate
CBR.
Constant Bit Rate
DVHS.
Digital Video Home System
