
original content and signal, and the quality of the decoder and monitor. As a general rule, use the lowest video rate that best suits the application.
The following information represents guidelines for product configuration limitations, with regard to specific unit types. When configuring VBrick units, close attention must be paid to the total transport rate of all sources both entering and exiting the unit. In most cases the sum of all entering and exiting
MPEG-2 Configuration Recommendations
•Maintain video rates at optimum levels. High rates do improve quality. VBrick recommends rates that use the lowest possible rate which gives acceptable quality. For
•Avoid setting the transport rate manually. Use the automatic transport rate calculation mode (default operation).
•The maximum
•When using the hard drive, especially for recording, keep other device functions to a minimum to avoid discontinuities in the recorded content.
•Recording high video rate streams consumes hard drive space and limits the recording duration significantly. Additionally, high video rate streams require faster hard drive access times and are more prone to video dropouts.
•Periodic
•Hard drive pump and record functions are designed to be mutually exclusive. When operating at medium to low rates it may be possible for the hard drive to pump and record simultaneously but it is not recommended.
•Encoding from and sending to multiple destinations consumes additional system resources. Furthermore, a 4300 VBrick unit with dual encoders is capable of sending 4 streams but will not be able to sustain operation at the highest transport rates.
•Increasing the IP video packet size improves overall performance both in Ethernet Mode. Please check with your network administrator first before deciding on what size is best for your network.
Absolute Maximum Transport Rates
This table provides the absolute maximum transport rates for given configurations.
Table 3. Maximum Transport Rate by Configuration
Model | Dest1, Dest2 | Decoder | Recorder | FTP Active | Player / |
| Slot #1 | Slot#2 |
|
| Pump |
|
|
|
|
|
|
6200 | 17,0 | 17 | 0 | No | 0 |
|
|
|
|
|
|
VBrick | 7 |