Harmonic ProView PVR 6000 Series User Manual page 120

B
ITRATE
This parameter defines the output stream as VBR or CBR. All NULL packets are
removed at the input.
•
•
B
ITRATE
This parameter allows setting the output bitrate limit.
The available values range is 0.500000 to 72.000000 (Mbs).
N
OTES
• When using VBR mode, a Bitrate limit must be defined.
• In order to prevent system overflow it is highly recommended to use a bit-
rate value which is 25% higher then the desired bit-rate. In case of system
overflowing, the IRD provides an error trap
• PSI/SI tables are NOT regenerated - Tables can be dropped (for example, in
service mode, PMTs of the filtered services are automatically dropped).
However, tables are not modified (for example, in service mode, the PAT
includes all original services, including those which were dropped)
Page 4-50
M
ODE
VBR - allows variable output stream bit-rate. The IRD drops all unneeded
services and PIDs according to the user selection. NULL packets are filtered
at the input, and excluded from the output.
CBR – allows constant output stream bit-rate; the bitrate is configured by
the user. IRD drops all unneeded services and PIDs. NULL packets are
dropped at the input; however, NULL packets are inserted at the output to
meet the configured bit rate. The minimum configured bit rate should be 25
percents more then the selected services or PIDs accumulated maximum bit
rate. This is due to momentarily burstiness scenario. In case that an
overflow occurs, the following alarm Filtering CBR Bit-rate is too Low is
turned on (if the alarm is not masked, a trap is generated).
User Manual
Operation and Management
(Rev. 4.1/ SW v1.60/ December 2006)