Cisco D9054 Installation And Operation Manual page 111

Setting Up the Statistical Multiplexing Encoding Rate,
3. Set the Default video Rate for the Elemental Stream (ES).
The legal range is from 3 to 20 Mbit/s for Main Profile encoding and 3 to 25
Mbit/s for High Profile encoding. The default video rate is the service's
contribution to the statmux pool when the D9054 HD Encoder participates in
statistical multiplexing. During statistical multiplex operation, each D9054 HD
Encoder that participates in statistical multiplexing will be granted capacity
from the statmux pool. The sum of the default video rates for the active statmux
channels equals the size of the statmux bit rate pool.
The total rate of the statmux channels will not go beyond the statmux pool size,
but may go lower depending on the input video complexity.
The default video rate determines the encoding rate at which the encoder starts
after power-up. Also, it determines the rate the encoder settles to during
communication errors between the encoders in the statmux pool, or when the
encoder is disconnected.
For further information on setting up the default video rates, see Determining
the Default Video Rate, page 5-29.
4. If relevant, set the Minimum video Rate for the Elemental Stream (ES).
The legal range is from 0.5 to 20 Mbit/s for Main Profile encoding and 0.5 to 25
Mbit/s for High Profile encoding. The default rate is 1 Mbit/s. The
instantaneous rate during statmux operation will not go below the stated
minimum video rate. The instantaneous rate may be higher than the stated
minimum video rate if so determined by the rate algorithm.
5. Set the Priority.
The priority setting determines how to weight the video quality of a channel
compared to the other channels in the statmux pool. There is a total of 16 values
from 0 to 15. You are also allowed to give different channels the same priority. If
all channels are equally important, the priority setting should be the same for all
channels. The standard setting for all channels is 8. We recommend that you
leave the priority setting at the standard setting unless you want to prioritize
your statmux channels differently.
6. Set the Latency, i.e., video delay.
Delay
Short
Normal
Extended
4038938 Rev A
Explanation
Represents a HRD (Hypothetical Reference
Decoder) delay of 1250 ms.
Represents a HRD delay of 1500 ms.
Represents a HRD delay of 1750 ms.
D9054 HDTV Encoder Intstallation and Operation Guide
Continued
5-27