Operation Manual

 Stream Name: All B264 input and output ports can be assigned a user-defined name.

This name is used to identify the stream later when making connections. Use any

descriptive name suitable for your application, or accept the default.

 RTP: If this box is checked, the B264 will include RTP (Real Time Protocol) headers in

the output flow. If it is not checked, the transport stream will be sent over UDP/IP

without any additional headers. Note that RTP requires the use of even UDP port

numbers; when this box is checked, the user interface will enforce this restriction. The

B264 will not generate RTCP packets.

 SMPTE 2022 FEC: The B264 supports SMPTE 2022 FEC in one stream per Ethernet

interface. If no streams are currently configured for SMPTE 2022 FEC, this box will be

displayed. If it is not displayed, then another stream is already using the feature. Check

this box to enable transmission of SMPTE 2022 FEC packets for this stream. Note that

SMPTE 2022 requires the use of RTP; checking this box will cause the RTP box to be

checked as well. See SMPTE 2022 FEC Support section later in this document for a

detailed description of the FEC configuration.

 NULL Padding: This setting controls whether or not NULL packets are transmitted,

making the stream completely CBR. IP networks are inherently VBR, and do not require

NULL packets (which carry no information). However, the decoders may need them.

The following is a good set of rules for deciding whether or not to send NULL packets:

o If all your decoders are consumer IP set-top boxes or PCs running software

decoders, NULL packets can be disabled.

o If your decoders include professional IRDs, NULL packets must be enabled. The

great majority of professional IRDs will not work without them.

o If you are generating an MPTS (routing both encoders to the stream), enable

NULL packets. An MPTS without NULL packets is technically illegal as per

ISO/IEC 13818-1, but some systems support it.

o If you are not sure about what kind of decoder will be receiving the stream, enable

NULL packets.

This control offers the following options:

o Disabled: NULL packets are disabled and will not be transmitted. This will

cause the stream to be somewhat VBR, even if the encoder is set to CBR mode.

o Enabled – Automatic Rate: This setting enables NULL packets, but the bit rate

is automatically set by the B264 to the minimum suitable value. This is the

recommended setting. If you later reconfigure an encoder connected to this

stream, the rate will be automatically adjusted.

o Enabled – Manual Rate: This setting allows you to specify the overall stream bit

rate. If you specify the bit rate, it must be high enough to support the connected

encoders (i.e., it must be at least equal to the sum of the encoder Transport Rate,

found in each encoder Status tab). Specifying a rate that is not high enough will

cause the IP Output to drop packets. Note that if this option is selected, the IP

Output will be transmitting continuously at the selected bit rate, regardless of

connections or the state of the encoders. If there is no connection to the IP Output,

it will transmit only NULL packets; if there are connections and the encoders are

stopped, it will transmit NULL packets plus (P)SI tables.

If the Advanced View is selected, three more parameters are available for configuration: