Annuncicom IC User Manual Version 01.20
Page
9
7.4
Streaming settings
These settings adjust the streaming mode, parameters and
destinations.
Own Name
You can enter the name of the Annuncicom IC here. This
name will be returned when using the DISCOVER
command (see technical documentation)
Streaming mode
"send always" will stream always
"send on TALK/CTS" will stream if the TALK button
(command) is pressed or CTS (Pin 8 Serial connector) is
connected to a positive supply like 9VDC (Pin 4 Serial
connector), see section I/O settings on how to configure
CTS behavior
"send on Level" will stream if the incoming audio signal is
above the Trigger level
"auto answer" will stream back for the Post Trigger Play
duration after a stream has been received
"receive only" can receive a stream but will never send one
Trigger level
Is only used when Streaming mode is
"on Level".
Set to a value between 0 and 32767.
Open the device status page and look for the Input peak
value to get a hint for the trigger value. This page refreshes
itself every second.
Pre Trigger Start
Pre Trigger Start can be adjusted to prevent cut offs when
audio should be sent earlier than detected. It defines the
amount of time that will be streamed before the actual
trigger occurred. This feature is most likely used in
combination with the send on level feature.
Post Trigger Play
Post Trigger Play can be adjusted to prevent cut offs when
audio should be sent longer than detected. It defines the
amount of time that the device will continue streaming
after the actual trigger has been cleared. This feature is
most likey used with the send on level feature.
When Streaming mode is set to
"auto answer" this defines
the duration the device will stream back after a stream has
been received.
Buffer Underrun Mode (TCP)
The Buffer Underrun Mode (TCP) defines the action if a
TCP stream is slower than the real stream from the
encoder. In this case the output streaming buffer underruns
and cannot hold older data anymore. The device can then
"disconnect" the TCP connection or it can "skip" the
stream directly to the encoder stream without
disconnecting TCP.
Background Stream TCP Flow Control
This defines the behaviour of the receiving TCP stream
when interrupted by a priority message. When set to
"throw away data" the received stream will be disregarded
and continues with new data after the priority message has
ended. Use this setting when receiving from a real-time
encoder such as the Barix Annuncicom. When receiving
from a pre-recorded streaming application (background
music / information broadcasting) the setting should be
changed to
"stop stream" to prevent loss of
music/information.
Streaming Packet Strategy (MP3 only)
The Streaming Strategy defines how a MP3 packet is built
and sent. On
"lowest latency" the encoded data will be sent
directly after the encoding. On
"optimal package" the
packet will be filled up before sending.
Non MP3 Packet Size
Defines the size of a non MP3 packet (G.711/PCM) sent by
the device. The smaller the packet size the smaller the
audio delay between sending and receiving device but more
network packets are sent. Increase the packet size when
