User`s guide

Dialogic
®
System Release 6.0 PCI for Windows
®
Release Update, Rev 62 — January 30, 2008 350
Dialogic Corporation
mode. This parameter should be documented in Section 6.4, [encoder] Parameters.
For information about this feature and the new parameter, see Section 1.72,
“dx_reciottdata( ) Enhancements”, on page 254 of this Release Update.
Update to Section 6.7, [0x3b] Parameters
Information about parameters 0x3b03 and 0x3b04 should be added to this section as
follows:
Note: This information is intended for experienced users of the Dialogic
®
DM3
conferencing feature. Changing the default parameter settings is not
recommended, as this could introduce negative effects on the audio quality
and conferencing experience of the participants.
CSUMS_ActTalkerPartiesMinNum
Number: 0x3b03
Description: Specifies the number of talkers in a conference before Active Talker mode is
enabled.
Note: Conference Active Talker mode, though related, should not be confused with the Active Talker
detection feature.
Values: 0 [default] to 0xff (255).
Guidelines: Refer to the guidelines for the CSUMS_SmartScalingPartiesMinNum parameter
below.
CSUMS_SmartScalingPartiesMinNum
Number: 0x3b04
Description: Specifies the number of talkers in a conference before scaling mode is enabled.
Values: 0 [default] to 0xff (255).
Guidelines: Audio conferencing provides a mechanism for audio summation of two or more
parties in a conference. There are three possible summing modes, which are controlled by
CSUMS parameters 0x3b03 and 0x3b04 in the configuration file.
By default, both active talker and scaling are enabled. When parameters 0x3b03 and 0x3b04 are
both set to their default values of 0, the default summing mode is Active Talker Summation mode,
which sums the three loudest parties. This is advantageous in large conferences. Since only the
three loudest parties are summed, background noise is reduced. However, there may be times with
small conferences when a different summation mode is preferable, for example, with soft speakers
or when the energy is too low (as with analog lines). The other summation modes are:
• Smart scaling mode - the summation of all parties, but scaling is only done on the ones who
are talking.
• No scaling - pure summation, can be used if you want full voice energy in the conference.
The settings for parameters 0x3b03 and 0x3b04 determine the summing mode as shown in the
following table.