User`s guide

Dialogic
®
System Release 6.0 PCI for Windows
®
Release Update, Rev 62 — January 30, 2008 255
Dialogic Corporation
Supported Coders
These enhancements to the dx_reciottdata( ) function are supported for the following
encoding methods and sampling rates:
• OKI ADPCM, 6 kHz with 4-bit samples (24 kbps) and 8 kHz with 4-bit samples (32
kbps), VOX and WAVE file formats
• Linear PCM, 8 kHz sampling 64 Kbps (8 bits), 8 kHz sampling 128 Kbps (16 bits)
• G.711 PCM, 6 kHz with 8-bit samples (48 kbps) and 8 kHz with 8-bit samples (64
kbps) using A-law or mu-law coding, VOX and WAVE file formats
• G.721 at 8 kHz with 4-bit samples (32 kbps), VOX and WAVE file formats
• G.726 bit-exact voice coder at 8 kHz with 2-, 3-, 4-, or 5-bit samples (16, 24, 32, 40
kbps), VOX and WAVE file formats
1.72.2 Configuring the Software
Predefined sets of features for Dialogic
®
Boards are provided in media loads. A media
load consists of a configuration file set (PCD, FCD, and CONFIG files) and the associated
firmware that is downloaded to the board. See the Dialogic
®
DM3 Architecture PCI
Products on Windows
®
Configuration Guide for more information about media loads.
The initial silence compression and VAD event notification features are available in any
media load that has voice functionality.
To change the default value for the amount of allowable silence when using RM_ISCR,
you must add a new parameter in the CONFIG file that was selected for your board. The
parameter is 0x416, and must be added in the [encoder] section of the config file. The
initial silence value for the parameter is specified directly in seconds, for example:
[encoder]
SetParm=0x416,6
This sets the maximum amount of allowable silence to 6 seconds. Any initial silence
longer than that will be truncated.
Whenever a CONFIG file has been modified, a new FCD file must be generated. This
procedure is described in detail in the Dialogic
®
DM3 Architecture PCI Products on
Windows
®
Configuration Guide.
1.72.3 Documentation
The online bookshelf provided with Dialogic
®
System Release 6.0 PCI for Windows
®
contains information about all system release features including features for application
development, configuration, administration, and diagnostics.
For more information about the Dialogic
®
Voice API, see the following documents:
• Dialogic
®
Voice API Programming Guide