The following table describes NCC.X.ADI_START.echocancel parameters:
NCC.X.ADI_START.echocancel |
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Dependent functions: nccStartProtocol |
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Field |
Type |
Default |
Units |
Description |
adapttime |
DWORD |
0 |
ms |
Echo canceller adaptation time for MODE=2. The valid AG and CG range is 100 to 1000. Smaller values require more DSP processing power. |
filterlength |
DWORD |
0 |
ms |
Filter length of echo canceller for MODE=2. Valid range is 2 to 20. Greater values require more DSP processing power. |
gain |
INT32 |
0 |
dB |
Amount of amplification applied to echo cancelled output. Valid range is -54 to 24. |
mode |
DWORD |
0 |
integer |
Controls echo canceller operation: A value can be formed by using the OR operator with any of the following bit masks or by using one of the specified constants: NCC_ECHOCANCEL_DEFAULT (1): Choose the default length and adapt time based on board type. (For AG 4000/C and AG 4040/C boards, the default is for no echo cancel.) For more information, see the Dialogic® NaturalAccess™ Alliance Device Interface API Developer's Manual. NCC_ECHOCANCEL_CUSTOM (2): Use specified length and adapt time. Default = 0: No echo cancellation. |
predelay |
DWORD |
0 |
ms |
Output sample delay. Valid range is 0 to 9. |