
Acoustic Echo is caused by direct and indirect feedback from speaker to microphone.
The Adaptive Digital patented acoustic echo canceller .pdf
,
electronically removes both direct coupling and reflected echo, enabling
true full-duplex hands-free telephony for both mobile phones and desktop
speakerphones.
By using Adaptive Digital’s acoustic echo canceller to eliminate this unwanted echo and reverberating interference, echo-free conversation can be achieved.

Howling Prevention
Adapts quickly to changing echo path
Multiple channel operation
Parameters are user configurable
Non-linear processor
Comfort Noise Generator
Noise Suppression
Fast Convergence
No divergence due to doubletalk
Convergence monitor
Functions are C-callable
ADT G.168-2004 is available on the TMS320™ DSP Family
C54x™DSP, C55x™DSP, & C64x™DSP Generations
All Memory usage is given in units of 16-bit word.
Tail Length |
MIPS* |
Program Memory |
Data Memory** |
Per-Channel Data Memory*** |
32 msec |
9.8 |
4746 |
1700 |
1924 |
64 msec |
12.4 |
4746 |
2260 |
2356 |
Last update: 01/17/2005
All Memory usage is given in units of byte.
Tail Length |
MIPS * |
Program Memory |
Data Memory** |
Per-Channel Data Memory*** |
32 msec |
7.8 |
9538 |
3400 |
3848 |
64 msec |
8.6 |
9538 |
4520 |
4712 |
Last update: 04/13/2005
All Memory usage is given in units of byte.
Tail Length |
MIPS* |
Program Memory |
Data Memory** |
Per-Channel Data Memory*** |
32 msec |
5.0 |
15530 |
3400 |
3848 |
64 msec |
6.5 |
15530 |
4520 |
4712 |
Last update: 02/25/2005
All Memory usage is given in units of byte.
Tail Length |
MIPS * |
Program Memory |
Data Memory** |
Per-Channel Data Memory*** |
32 msec |
26.6 |
15944 |
3372 |
4112 |
64 msec |
35.9 |
15944 |
4492 |
4976 |
Last update: 04/29/2008
* MIPS may vary depend on the AEC’s configuration setup by users
** Data Memory includes const table memory and scratch memory
*** Per-Channel Memory includes AEC’s Channel and static-allocated state memory for each channel.
AEC_ADT_aecInit(…) Initializes echo canceller channel
AEC_ADT_aecCancel(…) Executes cancellation function
SITE LINKS
ECHO CANCELLER ![]()
RELATED LINKS
PRODUCT INDEX .pdf INDEX WHITE PAPERS VOIP PHONE REFERENCE KIT G.PAK FRAMEWORK OPEN G.PAK SOLUTION DSP RESOURCE WIZARD
Adaptive Digital's echo canceller is a robust, carrier class, flexible software solution that is available across a wide variety of DSP platforms.