GAO's G.167 Acoustic Echo Cancellation Software (AEC software) is an acoustic echo canceller that eliminates one of the biggest problems with hands-free speaker phones: acoustical echoes.
The memory and MIPS requirements of an acoustical echo canceller depend on the maximum duration of all possible echoes. The longer the duration of an echo the more MIPS and memory required to resolve the problem. Echo with a duration of 80 ms may be generated by a room with 4 meters by 4 meters of hard wall.
Features of G.167 Acoustic Echo Cancellation Software (AEC)
Fully complies with ITU-T G.167 standard
Implemented in assembly or C
Low data memory, program memory, and computational requirements
Robust double-talk detection
High-performance full duplex operation
High signal to noise ratio
Robust design delivers consistent results
Automatic Gain Control
Cancels echo tail length of 16, 32, 64, 128 and 256 ms