Estimation method and apparatus

Fast converging affine projection based echo canceller for...

Flash-cut of speech processing features in a telephone call

Frequency domain stereophonic acoustic echo canceller...

Full duplex echo cancelling circuit

Full duplex telephone set using echo cancellation and side...

Full-duplex communication device and method of acoustic echo...

Gain control method for acoustic echo cancellation and...

Gauging convergence of adaptive filters

Hands-free telephone set

Heusristics for optimum beta factor and filter order...

High performance echo canceller for high speed modem

Howling controller

Howling suppression device and howling suppression method

Hybrid balance and combination codec filter circuit

Hybrid echo canceller

Hybrid echo canceller controllers

Impulse response setting method for the 2-channel echo...

Integrated circuit for telephone set with signal envelope detect

Integrated noise cancellation and residual echo suppression