A novel algorithm is introduced for estimating the echo path responses for stereophonic acoustic echo cancellation. When the Wiener solution for the echo path responses is non-unique, the echo paths are estimated in two stages. In a first stage, one of the ...

2006

Robust Acoustic Echo Control Using a Simple Echo Path Model

Christophe Tournery, Christof Faller

In handsfree tele or video conferencing acoustic echoes arise due to the coupling between the loudspeaker and microphone. Usually an acoustic echo canceler (AEC) is used for eliminating the undesired echoes. The weaknesses of AEC are that it is relatively ...

2006

Improved Time Delay Analysis/Synthesis for Parametric Stereo Audio Coding

Christophe Tournery, Christof Faller

For parametric stereo and multi-channel audio coding, it has been proposed to use level difference, time difference, and coherence cues between audio channels to represent the perceptual spatial features of stereo and multi-channel audio signals. In practi ...

2006

Stereo Acoustic Echo Control Using A Simplified Echo Path Model

Christophe Tournery, Christof Faller

In handsfree tele- or video-communication, acoustic echoes arise due to the coupling between the loudspeakers and microphones. It is much more challenging to remove the undesired acoustic echoes for stereo or multi-channel tele-communication systems than f ...

2006

Perceived Audiovisual Quality of Low-Bitrate Multimedia Content

Stefan Winkler, Christof Faller

2006

Improved Cocktail Party Processing

Christof Faller

2006

Parametric Joint-Coding of Audio Sources

Christof Faller

2006

Suppressing acoustic echo in a sampled auditory envelope space

Christof Faller, Jun Chen

2005

Audiovisual Quality Evaluation of Low-Bitrate Video

Stefan Winkler, Christof Faller

2005

MPEG Spatial Audio Coding / MPEG Surround: Overview and Current Status

Christof Faller

2005

Modifying Stereo Recordings Using Acoustic Information Obtained with Spot Recordings

Christof Faller

2005

Pseudostereophony Revisited

Christof Faller

2005

The Reference Model Architecture for MPEG Spatial Audio Coding

Christof Faller

2005

Maximizing Audiovisual Quality at Low Bitrates

Stefan Winkler, Christof Faller

2005

Estimating the Delay and Coloration Effect of the Acoustic Echo Path for Low Complexity Echo Suppression

Christophe Tournery, Christof Faller

Acoustic echoes arise whenever there is acoustic coupling between a loudspeaker and a microphone. A traditional solution for eliminating the undesired echo signal is an acoustic echo canceler (AEC), which identifies the echo path between a loudspeaker and ...

2005

Head Related Transfer Functions Interpolation Considering Acoustics

Martin Vetterli, Luciano Sbaiz, Christof Faller, Thibaut Ajdler

We are proposing an interpolation technique for head related transfer functions (HRTFs). For deriving the algorithm we study the dual problem where sound is emitted from the listener’s ear and the generated sound field is recorded along a circular array of ...

2005

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