High Quality Audio Conferencing With Adaptive Beamforming

One or more circuits for use in a teleconferencing device, the one or more circuits comprising:

• at least one processor operably coupled to a plurality of conference stations each comprising a directional microphone, the plurality of directional microphones collectively producing a plurality of microphone signals, the at least one processor, during operation, at least,
• receiving a first electrical signal representative of sound,
• processing at least one of the plurality of microphone signals and the first electrical signal, to produce a second electrical signal, and
• transmitting the second electrical signal.

One or more circuits for use in an audio conferencing system, the one or more circuits comprising:

• at least one processor operatively coupled to receive a plurality of microphone signals, the at least one processor, during operation, at least,
• selecting at least two groups of microphone signals from the plurality of microphone signals;
• processing each of the at least two groups of microphone signals using an adaptive beamforming technique, the processing producing an output signal for each of the at least two groups of microphone signals;
• and
• combining the output signals.

At least one processor for use in an audio conferencing system, the at least one processor comprising:

• output circuitry for outputting a first electrical signal representative of sound;
• input circuitry for receiving signals representative of sound from a plurality of directional microphones disposed in a corresponding plurality of conference stations arranged in spaced relation, each of the plurality of directional microphones converting sound into a directional microphone signal, the directional microphone signals collectively forming a plurality of directional microphone signals;
• and
• wherein the at least one processor modifies at least one of the plurality of directional microphone signals and a receive signal to produce at least one of a transmit signal and the first electrical signal.