Method and apparatus for voice conferencing

An apparatus for a voice communication system, the apparatus comprising:

• at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the processor, cause the apparatus to at least:
• receive, at a mobile terminal, a reference signal associated with downlink audio to be reproduced by an audio transducer of the mobile terminal and one or more other reference signals associated with downlink audio to be reproduced by respective audio transducers of one or more other mobile terminals;
• process an echo signal from uplink audio due to the downlink audio reproduced by the audio transducer of the mobile terminal based upon the reference signal;
• and
• process an echo signal from uplink audio due to the downlink audio reproduced by the respective audio transducers of the one or more other mobile terminals based upon the one or more other reference signals so as to at least partially attenuate echo signals from the uplink audio due to the downlink audio reproduced by the respective audio transducers of the one or more other mobile terminals.

An apparatus for a voice communication system, the apparatus comprising:

• at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the processor, cause the apparatus to at least:
• generate downlink audio signals to be provided to a plurality of mobile terminals in conjunction with distributed voice conferencing;
• and
• cause a reference signal and one or more other reference signals to be provided to a respective mobile terminal with the reference signal associated with the downlink audio signals provided to the respective mobile terminal and the one or more other reference signals associated with the downlink audio signals provided to one or more other mobile terminals to permit acoustic echo control of uplink audio due to downlink audio reproduced by respective audio transducers of the one or more other mobile terminals.