Speaker identification during telephone conferencing

1. A method for identifying a participant in a teleconference, the method comprising:

receiving audio signals generated by a currently speaking participant of a plurality of participants, the plurality of participants participating in the conference call at a first location;

identifying the currently speaking participant of the plurality of participants prior to transmitting the audio signals through a circuit-switched network; and

directly transmitting, from the first location, a signal indicating an identifier of the currently speaking participant to different participants at one or more different locations through the circuit-switched network.

2. The method of claim 1 further comprising:

storing an identifier of the currently speaking participant; and

transmitting the identifier of the participant to the participating location prior to transmitting the signal.

3. The method of claim 2 wherein identifying the currently speaking participant comprises reading a unique identifier for the currently speaking participant from a card.

4. The method of claim 2 wherein identifying the currently speaking participant comprises receiving a unique identifier entered with a keypad.

5. The method of claim 2 wherein identifying the currently speaking participant comprises recognizing a voice sample provided by the at least one participant.

6. The method of claim 2 further comprising:

storing a voiceprint for the currently speaking participant, wherein identifying the currently speaking participant comprises comparing speech from the currently speaking participant to the stored voiceprint.

7. The method of claim 1 further comprising:

receiving an identifier of a participant in the teleconference; and

storing the identifier in a list of participants.

8. The method of claim 1 wherein:

identifying the currently speaking participant comprises identifying a location of the participant; and

transmitting the signal including the identifier of the currently speaking participant comprises transmitting an identifier of the location.

9. The method of claim 1 further comprising:

receiving a signal including an indication of an identifier of a currently speaking participant in the teleconference;

accessing the identifier using the indication; and

displaying the accessed identifier of the speaking participant.

10. The method of claim 9 wherein accessing the identifier comprises accessing the identifier from a list of participants.

11. The method of claim 1 wherein identifying the currently speaking participant comprises:

comparing a live voice signal of the currently speaking participant to a set of stored voice signals;

identifying a stored voice signal from the set of stored voice signals that matches the live voice signal; and

accessing an indication of an identifier associated with the identified stored voice signal, wherein the indication is included in the transmitted signal.

12. The method of claim 1 wherein identifying the currently speaking participant comprises detecting an action performed by the currently speaking participant indicating that the currently speaking participant is speaking.

13. The method of claim 12 wherein the action includes pressing a button.

14. The method of claim 1 wherein identifying the currently speaking participant comprises detecting a period of uninterrupted speech by the participant.

15. The method of claim 1 further comprising:

detecting a period of silence from the participant;

determining that the participant has stopped speaking in response to the detected period of silence; and

transmitting a signal indicating that the participant has stopped speaking.

16. The method of claim 15 further comprising:

receiving a signal indicating that the participant has stopped speaking; and

removing the identifier of the participant from a display in response to the received signal indicating that the participant has stopped speaking.

17. The method of claim 1 wherein the signal is received by a central controller.

18. The method of claim 1 wherein the signal is received at the participating location.

19. A system for identifying a speaker participating in a conference call, the system comprising:

a voice recognition module operable to receive audio signals generated by a currently speaking participant of a plurality of participants and identify the currently speaking participant of the plurality of participants prior to transmitting the audio signals through a circuit-switched network, the plurality of participants participating in a teleconference at a first location; and

a communications module operable to directly send, from the first location, a signal indicating the speaking participant to different participants at one or more different locations, wherein:

the teleconference occurs over a circuit-switched connection, and

the signal is sent over the same circuit-switched connection used for voice communications in the teleconference.

20. The system of claim 19 further comprising a display operable to display an identifier of the speaking participant in the teleconference.

21. The system of claim 19 further comprising a memory operable to store an identifier of the speaking participant, wherein the signal includes an indication of the stored identifier.

22. The system of claim 21 wherein:

the speaking participant is one of multiple participants at a participating location;

the memory stores identifiers of the multiple participants;

the communications module is operable to receive identifiers of participants at other locations to be stored by the memory; and

the communications module is operable to transmit the identifiers of the multiple participants.

23. The system of claim 21 wherein:

the memory is operable to store a voiceprint of the speaking participant in the teleconference; and

the voice recognition module is operable to compare the stored voiceprint with a live voice signal from the speaking participant to determine if the participant corresponding to the stored voiceprint is speaking.

24. The system of claim 19 wherein the communications module is operable to receive a signal that an individual at another location is speaking, the system further comprising a display operable to display an identity of the location at which the individual is speaking.

25. The system of claim 19 further comprising a card reader operable to read information stored on a card that identifies the participant in the teleconference.

26. The system of claim 19 further comprising a keypad operable to receive a code that uniquely identifies the participant in the teleconference.

27. The system of claim 19 further comprising a button operable, when pressed to indicate to the voice recognition module that the participant is speaking.