Method and apparatus for wideband conferencing

• US 8,582,520 B2
• Filed: 08/12/2011
• Issued: 11/12/2013
• Est. Priority Date: 12/31/2001
• Status: Expired due to Fees

• Current Assignee: Polycom Incorporated (Plantronics, Inc.)
• Original Assignee: Polycom Incorporated (Plantronics, Inc.)
• Inventors: Rodman, Jeffrey, Drell, David
• Primary Examiner(s): SMITH, CREIGHTON H
• Application Number:
  US13/209,038
• Publication Number:
  US 20110299674A1
• Time in Patent Office: 823 Days
• Field of Search: 379/202.01, 379/203.01, 379/204.01, 370/260, 709/204
• US Class Current: 370/329
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 3/567 Multimedia conference systems

Abstract

A method and apparatus for wideband voice and optional data conferencing over a telecommunications network channel between at least two wideband communications devices. An exemplary method comprises establishing an audio link, verifying wideband capability between the at least two wideband communications devices, training modems of the at least two wideband communications device to line conditions, and adjusting the telecommunications connection line conditions between the communications devices. Once a wideband connection has been established, audio and data may be simultaneously exchanged.

Claims

1. A method for wideband conferencing over a narrowband Plain Old Telephone System (POTS) connection from a first device, comprising:

opening one narrowband analog audio connection to a second device over a POTS connection;

receiving an indication that the second device is wideband capable;

transmitting a first wideband digital audio signal over the narrowband audio connection from the first device over a first voice channel;

transmitting a first control data signal over a first control channel;

receiving a second wideband digital audio signal from the second device over the first voice channel; and

receiving a second control data signal over the first control channel.

2. The method of claim 1, wherein the first and the second wideband digital audio signals have audio frequencies above 3.4 KHz.

3. The method of claim 1, further comprising sending an audio probe prior to receiving the indication that the second device is wideband capable.

4. The method of claim 1, further comprising sending a predetermined audio acknowledgement after receiving the indication that the second device is wideband capable.

5. The method of claim 1, further comprising adjusting quality of the connection based on available bandwidth.

6. The method of claim 5, wherein the adjusting further comprises modifying a setting of an audio codec in the first device.

7. The method of claim 5, wherein when the available bandwidth on the POTS connection is below a threshold, the communication between the first device and the second device reverts to analog narrowband audio communication.

8. The method of claim 1 further comprising utilizing audio echo cancellation in the first device to allow for full-duplex conversation.

9. The method of claim 1, wherein the first device comprises a wideband capable telephone.

10. The method of claim 1, wherein the first device comprises a personal computer.

20. A non-transitory computer readable medium having embodied thereon a program, the program being executable by a machine for wideband audio conferencing on a narrowband audio network to perform a method as in any one of claims 1-10.

11. A device capable of conducting a wideband conference over a narrowband analog Plain Old Telephone System (POTS) connection, comprising:

a codec;

a modem coupled to the codec and for coupling to the analog POTS connection; and

a controller coupled to the codec and the modem;

wherein the codec is operative to convert analog audio signals to wideband digital audio signals and wideband digital audio signals to analog audio signals;

wherein the controller is operative to receive an indication that a second communication device connected over the POTS connection is wideband capable;

wherein the modem is operative to modulate and demodulate digital signals exchanged through the POTS connection; and

wherein the controller and the modem are operative to establish a control channel for control data and a voice channel for the wideband digital audio signals.

12. The device of claim 11, wherein the controller is operative to send an audio wideband probe prior to receiving the indication that the second communication device is wideband capable.

13. The device of claim 11, wherein the controller is operative to send an audio wideband acknowledgement after receiving the indication that the second communication device is wideband capable.

14. The device of claim 11 where in the codec is a G.711 codec.

15. The device of claim 11 wherein the codec is a G.722.1 codec.

16. The device of claim 11 further comprising an audio echo canceller coupled to the codec to allow full-duplex audio communication.

17. The device of claim 11 wherein the audio communication has audio frequencies above 3.4 KHz.

18. The device of claim 11 wherein the controller is operative to adjust quality of connection based on available bandwidth.

19. The device of claim 18, wherein the controller is operative to switch the wideband digital audio communication to a narrowband analog audio communication when the available bandwidth drops below a threshold.