Apparatus, method, and computer program for processing audio information of a communication session

• US 7,606,181 B1
• Filed: 06/30/2003
• Issued: 10/20/2009
• Est. Priority Date: 06/30/2003
• Status: Expired due to Fees

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: DeFrain, Paul D., Whynot, Stephen R.
• Primary Examiner(s): Harper, Kevin C
• Application Number:
  US10/610,508
• Time in Patent Office: 2,304 Days
• Field of Search: 370/260, 370/263, 370/266, 379/202.01
• US Class Current: 370/260
• CPC Class Codes: H04L 65/403 Arrangements for multi-party communication, e.g. for conferences data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15
• CPC Class Codes: H04L 65/765 intermediate

Abstract

An apparatus, method, and computer program process audio information in a communication system. The apparatus, method, and computer program identify one or more silent channels of a communication session. The apparatus, method, and computer program also mix audio information from two or more non-silent channels. The mixed audio information is provided to one or more of the channels of the communication session.

Claims

1. A method for processing audio information of a communication session, comprising:

receiving through at least one port a plurality of channels having audio information of a communication session;

identifying one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mixing the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

delivering through the at least one port to the plurality of channels of the communication session the mixed audio information;

and wherein identifying one or more silent channels comprises;

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

2. The method of claim 1, further comprising:

determining that two of the channels in the communication session will exchange audio information with one another;

determining whether the two channels use a common CODEC; and

exchanging the audio information between the two channels without decompressing or compressing the audio information when the two channels use the common CODEC.

3. The method of claim 1, wherein delivering the mixed audio information comprises:

generating a list of one or more CODECs used by the one or more channels who receive the mixed audio information;

compressing the mixed audio information using each unique CODEC contained in the list to produce one or more compressed versions of the mixed audio information; and

communicating each of the one or more compressed versions of the mixed audio information to one or more of the channels.

4. A method for processing audio information of a communication session, comprising:

receiving through at least one port a plurality of channels having audio information of a communication session;

identifying one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mixing the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

delivering through the at least one port to the plurality of channels of the communication session the mixed audio information;

compressing at least one of an announcement and a prompt using one or more CODECs;

storing the at least one compressed announcement and prompt;

retrieving and streaming the at least one compressed announcement and prompt to one or more of the channels during the communication session;

and wherein identifying one or more silent channels comprises;

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

5. The method of claim 4, wherein storing the at least one compressed announcement and prompt comprises storing the at least one compressed announcement and prompt on a disk;

and

further comprising storing the at least one compressed announcement and prompt in a local memory.

6. The method of claim 5, wherein storing the at least one compressed announcement and prompt in the local memory comprises storing the at least one compressed announcement and prompt in the local memory when usage of the at least one compressed announcement and prompt stored on the disk exceeds a threshold.

19. The method of claim 4, wherein delivering the mixed audio information comprises:

generating a list of one or more CODECs used by the one or more channels who receive the mixed audio information;

compressing the mixed audio information using each unique CODEC contained in the list to produce one or more compressed versions of the mixed audio information; and

communicating each of the one or more compressed versions of the mixed audio information to one or more of the channels.

7. An apparatus for processing audio information of a communication session, comprising:

a plurality of ports operable to facilitate communication with a plurality of communication devices; and

a processor operable to;

receive through at least one of the ports a plurality of channels having audio information of a communication session;

identify one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mix the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

deliver through the at least one port to the plurality of channels of the communication session the mixed audio information;

and wherein the processor is operable to identify one or more silent channels by;

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

8. The apparatus of claim 7, wherein the processor is further operable to:

determine that two of the channels in the communication session will exchange audio information with one another;

determine whether the two channels use a common CODEC; and

exchange the audio information between the two channels without decompressing or compressing the audio information when the two channels use the common CODEC.

9. The apparatus of claim 7, wherein the processor is operable to deliver the mixed audio information by:

generating a list of one or more CODECs used by the one or more channels who receive the mixed audio information;

compressing the mixed audio information using each unique CODEC contained in the list to produce one or more compressed versions of the mixed audio information; and

communicating each of the one or more compressed versions of the mixed audio information to one or more of the channels.

10. An apparatus for processing audio information of a communication session, comprising:

a plurality of ports operable to facilitate communication with a plurality of communication devices; and

a processor operable to;

receive through at least one of the ports a plurality of channels having audio information of a communication session;

identify one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mix the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

deliver through the at least one port to the plurality of channels of the communication session the mixed audio information;

compress at least one of an announcement and a prompt using one or more CODECs;

store the at least one compressed announcement and prompt;

retrieve and streaming the at least one compressed announcement and prompt to one or more of the channels during the communication session;

and wherein identify one or more silent channels comprises;

identify any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determine a noise floor, and

identify any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

11. The apparatus of claim 10, wherein:

the processor is operable to store the at least one compressed announcement and prompt on a disk; and

the processor is further operable to store the at least one compressed announcement and prompt in a local memory.

12. The apparatus of claim 11, wherein the processor is operable to store the at least one compressed announcement and prompt in the local memory when usage of the at least one compressed announcement and prompt stored on the disk exceeds a threshold.

13. A computer program embodied on a computer readable medium and operable to be executed by a processor, the computer program comprising computer readable program code for:

receiving through at least one port a plurality of channels having audio information of a communication session;

identifying one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mixing the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

delivering through the at least one port to the plurality of channels of the communication session the mixed audio information;

and wherein identifying one or more silent channels comprises;

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

14. The computer program of claim 13, wherein the computer readable program code further comprises computer readable program code for:

determining that two of the channels in the communication session will exchange audio information with one another;

determining whether the two channels use a common CODEC; and

exchanging the audio information between the two channels without decompressing or compressing the audio information when the two channels use the common CODEC.

15. The computer program of claim 13, wherein the computer readable program code for delivering the mixed audio information comprises computer readable program code for:

generating a list of one or more CODECs used by the one or more channels who receive the mixed audio information;

compressing the mixed audio information using each unique CODEC contained in the list to produce one or more compressed versions of the mixed audio information; and

communicating each of the one or more compressed versions of the mixed audio information to one or more of the channels.

16. A computer program embodied on a computer readable medium and operable to be executed by a processor, the computer program comprising computer readable program code for:

receiving through at least one port a plurality of channels having audio information of a communication session;

identifying one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels;

mixing the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels;

delivering through the at least one port to the plurality of channels of the communication session the mixed audio information;

compressing at least one of an announcement and a prompt using one or more CODECs;

storing the at least one compressed announcement and prompt;

retrieving and streaming the at least one compressed announcement and prompt to one or more of the channels during the communication session;

and wherein identifying one or more silent channels comprises;

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel.

17. The computer program of claim 16, wherein:

the computer readable program code for storing the at least one compressed announcement and prompt is operable to store the at least one compressed announcement and prompt on a disk; and

the computer program further comprises computer readable program code for storing the at least one compressed announcement and prompt in a local memory when usage of the at least one compressed announcement and prompt stored on the disk exceeds a threshold.

18. An apparatus for processing audio information of a communication session, comprising:

a plurality of ports operable to facilitate communication with a plurality of communication devices; and

a processor operable to;

receive through at least one of the ports a plurality of channels having audio information of a communication session;

identify one or more of the plurality of channels as silent channels, wherein the remaining channels of the plurality of channels are non-silent channels, by

identifying any channel of the plurality of channels with audio information having a signal energy level below a threshold as being a silent channel,

for each channel of the plurality of channels having audio information with a signal energy level above the threshold, determining a noise floor, wherein the noise floor is above the threshold, and

identifying any channel of the plurality of channels having a determined noise floor and having audio information with a signal energy level below the determined noise floor as being a silent channel;

mix the audio information of the non-silent channels when there are at least two non-silent channels of the plurality of channels; and

deliver through the at least one port to the plurality of channels of the communication session the mixed audio information.