METHOD AND SYSTEM FOR HANDLING CONTENT IN VIDEOCONFERENCING

• US 20140225982A1
• Filed: 02/06/2014
• Published: 08/14/2014
• Est. Priority Date: 02/11/2013
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Polycom Incorporated (Plantronics, Inc.)
• Inventors: Leviav, Eyal, Avni, Uri, Klein, Alon, Shnaps, Danny, Bourshan, Yoella, Reiter, Noa
• Granted Patent: US 9,369,671 B2
• Time in Patent Office: Days
• US Class Current: 348/14.09
• 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 65/756 adapting media to device capabilities
• CPC Class Codes: H04L 65/765 intermediate
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

A technique allows delivering content in a videoconference among a plurality of conferees in multiple quality levels. Content distributed from a multipoint control unit that is connected to an endpoint that delivers the content to receiving endpoints may have two or more quality levels. The quality level can be adapted to the capabilities of the receiving endpoints and the current quality of the connection that is used to deliver the content toward the receiving endpoints. The quality level associated with an endpoint may change during a session dynamically, adapting the delivery mode to changes in the condition of the connection between the receiving endpoints and the multipoint control unit.

Claims

1. A method for distributing content received from a content delivery endpoint in a multipoint multimedia conference, comprising:

identifying capabilities of a first receiving endpoint;

identifying a quality of a connection that carries the content from a multipoint control unit toward the first receiving endpoint;

associating at the multipoint control unit, based on the identified capabilities and quality, content delivery resources for distributing the content toward the first receiving endpoint, wherein the content delivery resources associated with the first receiving endpoint differ from content delivery resources associated with a second receiving endpoint; and

transferring the content toward the plurality of receiving endpoints via the associated content delivery resources.

2. The method of claim 1,

wherein identifying capabilities of a first receiving endpoint comprises identifying capabilities of each of a plurality of receiving endpoints,

wherein identifying a quality of a connection comprises identifying the quality of a connection that carries the content toward each of the plurality of receiving endpoints,

wherein associating comprises associating at the multipoint control unit, based on the identified capabilities and quality, content delivery resources for distributing the content toward each receiving endpoint of the plurality of receiving endpoints, and

wherein the first receiving endpoint and the second receiving endpoint are receiving endpoints of the plurality of receiving endpoints.

3. The method of claim 1, wherein the content is distributed as compressed video.

4. The method of claim 1, where in the associated content delivery resources comprises at least one resource selected from a group consisting of a network interface, a video decoder, a video encoder and a continuous presence video module.

5. The method of claim 1, wherein identifying capabilities comprises exchanging capability information between the multipoint control unit and the first receiving endpoint as part of establishing the connection.

6. The method of claim 1, further comprising:

associating a quality level with the first receiving endpoint corresponding to the identified capabilities and quality of the connection,

wherein associating content delivery resources comprises associating content delivery resources with the first receiving endpoint corresponding to the associated quality level.

7. The method of claim 1, wherein the first receiving endpoint is associated with a first quality level if the identified capabilities of the first receiving endpoint comprise a capability to decode compressed content received from the content delivery endpoint and the connection is identified as a high quality connection.

8. The method of claim 7,

wherein associating, at the multipoint control unit, content delivery resources to a second receiving endpoint not associated with the first quality level comprises:

allocating, at the multipoint control unit, content delivery resources for distributing the content toward the second receiving endpoint;

associating a video decoder for decoding the content received from the content delivery endpoint and producing decoded content; and

associating a video encoder for compressing the decoded content into a second compressed content; and

associating a second network interface,

wherein transferring the content toward the second receiving endpoint not associated with the first quality level comprises transferring the second compressed content via the second network interface.

9. The method of claim 8, further comprising:

monitoring, during the conference, the quality of the connection associated with the first receiving endpoint; and

switching an input to the network interface that is associated with the first receiving endpoint between received frames of compressed content and frames of the second compressed content responsive to the monitoring.

10. The method of claim 9, further comprising:

repeating, from time to time, the monitoring; and

switching in response to detecting an improvement in the quality of the connection associated with the first receiving endpoint, the input to the network interface that is associated with the first receiving endpoint, between frames of second compressed content and the received frames of compressed content.

11. The method of claim 7, wherein the multipoint control unit initially assumes that the first receiving endpoint is associated with the first quality level.

12. The method of claim 7, wherein associating content delivery resources to the first receiving endpoint associated with the first quality level comprises associating a network interface with the first level receiving endpoint at the multipoint control unit, for distributing the content received from the content delivery endpoint compressed as it was received toward the first receiving endpoint.

13. The method of claim 1, wherein the second receiving endpoint is associated with a second quality level if the second receiving endpoint requires different compression parameters than the compression parameters used by the content delivery endpoint and the connection toward the second receiving endpoint is identified as a high quality connection.

14. The method of claim 13,

wherein associating content delivery resources to the second receiving endpoint associated with the second quality level comprises:

allocating to the second receiving endpoint a video decoder for decoding content compressed at a first compression level received from the content delivery endpoint, producing decoded content;

associating a first video encoder with the second receiving endpoint;

compressing the decoded content with the first video encoder, producing a compressed content compressed at a second compression level; and

associating a network interface with the second receiving endpoint, the network interface configured to obtain the content compressed at the second compression level; and

wherein transmitting comprises transmitting by the network interface the content compressed at the second compression level toward the second receiving endpoint.

15. The method of claim 1, wherein the second receiving endpoint is associated with a third quality level if the first receiving endpoint requires different compression parameters than the compression parameters used by the content delivery endpoint and the connection toward the first receiving endpoint is identified as medium quality connection.

16. The method of claim 15,

wherein associating content delivery resources to the second receiving endpoint associated with the third quality level comprises:

allocating to the second receiving endpoint a video decoder for decoding content compressed at a first compression level received from the content delivery endpoint, producing decoded content;

associating a first video encoder with the second receiving endpoint;

compressing the decoded content with the first video encoder, producing a compressed content compressed at a second compression level; and

associating a network interface with the second receiving endpoint, the network interface configured to obtain the content compressed at the second compression level; and

wherein transmitting comprises transmitting by the network interface the content compressed at the second compression level toward the second receiving endpoint.

17. The method of claim 1, wherein the second receiving endpoint is associated with a fourth quality level if the second receiving endpoint cannot process the content as a content stream.

18. The method of claim 17,

wherein associating content delivery resources to the second receiving endpoint associated with the fourth quality level comprises:

associating with the second receiving endpoint a video decoder for decoding content compressed at a first compression level received from the content delivery endpoint, producing decoded content, and

wherein transmitting comprises transferring the decoded content toward a continuous presence video module that is associated with the second receiving endpoint.

19. The method of claim 1, further comprising identifying a quality of a connection that carries the content from the multipoint control unit toward a cascading multipoint control unit.

20. The method of claim 19, further comprising:

associating the cascading multipoint control unit with a first quality level if the connection toward the cascading multipoint control unit is a high quality connection; and

associating the cascading multipoint control unit with a second quality level if the connection toward the cascading multipoint control unit is medium quality connection.

21. The method of claim 20, wherein associating content delivery resources comprises associating a second network interface with the cascading multipoint control unit if the cascading multipoint control unit is associated with the first quality level.

22. The method of claim 20,

wherein the cascading multipoint control unit is associated with the second quality level, and

wherein associating at the multipoint control unit content delivery resources comprises:

associating, at the multipoint control unit, content delivery resources for distributing the content toward the cascading multipoint control unit a video decoder for decoding content compressed at a first compression level received from the content delivery endpoint, for producing decoded content;

associating a first video encoder with the cascading multipoint control unit;

compressing the decoded content with the first video encoder, producing a compressed content compressed at a second compression level; and

associating a third network interface with the cascading multipoint control unit, the third network interface configured to obtain the content compressed at the second compression level; and

wherein transmitting comprises transmitting by the third network interface the content compressed at the second compression level toward the cascading multipoint control unit.

23. A multipoint control unit comprising:

a first transmitting network interface module configured to receive packets carrying data of received compressed content from a content transmitting endpoint and transfer the data of the received compressed content toward a common interface;

a decoder, configured to obtain from the common interface the data of received compressed content, decode the data of the received compressed content and generate decoded content;

an encoder configured to compress the decoded content and provide a second data of compressed content; and

a second transmitting network interface module configured to obtain, from the common interface, the data of the received compressed content or to obtain the second data of compressed content and transmit packets that carry the obtained data toward a first receiving endpoint; and

a content manager module configured to identify capabilities of the first receiving endpoint, identify a quality of a connection associated with the first receiving endpoint, and accordingly instruct the second transmitting network interface module whether to obtain the data of the received compressed content or the second data of compressed content.

24. The multipoint control unit of claim 23, wherein the content manager module is configured to identify the quality of the connection associated with the receiving endpoint by monitoring, from time to time, the number of Intra requests received from the receiving endpoint and accordingly instruct the second transmitting network interface module.

25. The multipoint control unit of claim 23, wherein the content manager module is configured to identify the quality of the connection associated with the first receiving endpoint by monitoring, from time to time, missing packets over the connection with the first receiving endpoint and accordingly instruct the second transmitting network interface module.

26. The multipoint control unit of claim 23, wherein the capabilities of the first receiving endpoint comprises compression parameters used by the first receiving endpoint.

27. The multipoint control unit of claim 23, wherein transmission of the data of the received compressed content utilizes a larger bandwidth than transmission of the second data of compressed content.

28. The multipoint control unit of claim 23, further comprising a receiving network interface, configured to receive packets containing content from another multipoint control unit and generate the received frames of compressed content.

29. A non-transitory computer readable medium, comprising instructions that when executed by one or more processors of a multipoint control unit, cause the multipoint control unit receiving content from a content delivery endpoint to:

identify capabilities of a first receiving endpoint of a plurality of receiving endpoints;

identify a quality of a connection associated with the first receiving endpoint;

based on the identified capabilities and quality, associate content delivery resources of the multipoint control unit for transmitting the content toward the first receiving endpoint, wherein the content delivery resources associated with the first receiving endpoint differ from content delivery resources associated with a second receiving endpoint of the plurality of receiving endpoints; and

transfer the content toward the first receiving endpoint and the second receiving endpoint.

30. The computer readable medium of claim 29, wherein the instructions that when executed cause the multipoint control unit to associate content delivery resources comprise instructions that when executed by one or more processors of the multipoint control unit to:

select one of;

a network interface;

a decoder, an encoder, and a network interface;

or

a decoder, an encoder, a continuous presence video module, and a network interface.

31. The computer readable medium of claim 29,

wherein the instructions further comprise instructions that when executed cause the multipoint control unit to define a plurality of quality levels corresponding to capabilities and connection quality, and

wherein the instructions that when executed cause the multipoint control unit to associate content delivery resources comprise instructions that when executed cause the multipoint control unit to:

associate a quality level of the plurality of quality levels with the first receiving endpoint; and

associate content delivery resources with the first receiving endpoint corresponding to the associated quality level.

32. The computer readable medium of claim 29, where the instructions further comprise instructions that when executed by one or more processors of the multipoint control unit cause the multipoint control unit to function as a cascading multipoint control unit.