Claus T Giloi

US Patent:

6850985, Feb 1, 2005

Filed:

Mar 1, 2000

Appl. No.:

09/515762

Inventors:

Claus T. Giloi - Redmond WA, US
Markham F. MacLin - Kirkland WA, US
Max G. Morris - Seattle WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 1516

US Classification:

709230, 709250

Abstract:

A method and system for setting up and managing secure data/audio/video conferences with a wide range of topologies is described. The disclosed method and system allow extending the range of topologies possible with the H. 323 conferencing standards while overcoming T. 120 negotiating constraints. Security in such conferences may be based on a trusted node system or on more complex security procedures. Furthermore, the taught conference topologies fully utilize the T. 120 standards while also permitting the reach of the conferences to the extent enabled by the H. 323 standards by implementing additional modules to manage the setting up and tearing down of one or more conference connections. In addition, the method and system allow for dynamically adjusting conference connections to improve bandwidth usage and utilize H. 323 support for gatekeepers.

US Patent:

6851053, Feb 1, 2005

Filed:

Mar 1, 2000

Appl. No.:

09/515767

Inventors:

Jane R. Liles - Seattle WA, US
Claus T. Giloi - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04L 900

US Classification:

713168, 713156, 709229, 709204, 370261

Abstract:

A method and system for controlling admission of new nodes to a secured conference combines transport layer security mechanism and application layer certificate exchange. A new node that is not directly connected to the top provider of the conference sends a request to join the conference and a certification identifying itself to a first conference node connected to the top provider. The first node performs transport level authentication of the new node, and then forwards the request and certificate of the new node on an application level to the top provider. The top provider verifies the identity of the new node based on the certificate. If the new node is allowed to join the conference, the top provider updates a list of conference participants and makes the certificate of the new node available to other conference nodes so that they can also verify the identity of the new node.

US Patent:

7133362, Nov 7, 2006

Filed:

Nov 14, 2001

Appl. No.:

09/992731

Inventors:

Lon-Chan Chu - Bellevue WA, US
Ido Ben-Shachar - Redmond WA, US
Ivan J. Leichtling - Redmond WA, US
Leonard Alan Collins - Carnation WA, US
Claus T. Giloi - Redmond WA, US
Yikang Xu - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G01R 31/08
H04L 12/28

US Classification:

370230, 370413, 370235

Abstract:

In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.

US Patent:

7409455, Aug 5, 2008

Filed:

Nov 8, 2004

Appl. No.:

10/984680

Inventors:

Claus T. Giloi - Redmond WA, US
Markham Maclin - Kirkland WA, US
Max Morris - Seattle WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 15/16
G06F 12/00

US Classification:

709230, 709203, 709250

Abstract:

A method and system for setting up and managing secure data/audio/video conferences with a wide range of topologies is described. The disclosed method and system allow extending the range of topologies possible with the H. 323 conferencing standards while overcoming T. 120 negotiating constraints. Security in such conferences may be based on a trusted node system or on more complex security procedures. Furthermore, the taught conference topologies fully utilize the T. 120 standards while also permitting the reach of the conferences to the extent enabled by the H. 323 standards by implementing additional modules to manage the setting up and tearing down of one or more conference connections. In addition, the method and system allow for dynamically adjusting conference connections to improve bandwidth usage and utilize H. 323 support for gatekeepers.

US Patent:

7843818, Nov 30, 2010

Filed:

Feb 17, 2006

Appl. No.:

11/356935

Inventors:

Lon-Chan Chu - Bellevue WA, US
Ido M. Ben-Shachar - Redmond WA, US
Ivan J. Leichtling - Redmond WA, US
Leonard Alan Collins - Carnation WA, US
Claus T. Giloi - Redmond WA, US
Yikang Xu - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

H04L 12/28
H04N 5/04

US Classification:

370230, 370235, 348500

Abstract:

In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.

US Patent:

8346849, Jan 1, 2013

Filed:

Jun 5, 2008

Appl. No.:

12/134171

Inventors:

Claus T. Giloi - Redmond WA, US
Markham Maclin - Kirkland WA, US
Max Morris - Seattle WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 15/16
G06F 12/00

US Classification:

709203

Abstract:

A method and system for setting up and managing secure data/audio/video conferences with a wide range of topologies is described. The disclosed method and system allow extending the range of topologies possible with the H. 323 conferencing standards while overcoming T. 120 negotiating constraints. Security in such conferences may be based on a trusted node system or on more complex security procedures. Furthermore, the taught conference topologies fully utilize the T. 120 standards while also permitting the reach of the conferences to the extent enabled by the H. 323 standards by implementing additional modules to manage the setting up and tearing down of one or more conference connections. In addition, the method and system allow for dynamically adjusting conference connections to improve bandwidth usage and utilize H. 323 support for gatekeepers.

US Patent:

6570590, May 27, 2003

Filed:

Oct 6, 1999

Appl. No.:

09/413451

Inventors:

Deborah L. Dubrow - Kirkland WA
Laura J. Butler - Seattle WA
Jane L. Dailey - Seattle WA
Claus T. Giloi - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G09G 500

US Classification:

345751, 345753, 345748

Abstract:

User interface for displaying and interacting with images corresponding to applications shared over a computer network in a data conference is described. The described interface provides a user with greater control over the use of a desktop by providing controls for moving and sizing images, including fake windows, corresponding to shared applications by displaying such windows in a frame. The frame is the entity that is manipulated by a user with familiar graphical symbols, or even custom designs, thus avoiding potential complexity in managing control over the images of the shared applications. This user interface facilitates frames that may optionally be semi-transparent or transparent in order to allow a user to keep track of icons and windows covered by the frame. Frames are also useful in reducing network traffic by providing a method for detecting the level of interest of a user in a shared application. Thus, they can be used to modulate the frequency of updating images of shared applications to reflect the need for changes determined by whether the frame is in focus or even closed.