Jeffrey M Ayars

US Patent:

6633918, Oct 14, 2003

Filed:

Sep 27, 2001

Appl. No.:

09/966375

Inventors:

Rahul Agarwal - Seattle WA
Jeffrey M. Ayars - Federal Way WA
Bradley D. Hefta-Gaub - Seattle WA
Gary S. Greenbaum - Seattle WA
Alan F. Lippman - Seattle WA
Sujal M. Patel - Seattle WA
Dale R. Stammen - Seattle WA
Philip Rosedale - Seattle WA
Bryan Vergato - Seattle WA

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

G06F 1300

US Classification:

709231, 709219, 709329

Abstract:

A system and method provide random access to a multimedia object over a network. One embodiment of the invention includes a streaming media server that is connected to a client computer over a network. The streaming media server includes at least one multimedia object that is adapted for transmission (âstreamingâ) across the network. A pre-roll calculation program determines a pre-roll for each segment of the multimedia object and generates a modified multimedia object which includes a pre-roll for each of its segments, a pre-roll identifying a portion of the multimedia object to be transmitted by the streaming media server and received by the client computer prior to playback of the multimedia object at a selected segment. The pre-roll allows the client computer to present, starting at a selected segment, the multimedia object in its entirety without interruption. The pre-roll calculation program further facilitates the design of the multimedia object to minimize delays associated with random accesses to segments of the multimedia object.

US Patent:

6731600, May 4, 2004

Filed:

Feb 8, 1999

Appl. No.:

09/246506

Inventors:

Sujal M. Patel - Seattle WA
Jeffrey M. Ayars - Federal Way WA
Rahul Agarwal - Seattle WA
Bradley D. Hefta-Gaub - Seattle WA
Peter S. Haight - Berkeley CA
Dale R. Stammen - Seattle WA
Philip Rosedale - Seattle WA

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

H04L 1226

US Classification:

370230, 370235, 370252, 370468

Abstract:

A system and a method determine network conditions. The system includes a server computer and a client computer. The server computer is configured to transmit data packets comprising a data object from the server computer to the client computer. The client computer includes a transmission latency detector and a transmission bandwidth detector. The transmission latency detector uses transmission time and receipt time values to determine the changes in time it takes selected portions of the data object to be transmitted from the server computer to the client computer. The transmission bandwidth detector uses identified back-to-back data packets to determine the transmission bandwidth between the server computer and the client computer.

US Patent:

7284065, Oct 16, 2007

Filed:

Aug 22, 2003

Appl. No.:

10/646933

Inventors:

Rahul Agarwal - Seattle WA, US
Jeffrey M. Ayars - Federal Way WA, US
Bradley D. Hefta-Gaub - Seattle WA, US
Gary S. Greenbaum - Seattle WA, US
Alan F. Lippman - Seattle WA, US
Sujal M. Patel - Seattle WA, US
Dale R. Stammen - Seattle WA, US
Philip Rosedale - Seattle WA, US
Bryan Vergato - Seattle WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

G06F 13/00

US Classification:

709231, 709219, 709232, 709250, 719329

Abstract:

A system and method provide random access to a multimedia object over a network. One embodiment of the invention includes a streaming media server that is connected to a client computer over a network. The streaming media server includes at least one multimedia object that is adapted for transmission (“streaming”) across the network. A pre-roll calculation program determines a pre-roll for each segment of the multimedia object and generates a modified multimedia object which includes a pre-roll for each of its segments, a pre-roll identifying a portion of the multimedia object to be transmitted by the streaming media server and received by the client computer prior to playback of the multimedia object at a selected segment. The pre-roll allows the client computer to present, starting at a selected segment, the multimedia object in its entirety without interruption. The pre-roll calculation program further facilitates the design of the multimedia object to minimize delays associated with random accesses to segments of the multimedia object.

US Patent:

7636860, Dec 22, 2009

Filed:

Feb 13, 2002

Appl. No.:

10/075471

Inventors:

Jeffrey M. Ayars - North Bend WA, US
Rahul Agarwal - Issaquah WA, US
Alain Hamel - North Bend WA, US
Darren P. Schack - Seattle WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

G06F 11/30

US Classification:

713194, 713189, 726 2, 726 27

Abstract:

A number of digital content rendering modules are equipped such that selective subsets of the modules may be employed to render digital content of different media, and of different format types. The modules are organized into a hierarchy, with a selected one occupying a root position of the hierarchy, to exclusively receive the digital contents to be rendered, and that each module is further responsible for verifying the integrity of its immediate downstream modules, to collectively protect the digital contents being rendered. Additionally, in accordance with another aspect, a tamper resistant module is employed to recover digital contents provided in a protected state, obfuscating the recovery. Further, the modules may be of different application domains.

US Patent:

7681035, Mar 16, 2010

Filed:

Sep 10, 2003

Appl. No.:

10/660302

Inventors:

Jeffrey M. Ayars - North Bend WA, US
Bradley D. Hefta-Gaub - Seattle WA, US
Daniel Sheeran - Medina WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

H04L 9/00
G06F 11/30
H04L 9/32

US Classification:

713165, 713189, 713190, 713191, 713193, 713194, 726 27, 726 28, 726 29, 726 30, 726 26

Abstract:

A system and method of providing universal digital rights management system protection is described. One feature of the invention concerns systems and methods for repackaging and securing data packaged under any file format type, compression technique, or digital rights management system. Another feature of the invention is directed to systems and methods for securing data by providing scalability through the use of modular data manipulation software objects.

US Patent:

7685646, Mar 23, 2010

Filed:

Sep 10, 2003

Appl. No.:

10/659985

Inventors:

Joshua D. Hug - Seattle WA, US
Alain Hamel - North Bend WA, US
Adam B. Cappio - Seattle WA, US
Brent D. Newman - Sammamish WA, US
Xiaodong Fu - Fairfax VA, US
Rahul Agarwal - Issaquah WA, US
Jeffrey M. Ayars - North Bend WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

G06F 7/04
G06F 17/30
H04N 7/16

US Classification:

726 30, 713160, 726 28, 726 29

Abstract:

A system and method for producing and using a protected optical media is described. One feature provides for a compact disc containing digital rights management protection to prevent unauthorized copying of copyrighted materials. Another feature provides for secure copying, storage, transfer, and playback of digital audio content from a protected compact disc or computer storage. Yet another feature provides for a versatile optical media that can be used in both traditional audio compact disc players and in computer CD-ROM drives without risking the security of the content on the media or preventing purchasers from having a robust content experience.

US Patent:

7885340, Feb 8, 2011

Filed:

Dec 22, 2004

Appl. No.:

11/022474

Inventors:

Gary S. Greenbaum - Seattle WA, US
Jeffrey M. Ayars - Federal Way WA, US
Gregory J. Conklin - Seattle WA, US
Alan F. Lippman - Seattle WA, US
Bradley D. Hefta-Gaub - Seattle WA, US
Dale R. Stammen - Seattle WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

H04N 7/12
H04B 1/66

US Classification:

37524028, 382232

Abstract:

The present invention provides a system and methods for producing multiple encoded representations of a video input sequence. The multiple representations produced each contain identified synchronization frames that allow a server and a client to switch between streamed representations in real time without interruption. Synchronization frames are frames of encoded video that can be independently decoded. A representation can thus be decoded starting at a synchronization frame. Each synchronization frame in one representation has a corresponding synchronization frame at a substantially similar temporal location in any other generated representation of the same video input sequence. The temporal co-location of synchronization frames in all representations facilitates the dynamic switching between representations during the streaming process. The present invention also provides a video encoder application that shares data during the encoding of multiple representations of a video input sequence by reusing data calculated in the encoding of one representation to encode other representations. The application can also generate the multiple encoded representations simultaneously.

US Patent:

7948906, May 24, 2011

Filed:

Mar 15, 2004

Appl. No.:

10/800535

Inventors:

Sujal M. Patel - Seattle WA, US
Jeffrey M. Ayars - Federal Way WA, US
Rahul Agarwal - Seattle WA, US
Bradley D. Hefta-Gaub - Seattle WA, US
Peter S. Haight - Berkeley CA, US
Dale R. Stammen - Seattle WA, US
Philip Rosedale - Seattle WA, US

Assignee:

RealNetworks, Inc. - Seattle WA

International Classification:

H04L 12/26

US Classification:

370252, 370229, 370241, 370253, 370468, 370503

Abstract:

A system and a method determine network conditions. The system includes a server computer and a client computer. The server computer is configured to transmit data packets comprising a data object from the server computer to the client computer. The client computer includes a transmission latency detector and a transmission bandwidth detector. The transmission latency detector uses transmission time and receipt time values to determine the changes in time it takes selected portions of the data object to be transmitted from the server computer to the client computer. The transmission bandwidth detector uses identified back-to-back data packets to determine the transmission bandwidth between the server computer and the client computer.