Patents by Inventor David Hilton Shur
David Hilton Shur has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20090290543Abstract: A method includes receiving a plurality of radio frequency (RF) channels in parallel at a receive site, and demodulating the RF channels using a plurality of demodulators of the receive site to generate a plurality of streams of packets, each stream of packets having a first address space. The method also includes combining the plurality of streams of packets at a tunneling destination of the receive site to generate a first stream of packets having a second address space.Type: ApplicationFiled: August 4, 2009Publication date: November 26, 2009Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd L. Totland, Jacobus Van der Merwe, Sheryl Leigh Woodward
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Patent number: 7620847Abstract: A system and method are disclosed for the repair of IP multicast sessions. A repair server polls multiple transmit servers to accumulate as many of the packets missing from the multicast session as possible. A network includes a source of multicast packets in a multicast session and a plurality of multicast recipients in that session. A repair server in the network provides the packets it receives to the recipients. The repair server includes a missing packet detector. There is a plurality of retransmit servers in the network buffering portions of the packets they respectively receive during the session. The repair server maintains an ordered list of the retransmit servers that are most likely to have buffered copies of packets missing from the session. When the repair server detects that there are packets missing from the session it has received, it uses the ordered list to sequentially request the missing packets from respective ones of the plurality of retransmit servers.Type: GrantFiled: January 26, 2009Date of Patent: November 17, 2009Assignee: AT&T Intellectual Property II, L.P.Inventors: Nicholas Frank Maxemchuk, David McManamon, David Hilton Shur, Aleksandr Zelezniak
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Patent number: 7590889Abstract: A system and method are disclosed for the repair of IP multicast sessions. A repair server polls multiple transmit servers to accumulate as many of the packets missing from the multicast session as possible. A network includes a source of multicast packets in a multicast session and a plurality of multicast recipients in that session. A repair server in the network provides the packets it receives to the recipients. The repair server includes a missing packet detector. There is a plurality of retransmit servers in the network buffering portions of the packets they respectively receive during the session. The repair server maintains an ordered list of the retransmit servers that are most likely to have buffered copies of packets missing from the session. When the repair server detects that there are packets missing from the session it has received, it uses the ordered list to sequentially request the missing packets from respective ones of the plurality of retransmit servers.Type: GrantFiled: June 23, 2004Date of Patent: September 15, 2009Assignee: AT&T Intellectual Property II, L.P.Inventors: Nicholas Frank Maxemchuk, David McManamon, David Hilton Shur, Aleksandr Zelezniak
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Method and system for a Unicast endpoint client to access a multicast internet protocol (IP) session
Patent number: 7031326Abstract: Unicast endpoint clients (110, 111, 115) on an IP Unicast network (107, 108) are provided access to Multicast sessions on an IP Multicast network (101) through a Multicast-Unicast gateway server (120, 121). The server obtains information about sessions on the Multicast network and makes such information available to a Unicast client on the Unicast network upon request by the client. Upon being presented with a list describing the subject matter of each session, the user at the Unicast client selects the session to which he or she wants to join, which causes the Multicast-Unicast server to join the appropriate session on behalf of the requesting client for each media type in which the joining client wants to be a participant. The server then sets a bi-directional Unicast User Datagram Protocol (UDP) stream between itself and the client. All packets then received by the server from the Unicast client are address-translated to the appropriate Multicast session address.Type: GrantFiled: April 30, 2001Date of Patent: April 18, 2006Assignee: AT&T CorpInventors: David Hilton Shur, Aleksandr Zelezniak -
Patent number: 6993050Abstract: A transmit and receive system for transmitting data between a transmit site and a receive site. The system includes a tunnel source, router and modulator for dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels. The system further includes a demodulator and destination source for recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.Type: GrantFiled: August 8, 2001Date of Patent: January 31, 2006Assignee: AT&T Corp.Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd J. Totland, Jacobus E. van der Merwe, Sheryl Leigh Woodward
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Patent number: 6993353Abstract: A method for sending data from a transmit site to a receive site which includes dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels and recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.Type: GrantFiled: August 8, 2001Date of Patent: January 31, 2006Assignee: AT&T Corp.Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd J. Totland, Jacobus E. van der Merwe, Sheryl Leigh Woodward
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Patent number: 6954456Abstract: The present invention is directed to mechanisms for content-aware redirection and content exchange/content discovery that permit a request for content to be redirected to a particular advantageous server that can serve the content.Type: GrantFiled: December 14, 2001Date of Patent: October 11, 2005Assignee: AT & T Corp.Inventors: Charles D. Cranor, Raman Gopalakrishnan, Matthew D. Green, Charles Robert Kalmanek, Jr., David Hilton Shur, Sandeep Sibal, Jacobus E. van der Merwe
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Patent number: 6845399Abstract: A method and apparatus that enhances a multicast information stream, such as an IP multicast session, in a communication network is provided. The stream is received through the communication network and is enhanced at substantially the time the first stream is received. The information stream may be enhanced by adding transcribed content, such as content generated by speech recognition software, or translated content, such as from a first language to a second language, to the stream. The information stream may also be enhanced by adding content to the first information stream, such as content is related to the original content. The enhanced stream may be sent to a user as a second multicast information stream. The enhanced stream may be received by the user in place of, or along with, the original information stream. The enhanced content may be sent to the user at the conclusion of the information stream, if desired.Type: GrantFiled: April 18, 2002Date of Patent: January 18, 2005Inventors: Sanjay Agraharam, Robert Edward Markowitz, Kenneth H. Rosen, David Hilton Shur, Joel A. Winthrop
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Patent number: 6788672Abstract: A method and apparatus for telephony messaging based on a network of packet telephony messaging (PTM) servers. A message is received at an originating PTM server from an originator for delivery to a target device for a recipient. The message is stored at the originating PTM server. The message is routed from the originating PTM server (possibly via a second and subsequent PTM servers) over a first network to a destination PTM server located near the target device. The recipient is notified of the message by the destination PTM server. The message is delivered to the target device from the second PTM server over a second network in response to a request by the recipient.Type: GrantFiled: April 15, 1997Date of Patent: September 7, 2004Assignee: AT&T Corp.Inventors: Cagatay Buyukkoc, Michael B. Jones, David Hilton Shur
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Patent number: 6782490Abstract: A system and method are disclosed for the repair of IP multicast sessions. A repair server polls multiple transmit servers to accumulate as many of the packets missing from the multicast session as possible. A network includes a source of multicast packets in a multicast session and a plurality of multicast recipients in that session. A repair server in the network provides the packets it receives to the recipients. The repair server includes a missing packet detector. There is a plurality of retransmit servers in the network buffering portions of the packets they respectively receive during the session. The repair server maintains an ordered list of the retransmit servers that are most likely to have buffered copies of packets missing from the session. When the repair server detects that there are packets missing from the session it has received, it uses the ordered list to sequentially request the missing packets from respective ones of the plurality of retransmit servers.Type: GrantFiled: December 27, 2002Date of Patent: August 24, 2004Assignee: AT&T Corp.Inventors: Nicholas Frank Maxemchuk, David McManamon, David Hilton Shur, Aleksandr Zelezniak
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Publication number: 20040078624Abstract: A system and method are disclosed for the repair of IP multicast sessions. A repair server polls multiple transmit servers to accumulate as many of the packets missing from the multicast session as possible. A network includes a source of multicast packets in a multicast session and a plurality of multicast recipients in that session. A repair server in the network provides the packets it receives to the recipients. The repair server includes a missing packet detector. There is a plurality of retransmit servers in the network buffering portions of the packets they respectively receive during the session. The repair server maintains an ordered list of the retransmit servers that are most likely to have buffered copies of packets missing from the session. When the repair server detects that there are packets missing from the session it has received, it uses the ordered list to sequentially request the missing packets from respective ones of the plurality of retransmit servers.Type: ApplicationFiled: December 27, 2002Publication date: April 22, 2004Applicant: AT&T Corp.Inventors: Nicholas Frank Maxemchuk, David McManamon, David Hilton Shur, Aleksandr Zelezniak
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Publication number: 20030112792Abstract: The present invention is directed to mechanisms for content-aware redirection and content exchange/content discovery that permit a request for content to be redirected to a particular advantageous server that can serve the content.Type: ApplicationFiled: December 14, 2001Publication date: June 19, 2003Applicant: AT &T Corp.Inventors: Charles D. Cranor, Raman Gopalakrishnan, Matthew D. Green, Charles Robert Kalmanek, David Hilton Shur, Sandeep Sibal, Jacobus E. van der Merwe
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Patent number: 6567929Abstract: A system and method provide for recipient-initiated automatic repair of IP multicast sessions. A multicast application on a receiver issues a request to join an IP multicast session “X”. A translator/decryption module (TDM) on the receiver intercepts this request and sends it to a controller on a repair server. The controller sends a request to a subscription server to determine if this user has subscribed to the repair service. The controller receives a positive response from the subscription server and determines whether a repair/encryption module exists for this multicast session. If it does not, then the controller selects an IP multicast address, port number and decryption key for a new IP multicast session “Y”. This information is returned to the TDM. The controller creates a repair/encryption module (REM) and provides the IP multicast address and port number for the new IP multicast session “Y” and an encryption key to the REM.Type: GrantFiled: July 13, 1999Date of Patent: May 20, 2003Assignee: AT&T Corp.Inventors: Vijay K. Bhagavath, Joseph Thomas O'Neil, David Hilton Shur, Aleksandr Zelezniak
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Patent number: 6501763Abstract: A system and method are disclosed for the automatic and transparent repair of IP multicast sessions. The invention is a system and method for the repair of IP multicast sessions. In one aspect of the invention the method repairs a multicast session in a network, beginning with the step of sending a request message from a source to a subscription server in the network, requesting a repair service for an original multicast session originated by the source. The method continues by sending an enabling signal from the subscription server to a plurality of retransmit servers in the network, to buffer data traffic from the original multicast session, in response to the request. The method continues by buffering a copy of the data traffic at each of the plurality of retransmit servers and monitoring errors in each copy. The method continues by automatically selecting with the plurality of retransmit servers at least one retransmit server from among the plurality, having a minimum of the errors in its respective copy.Type: GrantFiled: May 6, 1999Date of Patent: December 31, 2002Assignee: AT&T Corp.Inventors: Vijay K. Bhagavath, Joseph Thomas O'Neil, David Hilton Shur, Aleksandr Zelezniak
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Patent number: 6493457Abstract: A method and apparatus are described for inserting a watermark in the compressed domain. The watermark inserted does not require a reference. An overall watermarking system incorporating the invention combines cleartext, bitstream, and integrated watermarking. In a perceptual coder, the data enters a filterbank, where it is processed into multiple separate coefficients. A rate/distortion control module uses noise threshold information from a perceptual coder, together with bit-count information from a noiseless coder, to compute scale factors. The coefficients are multiplied by the scale factors and quantized, then noiseless coded and then output for further processing/transmission. The invention supports three embodiments for inserting a mark into the bitstream imperceptibly. It is assumed that some set of scale factor bands have been selected, into which mark data will be inserted. In one embodiment, a set of multipliers {xi=2Ni: i&egr;M} is chosen.Type: GrantFiled: November 16, 1998Date of Patent: December 10, 2002Assignee: AT&T Corp.Inventors: Schuyler Reynier Quackenbush, Amy Ruth Reibman, David Hilton Shur, James H. Snyder
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Publication number: 20020132629Abstract: A method for sending data from a transmit site to a receive site which includes dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels and recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.Type: ApplicationFiled: August 8, 2001Publication date: September 19, 2002Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd J. Totland, Jacobus E. van der Merwe, Sheryl Leigh Woodward
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Publication number: 20020131403Abstract: A transmit and receive system for transmitting data between a transmit site and a receive site. The system includes a tunnel source, router and modulator for dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels. The system further includes a demodulator and destination source for recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.Type: ApplicationFiled: August 8, 2001Publication date: September 19, 2002Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd J. Totland, Jacobus E. van der Merwe, Sheryl Leigh Woodward
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Publication number: 20020133618Abstract: A method and apparatus for sending data from a transmit site to a receive site which includes dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels and recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.Type: ApplicationFiled: August 8, 2001Publication date: September 19, 2002Inventors: Bhavesh N. Desai, Nemmara K. Shankaranarayanan, David Hilton Shur, Aleksandra Smiljanic, Todd J. Totland, Jacobus E. van der Merwe, Sheryl Leigh Woodward
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Publication number: 20020120837Abstract: A distributed architecture for a future global Internet stock exchange utilizes a modified timed Reliable Multicast Protocol comprising geographically distributed backbone nodes and trading nodes regionally connected to backbone nodes so that multicast messages are received at the same time in a two tier distribution network. The architecture together with a timed reliable multicast protocol has characteristics such as periodic token passing appropriate for the market data distribution application so that trading sites are equally treated by the protocol. The protocol is modified/enhanced to provide time synchronous emission of data and improved scalability. Grades of service may be provided as between nodes which comprise trading nodes and individuals receiving data from such nodes.Type: ApplicationFiled: February 28, 2001Publication date: August 29, 2002Inventors: Nicholas Frank Maxemchuk, David Hilton Shur
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Publication number: 20020112066Abstract: A method and apparatus that enhances a multicast information stream, such as an IP multicast session, in a communication network is provided. The stream is received through the communication network and is enhanced at substantially the time the first stream is received. The information stream may be enhanced by adding transcribed content, such as content generated by speech recognition software, or translated content, such as from a first language to a second language, to the stream. The information stream may also be enhanced by adding content to the first information stream, such as content is related to the original content. The enhanced stream may be sent to a user as a second multicast information stream. The enhanced stream may be received by the user in place of, or along with, the original information stream. The enhanced content may be sent to the user at the conclusion of the information stream, if desired.Type: ApplicationFiled: April 18, 2002Publication date: August 15, 2002Inventors: Sanjay Agraharam, Robert Edward Markowitz, Kenneth H. Rosen, David Hilton Shur, Joel A. Winthrop