Zhi C Li

US Patent:

7720986, May 18, 2010

Filed:

Aug 24, 2007

Appl. No.:

11/844692

Inventors:

Raghvendra G. Savoor - Walnut Creek CA, US
Zhi Li - San Ramon CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

G06F 15/16
G06F 15/173

US Classification:

709231, 709223, 709246

Abstract:

A method includes receiving a media request for a target device. The signaling information may be received from the target device and a media server. At least one attribute of the target device and the media server may be identified using the signaling information. At least one attribute of the target device and the media server may be evaluated against a service level objective to select a media format. The service level objective may include consideration of the target device and available bandwidth over a provider network. The media may be provided in the selected media format over the provider network to the target device.

US Patent:

7729381, Jun 1, 2010

Filed:

Sep 15, 2006

Appl. No.:

11/522275

Inventors:

Raghvendra G. Savoor - Walnut Creek CA, US
Zhi Li - San Ramon CA, US
Steven Gemelos - Cupertino CA, US
Ganesh Krishnamurthi - Danville CA, US
Steve Sposato - Lafayett CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

H04J 3/24

US Classification:

370474, 37524024

Abstract:

A method including receiving data packets encapsulating at least part of a media stream, extracting a decoder-ready packet from the data packets, processing the decoder-ready packet; and substantially synchronously with the processing of the decoder-ready packet, generating delivery performance information for the at least part of the media stream, data from which is included in the decoder-ready packet.

US Patent:

7768935, Aug 3, 2010

Filed:

Apr 12, 2006

Appl. No.:

11/403510

Inventors:

Canhui Ou - Danville CA, US
Mung Chiang - Princeton NJ, US
Zhi Li - San Ramon CA, US
Orestis Manthoulis - Sausalito CA, US
Xiaochuan Yi - San Ramon CA, US
Kaiyan Chen - Pleasanton CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

G01R 31/08

US Classification:

370252, 370229, 370258, 370238

Abstract:

Various embodiments of the disclosed subject matter provide methods and systems to generate node-disjoint routing paths from a root node to each node in a network node set, identify potential intermediate office node (IO) candidate pairs from the generated node-disjoint routing paths, generate a per central office node (CO) serving cost estimate for each IO candidate pair, and identify a low cost IO candidate pair having at least two node-disjoint paths to the root node without traversing nodes along a diverse path between the low cost IO candidate pair and subtending CO nodes.

US Patent:

7814521, Oct 12, 2010

Filed:

Apr 25, 2007

Appl. No.:

11/789696

Inventors:

Canhui Ou - Danville CA, US
Zhi Li - San Ramon CA, US
Yali Liu - Davis CA, US

Assignee:

ATT Knowledge Venturers, L.P. - Reno NV

International Classification:

H04N 7/10
H04N 7/173
G06F 15/16

US Classification:

725 96, 725 97, 725 34

Abstract:

A method is disclosed for distributing advertising data in an internet protocol television (IPTV) system, the method including dividing a plurality of end user devices in the IPTV system into K advertising groups; multicasting J advertising data multicast groups to end user devices in J advertising groups having a percentile ranking above or equal to a predetermined percentile ranking; and unicasting advertising data channels for actively viewed IPTV channels being viewed by other end users.

US Patent:

7921212, Apr 5, 2011

Filed:

Oct 14, 2008

Appl. No.:

12/251130

Inventors:

Jian Li - San Ramon CA, US
Raghvendra Savoor - Walnut Creek CA, US
Zhi Li - Martinez CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Atlanta GA

International Classification:

G06F 15/173

US Classification:

709226, 709223, 709224

Abstract:

Example methods and apparatus to allocate bandwidth between video and non-video services in access networks are disclosed. An example system comprises a customer-premises device, a digital subscriber line access multiplexer (DSLAM) to transmit to the customer-premises device a signal having a non-video portion and a video portion, a usage monitor at the customer-premises device to monitor a usage of the video portion and to send a parameter representative of the usage of the video portion to the DSLAM, and a policy manager at the DSLAM to adjust at the DSLAM a bandwidth allocation between the video portion and the non-video portion based on the parameter.

US Patent:

8037505, Oct 11, 2011

Filed:

Jan 30, 2006

Appl. No.:

11/343804

Inventors:

Canhui Ou - Darriville CA, US
Steven Gemelos - Cupertino CA, US
Zhi Li - San Ramon CA, US

Assignee:

AT&T Intellectual Property I, LP - Atlanta GA

International Classification:

H04N 7/173
H04N 9/00
G06F 3/00
G06Q 30/00

US Classification:

725 91, 725 9, 725 14, 725 39, 725 86, 725 87, 725 92, 725100, 725104, 705 1444, 705 1452, 705 1453, 705 1455

Abstract:

Various embodiments of the disclosed subject matter provide methods and systems to automatically identify popular television programs based on the viewing of broadcast television programs by at least some of the subscribers of a television distribution system. One or more of the popular television programs identified are stored and offered to one or more of the subscribers on-demand. Subscribers can obtain delivery of at least one of the stored popular television programs for viewing on a subscriber television.

US Patent:

8068584, Nov 29, 2011

Filed:

Oct 26, 2006

Appl. No.:

11/588858

Inventors:

Xidong Wu - Livermore CA, US
Zhi Li - San Ramon CA, US

Assignee:

AT&T Intellectual Property I, LP - Atlanta GA

International Classification:

H04M 1/24
H04M 3/08
H04M 3/22

US Classification:

379 104, 379 103

Abstract:

A method for selecting a profile for a digital subscriber line is disclosed, the method including collecting code violation data for a plurality of digital subscriber lines, identifying a group of problem lines in the plurality of digital subscriber lines, modeling estimated code violations for each of a group profiles for each line in the group of problem lines and selecting one of the group of profiles. A system is disclosed for performing the method.

US Patent:

8091109, Jan 3, 2012

Filed:

Dec 18, 2007

Appl. No.:

11/958525

Inventors:

Jian Li - San Ramon CA, US
Zhi Li - Martinez CA, US
Sun-Uk Park - Union City CA, US

Assignee:

AT&T Intellectual Property I, LP - Atlanta GA

International Classification:

H04N 7/173

US Classification:

725 94, 725 93, 725 95, 725 96

Abstract:

A method for redirecting video content includes receiving a video signal at the set-top box and decoding the video signal to produce unrendered video data. The unrendered video data is encoded and provided to the remote device via a wide area network. By encoding unrendered, rather than rendered, video data for transmission to the remote device, the need for an encoding device external to the set-top box is obviated.