Sanjay K Gupta

US Patent:

6437780, Aug 20, 2002

Filed:

Mar 17, 1999

Appl. No.:

09/271637

Inventors:

Oana Baltaretu - Palo Alto CA
David L. Dignam - Belmont CA
Sanjay O. Gupta - Fremont CA

Assignee:

Nvidia US Investment Company - Santa Clara CA

International Classification:

G06T 1720

US Classification:

345423, 345441, 345443, 345620

Abstract:

A geometry tiler identifies tiles on a computers screen that are covered by a graphics primitive by use of edges of the graphics primitive. Precise identification of tiles of various types (such as edge tiles covered by a segment) eliminates identification of one or more tiles that are merely located adjacent to the graphics primitive, but are not touched by the graphics primitive. For example, the geometry tiler can identify each of three types of tiles: vertex tiles, edge tiles and interior tiles. In one implementation, the geometry tiler identifies all tiles that are covered by a graphics primitive in the form of a convex polygon by: (a) determining attributes of at least one segment in the convex polygon, (b) determining iteration descriptors for each segment by using the attributes, (c) for each segment in the convex polygon, scanning the segment and identifying each edge tile that is covered by the segment, and (d) for each column of tiles in the screen, going from one edge tile in the column to another edge tile in the column and identifying each interior tile that is located within an area enclosed by the segments of the primitive. In one specific implementation, the geometry tiler simultaneously identifies edge tiles that are covered by two segments of the convex polygon that are located opposite to each other (such as a top segment and a bottom segment).

US Patent:

6657635, Dec 2, 2003

Filed:

Aug 31, 2000

Appl. No.:

09/654104

Inventors:

Edward Hutchins - Mountain View CA
Ming Benjamin Zhu - San Jose CA
Sanjay O. Gupta - Fremont CA
Scott C. Heeschen - Campbell CA
Benjamin J. Garlick - Sunnyvale CA

Assignee:

NVIDIA Corporation - Santa Clara CA

International Classification:

G06F 1202

US Classification:

345543, 711135, 711171

Abstract:

Methods and systems for optimizing graphics data processing employ various binning flush algorithms to optimize the utilization of binning memory in a graphics system. Binning flush algorithms provide for processing all geometry and commands binned up to the point the binning memory becomes unavailable, and storing and restoring all necessary intermediate data generated during the partial tile rendering.

US Patent:

7260117, Aug 21, 2007

Filed:

Jun 28, 2002

Appl. No.:

10/187388

Inventors:

Guozhu Long - Newark CA, US
Les Brown - Streetsville, CA
Sanjay Gupta - Union City CA, US

Assignee:

Centillium Communications, Inc. - Fremont CA

International Classification:

H04J 3/06

US Classification:

370503

Abstract:

Techniques for establishing TTR indication in ADSL Annex C based communication systems are disclosed. The techniques enable, for example, hyperframe alignment and synchronized initialization procedures (e. g. , G. hs).

US Patent:

8238450, Aug 7, 2012

Filed:

Jan 19, 2010

Appl. No.:

12/689875

Inventors:

Sanjay Gupta - Pleasanton CA, US
Amir H. Fazlollahi - Santa Clara CA, US
Guozhu Long - Fremont CA, US
Ying Li - Shenzhen, CN
Raphael Jean Cendrillon - Hong Kong, CN

Assignee:

Futurewei Technologies Inc. - Plano TX

International Classification:

H04B 3/00

US Classification:

375257, 375219, 375220, 375221, 375222, 375225, 375227, 375258, 375260, 375261, 375295, 375296, 375298, 375316, 370206, 370207, 370208, 370210, 370272, 370273, 370276, 370297, 370343, 370480, 455 39, 455 6713, 455 69, 455 73, 455 91, 4551143, 4551151, 4551153, 4552263, 379 2202, 379 2208, 379 24, 379 2601, 379 2703, 379 9301, 725111

Abstract:

An apparatus comprising an artificial noise (AN) controller coupled to a digital subscriber line (DSL) transmitter and configured to adjust an AN level for a signal transmitted by the DSL transmitter, wherein the AN level is adjusted based on an actual signal to noise ratio (SNR) of the signal from the receiver to achieve a desired SNR for the signal. Also disclosed is a method comprising maintaining a data rate in a line at about a desired level by adjusting an AN level in a transmitted signal based on a SNR of a received signal.

US Patent:

8300532, Oct 30, 2012

Filed:

Sep 23, 2008

Appl. No.:

12/235677

Inventors:

Anjan Venkatramani - Los Altos CA, US
Kannan Varadhan - San Jose CA, US
Jean-Marc Frailong - Los Altos CA, US
Sanjay Gupta - Santa Clara CA, US
Linda Sun - San Jose CA, US
Sankar Ramamoorthi - San Jose CA, US
Pradeep Sindhu - Los Altos Hills CA, US
Anand S. Athreya - San Jose CA, US
Chih-Wei Chao - Saratoga CA, US
Shuhua Ge - Fremont CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04L 12/26
H04L 12/56

US Classification:

370235, 370392

Abstract:

A method may include receiving a packet at an ingress line interface in a forwarding plane of a network element, the packet including header information. The method may also include conducting a flow table lookup in the forwarding plane to identify an existing flow for the packet and determining, in the forwarding plane and based on the header information, whether a predicted flow can be identified for the packet if an existing flow can not be identified. The method may further include performing a service access control list (ACL) lookup in the forwarding plane if a predicted flow can not be identified; and forwarding the packet to one of a services plane or an egress line interface in the forwarding plane based on one of the existing flow, the predicted flow, or the service ACL lookup.

US Patent:

20020165820, Nov 7, 2002

Filed:

May 4, 2001

Appl. No.:

09/848795

Inventors:

Dinesh Anvekar - Edison NJ, US
Bhaskarpillai Gopinath - Watchung NJ, US
Sanjay Gupta - Edison NJ, US

International Classification:

G06F017/60

US Classification:

705/039000

Abstract:

A technique for delivery of a personalized identification number (PIN) from a centralized database of a prepaid PIN service provider along with a digital signature for verification of the transaction. As a response to a cash amount inputted by the user to a PIN vending machine, an unassigned PIN in a centralized database is assigned to the user as a unique user PIN, and delivered to the user as an imprinted receipt along with an associated digital signature for authentication.

US Patent:

20040136405, Jul 15, 2004

Filed:

Nov 13, 2003

Appl. No.:

10/713589

Inventors:

Guozhu Long - Fremont CA, US
Sanjay Gupta - Union City CA, US
Guojie Dong - San Jose CA, US

International Classification:

H04J003/06

US Classification:

370/503000

Abstract:

Techniques are disclosed for obtaining and maintaining synchronization of the TTR clock during a Channel Discovery Phase of DSL transceiver initialization for a DSL service operating in a TCM-ISDN crosstalk environment. The customer premises DSL transceiver achieves synchronization of its TTR clock throughout the Channel Discovery Phase of the DSL initialization procedure using a TTR indication signal transmitted by the central office transceiver. In addition to enabling basic communications, keeping TTR synchronization improves the accuracy of quiet noise measurement and the reliability of message exchanges, even on very long and noisy loops.

US Patent:

20040258000, Dec 23, 2004

Filed:

Apr 30, 2004

Appl. No.:

10/835913

Inventors:

Jalil Kamali - San Jose CA, US
Guozhu Long - Fremont CA, US
Sanjay Gupta - Union City CA, US

International Classification:

H04L012/26

US Classification:

370/252000, 370/332000

Abstract:

A system and method for selecting the operational mode in an ADSL Annex C environment during the handshake operation while increasing the accuracy of the determining the throughputs across the possible frequency spectrum while only having access to the power level of a small number of frequency bins during the handshake operation. In one embodiment of the present invention, the present invention receives signals in a multiple but small number of bins and estimates the loop length based upon the signal power in at least two of these bins. The present invention then identifies the noise profile over the relevant band of frequencies (or a subset thereof) to determine the bit rate. In one embodiment, the present invention selects the mode based upon a the bit rate in a single direction. In another embodiment, the present invention selects the mode based upon both the upstream and downstream bit rates.