Thomas C Karpati

US Patent:

7453066, Nov 18, 2008

Filed:

Jan 5, 2004

Appl. No.:

10/541562

Inventors:

Michael J. Petrillo - Pleasanton CA, US
Kim H. Hansen - Bagsvaerd, DK
Thomas Karpati - San Francisco CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01T 1/20

US Classification:

25037011

Abstract:

Gamma radiation events are received individually at elements of a detector array () at least one of the elements (P) being defective. Each detector element converts incident radiation into a radiation event signal which is digitized by an analog-to-digital converter () into a coordinate position (x,y) on the detector array and energy (z). An event generator () generates radiation event signals for each defective element based on radiation events received at contributing elements, e. g. , nearest neighbor elements (P-P). In a preferred embodiment, the contribution from each of the contributing elements is randomized by passing a token () among positions of a table () corresponding to each of the contributing elements. Each time a radiation event is received at the contributing element whose corresponding table position holds the token, that event also generates an event signal for the defective element and the token is passed (). The energy of the generated event for the defective detector element is randomized (), such as by replacing the least significant bits with random numbers.

US Patent:

20090296813, Dec 3, 2009

Filed:

May 28, 2008

Appl. No.:

12/128050

Inventors:

Atul Garg - Sunnyvale CA, US
Thomas Karpati - San Francisco CA, US
Jackson Lee - Los Altos Hills CA, US
Ignatius Tjandrasuwita - Atherton CA, US

Assignee:

NVIDIA CORPORATION - Santa Clara CA

International Classification:

H04N 11/02
H04B 1/66
H04N 7/12

US Classification:

37524013, 37524014, 375E07147, 375E07146

Abstract:

The following embodiments describe an approach for selecting an intra prediction mode for video encoding, such as occurs in the H.264 standard. One embodiment describes a method of selecting an optimum intra prediction mode. This method involves selecting a first intra prediction mode, which is used to determine a search order for a number of intra prediction modes. These intra prediction modes are then evaluated in order to identify the optimum intra prediction mode.

US Patent:

20100195730, Aug 5, 2010

Filed:

Feb 2, 2009

Appl. No.:

12/364316

Inventors:

Atul Garg - Sunnyvale CA, US
Thomas Karpati - Austin TX, US

Assignee:

NVIDIA CORPORATION - Santa Clara CA

International Classification:

H04N 11/02

US Classification:

37524013, 375E07243

Abstract:

Multi-level prediction mode encoding type decision methods and systems are presented. In one embodiment, an indication of a prediction mode level is received and encoding is performed in accordance with said prediction mode level. The indication of said prediction mode level is programmable and can be set at different levels. The prediction mode level can be associated with a programmable encoding type decision point (e.g., early, intermediate, late, etc.). The encoding process includes deciding upon an I-type or P-type encoding. In one embodiment, a multi-stage encoding type method is also implemented in intra-prediction related search and inter-prediction related search and respective corresponding prediction operations are performed, wherein at least a portion of the intra-prediction related search and the inter-prediction related search are performed in parallel.