Ann C Irvine

US Patent:

7061404, Jun 13, 2006

Filed:

Nov 17, 2003

Appl. No.:

10/715573

Inventors:

Ann C. Irvine - Bonsall CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H03M 7/00

US Classification:

341 50, 341 51

Abstract:

An apparatus and method for generating multiple descriptions of compressed data are comprised. Generally, a quantized bit stream is generated using a reference quantization step. The quantized bit stream is then re-quantized using a first quantization step to generate a first description of compressed data, wherein the first quantization step is determined based on a first required scaling of the reference quantization step. The quantized bit stream may also be re-quantized using a second quantization step to generate a second description of compressed data, wherein the second quantization step is determined based on a second required scaling of the reference quantization step.

US Patent:

7203319, Apr 10, 2007

Filed:

Jul 9, 2001

Appl. No.:

09/902173

Inventors:

Liat Ben-Zur - San Diego CA, US
Christopher Wingert - San Diego CA, US
Paul Pomes - Urbana IL, US
Jesse Hose - Carlsbad CA, US
Ann C. Irvine - Bonsall CA, US
Senthil Govindaswamy - San Diego CA, US

Assignee:

Qualcomm, Inc. - San Diego CA

International Classification:

H04L 9/00

US Classification:

380283, 380284, 380278

Abstract:

An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.

US Patent:

7412100, Aug 12, 2008

Filed:

Sep 2, 2004

Appl. No.:

10/933618

Inventors:

Vijayalakshmi R. Raveendran - San Diego CA, US
Ann Chris Irvine - Bonsall CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382233, 382240, 382250, 382251, 382299, 382305, 37524021, 37524018

Abstract:

A method of receiving a bit-stream and extracting data from the bit-stream based on one or more criteria and sub-sampling (for example, filtering and decimating) the extracted data in the transform domain. The method either stores the data for future transmission or transmits the data to one or more connected devices, such as a mobile terminal or a fixed terminal.

US Patent:

7483581, Jan 27, 2009

Filed:

Jun 26, 2002

Appl. No.:

10/180828

Inventors:

Vijayalakshmi R. Raveendran - San Diego CA, US
Kadayam Thyagarajan - San Diego CA, US
Dianne Ratzel, legal representative - San Diego CA, US
Steven A. Morley - San Diego CA, US
Ann Chris Irvine - Bonsall CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382236, 382244, 382245, 382246, 382250, 382251

Abstract:

A method of losslessly compressing and encoding signals representing image information is claimed. A lossy compressed data file and a residual compressed data file are generated. When the lossy compressed data file and the residual compressed data file are combined, a lossless data file that is substantially identical to the original data file is created.

US Patent:

7561073, Jul 14, 2009

Filed:

Apr 26, 2006

Appl. No.:

11/412568

Inventors:

Ann C. Irvine - Bonsall CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03M 7/00

US Classification:

341 50, 341 51

Abstract:

An apparatus and method for generating multiple descriptions of compressed data are comprised. Generally, a quantized bit stream is generated using a reference quantization step. The quantization bet stream is then re-quantized using a first quantization step to generate a first description of compressed data, wherein the first quantization step is determined based on a first required scaling of the reference quantization step. The quantized bit stream may also be re-quantized using a second quantization step to generate a second description of compressed data, wherein the second quantization step is determined on a second required scaling of the reference quantization step.

US Patent:

7564382, Jul 21, 2009

Filed:

Nov 17, 2003

Appl. No.:

10/715572

Inventors:

Ann C. Irvine - Bonsall CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03M 7/00

US Classification:

341107, 382239

Abstract:

Apparatus and method for generating multiple descriptions of compressed data is disclosed. In the apparatus and method, transform coefficients are generated from input data and quantized. An energy distribution of the quantized transform coefficients is generated. Based on the energy distribution, the transform coefficients are grouped into layers. By entropy coding different number of layers, multiple descriptions of compressed data are generated.

US Patent:

7596277, Sep 29, 2009

Filed:

Apr 7, 2003

Appl. No.:

10/409296

Inventors:

Senthil Govindaswamy - San Diego CA, US
Ann C. Irvine - Bonsall CA, US
John Ratzel - San Diego CA, US

International Classification:

G06K 9/36
G06K 9/46
H04N 11/02

US Classification:

382232, 37524027

Abstract:

An apparatus and method for the detection of errors in compressed digital image is disclosed. In one embodiment, a signature is generated using a multiple input shift register and added to the compressed information. The signature is verified at the decoder to detect an error in the compressed information. Other information such as the frame number and/or color component type of the compressed image can also be verified to detect errors in the compressed information. In other embodiments, the decoder detects errors if there are bits remaining after decompression and/or if there are invalid codes at decompression. Once an error is detected, the compressed information can be discarded or re-sent and processed. Therefore, the detection of errors can significantly enhance at least the reliance of systems such as digital cinema that require compression of large amounts of data.

US Patent:

7630563, Dec 8, 2009

Filed:

Jul 18, 2002

Appl. No.:

10/199899

Inventors:

Ann C. Irvine - Bonsall CA, US
Kadayam Thyagarajan - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06K 9/36

US Classification:

382232, 382250

Abstract:

A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data file is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values. The DC values and the AC values are inverse quantized to produce lossy, decompressed data. The residual compressed data file is decoded to produce a residual decompressed data. The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.