Candace B Anderson

US Patent:

7373013, May 13, 2008

Filed:

Dec 23, 2003

Appl. No.:

10/744721

Inventors:

Candace M. Anderson - Rancho Santa Fe CA, US

Assignee:

General Instrument Corporation - Horsham PA

International Classification:

G06K 9/40

US Classification:

382261, 382260, 382263, 382264, 382275, 358 326, 358 327, 358463

Abstract:

Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. Low pass filtering is applied only along object boundaries and unstructured areas within the image so as to minimize the tendency to blur image edges. Using only four high pass filters to locate horizontal, vertical and diagonal image edges passing through the center of a 3×3 pixel array provides good results.

US Patent:

7437013, Oct 14, 2008

Filed:

Mar 24, 2004

Appl. No.:

10/809022

Inventors:

Candace M. Anderson - Rancho Santa Fe CA, US

Assignee:

General Instrument Corporation - Horsham PA

International Classification:

G06K 9/40

US Classification:

382261, 382260, 382274, 382275, 358 326, 358 327, 358463

Abstract:

A method of reducing spatial noise in an image. Low-pass (smoothing) filters are calculated simultaneously from three successive image rows. Three blocks (m, m, m) are associated with the three successive image rows, and the blocks are processed in row-major order. This implementation is applicable to both luminance and chrominance. The number of smoothing parameters is reduced to one. The technique is applicable to both luminance and chrominance. Directional mapping is used. Extension of the technique to spatial filtering using a 5×5 neighborhood (using five successive image rows) is described. Embodiments of the method using the MMX instruction set are described.

US Patent:

8340343, Dec 25, 2012

Filed:

Oct 31, 2008

Appl. No.:

12/262377

Inventors:

Candace M. Anderson - Rancho Santa Fe CA, US

Assignee:

General Instrument Corporation - Horsham PA

International Classification:

G06K 9/00
G06K 9/46

US Classification:

382100, 382248, 382250

Abstract:

A method and system for embedding and recovering a spatial fingerprint in a sequence of video frames. The sequence includes marked frames that include marked groups having markable positions. The embedding method selects a frame offset and marking period for the marked frames, and determines a marking strength for modifying each marked group. A portion of the spatial fingerprint is embedded in each marked group of a first subgroup of the marked groups, and an ordering of the portion embedded in the first subgroup is embedded in each marked group of a second subgroup of the marked groups. The recovering method analyzes a quality ratio of the DCT transform energy and the residual for each markable position in the frame to determine whether the frame is a marked frame. The recovering method recovers the spatial fingerprint when the marked groups maintain the quality ratio in a number of successive marked frames.

US Patent:

8538069, Sep 17, 2013

Filed:

Dec 18, 2012

Appl. No.:

13/719098

Inventors:

Candace M. Anderson - Rancho Santa Fe CA, US

Assignee:

General Instrument Corporation - Horsham PA

International Classification:

G06K 9/46

US Classification:

382100, 382248, 382250

Abstract:

A method and system for embedding and recovering a spatial fingerprint in a sequence of video frames. The sequence includes marked frames that include marked groups having markable positions. The embedding method selects a frame offset and marking period for the marked frames, and determines a marking strength for modifying each marked group. A portion of the spatial fingerprint is embedded in each marked group of a first subgroup of the marked groups, and an ordering of the portion embedded in the first subgroup is embedded in each marked group of a second subgroup of the marked groups. The recovering method analyzes a quality ratio of the DCT transform energy and the residual for each markable position in the frame to determine whether the frame is a marked frame. The recovering method recovers the spatial fingerprint when the marked groups maintain the quality ratio in a number of successive marked frames.

US Patent:

56066163, Feb 25, 1997

Filed:

Jul 3, 1995

Appl. No.:

8/497880

Inventors:

Eric Sprunk - Carlsbad CA
Paul Moroney - Olivenhain CA
Candace Anderson - Encinitas CA

Assignee:

General Instrument Corporation of Delaware - Chicago IL

International Classification:

H04L 900
H04L 906

US Classification:

380 29

Abstract:

Apparatus is provided for authenticating information using a double feedforward hash function to provide complementarity in the implementation of an encryption algorithm. A cryptographic processor has a first input for receiving plaintext, a second input for receiving a key and an output for outputting ciphertext generated by cryptographically processing the plaintext and key. A first circuit element is responsive to the ciphertext and plaintext for outputting a first ciphertext derivative. A second circuit element is responsive to at least a portion of the first ciphertext derivative and the key for outputting a second ciphertext derivative. The first and second circuit elements can be XOR gates. Alternatively, these elements can be provided using lookup tables. Subsequent cryptographic processor stages can be provided having a first input for receiving second plaintext, a second input for receiving the second ciphertext derivative as a key, and an output for outputting second ciphertext generated by cryptographically processing the second plaintext and the second ciphertext derivative.

US Patent:

6115072, Sep 5, 2000

Filed:

Jan 27, 1999

Appl. No.:

9/238958

Inventors:

Bao Vuong - San Diego CA
Candace Anderson - Rancho Santa Fe CA

Assignee:

Motorola, Inc. - Schaumburg IL
General Instrument Corporation - Horsham PA

International Classification:

H04N 701

US Classification:

348445

Abstract:

A method and apparatus for converting a digital video image to a higher aspect ratio format at a decoder by line dropping. For example, conversion from a 4:3 to a 16:9 letterbox format may be achieved. Line dropping for non-anchor pictures (e. g. , B-pictures) occurs on a decoding-side of the decoder, prior to storage in memory. Line dropping for anchor pictures (e. g. , I- and P-pictures) occurs on a display-side of the decoder, after being retrieved from the memory, and prior to display. Additional memory space is freed to allow storage of additional decoded data, thus compensating for the decrease in display processing time caused by a reduced number of active video lines that are processed with the letter box format.