Christopher J Vogt

US Patent:

8259795, Sep 4, 2012

Filed:

Aug 24, 2011

Appl. No.:

13/216836

Inventors:

Walter C. Gish - Oak Park CA, US
Christopher J. Vogt - Laguna Niguel CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 7/12

US Classification:

37524003, 37524001, 37524002, 37524004, 37524005, 37524025, 37524026

Abstract:

The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i. e. , the same QP).

US Patent:

8457208, Jun 4, 2013

Filed:

Dec 19, 2008

Appl. No.:

12/746834

Inventors:

Walter Gish - Oak Park CA, US
Christopher Vogt - Laguna Niguel CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 7/36

US Classification:

37524016, 37524015

Abstract:

Optimal error metric function for motion estimation is determined and used for video coding and/or video processing of images. To do so, an initial motion estimation using an initial error metric function can be performed. This can produce motion prediction errors. If the initial error metric function is not the optimal error function, then a final motion estimation is performed using a selected optimal error metric function. In some embodiments, a shape of error distribution can be used to determine the optimal error metric function. Some example systems or devices for this motion estimation can include systems or devices for compression, temporal interpolation, and/or super-resolution processing.

US Patent:

8548047, Oct 1, 2013

Filed:

Aug 2, 2012

Appl. No.:

13/565278

Inventors:

Walter C. Gish - Oak Park CA, US
Christopher J. Vogt - Laguna Niguel CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 7/12
H04N 11/02
H04N 11/04

US Classification:

37524003, 37524001, 37524002, 37524026

Abstract:

The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i. e. , the same QP).

US Patent:

8615041, Dec 24, 2013

Filed:

Sep 4, 2013

Appl. No.:

14/017618

Inventors:

Christopher J. Vogt - Laguna Niguel CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 7/12

US Classification:

37524003, 37524001, 37524002, 37524005, 37524025, 37524004, 37524026

Abstract:

The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i. e. , the same QP).

US Patent:

20060257034, Nov 16, 2006

Filed:

May 11, 2005

Appl. No.:

11/128125

Inventors:

Walter Gish - Oak Park CA, US
Christopher Vogt - Omaha NE, US

International Classification:

G06K 9/36
G06K 9/00

US Classification:

382239000, 382251000

Abstract:

The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSof the quantization parameter QP, which function QShas been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth—a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).

US Patent:

20110194618, Aug 11, 2011

Filed:

Apr 21, 2011

Appl. No.:

13/091311

Inventors:

Walter Gish - Oak Park CA, US
Zhen Li - Cupertino CA, US
Christopher Vogt - Laguna Niguel CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 7/26

US Classification:

37524025, 375E07027

Abstract:

A first image stream has a first dynamic range and a first color space. First and the second image streams are received in a layered codec. The second image stream has a second dynamic range, which is higher than the first dynamic range. The first image stream is in the codec's base layer; the second image stream is in its enhancement layer. The first image stream is encoded to obtain an encoded image stream, which is decoded to obtain a decoded image stream. The decoded image stream is converted from the first non-linear or linear color space to a second, different color space to obtain a color converted image stream. A higher dynamic range image representation of the color converted image stream is generated to obtain a transformed image stream. Inverse tone mapping parameters are generated based on the transformed image stream and the second image stream.

US Patent:

20130148029, Jun 13, 2013

Filed:

Aug 23, 2011

Appl. No.:

13/818288

Inventors:

Walter Gish - Oak Park CA, US
Zhen Li - Cupertino CA, US
Donald Pian - San Diego CA, US
Christopher Vogt - Laguna Niguel CA, US
Hyung-Suk Kim - Valencia CA, US
David Ruhoff - Marina del Rey CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 9/67

US Classification:

348708

Abstract:

Enhancing image dynamic range is described. An input video signal that is represented in a first color space with a first color gamut, which is related to a first dynamic range, is converted to a video signal that is represented in a second color space with a second color gamut. The second color space is associated with a second dynamic range. At least two (e.g., three) color-related components of the converted video signal are mapped over the second dynamic range.

US Patent:

20140022410, Jan 23, 2014

Filed:

Sep 27, 2013

Appl. No.:

14/039415

Inventors:

David Ruhoff - Marina del Rey CA, US
Jon S. McElvain - Manhattan Beach CA, US
Christopher J. Vogt - Laguna Niguel CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 9/73

US Classification:

3482231

Abstract:

A substantially rectangular spectral representation is synthesized, which is adapted to produce image capture device sensor outputs if applied to an image capture device. The synthesized substantially rectangular spectral representation can be utilized in generating output color values of an output color space from image capture device sensor outputs, where the image capture device sensor outputs correspond to an image captured by an image capture device. The generated output color values correspond to colors perceived by the human visual system for the same image as that captured by the image capture device. Image capture device gamut is also determined.

Author:

Christopher P. Vogt

ISBN #:

0742531856

Author:

Christopher P. Vogt

ISBN #:

0742531864

Author:

Christopher E. Vogt

ISBN #:

0761503382

Author:

Christopher E. Vogt

ISBN #:

0788156713