Dolby Laboratories Licensing Corporation

Dolby Laboratories Licensing Corproation

David Ruhoff

Alexandros Michael Tourapis

Athanasios Leontaris

Walter J Husak

Gary A Demos

Walter Christian Gish

Jon S McElvain

Christopher J Vogt

Zhen Li

Hyung-Suk Kim

Donald Pian

Kimball Darr Thurston, Iii

Jon Scott Mcelvain

Stereoscopic images are subsampled and placed in a 'checkerboard' pattern in an image. The image is encoded in a monoscopic video format. The monoscopic video is transmitted to a device where the 'checkerboard' is decoded. Portions of the checkerboard (e.g., &#x201c;black&#x201d; portions) are used to reconstruct one of the stereoscopic images and the other portion of the checkerboard (e.g., &#x201c;white&#x201d; portions) are used to reconstruct the other image. The subsamples are, for example, taken from the image in a location coincident to the checkerboard position in which the subsamples are encoded.

Compatible stereoscopic video delivery

Methods, systems, and computer programs for improved quality video compression. Image quality from MPEG-style video coding may be improved by preserving a higher number of bits during intermediate encoding and decoding processing steps. Problems of inverse discrete cosine transform (IDCT) mismatch can be eliminated by exactly matching the IDCT function numerical algorithm of the decoder to the IDCT function numerical algorithm used for the decoding portion of the encoder. Also included is an application of high precision compression to wide dynamic range images by extending the range of the 'quantization parameter' or 'QP'. The extension of QP may be accomplished either by increasing the range of QP directly, or indirectly through a non-linear transformation. Also included is an application of extended intermediate processing precision and an extended QP range to reduced contrast regions of an image to extend the precision with which the low-contrast portions are compression coded.

High precision encoding and decoding of video images

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.

Extending image dynamic range

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.

Spectral synthesis for image capture device processing

Growing community of inventors

Marina Del Rey, CA, United States of America

David Ruhoff