Dolby Laboratories

About: Dolby Laboratories is a company organization based out in Amsterdam, Netherlands. It is known for research contribution in the topics: Audio signal & Audio signal flow. The organization has 956 authors who have published 1726 publications receiving 29456 citations.

Predicting and verifying regions of interest selections

Abstract: Video images are rendered in viewports of content viewers. Each content viewer views video images through a respective viewport in the viewports. Spatial locations in the video images to which foveal visions of the content viewers are directed are determined. ROIs in the video images are identified based on the spatial locations in the video images.

Displays with a backlight incorporating reflecting layer

Abstract: Displays comprise light control layers (16) in an optical path between a light source (12), such as an array of light emitting diodes and a spatial light modulator (14) such as a liquid crystal display panel. The light control layer comprises an enhanced specular reflector (ESR, 16a) film in optical contact to at least one layer of a transparent or translucent material (16B, 16C). The light control layer transmits light from the light source more readily than the ESR film standing on its own. In some embodiments the display may provide enhanced contrast and peak luminance.

Reconstructing audio signals with multiple decorrelation techniques

Abstract: A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel. The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.

A low complexity architecture for video coding with overlapped block motion compensation

Abstract: Video coding standards, such as H.264/MPEG-4 AVC, have adopted the hybrid codec paradigm that consists of intra and inter prediction, followed by transform and quantization of the prediction residual. Inter prediction uses block-based motion compensation (BMC) to predict samples in the current picture. BMC, however, suffers from blocking artifacts and discontinuities. Along with deblocking, overlapped block motion compensation (OBMC) has been proposed in the past, primarily to suppress blocking artifacts. However, issues that include decoding complexity and implementation have been impediments to practical applications of OBMC. Here1, we propose a new decoder- and encoder-friendly architecture for inter prediction with OBMC. Furthermore, we show preliminary experimental results that point to coding efficiency gains over the BMC architecture of H.264/MPEG-4 AVC.

Encoding and decoding reversible production-quality single-layer video signals

Abstract: A tone-mapping function that maps input images of a high dynamic range into reference tone-mapped images of a relatively narrow dynamic range is generated. A luma forward reshaping function is derived, based on first bit depths and second bit depths, for forward reshaping luma codewords of the input images into forward reshaped luma codewords of forward reshaped images approximating the reference tone-mapped images. A chroma forward reshaping mapping is derived for predicting chroma codewords of the forward reshaped images. Backward reshaping metadata that is to be used by recipient devices to generate a luma backward reshaping function and a chroma backward reshaping mapping is transmitted with the forward reshaped images to the recipient devices. Techniques for the joint derivation of forward luma and chroma reshaping functions are also presented.