Dolby Laboratories Patent Grants

Method of packaging and package of fixed-temple eyewear

Granted: January 17, 2017
Patent Number: 9546031
A novel method of packaging fixed-temple eyewear includes arranging a first plurality of pairs of fixed-temple eyewear in a first arrangement with the lenses of the eyewear lying substantially in the same plane. The right temples of the eyewear are aligned along a first line and the left temples of the eyewear are aligned along a second line. The first plurality of pairs of eyewear is held in the first arrangement with a first portion of packaging material. Second and third pluralities…

Method and system for shaped glasses and viewing 3D images

Granted: January 17, 2017
Patent Number: 9547179
Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3D image viewed through the shaped glasses. In one embodiment, the spectrally complementary filters are disposed on the curved lenses with increasing…

Methods and apparatus for detecting a repetitive pattern in a sequence of audio frames

Granted: January 17, 2017
Patent Number: 9547715
Methods and apparatus for detecting a repetitive pattern in a sequence of audio frames are described. Similarity values of a first similarity matrix with first resolution for the sequence are calculated. An adaptive threshold is estimated from the similarity values for classifying the similarity values into repetition or non-repetition. For each of one or more offsets of a second similarity matrix with second resolution higher that the first resolution, similarity values of the second…

Method and apparatus for adjusting drive values for dual modulation displays

Granted: January 17, 2017
Patent Number: 9548028
Method and apparatus are provided for determining and adjusting drive values for a display comprising light source modulation layer such as a backlight array of LED and a display modulation layer such as an LCD panel. Image regions for which any of the display modulation layer drive values are above a predetermined threshold maximum value or below a predetermined threshold minimum value are flagged. The light source modulation layer control values determined for a subsequent frame of…

Method and apparatus for acoustic echo control

Granted: January 17, 2017
Patent Number: 9548063
Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold…

Volume leveler controller and controlling method

Granted: January 17, 2017
Patent Number: 9548713
Volume leveler controller and controlling method are disclosed. In one embodiment, A volume leveler controller includes an audio content classifier for identifying the content type of an audio signal in real time; and an adjusting unit for adjusting a volume leveler in a continuous manner based on the content type as identified. The adjusting unit may configured to positively correlate the dynamic gain of the volume leveler with informative content types of the audio signal, and…

Network-synchronized media playback

Granted: January 17, 2017
Patent Number: 9549027
In a system that includes two or more computing systems connected to a computer network, a network control and synchronization (NetSync) application controls the in-sync playback of media files across different computing systems in the network, where each computing system is playing a local version of a media file using a local instance of a Media player. The NetSync application receives status messages from all Media players and controls the playback of all media files by sending them…

Multi-field CCD capture for HDR imaging

Granted: January 17, 2017
Patent Number: 9549123
Techniques are described to combine image data from multiple images with different exposures into a relatively high dynamic range image. A first image of a scene may be generated with a first operational mode of an image processing system. A second image of the scene may be generated with a second different operational mode of the image processing system. The first image may be of a first spatial resolution, while the second image may be of a second spatial resolution. For example, the…

Context based inverse mapping method for layered codec

Granted: January 17, 2017
Patent Number: 9549194
Context based inverse mapping methods are provided. An image with pixel values within a lower dynamic range can be mapped to an image with pixel values within a higher dynamic range by utilizing context information associated with pixels in the lower dynamic range image.

Visual dynamic range timestamp to enhance data coherency and potential of metadata using delay information

Granted: January 17, 2017
Patent Number: 9549197
A system and method for enhancing data coherency and potential of at least one metadata associated with a video data configured to operate in a visual dynamic range (VDR) format are detailed. One system embodiment employs a metadata framing structure which includes a header start of frame bit set, a packet type bit set, a configuration bit set, a variable depth configuration/metadata bit set, a header end of frame bit set, a timestamp bit set for specifying a frame delay count to apply…

Region sizing for macroblocks

Granted: January 17, 2017
Patent Number: 9549201
Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of…

Backward-compatible coding for ultra high definition video signals with enhanced dynamic range

Granted: January 17, 2017
Patent Number: 9549207
Video data with both ultra-high definition (UHD) resolution and high or enhanced dynamic range (EDR) data are coded in a backward-compatible layered stream which allows legacy decoders to extract an HD standard dynamic range (SDR) signal. In response to a base layer HD SDR signal, a predicted signal is generated using separate luma and chroma prediction models. In the luma predictor, luma pixel values of the predicted signal are computed based only on luma pixel values of the base layer,…

System and tools for enhanced 3D audio authoring and rendering

Granted: January 17, 2017
Patent Number: 9549275
Improved tools for authoring and rendering audio reproduction data are provided. Some such authoring tools allow audio reproduction data to be generalized for a wide variety of reproduction environments. Audio reproduction data may be authored by creating metadata for audio objects. The metadata may be created with reference to speaker zones. During the rendering process, the audio reproduction data may be reproduced according to the reproduction speaker layout of a particular…

Techniques for localized perceptual audio

Granted: January 10, 2017
Patent Number: 9544527
Audio perception in local proximity to visual cues is provided. A device includes a video display, first row of audio transducers, and second row of audio transducers. The first and second rows can be vertically disposed above and below the video display. An audio transducer of the first row and an audio transducer of the second row form a column to produce, in concert, an audible signal. The perceived emanation of the audible signal is from a plane of the video display (e.g., a location…

Stereoscopic dual modulator display device using full color anaglyph

Granted: January 10, 2017
Patent Number: 9544579
Systems and methods are provided for displaying three-dimensional image data on a display having a light source modulation layer and a display modulation layer. The light source modulation layer has light sources for providing spatially modulated, spectrally separated light for displaying time-multiplexed left and right eye images. The display modulation layer has pixels for spatially modulating the amount of light received from the light source modulation layer.

Decoding and display of high dynamic range video

Granted: January 3, 2017
Patent Number: 9538155
Novel methods and systems for decoding and displaying enhanced dynamic range (EDR) video signals are disclosed. To accommodate legacy digital media players with constrained computational resources, compositing and display management (DM) operations are moved from a digital media player to its attached EDR display. On a video receiver, base and enhancement video layers are decoded and multiplexed together with overlay graphics into an interleaved stream. The video and graphics signals are…

Pre-processing for bitdepth and color format scalable video coding

Granted: January 3, 2017
Patent Number: 9538176
Methods for scalable video coding are described. Such methods can be used to deliver video contents in Low Dynamic Range (LDR) and/or one color format and then converting the video contents to High Dynamic Range (HDR) and/or a different color format, respectively, while pre-processing video content.

Bitstream syntax for spatial voice coding

Granted: December 27, 2016
Patent Number: 9530422
An encoding system (100) encodes a first (E1) and further (E2, E3) audio signals as a layered bitstream (B), wherein a quantizer for each frequency band of each signal is selected using a rate allocation rule based on signal-specific rate allocation data, a spectral envelope of the signal and a reference level (EnvE1Max), which is determined based on the spectral envelope of the first signal and is not necessarily included in the bitstream. Further disclosed is a decoding system for…

Multiple stage modulation projector display systems having efficient light utilization

Granted: December 27, 2016
Patent Number: 9531982
Dual or multi-modulation display systems comprising a first modulator and a second modulator are disclosed. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the first and second modulator. The display system may render highlight features within a projected image by affecting a time multiplexing…

Color grading apparatus and methods

Granted: December 27, 2016
Patent Number: 9532022
A method for color grading input video data for display on a target display comprises obtaining target display metadata indicative of a capability of the target display, obtaining input video data metadata indicative of image characteristics of the input video data, automatically determining initial values for parameters of a parameterized sigmoidal transfer function, at least one of the initial values based at least in part on at least one of the target display metadata and the input…