Dolby Laboratories Patent Grants

Electronic device

Granted: April 25, 2017
Patent Number: D784963

Backlight simulation at reduced resolutions to determine spatial modulation of light for high dynamic range images

Granted: April 25, 2017
Patent Number: 9633587
Embodiments of the invention relate generally to generating images with an enhanced range of brightness levels, and more particularly, to facilitating high dynamic range imaging by adjusting pixel data and/or using predicted values of luminance, for example, at different resolutions. In at least one embodiment, a method generates an image with an enhanced range of brightness levels. The method can include accessing a model of backlight that includes data representing values of luminance…

Acquisition, recovery, and matching of unique information from file-based media for automated file detection

Granted: April 25, 2017
Patent Number: 9635417
A media fingerprint archive system generates and archives media fingerprints from second media content portions such as commercials. A downstream media measurement system can extract/derive query fingerprints from an incoming signal, and query the media fingerprint archive system whether any of the query fingerprints matches any archived fingerprints. If so, the media measurement system can perform media measurements on a specific secondary media content portion from which the matched…

Systems and methods for reduced bit-depth processing in video-related data with frequency weighting matrices

Granted: April 18, 2017
Patent Number: RE46370
Embodiments of the present invention comprise systems and methods for processing of data related to video wherein reduced bit depth intermediate calculations are enabled.

Dynamic range control for a wide variety of playback environments

Granted: April 18, 2017
Patent Number: 9626149
In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are…

Projection display providing additional modulation and related methods

Granted: April 18, 2017
Patent Number: 9626921
A projection display system includes a spatial modulator that is controlled to compensate for flare in a lens of the projector. The spatial modulator increases achievable intra-frame contrast and facilitates increased peak luminance without unacceptable black levels. Some embodiments provide 3D projection systems in which the spatial modulator is combined with a polarization control panel.

Speaker identification using spatial information

Granted: April 18, 2017
Patent Number: 9626970
Embodiments of the present invention relate to speaker identification using spatial information. A method of speaker identification for audio content being of a format based on multiple channels is disclosed. The method comprises extracting, from a first audio clip in the format, a plurality of spatial acoustic features across the multiple channels and location information, the first audio clip containing voices from a speaker, and constructing a first model for the speaker based on the…

Method for improving perceptual continuity in a spatial teleconferencing system

Granted: April 18, 2017
Patent Number: 9628630
The present document relates to audio conference systems. In particular, the present document relates to improving the perceptual continuity within an audio conference system. According to an aspect, a method for multiplexing first and second continuous input audio signals is described, to yield a multiplexed output audio signal which is to be rendered to a listener. The first and second input audio signals (123) are indicative of sounds captured by a first and a second endpoint (120,…

Method and system for generating a transform size syntax element for video decoding

Granted: April 18, 2017
Patent Number: 9628801
In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4.×.4 or an 8.×.8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks,…

Method and system for generating a transform size syntax element for video decoding

Granted: April 18, 2017
Patent Number: 9628802
In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4.×.4 or an 8.×.8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks,…

Encoding perceptually-quantized video content in multi-layer VDR coding

Granted: April 18, 2017
Patent Number: 9628808
Input VDR images are received. A candidate set of function parameter values for a mapping function is selected from multiple candidate sets. A set of image blocks of non-zero standard deviations in VDR code words in at least one input VDR image is constructed. Mapped code values are generated by applying the mapping function with the candidate set of function parameter values to VDR code words in the set of image blocks in the at least one input VDR image. Based on the mapped code…

Telecommunications device

Granted: April 18, 2017
Patent Number: 9628887
A telecommunications device (1) comprises a base part (2), a cap part (4), a body part (3), a control panel (5), an upper light ring (9), a lower light ring (8), a plurality of sound microphones and a plurality of sound speakers. The cap part (4) is concave in shape. The body part (3) is frusto-conical in shape and tapers outwardly away from the cap part (4) towards the base part (2). The body part (3) and the cap part (4) cover the sound microphones and the sound speakers. The control…

Method for rendering multi-channel audio signals for L1 channels to a different number L2 of loudspeaker channels and apparatus for rendering multi-channel audio signals for L1 channels to a different number L2 of loudspeaker channels

Granted: April 18, 2017
Patent Number: 9628933
Multi-channel audio content is mixed for a particular loudspeaker setup. However, a consumer's audio setup is very likely to use a different placement of speakers. The present invention provides a method of rendering multi-channel audio that assures replay of the spatial signal components with equal loudness of the signal. A method for obtaining an energy preserving mixing matrix (G) for mixing L1 input audio channels to L2 output channels comprises steps of obtaining (s711) a first…

Audio channel spatial translation

Granted: April 18, 2017
Patent Number: 9628934
M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is…

Dynamic range control for a wide variety of playback environments

Granted: April 11, 2017
Patent Number: 9619199
In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are…

Alignment and re-association of metadata for media streams within a computing device

Granted: April 11, 2017
Patent Number: 9619559
Techniques for re-associating dynamic metadata with media data are provided. A media processing system creates, with a first media processing stage, binding information comprising dynamic metadata and a time relationship between the dynamic metadata and media data. The binding information may be derived from the media data. While the first media processing stage delivers the media data to a second media processing stage in a first data path, the first media processing stage passes the…

Decoding of multichannel audio encoded bit streams using adaptive hybrid transformation

Granted: April 11, 2017
Patent Number: 9620132
The processing efficiency of a process used to decode frames of an enhanced AC-3 bit stream is improved by processing each audio block in a frame only once. Audio blocks of encoded data are decoded in block order rather than in channel order. Exemplary decoding processes for enhanced bit stream coding features such as adaptive hybrid transform processing and spectral extension are disclosed.

Equalizer controller and controlling method

Granted: April 11, 2017
Patent Number: 9621124
Equalizer controller and controlling method are disclosed. In one embodiment, an equalizer controller includes an audio classifier for identifying the audio type of an audio signal in real time; and an adjusting unit for adjusting an equalizer in a continuous manner based on the confidence value of the audio type as identified.

Enabling delivery and synchronization of auxiliary content associated with multimedia data using essence-and-version identifier

Granted: April 11, 2017
Patent Number: 9621963
Essence of a media program can be encoded such that it carries essence identification information and a set of time points. Auxiliary content such as companion content and other auxiliary data can be associated with the essence of the media program by way of the set of time points. The set of time points and/or fingerprints used to retrieve/recover the set of time points can be delivered to one or more of a media device, a companion device/application, etc., in any of a variety of…

Method and system for head-related transfer function generation by linear mixing of head-related transfer functions

Granted: April 11, 2017
Patent Number: 9622006
A method for performing linear mixing on coupled Head-related transfer functions (HRTFs) to determine an interpolated HRTF for any specified arrival direction in a range (e.g., a range spanning at least 60 degrees in a plane, or a full range of 360 degrees in a plane), where the coupled HRTFs have been predetermined to have properties such that linear mixing can be performed thereon (to generate interpolated HRTFs) without introducing significant comb filtering distortion. In some…