Dolby Labs Patents Granted

Dolby Labs patent applications that are pending before the United States Patent and Trademark Office (USPTO).

  • Patent number: 9871912
    Abstract: In a conference call having a plurality of participants interacting in a conference exchange of information in a digital transmission environment, the interaction being across a variable network transmission resource, a method of allocating the level of transmission resource, the methods including the steps of: (a) monitoring predetermined aspects of the participant's behavior during the conference call; (b) determining a divergence of participants behavior from normative values; (c) utilizing any divergence as an indicator of aberrant operation of the participants; and (d) allocating the resource determinative on the divergence of participants behavior from normative values.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: January 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Kai Li, Glenn N. Dickins, Xuejing Sun
  • Patent number: 9872033
    Abstract: An encoder receives one or more input pictures of enhanced dynamic range (EDR) to be encoded in a coded bit stream comprising a base layer and one or more enhancement layers. To encode the chroma pixels, the encoder generates a luma mask and a corresponding chroma mask. Based on generated high-clipping and low-clipping thresholds, the encoder determines the appropriate parameters to encode the chroma values in the base and enhancement layers.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: January 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qian Chen, Sheng Qu
  • Patent number: 9872024
    Abstract: An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: January 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Shawmin Lei, Hiroyuki Katata
  • Patent number: 9865275
    Abstract: The document relates to modulated digital filter banks, as well as to methods and systems for the design of such filter banks. In particular, the document discloses a method comprising accessing a time-domain audio signal and applying a first filter bank to the time-domain audio signal, thereby producing a first plurality of subbands of frequency-domain audio data representative of at least a part of the audio signal. The filter bank comprises an decimated modulated filter bank obtained from an asymmetric prototype filter. The method further comprises applying a second filter bank to at least a first subband of the first plurality of subbands of frequency-domain audio data, thereby producing a second plurality of subbands of frequency-domain audio data representative of at least a part of the audio signal. The second modulated filter bank comprises an asymmetric modulated filter bank which includes no decimation.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: January 9, 2018
    Assignee: Dolby International AB
    Inventors: Per Ekstrand, Nicholas Luke Appleton
  • Patent number: 9866834
    Abstract: An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Shawmin Lei, Hiroyuki Katata
  • Patent number: 9866734
    Abstract: A scene change is determined using a first and a second video signal, each representing the same scene or content, but at a different color grade (such as dynamic range). A set of prediction coefficients is generated to generate prediction signals approximating the first signal based on the second signal and a prediction model. A set of prediction error signals is generated based on the prediction signals and the first signal. Then, a scene change is detected based on the characteristics of the prediction error signals. Alternatively, a set of entropy values of the difference signals between the first and second video signals are computed, and a scene change is detected based on the characteristics of the entropy values.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Seyedalireza Golestaneh, Guan-Ming Su
  • Patent number: 9866856
    Abstract: A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: January 9, 2018
    Assignee: Dolby International AB
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 9864243
    Abstract: A display provides increased contrast and resolution via first LCD panel energized to generate an image and a second LCD panel configured to increase contrast of the image. The second panel is an LCD panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images (making them blacker or darker) using polarization rotation and filtration. Preferably, the second LCD panel is of higher resolution than the first LCD panel. The panels may be directly illuminated or edge lit, and may be globally or locally dimmed monochrome or multi primary lights that may also include individual control of color intensities for each image or frame displayed. The panels may be placed in any order, but preferably are arranged such that active layers in each panel are as close together as possible. Brightness is maintained by the combination of reusing polarization between the panels and by not going through more than one set of color filters.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gopal Erinjippurath, John Gilbert
  • Patent number: 9866681
    Abstract: In an conferencing system in which a plurality of communication devices electronically connect respective participants to one another, a method for mitigating the effects of substantially concurrent audio bursts from two or more of the participants includes identifying a priority attribute associated with each of multiple substantially concurrent audio bursts, comparing the identified priority attributes, and electronically suppressing at least one audio burst as a function of the comparison.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. Dickins, Brendon Costa, James Zealey, Jeremy Pascal Brun
  • Patent number: 9865271
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: January 9, 2018
    Assignee: Dolby International AB
    Inventors: Fredrik Henn, Kristofer Kjoerling, Lars G. Liljeryd, Karl Jonas Roeden, Jonas Engdegard
  • Patent number: 9864232
    Abstract: A light source includes a light reflector and multi-pixel light modulators. The light reflector is surrounded with reflective surfaces. Light can be injected into the light reflector and diffused throughout the light reflector. The multi-pixel light modulators have individual transmittance states based on image data to modulate light that illuminates multi-pixel portions of a light receiving surface.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Ajit Ninan
  • Patent number: 9866191
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Patent number: 9866866
    Abstract: 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, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Stephen Gordon, Douglas Chin
  • Patent number: 9866813
    Abstract: Representation and coding of multi-view images are carried out through tapestry encoding. A tapestry comprises information on a tapestry image, a left-shift displacement map and a right-shift displacement map. Perspective images of a scene can be generated from the tapestry and the displacement maps. The tapestry image is generated from a leftmost view image, a rightmost view image, a disparity map and an occlusion map.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gregory John Ward, Timo Kunkel, Scott Daly
  • Patent number: 9858936
    Abstract: In some embodiments, a method for selecting at least one layer of a spatially layered, encoded audio signal. Typical embodiments are teleconferencing methods in which at least one of a set of nodes (endpoints, each of which is a telephone system, and optionally also a server) is configured to perform audio coding in response to soundfield audio data to generate spatially layered encoded audio including any of a number of different subsets of a set of layers, the set of layers including at least one monophonic layer, at least one soundfield layer, and optionally also at least one metadata layer comprising metadata indicative of at least one processing operation to be performed on the encoded audio. Other aspects are systems configured (e.g., programmed) to perform any embodiment of the method, and computer readable media which store code for implementing any embodiment of the method or steps thereof.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: January 2, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Richard James Cartwright, Glenn Dickins
  • Patent number: 9858932
    Abstract: Embodiments are directed to a method of representing spatial rendering metadata for processing in an object-based audio system that allows for lossless interpolation and/or re-sampling of the metadata. The method comprises time stamping the metadata to create metadata instances, and encoding an interpolation duration to with each metadata instance that specifies the time to reach a desired rendering state for the respective metadata instance. The re-sampling of metadata is useful for re-clocking metadata to an audio coder and for the editing audio content.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: January 2, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Brian George Arnott, Dirk Jeroen Breebaart, Antonio Mateos Sole, David S. McGrath, Heiko Purnhagen, Freddie Sanchez, Nicolas R. Tsingos
  • Patent number: 9858945
    Abstract: The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: January 2, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 9858940
    Abstract: In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: January 2, 2018
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9852735
    Abstract: There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary encoding method includes inter alia calculating M downmix signals by forming combinations of N audio objects, wherein M?N, and calculating parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M downmix signals. The calculation of the M downmix signals is made according to a criterion which is independent of any loudspeaker configuration.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 26, 2017
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Kristofer Kjoerling, Toni Hirvonen, Lars Villemoes, Dirk Jeroen Breebaart
  • Patent number: 9854242
    Abstract: A method for decoding video includes receiving quantized coefficients representative of a block of video representative of a plurality of pixels. The quantized coefficients are dequantized based upon a function of a remainder. The dequantized coefficients are inverse transformed to determine a decoded residue.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: December 26, 2017
    Assignee: Dolby International AB
    Inventors: Louis J. Kerofsky, Kiran Misra, Christopher A. Segall
  • Patent number: 9852722
    Abstract: The invention relates to estimating tempo information directly from a bitstream encoding audio information, preferably music. Said tempo information is derived from at least one periodicity derived from a detection of at least two onsets included in the audio information. Such onsets are detected via a detection of long to short block transitions (in the bitstream) or/and via a detection of a changing bit allocation (change of cost) regarding encoding/transmitting the exponents of transform coefficients encoded in the bitstream.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: December 26, 2017
    Assignee: Dolby International AB
    Inventor: Arijit Biswas
  • Patent number: 9854378
    Abstract: An audio spatial rendering apparatus and method are disclosed. In one embodiment, The audio spatial rendering apparatus includes a rendering unit for spatially rendering an audio stream so that the reproduced far-end sound is perceived by a listener as originating from at least one virtual spatial position, a real position obtaining unit for obtaining a real spatial position of a real sound source, a comparator for comparing the real spatial position with the at least one virtual spatial position; and an adjusting unit for, where the real spatial position is within a predetermined range around at least one virtual spatial position, or vice versa, adjusting the parameters of the rendering unit so that the at least one virtual spatial position is changed.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: December 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Gary Spittle
  • Patent number: 9847089
    Abstract: The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: December 19, 2017
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Patent number: 9848272
    Abstract: An encoding system encodes multiple audio signals (X) as a downmix signal (Y) together with wet and dry upmix coefficients (P, C). In a decoding system, a pre-multiplier (101) computes an intermediate signal (W) by mapping the downmix signal linearly in accordance with a first set of coefficients (Q); a decorrelating section (102) outputs a decorrelated signal (Z) based on the intermediate signal; a wet upmix section (103) computes a wet upmix signal by mapping the decorrelated signal linearly in accordance with the wet upmix coefficients; a dry upmix section (104) computes a dry upmix signal by mapping the downmix signal linearly in accordance with the dry upmix coefficients; a combining section (105) provides a multidimensional reconstructed signal (X) by combining the wet and dry upmix signals; and a converter (106) computes the first set of coefficients based on the wet and dry upmix coefficients and supplies this to the pre-multiplier.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: December 19, 2017
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Toni Hirvonen, Heiko Purnhagen
  • Patent number: 9848196
    Abstract: A method for coding includes; segmenting an image into blocks; grouping blocks into a number of subsets; coding, using an entropy coding module, each subset, by associating digital information with symbols of each block of a subset, including, for the first block of the image, initializing state variables of the coding module; and generating a data sub-stream representative of at least one of the coded subsets of blocks. Where a current block is the first block to be coded of a subset, symbol occurrence probabilities for the first current block are determined based on those for a coded and decoded predetermined block of at least one other subset. Where the current block is the last coded block of the subset: writing, in the sub-stream representative of the subset, the entire the digital information associated with the symbols during coding of the blocks of the subset, and implementing the initializing sub-step.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: December 19, 2017
    Assignee: Dolby International AB
    Inventors: Felix Henry, Stephane Pateux, Gordon Clare
  • Patent number: 9848191
    Abstract: An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: December 19, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Shawmin Lei, Hiroyuki Katata
  • Patent number: 9841941
    Abstract: Embodiments are directed to a method and system for receiving, in a bitstream, metadata associated with the audio data, and analyzing the metadata to determine whether a loudness parameter for a first group of audio playback devices are available in the bitstream. Responsive to determining that the parameters are present for the first group, the system uses the parameters and audio data to render audio. Responsive to determining that the loudness parameters are not present for the first group, the system analyzes one or more characteristics of the first group, and determines the parameter based on the one or more characteristics.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: December 12, 2017
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Jeffrey Riedmiller, Scott Gregory Norcross, Karl Jonas Roeden
  • Patent number: 9843785
    Abstract: 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., “black” portions) are used to reconstruct one of the stereoscopic images and the other portion of the checkerboard (e.g., “white” 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.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: December 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Walter J. Husak, David Ruhoff, Alexandros Tourapis, Athanasios Leontaris
  • Patent number: 9843642
    Abstract: Geo origination data is generated for a geo-tagged media device of a user from measurements performed by sensors. The geo origination data is sent to a server system. At the server system, geo-tagged media content elements are selected based on the geo origination data. Further, based on the selected geo-tagged media content elements and the geo origination data, geo-referenced rendering data to be used for rendering media content from the selected geo-tagged media content elements perceivable to the user of the geo-tagged media device is generated. The geo-referenced rendering data can be streamed to the geo-tagged media device along with media content derived from the geo-tagged media content elements for rendering at the geo-tagged media device.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: December 12, 2017
    Assignee: Dolby International AB
    Inventor: Antonio Mateos Sole
  • Patent number: 9843807
    Abstract: Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (OBDC) involves determining if OBDC is enabled in a video bit stream, and determining if OBDC is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. The neighboring macroblocks may be transform coded. If OBDC is enabled in the video bit stream and for the one or more neighboring macroblocks, predictions may be made for a region of the first macroblock that has an edge adjacent with the neighboring macroblocks. OBDC can be causally applied. Disparity compensation parameters or modes may be shared amongst views or layers. A variety of predictions may be used with causally-applied OBDC.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: December 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexandros Tourapis, Athanasios Leontaris
  • Patent number: 9842385
    Abstract: An image processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. After optional color transformation (110) and perceptual quantization (115) of the input image, a multiscale mapping process (120) combines linear (125) and non-linear (130) mapping functions to its input to generate first (127) and second (132) output images, wherein the first and second output images may have a different dynamic range than the first image. A frequency transform (135, 140), such as the FFT, is applied to the first and second output images to generate first (137) and second (142) transformed images. An interpolation function (145) is applied to the first and second transformed images to generate an interpolated transformed image (147). An inverse transform function (150) is applied to the interpolated transformed image to generate an output tone-mapped image (152).
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: December 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Robin Atkins
  • Patent number: 9842600
    Abstract: The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: December 12, 2017
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Patent number: 9842605
    Abstract: Apparatus and methods for audio classifying and processing are disclosed. In one embodiment, an audio processing apparatus includes an audio classifier for classifying an audio signal into at least one audio type in real time; an audio improving device for improving experience of audience; and an adjusting unit for adjusting at least one parameter of the audio improving device in a continuous manner based on the confidence value of the at least one audio type.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: December 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Lie Lu, Alan J. Seefeldt, Jun Wang
  • Patent number: 9842596
    Abstract: Techniques for adaptive processing of media data based on separate data specifying a state of the media data are provided. A device in a media processing chain may determine whether a type of media processing has already been performed on an input version of media data. If so, the device may adapt its processing of the media data to disable performing the type of media processing. If not, the device performs the type of media processing. The device may create a state of the media data specifying the type of media processing. The device may communicate the state of the media data and an output version of the media data to a recipient device in the media processing chain, for the purpose of supporting the recipient device's adaptive processing of the media data.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: December 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jeffrey Riedmiller, Regunathan Radhakrishnan, Marvin Pribadi, Farhad Farahani, Michael Smithers
  • Patent number: 9842594
    Abstract: The present document relates to audio encoding and decoding. In particular, the present document relates to audio coding schemes which make use of high frequency reconstruction (HFR) methods. A system configured to determine a master scale factor band table of a highband signal (105) of an audio signal is described. The highband signal (105) is to be generated from a lowband signal (101) of the audio signal using a high frequency reconstruction (HFR) scheme. The master scale factor band table is indicative of a frequency resolution of a spectral envelope of the highband signal (105).
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: December 12, 2017
    Assignee: Dolby International AB
    Inventors: Per Ekstrand, Kristofer Kjoerling
  • Patent number: 9837087
    Abstract: A method for encoding multi-channel HOA audio signals for noise reduction comprises steps of decorrelating the channels using an inverse adaptive DSHT, the inverse adaptive DSHT comprising a rotation operation and an inverse DSHT, with the rotation operation rotating the spatial sampling grid of the iDSHT, perceptually encoding each of the decorrelated channels, encoding rotation information, the rotation information comprising parameters defining said rotation operation, and transmitting or storing the perceptually encoded audio channels and the encoded rotation information.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: December 5, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Sven Kordon, Alexander Krueger, Peter Jax
  • Patent number: 9838705
    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: December 5, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Purvin Bibhas Pandit, Peng Yin, Dong Tian
  • Patent number: 9838694
    Abstract: There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: December 5, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jae Hoon Kim, Yeping Su, Cristina Gomila
  • Patent number: 9838826
    Abstract: 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 reproduction environment.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: December 5, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Nicolas R. Tsingos, Charles Q. Robinson, Jurgen W. Scharpf
  • Patent number: 9838822
    Abstract: Recordings from microphones that provide 1st order Ambisonics signals, so-called B-format signals, offer a limited cognition of sound directivity. Sound sources are perceived broader than they actually are, especially for off-center listening positions, and the sound sources are often located to be coming from the closest speaker positions. In a method and apparatus for enhancing the directivity of 1st order Ambisonics signals, additional directivity information is extracted (SFA) from the lower order Ambisonics input signal. The additional directivity information is used to estimate higher order Ambisonics coefficients, which are then combined with the coefficients of the input signal. Thus, the directivity of the Ambisonics signal is enhanced, which leads to an increased accuracy of spatial source localization when the Ambisonics signal is decoded to loud speaker signals. The resulting output signal has more energy than the input signal.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: December 5, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Johannes Boehm
  • Patent number: 9830896
    Abstract: Audio processing method and audio processing apparatus, and training method are described. According to embodiments of the application, an accent identifier is used to identify accent frames from a plurality of audio frames, resulting in an accent sequence comprised of probability scores of accent and/or non-accent decisions with respect to the plurality of audio frames. Then a tempo estimator is used to estimate a tempo sequence of the plurality of audio frames based on the accent sequence. The embodiments can be well adaptive to the change of tempo, and can be further used to tracking beats properly.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jun Wang, Lie Lu
  • Patent number: 9830928
    Abstract: The present invention relates to coding of audio signals, and in particular to high frequency reconstruction methods including a frequency domain harmonic transposer. A system and method for generating a high frequency component of a signal from a low frequency component of the signal is described.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: November 28, 2017
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Per Ekstrand
  • Patent number: 9830918
    Abstract: The present document relates to multichannel audio coding and more precisely to techniques for discrete multichannel audio encoding and decoding. In particular, the present document relates to systems and method for coding soundfields. An audio encoder (200) configured to encode a frame of a soundfield signal (110) comprising a plurality of audio signals is described. The audio encoder (200) comprises a transform determination unit (203, 204) configured to determine an energy-compacting orthogonal transform (V) based on the frame of the soundfield signal (110). Furthermore, the encoder (200) comprises a transform unit (202) configured to apply the energy-compacting orthogonal transform (V) to the frame of the soundfield signal (110), and configured to provide a frame of a rotated soundfield signal (112) comprising a plurality of rotated audio signals (E1, E2, E3).
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 28, 2017
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Toni Hirvonen, Leif Jonas Samuelsson, Lars Villemoes, Janusz Klejsa, Harald Mundt
  • Patent number: 9832584
    Abstract: The invention relates to Higher-Order Ambisonics (HOA) Content Loudness Level Adjustment. A method for adjusting a loudness level of a HOA audio signal on a transmitting side comprises steps of measuring loudness of only the W-channel of the HOA audio signal, and leveling HOA master gain for all channels of the HOA signal according to the measured loudness of the W-channel.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Florian Keiler
  • Patent number: 9830917
    Abstract: Some audio processing methods may involve receiving audio data corresponding to a plurality of audio channels and determining audio characteristics of the audio data, which may include transient information. An amount of decorrelation for the audio data may be based, at least in part, on the audio characteristics. If a definite transient event is determined, a decorrelation process may be temporarily halted or slowed. Determining transient information may involve evaluating the likelihood and/or the severity of a transient event. In some implementations, determining transient information may involve evaluating a temporal power variation in the audio data. Explicit transient information may or may not be received with the audio data, depending on the implementation. Explicit transient information may include a transient control value corresponding to a definite transient event, a definite non-transient event or an intermediate transient control value.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Kuan-Chieh Yen, Vinay Melkote, Grant A. Davidson
  • Patent number: 9830922
    Abstract: Embodiments of the present invention relate to audio object clustering by utilizing temporal variation of audio objects. There is provided a method of estimating temporal variation of an audio object for use in audio object clustering. The method comprises obtaining at least one segment of an audio track associated with the audio object, the at least one segment containing the audio object; estimating variation of the audio object over a time duration of the at least one segment based on at least one property of the audio object and adjusting, at least partially based on the estimated variation of the audio object, a contribution of the audio object to the determination of a centroid in the audio object clustering. Corresponding system and computer program product are disclosed.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Lianwu Chen, Lie Lu, Dirk Jeroen Breebaart
  • Patent number: 9830916
    Abstract: Audio processing methods may involve receiving audio data corresponding to a plurality of audio channels. The audio data may include a frequency domain representation corresponding to filterbank coefficients of an audio encoding or processing system. A decorrelation process may be performed with the same filterbank coefficients used by the audio encoding or processing system. The decorrelation process may be performed without converting coefficients of the frequency domain representation to another frequency domain or time domain representation. The decorrelation process may involve selective or signal-adaptive decorrelation of specific channels and/or specific frequency bands. The decorrelation process may involve applying a decorrelation filter to a portion of the received audio data to produce filtered audio data. The decorrelation process may involve using a non-hierarchal mixer to combine a direct portion of the received audio data with the filtered audio data according to spatial parameters.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Vinay Melkote, Kuan-Chieh Yen, Grant A. Davidson, Matthew Fellers, Mark S. Vinton, Vivek Kumar
  • Patent number: 9832438
    Abstract: Dual and multi-modulator projector display systems and techniques are disclosed. In one embodiment, a projector display system comprises a light source; a controller, a first modulator, receiving light from the light source and rendering a halftone image of said the input image; a blurring optical system that blurs said halftone image with a Point Spread Function (PSF); and a second modulator receiving the blurred halftone image and rendering a pulse width modulated image which may be projected to form the desired screen image. Systems and techniques for forming a binary halftone image from input image, correcting for misalignment between the first and second modulators and calibrating the projector system—e.g. over time—for continuous image improvement are also disclosed.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Jerome Shields
  • Patent number: 9832590
    Abstract: Embodiments are described for a method of rendering an audio program by receiving, in a renderer of a playback system, the audio program and a target response representing desired characteristics of the playback environment, deriving a playback environment response based on characteristics of the playback environment, comparing the target response to the playback environment response to generate a set of correction settings, and applying the correction settings to the audio program so that the audio program is rendered according to the characteristics of the target response. The target response may be based on audio characteristics in a creation environment.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: November 28, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Charles Q. Robinson
  • Patent number: RE46664
    Abstract: Laser lit flat panel displays are disclosed including edge-lit and direct lit backlights. In certain embodiments, laser assemblies are selected to obtain bandwidth distributions to reduce speckle.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Masayuki Karakawa