Patents by Inventor Dipanjan Sen

Dipanjan Sen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Binaural rendering of spherical harmonic coefficients
    Patent number: 9420393
    Abstract: A device comprises one or more processors configured to apply a binaural room impulse response filter to spherical harmonic coefficients representative of a sound field in three dimensions so as to render the sound field.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: August 16, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Martin James Morrell, Nils Günther Peters, Dipanjan Sen
  • Performing spatial masking with respect to spherical harmonic coefficients
    Patent number: 9412385
    Abstract: In general, techniques are described by which to perform spatial masking with respect to spherical harmonic coefficients. As one example, an audio encoding device comprising a processor may perform various aspects of the techniques. The processor may be configured to perform spatial analysis based on the spherical harmonic coefficients describing a three-dimensional sound field to identify a spatial masking threshold. The processor may further be configured to render the multi-channel audio data from the plurality of spherical harmonic coefficients, and compress the multi-channel audio data based on the identified spatial masking threshold to generate a bitstream.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: August 9, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Dipanjan Sen, Martin James Morrell
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR BACKWARD-COMPATIBLE AUDIO CODING
    Publication number: 20160219389
    Abstract: Systems, methods, and apparatus for backward-compatible coding of a set of basis function coefficients that describe a sound field are presented.
    Type: Application
    Filed: February 11, 2016
    Publication date: July 28, 2016
    Inventors: Dipanjan Sen, Pei Xiang
  • Binauralization of rotated higher order ambisonics
    Patent number: 9384741
    Abstract: A device comprising one or more processors is configured to obtain transformation information, the transformation information describing how a sound field was transformed to reduce a number of a plurality of hierarchical elements to a reduced plurality of hierarchical elements; and perform binaural audio rendering with respect to the reduced plurality of hierarchical elements based on the transformation information.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: July 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Martin James Morrell, Dipanjan Sen, Nils Günther Peters
  • Filtering with binaural room impulse responses with content analysis and weighting
    Patent number: 9369818
    Abstract: A device comprising one or more processors is configured to apply adaptively determined weights to a plurality of channels of the audio signal to generate a plurality of adaptively weighted channels of the audio signal. The processors are further configured to combine at least two of the plurality of adaptively weighted channels of the audio signal to generate a combined signal. The processors are further configured to apply a binaural room impulse response filter to the combined signal to generate a binaural audio signal.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: June 14, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Pei Xiang, Dipanjan Sen
  • SCREEN RELATED ADAPTATION OF HOA CONTENT
    Publication number: 20160104495
    Abstract: This disclosure describes techniques for coding of higher-order ambisonics audio data comprising at least one higher-order ambisonic (HOA) coefficient corresponding to a spherical harmonic basis function having an order greater than one. This disclosure describes techniques for adjusting HOA soundfields to potentially improve spatial alignment of the acoustic elements to the visual component in a mixed audio/video reproduction scenario. In one example, a device for rendering an HOA audio signal includes one or more processors configured to render the HOA audio signal over one or more speakers based on one or more field of view (FOV) parameters of a reference screen and one or more FOV parameters of a viewing window.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Inventors: Nils Günther Peters, Martin James Morrell, Dipanjan Sen
  • SIGNALING CHANNELS FOR SCALABLE CODING OF HIGHER ORDER AMBISONIC AUDIO DATA
    Publication number: 20160104494
    Abstract: In general, techniques are described for signaling channels for scalable coding of higher order ambisonic audio data. A device comprising a memory and a processor may be configured to perform the techniques. The memory may be configured to store the bitstream. The processor may be configured to obtain, from the bitstream, an indication of a number of channels specified in one or more layers in the bitstream, and obtain the channels specified in the one or more layers in the bitstream based on the indication of the number of channels.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • SIGNALING LAYERS FOR SCALABLE CODING OF HIGHER ORDER AMBISONIC AUDIO DATA
    Publication number: 20160104493
    Abstract: In general, techniques are described for signaling layers for scalable coding of higher order ambisonic audio data. A device comprising a memory and a processor may be configured to perform the techniques. The memory may be configured to store the bitstream. The processor may be configured to obtain, from the bitstream, an indication of a number of layers specified in the bitstream, and obtain the layers of the bitstream based on the indication of the number of layers.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • Systems, methods, apparatus, and computer-readable media for backward-compatible audio coding
    Patent number: 9288603
    Abstract: Systems, methods, and apparatus for backward-compatible coding of a set of basis function coefficients that describe a sound field are presented.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Dipanjan Sen, Pei Xiang
  • INTERMEDIATE COMPRESSION FOR HIGHER ORDER AMBISONIC AUDIO DATA
    Publication number: 20160064005
    Abstract: In general, techniques are directed to intermediate compression of higher order ambisonic audio data. For example, a device comprising a processor and a memory may be configured to perform the techniques. The memory may be configured to store an intermediately formatted audio data generated as a result of an intermediate compression of higher order ambisonic audio data. The one or more processors may be configured to process the intermediately formatted audio data.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 3, 2016
    Inventors: Nils Günther Peters, Dipanjan Sen
  • EDITING OF HIGHER-ORDER AMBISONIC AUDIO DATA
    Publication number: 20160035356
    Abstract: In general, techniques are described for editing of higher-order ambisonic audio data. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may be configured to store spherical harmonic (SH) basis functions. The one or more processors may be configured to manipulate the SH basis functions associated with higher order ambisonics coefficients to alter a direction of an audio object represented by the higher order ambisonics coefficients.
    Type: Application
    Filed: March 26, 2015
    Publication date: February 4, 2016
    Inventors: Martin James Morrell, Pei Xiang, Richard Paul Walters, Nils Günther Peters, Dipanjan Sen
  • SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR THREE-DIMENSIONAL AUDIO CODING USING BASIS FUNCTION COEFFICIENTS
    Publication number: 20160035358
    Abstract: Systems, methods, and apparatus for a unified approach to encoding different types of audio inputs are described.
    Type: Application
    Filed: October 9, 2015
    Publication date: February 4, 2016
    Inventor: Dipanjan Sen
  • EDITING OF HIGHER-ORDER AMBISONIC AUDIO DATA
    Publication number: 20160035386
    Abstract: In general, techniques are described for audio editing of higher-order ambisonic audio data. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may be configured to store a higher order ambisonic (HOA) representation of the audio object. The one or more processors may be configured to add a source tail to the HOA representation of the audio object by storing one or more spherical harmonic (SH) basis functions associated with the audio object to a buffer.
    Type: Application
    Filed: March 26, 2015
    Publication date: February 4, 2016
    Inventors: Martin James Morrell, Pei Xiang, Richard Paul Walters, Nils Günther Peters, Dipanjan Sen
  • REDUCING CORRELATION BETWEEN HIGHER ORDER AMBISONIC (HOA) BACKGROUND CHANNELS
    Publication number: 20160007132
    Abstract: In general, techniques are described for compression and decoding of audio data are generally disclosed. An example device for compressing audio data includes one or more processors configured to apply a decorrelation transform to ambient ambisonic coefficients to obtain a decorrelated representation of the ambient ambisonic coefficients, the ambient HOA coefficients having been extracted from a plurality of higher order ambisonic coefficients and representative of a background component of a soundfield described by the plurality of higher order ambisonic coefficients, wherein at least one of the plurality of higher order ambisonic coefficients is associated with a spherical basis function having an order greater than one.
    Type: Application
    Filed: July 1, 2015
    Publication date: January 7, 2016
    Inventors: Nils Günther Peters, Dipanjan Sen, Martin James Morrell
  • OBTAINING SYMMETRY INFORMATION FOR HIGHER ORDER AMBISONIC AUDIO RENDERERS
    Publication number: 20150341736
    Abstract: In general, techniques are described for obtaining audio rendering information in a bitstream. A device configured to render higher order ambisonic coefficients comprising a processor and a memory may perform the techniques. The processor may be configured to obtain sign symmetry information indicative of sign symmetry of a matrix used to render the higher order ambisonic coefficients to generate a plurality of speaker feeds. The memory may be configured to store the sparseness information.
    Type: Application
    Filed: May 28, 2015
    Publication date: November 26, 2015
    Inventors: Nils Günther Peters, Dipanjan Sen, Martin James Morrell
  • SELECTING CODEBOOKS FOR CODING VECTORS DECOMPOSED FROM HIGHER-ORDER AMBISONIC AUDIO SIGNALS
    Publication number: 20150332692
    Abstract: In general, techniques are described for performing codebook selection when coding vectors decomposed from higher-order ambisonic coefficients. A device comprising a memory and a processor may perform the techniques. The memory may be configured to store a plurality of codebooks to use when performing vector dequantization with respect to a vector quantized spatial component of a soundfield. The vector quantized spatial component may be obtained through application of a decomposition to a plurality of higher order ambisonic coefficients. The processor may be configured to select one of the plurality of codebooks.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • CLOSED LOOP QUANTIZATION OF HIGHER ORDER AMBISONIC COEFFICIENTS
    Publication number: 20150332681
    Abstract: In general, techniques are described for closed loop quantization of HOA coefficients that provide a three-dimensional representation of the sound field. An audio encoding device may perform closed loop quantization of an audio object based at least in part on a result of performing quantization of directional information associated with the audio object. An audio decoding device may obtain an audio object that has been closed loop quantized based at least in part on a result of performing quantization of directional information associated with the audio object, and may dequantize the audio object.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • DETERMINING BETWEEN SCALAR AND VECTOR QUANTIZATION IN HIGHER ORDER AMBISONIC COEFFICIENTS
    Publication number: 20150332691
    Abstract: In general, techniques are described for coding of vectors decomposed from higher-order ambisonic coefficients. A device comprising a memory and a processor may perform the techniques. The memory may be configured to store audio data. The processor may be configured to determine whether to perform vector dequantization or scalar dequantization with respect to a decomposed version of the plurality of HOA coefficients.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • CODING VECTORS DECOMPOSED FROM HIGHER-ORDER AMBISONICS AUDIO SIGNALS
    Publication number: 20150332690
    Abstract: In general, techniques are described for coding of vectors decomposed from higher order ambisonic coefficients. A device comprising a processor and a memory may perform the techniques. The processor may be configured to obtain from a bitstream data indicative of a plurality of weight values that represent a vector that is included in a decomposed version of the plurality of HOA coefficients. Each of the weight values may correspond to a respective one of a plurality of weights in a weighted sum of code vectors that represents the vector and that includes a set of code vectors. The processor may further be configured to reconstruct the vector based on the weight values and the code vectors. The memory may be configured to store the reconstructed vector.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Moo Young Kim, Nils Günther Peters, Dipanjan Sen
  • Systems, methods, apparatus, and computer-readable media for three-dimensional audio coding using basis function coefficients
    Patent number: 9190065
    Abstract: Systems, methods, and apparatus for a unified approach to encoding different types of audio inputs are described.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 17, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Dipanjan Sen