公开(公告)号：US20190392845A1

公开(公告)日：2019-12-26

申请号：US16450514

申请日：2019-06-24

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Ferdinando Olivieri ,  Moo Young Kim ,  Dipanjan Sen ,  Shankar Thagadur Shivappa

IPC: G10L19/008 ,  H04S7/00 ,  H04R5/02 ,  H04R5/04

Abstract: In general, techniques are described by which to specify spatially formatted enhanced audio data for backward compatible audio bitstreams. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may store the backward compatible bitstream that conforms to a legacy transport format. The processor(s) may obtain, from the backward compatible bitstream, legacy audio data that conforms to a legacy audio format and a spatially formatted extended audio stream. The processor(s) may process the spatially formatted extended audio stream to obtain extended audio data that enhances the legacy audio data. The processor(s) may next obtain, based on the legacy audio data and the extended audio data, enhanced audio data that conforms to an enhanced audio format. The processor(s) may output the enhanced audio data to one or more speakers.

公开(公告)号：US10405126B2

公开(公告)日：2019-09-03

申请号：US15672058

申请日：2017-08-08

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen ,  Thomas Stockhammer

IPC: H04S7/00 ,  G06F3/01 ,  G06F3/16 ,  H04R1/02 ,  H04R1/40 ,  H04S3/00 ,  G06T19/00

Abstract: An example device includes a memory device, and a processor coupled to the memory device. The memory is configured to store a plurality of representations of a soundfield. The processor is configured to track a steering angle provided by one or more angles associated with the device, and to select, based on the steering angle, a representation of the soundfield from the plurality of representations stored to the memory device.

公开(公告)号：US10346126B2

公开(公告)日：2019-07-09

申请号：US15269567

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Moo Young Kim ,  Dipanjan Sen

IPC: G06F17/21 ,  G06F3/16 ,  H04L12/26 ,  H04L29/06 ,  H04L29/08 ,  H04H20/42 ,  H04H20/82 ,  G10L19/24 ,  G10L19/008 ,  H04N21/262 ,  G10L19/16

Abstract: Methods and apparatuses are disclosed for streaming audio between a source device and a destination device. An example method may include determining an available bandwidth between the source device and the destination device. The example method may also include determining a bit rate for streaming audio from the source device to the destination device, wherein the bit rate is based on the available bandwidth. The example method may further include determining a preferred audio characteristic for streaming audio from the source device to the destination device, wherein the preferred audio characteristic is based on a user preference. The example method may also include determining encoded audio to be transmitted from the source device to the destination device based on the preferred audio characteristic and the bit rate.

公开(公告)号：US10140996B2

公开(公告)日：2018-11-27

申请号：US14878691

申请日：2015-10-08

Applicant: QUALCOMM Incorporated

Inventor： Moo Young Kim ,  Nils Günther Peters ,  Dipanjan Sen

IPC: H04R5/00 ,  G10L19/008 ,  G10L19/16 ,  H04S3/00

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.

公开(公告)号：US10075802B1

公开(公告)日：2018-09-11

申请号：US15671988

申请日：2017-08-08

Applicant: QUALCOMM Incorporated

Inventor： Moo Young Kim ,  Nils Günther Peters ,  Jeongook Song ,  Dipanjan Sen

IPC: H04S7/00 ,  G10L25/21 ,  G10L19/002 ,  G10L19/008 ,  H04S3/00

CPC classification number: H04S7/302 ,  G10L19/002 ,  G10L19/008 ,  G10L25/21 ,  H04S3/008 ,  H04S2400/13 ,  H04S2400/15 ,  H04S2420/11

Abstract: In general, techniques are described by which to perform bitrate allocation with respect to higher order ambisonic (HOA) audio data. A device comprising a memory and a processor may be configured to perform various aspects of the bitrate allocation techniques. The memory may be configured to store a spatially compressed version of the HOA audio data. The processor may be coupled to the memory, and configured to perform bitrate allocation, based on an analysis of transport channels representative of the spatially compressed version of the HOA audio data, and prior to performing gain control with respect to the transport channels or after performing inverse gain control with respect to the transport channels, to allocate a number of bits to each of the transport channels. The processor may also be configured to generate a bitstream that specifies each of the transport channels using the respective allocated number of bits.

公开(公告)号：US09961475B2

公开(公告)日：2018-05-01

申请号：US15266910

申请日：2016-09-15

Applicant: QUALCOMM Incorporated

Inventor： Moo Young Kim ,  Dipanjan Sen

IPC: H04R5/02 ,  H04S7/00 ,  G10L19/20 ,  H04S3/02

CPC classification number: H04S7/308 ,  G10L19/008 ,  G10L19/167 ,  G10L19/173 ,  G10L19/20 ,  H04S3/02 ,  H04S2400/01 ,  H04S2420/11

Abstract: A device obtains an object-based representation of an audio signal of an audio object. The audio signal corresponds to a time interval. Additionally, the device obtains a representation of a spatial vector for the audio object, wherein the spatial vector is defined in a Higher-Order Ambisonics (HOA) domain and is based on a first plurality of loudspeaker locations. The device generates, based on the audio signal of the audio object and the spatial vector, a plurality of audio signals. Each respective audio signal of the plurality of audio signals corresponds to a respective loudspeaker in a plurality of local loudspeakers at the second plurality of loudspeaker locations different from the first plurality of loudspeaker locations.

公开(公告)号：US09959880B2

公开(公告)日：2018-05-01

申请号：US15290229

申请日：2016-10-11

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen ,  Moo Young Kim

IPC: H04R5/02 ,  G10L19/20 ,  G10L19/16 ,  H04S5/00 ,  G10L19/008 ,  H04S3/02

CPC classification number: H04S5/00 ,  G10L19/008 ,  H04R2499/15 ,  H04S3/02 ,  H04S2400/01 ,  H04S2420/11

Abstract: In general, techniques are described for coding higher-order ambisonic coefficients during multiple transitions. A device comprising a processor and a memory coupled to the processor may be configured to perform the techniques. The processor may be configured to obtain a multi-transition indication of whether an ambient HOA coefficient is in transition during a same frame of the bitstream as a foreground audio signal is in transition. The processor may also be configured to obtain a vector that describes a spatial characteristic of a corresponding foreground audio signal based on the multi-transition indication, both the vector and the corresponding HOA audio signal decomposed from the HOA audio data. The memory may be configured to store the vector.

公开(公告)号：US09959875B2

公开(公告)日：2018-05-01

申请号：US14192819

申请日：2014-02-27

Applicant: QUALCOMM Incorporated

Inventor： Dipanjan Sen ,  Martin James Morrell

IPC: G10L19/00 ,  G10L19/008 ,  G10L19/16 ,  G10L19/20 ,  G10L19/018

CPC classification number: G10L19/008 ,  G10L19/018 ,  G10L19/167 ,  G10L19/20 ,  H04S2420/11

Abstract: In general, techniques are described for specifying spherical harmonic coefficients in a bitstream. A device comprising one or more processors may perform the techniques. The processors may be configured to identify, from the bitstream, a plurality of hierarchical elements describing a sound field that are included in the bitstream. The processors may further be configured to parse the bitstream to determine the identified plurality of hierarchical elements.

公开(公告)号：US20180081619A1

公开(公告)日：2018-03-22

申请号：US15269567

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Moo Young Kim ,  Dipanjan Sen

IPC: G06F3/16 ,  H04L29/06 ,  G10L19/008 ,  H04L12/26

CPC classification number: G06F3/165 ,  G10L19/008 ,  G10L19/167 ,  G10L19/24 ,  H04H20/42 ,  H04H20/82 ,  H04L43/0882 ,  H04L43/0888 ,  H04L65/602 ,  H04L65/607 ,  H04L65/80 ,  H04L67/306 ,  H04N21/26216

Abstract: Methods and apparatuses are disclosed for streaming audio between a source device and a destination device. An example method may include determining an available bandwidth between the source device and the destination device. The example method may also include determining a bit rate for streaming audio from the source device to the destination device, wherein the bit rate is based on the available bandwidth. The example method may further include determining a preferred audio characteristic for streaming audio from the source device to the destination device, wherein the preferred audio characteristic is based on a user preference. The example method may also include determining encoded audio to be transmitted from the source device to the destination device based on the preferred audio characteristic and the bit rate.

公开(公告)号：US09922656B2

公开(公告)日：2018-03-20

申请号：US14594533

申请日：2015-01-12

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/002 ,  G10L19/008

CPC classification number: G10L19/002 ,  G10L19/008 ,  H04S2420/11

Abstract: In general, techniques are described for transitioning an ambient higher order ambisonic coefficient. A device comprising a memory and a processor may be configured to perform the techniques. The processor may obtain, from a frame of a bitstream of encoded audio data, a bit indicative of a reduced vector. The reduced vector may represent, at least in part, a spatial component of a sound field. The processor may also obtain, from the frame, a bit indicative of a transition of an ambient higher-order ambisonic coefficient. The ambient higher-order ambisonic coefficient may represent, at least in part, an ambient component of the sound field. The reduced vector may include a vector element associated with the ambient higher-order ambisonic coefficient in transition. The memory may be configured to store the frame of the bitstream.