公开(公告)号：US09685163B2

公开(公告)日：2017-06-20

申请号：US14192829

申请日：2014-02-27

Applicant: QUALCOMM Incorporated

Inventor： Dipanjan Sen ,  Martin James Morrell ,  Nils Günther Peters

IPC: G06F17/00 ,  G10L19/008 ,  G10L19/16

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

Abstract: In general, techniques are described for transforming spherical harmonic coefficients. A device comprising one or more processors may perform the techniques. The processors may be configured to parse the bitstream to determine transformation information describing how the sound field was transformed to reduce a number of the plurality of hierarchical elements that provide information relevant in describing the sound field. The processors may further be configured to, when reproducing the sound field based on those of the plurality of hierarchical elements that provide information relevant in describing the sound field, transform the sound field based on the transformation information to reverse the transformation performed to reduce the number of the plurality of hierarchical elements.

公开(公告)号：US09674632B2

公开(公告)日：2017-06-06

申请号：US14288293

申请日：2014-05-27

Applicant: QUALCOMM Incorporated

Inventor： Pei Xiang ,  Dipanjan Sen ,  Nils Günther Peters ,  Martin James Morrell

IPC: H04S7/00 ,  H04S5/00 ,  G10K15/12 ,  G10L19/008 ,  H04S1/00 ,  H04S3/00

CPC classification number: H04S7/305 ,  G10K15/12 ,  G10L19/008 ,  H04S1/002 ,  H04S1/005 ,  H04S3/004 ,  H04S5/00 ,  H04S7/306 ,  H04S7/307 ,  H04S2400/01 ,  H04S2420/01 ,  H04S2420/07 ,  H04S2420/11

Abstract: A device comprising one or more processors is configured to determine a plurality of segments for each of a plurality of binaural room impulse response filters, wherein each of the plurality of binaural room impulse response filters comprises a residual room response segment and at least one direction-dependent segment for which a filter response depends on a location within a sound field; transform each of at least one direction-dependent segment of the plurality of binaural room impulse response filters to a domain corresponding to a domain of a plurality of hierarchical elements to generate a plurality of transformed binaural room impulse response filters, wherein the plurality of hierarchical elements describe a sound field; and perform a fast convolution of the plurality of transformed binaural room impulse response filters and the plurality of hierarchical elements to render the sound field.

公开(公告)号：US09653086B2

公开(公告)日：2017-05-16

申请号：US15290213

申请日：2016-10-11

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen

IPC: G10L19/00 ,  G10L19/038 ,  G10L19/008 ,  G10L19/002 ,  H04S7/00 ,  G10L19/20

CPC classification number: G10L19/038 ,  G10L19/002 ,  G10L19/008 ,  G10L19/08 ,  G10L19/20 ,  G10L2019/0001 ,  H04R5/00 ,  H04R2499/15 ,  H04S3/002 ,  H04S7/30 ,  H04S2400/01 ,  H04S2420/11

Abstract: In general, techniques are described for coding a number of code vectors for independent frame of higher order ambisonic coefficients. An audio decoding device comprising a memory and a processor may perform the techniques. The memory may store a first frame of a bitstream and a second frame of the bitstream. The processor may extract, from the first frame, one or more bits indicative of whether the first frame is an independent frame that includes information specifying a number of code vectors to be used when performing vector dequantization with respect to the vector. The processor may also extract, from the first frame without referencing the second frame, the information specifying the number of code vectors.

公开(公告)号：US20170110140A1

公开(公告)日：2017-04-20

申请号：US15290229

申请日：2016-10-11

Applicant: QUALCOMM Incorporated

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

IPC: G10L19/20 ,  H04S5/00 ,  G10L19/16

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：US20170032799A1

公开(公告)日：2017-02-02

申请号：US15290214

申请日：2016-10-11

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen

IPC: G10L19/038 ,  G10L19/002 ,  H04S7/00 ,  G10L19/008 ,  H04S3/00

CPC classification number: G10L19/038 ,  G10L19/002 ,  G10L19/008 ,  G10L19/08 ,  G10L19/20 ,  G10L2019/0001 ,  H04R5/00 ,  H04R2499/15 ,  H04S3/002 ,  H04S7/30 ,  H04S2400/01 ,  H04S2420/11

Abstract: In general, techniques are described for indicating reuse of a syntax element that indicates a quantization mode used when compressing a vector. A device comprising a processor and a memory may perform the techniques. The processor may be configured to obtain a bitstream comprising a vector in a spherical harmonics domain. The bitstream may further comprise an indicator for whether to reuse, from a previous frame, at least one syntax element indicative of a quantization mode used when compressing the vector. The memory may be configured to store the bitstream.

Abstract translation: 通常，描述用于指示表示在压缩向量时使用的量化模式的语法元素的重用的技术。 包括处理器和存储器的设备可以执行这些技术。 处理器可以被配置为获得包含球面谐波域中的向量的比特流。 比特流还可以包括指示符，用于是否从先前帧重用指示在压缩向量时使用的量化模式的至少一个语法元素。 存储器可以被配置为存储比特流。

公开(公告)号：US09420393B2

公开(公告)日：2016-08-16

申请号：US14288276

申请日：2014-05-27

Applicant: QUALCOMM Incorporated

Inventor： Martin James Morrell ,  Nils Günther Peters ,  Dipanjan Sen

IPC: H04S7/00 ,  G10L19/008 ,  H04S5/00 ,  G10K15/12 ,  H04S1/00 ,  H04S3/00

CPC classification number: H04S7/305 ,  G10K15/12 ,  G10L19/008 ,  H04S1/002 ,  H04S1/005 ,  H04S3/004 ,  H04S5/00 ,  H04S7/306 ,  H04S7/307 ,  H04S2400/01 ,  H04S2420/01 ,  H04S2420/07 ,  H04S2420/11

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.

Abstract translation: 一种装置包括一个或多个处理器，其被配置为对三声道的声场施加双耳室脉冲响应滤波器，以便呈现声场。

公开(公告)号：US09384741B2

公开(公告)日：2016-07-05

申请号：US14289602

申请日：2014-05-28

Applicant: QUALCOMM Incorporated

Inventor： Martin James Morrell ,  Dipanjan Sen ,  Nils Günther Peters

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

CPC classification number: G10L19/008 ,  H04S7/30 ,  H04S7/304 ,  H04S2400/01 ,  H04S2420/01 ,  H04S2420/11

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.

Abstract translation: 包括一个或多个处理器的设备被配置为获得变换信息，所述变换信息描述如何变换声场以将多个分层元素的数量减少到减少的多个分层元素; 并且基于变换信息对所减少的多个分层元素执行双耳音频呈现。

公开(公告)号：US20150271621A1

公开(公告)日：2015-09-24

申请号：US14663225

申请日：2015-03-19

Applicant: QUALCOMM Incorporated

Inventor： Dipanjan Sen ,  Nils Günther Peters

IPC: H04S7/00

CPC classification number: H04S7/30 ,  G10L19/008 ,  G10L19/018 ,  G10L25/48

Abstract: In general, techniques are described for inserting audio channels into descriptions of soundfields. A device comprising a processor may be configured to perform the techniques. The processor may be configured to obtain an audio channel separate from a higher-order ambisonic representation of a soundfield. The processor may further be configured to insert the audio channel at a spatial location within the soundfield such that the audio channel is able to be extracted from the soundfield.

Abstract translation: 通常，描述了将音频通道插入到声场的描述中的技术。 包括处理器的设备可以被配置为执行技术。 处理器可以被配置为获得与声场的较高阶的Ambisonic表示分离的音频通道。 处理器还可以被配置为将音频通道插入声场内的空间位置，使得能够从声场提取音频通道。

公开(公告)号：US20150243292A1

公开(公告)日：2015-08-27

申请号：US14630165

申请日：2015-02-24

Applicant: QUALCOMM Incorporated

Inventor： Martin James Morrell ,  Nils Günther Peters ,  Dipanjan Sen

IPC: G10L19/008 ,  G10L19/02

CPC classification number: G10L19/008 ,  G10L19/0204 ,  G10L19/167

Abstract: In general, techniques are described for signaling an order format for higher-order ambisonic audio data. An audio decoding device including a memory and a processor may perform the techniques. The memory may be configured to store a bitstream indicative of a coded higher-order ambisonic (HOA) audio signal. The processor may be configured to obtain, from the bitstream, a harmonic coefficient ordering format indicator indicative of a symmetric harmonic coefficient ordering format for a source set of HOA coefficients from which the coded HOA audio signal is generated. The processor may further be configured to decode the coded HOA audio signal based on the symmetric harmonic coefficient ordering format indicator.

Abstract translation: 一般来说，描述了用于发信号通知用于较高阶的Ambisonic音频数据的订单格式的技术。 包括存储器和处理器的音频解码装置可以执行这些技术。 存储器可以被配置为存储指示经编码的高阶ambisonic（HOA）音频信号的比特流。 处理器可以被配置为从比特流获得指示用于生成编码的HOA音频信号的HOA系数的源组的对称谐波系数排序格式的谐波系数排序格式指示符。 处理器还可以被配置为基于对称谐波系数排序格式指示符对编码的HOA音频信号进行解码。

公开(公告)号：US20150213809A1

公开(公告)日：2015-07-30

申请号：US14609208

申请日：2015-01-29

Applicant: QUALCOMM Incorporated

Inventor： Nils Günther Peters ,  Dipanjan Sen

IPC: G10L19/038 ,  G10L19/008 ,  G10L19/002

CPC classification number: G10L19/038 ,  G10L19/002 ,  G10L19/008 ,  G10L19/08 ,  G10L19/20 ,  G10L2019/0001 ,  H04R5/00 ,  H04R2499/15 ,  H04S3/002 ,  H04S7/30 ,  H04S2400/01 ,  H04S2420/11

Abstract: In general, techniques are described for coding an ambient higher order ambisonic coefficient. An audio decoding device comprising a memory and a processor may perform the techniques. The memory may store a first frame of a bitstream and a second frame of the bitstream. The processor may obtain, from the first frame, one or more bits indicative of whether the first frame is an independent frame that includes additional reference information to enable the first frame to be decoded without reference to the second frame. The processor may further obtain, in response to the one or more bits indicating that the first frame is not an independent frame, prediction information for first channel side information data of a transport channel. The prediction information may be used to decode the first channel side information data of the transport channel with reference to second channel side information data of the transport channel.

Abstract translation: 一般来说，描述了用于编码环境较高阶的Ambisonic系数的技术。 包括存储器和处理器的音频解码装置可以执行这些技术。 存储器可以存储比特流的第一帧和比特流的第二帧。 处理器可以从第一帧获得指示第一帧是否是包括附加参考信息的独立帧的一个或多个位，以使第一帧能够被解码而不参考第二帧。 响应于指示第一帧不是独立帧的一个或多个比特，处理器还可以获得用于传输信道的第一信道侧信息数据的预测信息。 参考传输信道的第二信道侧信息数据，预测信息可以用于解码传输信道的第一信道侧信息数据。