公开(公告)号：US10083708B2

公开(公告)日：2018-09-25

申请号：US14509676

申请日：2014-10-08

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan

IPC: G10L21/00 ,  G10L21/0216 ,  G10L19/02 ,  G10L19/087 ,  G10L21/038 ,  G10L25/78

CPC classification number: G10L21/0216 ,  G10L19/0208 ,  G10L19/087 ,  G10L21/0208 ,  G10L21/038 ,  G10L25/78

Abstract: A method includes generating a high-band residual signal based on a high-band portion of an audio signal. The method also includes generating a harmonically extended signal at least partially based on a low-band portion of the audio signal. The method further includes determining a mixing factor based on the high-band residual signal, the harmonically extended signal, and modulated noise. The modulated noise is at least partially based on the harmonically extended signal and white noise.

公开(公告)号：US09712287B2

公开(公告)日：2017-07-18

申请号：US14809085

申请日：2015-07-24

Applicant: QUALCOMM Incorporated

Inventor： Venkatesh Krishnan ,  Vivek Rajendran ,  Sandip Sarkar ,  Subasingha Shaminda Subasingha ,  Venkatraman S. Atti

IPC: H04L1/18 ,  H04L1/00 ,  H04L1/08

CPC classification number: H04L1/08 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/008 ,  H04L1/1812 ,  H04L1/1835

Abstract: A receiver is configured to receive packets that correspond to at least a subset of a sequence of packets and that include error correction data. The error correction data of a first packet of the packets includes a partial copy of a second packet. A buffer is configured to store the packets. An analyzer is configured to determine whether a first particular packet of the sequence is missing from the buffer, to determine whether a partial copy of the first particular packet is stored in the buffer as error correction data in a second particular packet, to update a value based at least in part on whether the first particular packet is missing from the buffer and the partial copy of the first particular packet is stored in the buffer, and to adjust an error recovery parameter based at least in part on the value.

公开(公告)号：US09711156B2

公开(公告)日：2017-07-18

申请号：US13959188

申请日：2013-08-05

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Srinivasa Atti ,  Venkatesh Krishnan ,  Vivek Rajendran ,  Stephane Pierre Villette

IPC: G10L21/038 ,  G10L19/03 ,  G10L21/0388 ,  G10L19/24 ,  G10L21/0208 ,  G10L21/0216 ,  G10L19/07

CPC classification number: G10L19/03 ,  G10L19/07 ,  G10L19/24 ,  G10L21/0208 ,  G10L21/0216 ,  G10L21/0388

Abstract: A particular method includes determining, based on spectral information corresponding to an audio signal that includes a low-band portion and a high-band portion, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes filtering the high-band portion of the audio signal and generating an encoded signal. Generating the encoded signal includes determining gain information based on a ratio of a first energy corresponding to filtered high-band output to a second energy corresponding to the low-band portion to reduce an audible effect of the artifact-generating condition.

公开(公告)号：US20170084284A1

公开(公告)日：2017-03-23

申请号：US15368354

申请日：2016-12-02

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Atti ,  Venkatesh Krishnan

IPC: G10L19/08 ,  G10L21/038 ,  G10L19/24 ,  G10L19/02

CPC classification number: G10L19/08 ,  G10L19/0212 ,  G10L19/24 ,  G10L21/038

Abstract: A method includes receiving, at a first device, a bit-stream from a second device. The method also includes generating, at a decoder of the first device, a low-band excitation signal from the bit-stream. The method also includes generating a first baseband signal at a high-band excitation generator of the decoder. Generating the first baseband signal includes performing a spectral flip operation on a nonlinearly transformed version of the low-band excitation signal, and the first baseband signal corresponds to a first sub-band of a high-band portion of an audio signal received at the second device. The method also includes generating a second baseband signal corresponding to a second sub-band of the high-band portion of the audio signal. The method also includes outputting at least a partially reconstructed version of the audio signal based at least in part on the first baseband signal and the second baseband signal.

公开(公告)号：US09564141B2

公开(公告)日：2017-02-07

申请号：US14617524

申请日：2015-02-09

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Venkatesh Krishnan ,  Venkatraman S. Atti ,  Vivek Rajendran

IPC: G10L19/00 ,  G10L19/02 ,  G10L21/038 ,  G10L25/81 ,  G10L21/0272

CPC classification number: G10L19/0204 ,  G10L21/0272 ,  G10L21/038 ,  G10L25/81

Abstract: A method includes separating, at a device, an input audio signal into at least a low-band signal and a high-band signal. The low-band signal corresponds to a low-band frequency range and the high-band signal corresponds to a high-band frequency range. The method also includes selecting a non-linear processing function of a plurality of non-linear processing functions. The method further includes generating a first extended signal based on the low-band signal and the non-linear processing function. The method also includes generating at least one adjustment parameter based on the first extended signal, the high-band signal, or both.

Abstract translation: 一种方法包括在设备处将输入音频信号分离成至少低频带信号和高频带信号。 低频带信号对应于低频带频率范围，高频带信号对应于高频带频率范围。 该方法还包括选择多个非线性处理功能的非线性处理功能。 该方法还包括基于低频带信号和非线性处理功能产生第一扩展信号。 该方法还包括基于第一扩展信号，高频带信号或两者产生至少一个调整参数。

公开(公告)号：US09542955B2

公开(公告)日：2017-01-10

申请号：US14672868

申请日：2015-03-30

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan

IPC: G10L19/12 ,  G10L19/00 ,  G10L19/24 ,  G10L19/08 ,  G10L21/038

CPC classification number: G10L19/08 ,  G10L19/0212 ,  G10L19/24 ,  G10L21/038

Abstract: A method includes receiving, at a vocoder, an audio signal sampled at a first sample rate. The method also includes generating, at a low-band encoder of the vocoder, a low-band excitation signal based on a low-band portion of the audio signal. The method further includes generating a first baseband signal at a high-band encoder of the vocoder. Generating the first baseband signal includes performing a spectral flip operation on a nonlinearly transformed version of the low-band excitation signal. The first baseband signal corresponds to a first sub-band of a high-band portion of the audio signal. The method also includes generating a second baseband signal corresponding to a second sub-band of the high-band portion of the audio signal. The first sub-band is distinct from the second sub-band.

Abstract translation: 一种方法包括在声码器处接收以第一采样率采样的音频信号。 该方法还包括在声码器的低频带编码器处产生基于音频信号的低频带部分的低频带激励信号。 该方法还包括在声码器的高频带编码器处生成第一基带信号。 生成第一基带信号包括对低频带激励信号的非线性变换版本执行频谱翻转操作。 第一基带信号对应于音频信号的高频带部分的第一子带。 该方法还包括产生对应于音频信号的高频带部分的第二子带的第二基带信号。 第一个子带与第二个子带不同。

公开(公告)号：US09384746B2

公开(公告)日：2016-07-05

申请号：US14512892

申请日：2014-10-13

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan ,  Stephane Pierre Villette ,  Vivek Rajendran

IPC: G10L19/035 ,  G10L21/038 ,  G10L19/08 ,  G10L19/083 ,  G10L19/02

CPC classification number: G10L19/035 ,  G10L19/0204 ,  G10L19/08 ,  G10L19/083 ,  G10L21/038

Abstract: A method includes determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, where the audio signal includes a high-band portion and a low-band portion. The method also includes determining scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal. The method includes applying the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal and determining a second modeled high-band signal based on the scaled high-band excitation signal. The method includes determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal.

Abstract translation: 一种方法包括基于音频信号的低频带激励信号来确定第一建模的高频带信号，其中音频信号包括高频带部分和低频带部分。 该方法还包括基于第一建模高频带信号的子帧的能量和音频信号的高频带部分的对应子帧的能量来确定缩放因子。 该方法包括将缩放因子应用于建模的高频带激励信号以确定缩放的高频带激励信号，并且基于经缩放的高频带激励信号确定第二建模的高频带信号。 该方法包括基于第二建模高频带信号和音频信号的高频带部分确定增益参数。

公开(公告)号：US09236058B2

公开(公告)日：2016-01-12

申请号：US14015991

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Venkatesh Krishnan ,  Vivek Rajendran ,  Stephane Pierre Villette

IPC: G10L19/02 ,  G10L19/032 ,  G10L19/097

CPC classification number: G10L19/032 ,  G10L19/02 ,  G10L19/097

Abstract: A method for quantizing phase information on an electronic device is described. The method includes obtaining a speech signal. The method also includes determining a prototype pitch period signal based on the speech signal and transforming the prototype pitch period signal into a first frequency-domain signal. The method additionally includes mapping the first frequency-domain signal into a plurality of subbands. The method also includes determining a global alignment based on the first frequency-domain signal and quantizing the global alignment utilizing scalar quantization to obtain a quantized global alignment. The method additionally includes determining a plurality of band alignments corresponding to the plurality of subbands. The method also includes quantizing the plurality of band alignments utilizing vector quantization to obtain a quantized plurality of band alignments. The method further includes transmitting the quantized global alignment and the quantized plurality of band alignments.

Abstract translation: 描述用于量化电子设备上的相位信息的方法。 该方法包括获得语音信号。 该方法还包括基于语音信号确定原型音调周期信号，并将原型音调周期信号变换为第一频域信号。 该方法还包括将第一频域信号映射到多个子带中。 该方法还包括基于第一频域信号确定全局对准，并使用标量量化量化全局比对以获得量化的全局比对。 该方法还包括确定对应于多个子带的多个频带对准。 该方法还包括利用矢量量化来量化多个频带比对以获得量化的多个频带比对。 该方法还包括发送量化的全局比对和量化的多个频带比对。

公开(公告)号：US20150380006A1

公开(公告)日：2015-12-31

申请号：US14731198

申请日：2015-06-04

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan ,  Vivek Rajendran ,  Venkata Subrahmanyam Chandra Sekhar Chebiyyam ,  Subasingha Shaminda Subasingha

IPC: G10L19/12 ,  G10L19/032 ,  G10L21/0224 ,  G10L19/06 ,  G10L25/12

CPC classification number: G10L19/12 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/06 ,  G10L19/24 ,  G10L21/0224 ,  G10L21/038 ,  G10L25/12 ,  G10L2019/0016

Abstract: The present disclosure provides techniques for adjusting a temporal gain parameter and for adjusting linear prediction coefficients. A value of the temporal gain parameter may be based on a comparison of a synthesized high-band portion of an audio signal to a high-band portion of the audio signal. If a signal characteristic of an upper frequency range of the high-band portion satisfies a first threshold, the temporal gain parameter may be adjusted. A linear prediction (LP) gain may be determined based on an LP gain operation that uses a first value for an LP order. The LP gain may be associated with an energy level of an LP synthesis filter. The LP order may be reduced if the LP gain satisfies a second threshold.

公开(公告)号：US20150228288A1

公开(公告)日：2015-08-13

申请号：US14617524

申请日：2015-02-09

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Venkatesh Krishnan ,  Venkatraman S. Atti ,  Vivek Rajendran

IPC: G10L19/02

CPC classification number: G10L19/0204 ,  G10L21/0272 ,  G10L21/038 ,  G10L25/81

Abstract: A method includes separating, at a device, an input audio signal into at least a low-band signal and a high-band signal. The low-band signal corresponds to a low-band frequency range and the high-band signal corresponds to a high-band frequency range. The method also includes selecting a non-linear processing function of a plurality of non-linear processing functions. The method further includes generating a first extended signal based on the low-band signal and the non-linear processing function. The method also includes generating at least one adjustment parameter based on the first extended signal, the high-band signal, or both.

Abstract translation: 一种方法包括在设备处将输入音频信号分离成至少低频带信号和高频带信号。 低频带信号对应于低频带频率范围，高频带信号对应于高频带频率范围。 该方法还包括选择多个非线性处理功能的非线性处理功能。 该方法还包括基于低频带信号和非线性处理功能产生第一扩展信号。 该方法还包括基于第一扩展信号，高频带信号或两者产生至少一个调整参数。