公开(公告)号：US20140229170A1

公开(公告)日：2014-08-14

申请号：US13959090

申请日：2013-08-05

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Srinivasa Atti ,  Venkatesh Krishnan

IPC: G10L19/03

CPC classification number: G10L19/03 ,  G10L21/0264 ,  G10L21/038

Abstract: A particular method includes determining, based on an inter-line spectral pair (LSP) spacing corresponding to an audio signal, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes, in response to determining that the audio signal includes the component, adjusting a gain parameter corresponding to the audio signal. For example, the gain parameter may be adjusted via gain attenuation and/or gain smoothing.

Abstract translation: 特定方法包括基于对应于音频信号的线间频谱对（LSP）间隔来确定音频信号包括对应于假象产生条件的分量。 该方法还包括响应于确定音频信号包括该分量，调整对应于该音频信号的增益参数。 例如，可以通过增益衰减和/或增益平滑来调整增益参数。

公开(公告)号：US09741350B2

公开(公告)日：2017-08-22

申请号：US13959090

申请日：2013-08-05

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Srinivasa Atti ,  Venkatesh Krishnan

IPC: G10L19/03 ,  G10L21/0264 ,  G10L21/038

CPC classification number: G10L19/03 ,  G10L21/0264 ,  G10L21/038

Abstract: A particular method includes determining, based on an inter-line spectral pair (LSP) spacing corresponding to an audio signal, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes, in response to determining that the audio signal includes the component, adjusting a gain parameter corresponding to the audio signal. For example, the gain parameter may be adjusted via gain attenuation and/or gain smoothing.

公开(公告)号：US09728200B2

公开(公告)日：2017-08-08

申请号：US14026765

申请日：2013-09-13

Applicant: QUALCOMM Incorporated

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

IPC: G10L19/26

CPC classification number: G10L19/265 ,  G10L19/06 ,  G10L19/09 ,  G10L19/26 ,  G10L21/0216 ,  G10L2019/0011 ,  G10L2021/02168

Abstract: A method of processing an audio signal includes determining an average signal-to-noise ratio for the audio signal over time. The method includes, based on the determined average signal-to-noise ratio, a formant-sharpening factor is determined. The method also includes applying a filter that is based on the determined formant-sharpening factor to a codebook vector that is based on information from the audio signal.

公开(公告)号：US09685164B2

公开(公告)日：2017-06-20

申请号：US14671757

申请日：2015-03-27

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/12 ,  G10L19/20 ,  G10L21/038

CPC classification number: G10L19/02 ,  G10L19/12 ,  G10L19/20 ,  G10L21/038

Abstract: A particular method includes encoding a first frame of an audio signal using a first encoder. The method also includes generating, during encoding of the first frame, a baseband signal that includes content corresponding to a high band portion of the audio signal. The method further includes encoding a second frame of the audio signal using a second encoder, where encoding the second frame includes processing the baseband signal to generate high band parameters associated with the second frame.

公开(公告)号：US09336789B2

公开(公告)日：2016-05-10

申请号：US14015834

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Vivek Rajendran ,  Subasingha Shaminda Subasingha ,  Venkatesh Krishnan

IPC: G10L19/07 ,  G10L19/005

CPC classification number: G10L19/07 ,  G10L19/005

Abstract: A method for determining an interpolation factor set by an electronic device is described. The method includes determining a value based on a current frame property and a previous frame property. The method also includes determining whether the value is outside of a range. The method further includes determining an interpolation factor set based on the value and a prediction mode indicator if the value is outside of the range. The method additionally includes synthesizing a speech signal.

Abstract translation: 描述用于确定由电子设备设置的内插因子的方法。 该方法包括基于当前帧属性和先前帧属性来确定值。 该方法还包括确定该值是否在范围之外。 该方法还包括：如果该值在该范围之外，则基于该值确定内插因子集和预测模式指示符。 该方法还包括合成语音信号。

公开(公告)号：US20160028418A1

公开(公告)日：2016-01-28

申请号：US14749474

申请日：2015-06-24

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/35 ,  H04L1/00 ,  H04L12/26

CPC classification number: H03M13/353 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0023 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/205 ,  H04L43/087

Abstract: A method includes determining, at a decoder of a first device, an offset value corresponding to an offset between a first particular packet and a second particular packet. The first device includes a de-jitter buffer. The method also includes transmitting the offset value to an encoder of a second device to enable the second device to send packets to the first device based on the offset value.

Abstract translation: 一种方法包括在第一设备的解码器处确定与第一特定分组和第二特定分组之间的偏移相对应的偏移值。 第一个设备包括一个去抖动缓冲区。 该方法还包括将偏移值发送到第二设备的编码器，以使第二设备能够基于偏移值向第一设备发送分组。

公开(公告)号：US20150380008A1

公开(公告)日：2015-12-31

申请号：US14750784

申请日：2015-06-25

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan

IPC: G10L19/26

CPC classification number: G10L19/265 ,  G10L19/04 ,  G10L21/038

Abstract: A method includes generating a first signal corresponding to a first component of a high-band portion of an audio signal. The first component has a first frequency range. The method includes generating a high-band excitation signal corresponding to a second component of the high-band portion of the audio signal. The second component has a second frequency range differs from the first frequency range. The high-band excitation signal is provided to a filter having filter coefficients generated based on the first signal to generate a synthesized version of the high-band portion of the audio signal.

Abstract translation: 一种方法包括产生对应于音频信号的高频带部分的第一分量的第一信号。 第一个组件具有第一个频率范围。 该方法包括产生对应于音频信号的高频带部分的第二分量的高频带激励信号。 第二分量具有与第一频率范围不同的第二频率范围。 高频激励信号被提供给具有基于第一信号产生的滤波器系数的滤波器，以产生音频信号的高频带部分的合成版本。

公开(公告)号：US09053702B2

公开(公告)日：2015-06-09

申请号：US13719701

申请日：2012-12-19

Applicant: Qualcomm Incorporated

Inventor： Vivek Rajendran ,  Venkatesh Krishnan ,  Daniel J. Sinder

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/04 ,  G10L19/008 ,  H04L1/00 ,  H04L1/08 ,  G10L19/005 ,  G10L19/107 ,  G10L19/09

CPC classification number: G10L19/04 ,  G10L19/005 ,  G10L19/008 ,  G10L19/09 ,  G10L19/107 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/007 ,  H04L1/08

Abstract: Compressibility-based reallocation of initial bit allocations for frames of an audio signal is described. Applications to redundancy-based retransmission of critical frames (e.g., for fixed-bit-rate modes of speech codec operation) are also described.

Abstract translation: 描述了对音频信号的帧的初始位分配的基于压缩性的重新分配。 还描述了用于关键帧冗余重传（例如，对于固定比特率模式的语音编解码器操作）的应用。

公开(公告)号：US20150149157A1

公开(公告)日：2015-05-28

申请号：US14550737

申请日：2014-11-21

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkata Subrahmanyam Chandra Sekhar Chebiyyam ,  Venkatesh Krishnan ,  Stephane Pierre Villette

IPC: G10L19/02 ,  G10L19/26

CPC classification number: G10L19/0204 ,  G10L19/0208 ,  G10L19/022 ,  G10L19/24 ,  G10L19/265

Abstract: A method includes determining, at a speech encoder, frequency domain gain shape parameters. The frequency domain gain shape parameters are based on a second signal associated with an audio signal. The method further includes adjusting a first signal based on the frequency domain gain shape parameters. The first signal is associated with the audio signal. The method also includes inserting the frequency domain gain shape parameters into an encoded version of the audio signal to enable gain adjustment during reproduction of the audio signal from the encoded version of the audio signal.

Abstract translation: 一种方法包括在语音编码器处确定频域增益形状参数。 频域增益形状参数基于与音频信号相关联的第二信号。 该方法还包括基于频域增益形状参数调整第一信号。 第一个信号与音频信号相关联。 该方法还包括将频域增益形状参数插入到音频信号的编码版本中，以便在从音频信号的编码版本再现音频信号期间实现增益调整。

公开(公告)号：US20130191117A1

公开(公告)日：2013-07-25

申请号：US13670312

申请日：2012-11-06

Applicant: Qualcomm Incorporated

Inventor： Venkatraman Srinivasa Atti ,  Venkatesh Krishnan

IPC: G10L21/02 ,  G10L15/20

CPC classification number: G10L25/84

Abstract: In speech processing systems, compensation is made for sudden changes in the background noise in the average signal-to-noise ratio (SNR) calculation. SNR outlier filtering may be used, alone or in conjunction with weighting the average SNR. Adaptive weights may be applied on the SNRs per band before computing the average SNR. The weighting function can be a function of noise level, noise type, and/or instantaneous SNR value. Another weighting mechanism applies a null filtering or outlier filtering which sets the weight in a particular band to be zero. This particular band may be characterized as the one that exhibits an SNR that is several times higher than the SNRs in other bands.

Abstract translation: 在语音处理系统中，对平均信噪比（SNR）计算中背景噪声的突然变化进行补偿。 可以单独使用SNR异常值滤波或与加权平均SNR结合使用。 在计算平均SNR之前，每个频带的SNR可以应用自适应权重。 加权函数可以是噪声电平，噪声类型和/或瞬时SNR值的函数。 另一个加权机制应用将特定频带中的权重设置为零的空滤波或异常值滤波。 该特定频带可以被表征为具有比其他频带中的SNR高几倍的SNR的特征频带。