公开(公告)号：US09680507B2

公开(公告)日：2017-06-13

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: H04L1/00 ,  H03M13/35 ,  H04L1/20 ,  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.

公开(公告)号：US20170148460A1

公开(公告)日：2017-05-25

申请号：US15422856

申请日：2017-02-02

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Atti ,  Venkatesh Krishnan

IPC: G10L19/16 ,  G10L19/035 ,  H03G3/30 ,  G10L19/06

CPC classification number: G10L19/167 ,  G10L19/032 ,  G10L19/035 ,  G10L19/06 ,  G10L21/038 ,  G10L2019/0003 ,  H03G3/301 ,  H03G3/3089

Abstract: A method of performing gain adjustment in an electronic device includes determining a first set of spectral frequency values and determining a second set of spectral frequency values. The first set of spectral frequency values corresponds to a high-band portion of an audio signal received at the electronic device. The second set of spectral frequency values approximates the first set of spectral frequency values in the high band portion of the audio signal. The method includes estimating a spectral distortion corresponding to a difference between the first set of spectral frequency values and the second set of spectral frequency values and adjusting, based on the spectral distortion, a gain value corresponding to at least a portion of the audio signal. The method also includes transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set of spectral frequency values.

公开(公告)号：US20160036560A1

公开(公告)日：2016-02-04

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: H04L1/00 ,  H04L1/08

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

Abstract: A device includes a receiver, a buffer, and an analyzer. The 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. The buffer is configured to store the packets. The 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.

Abstract translation: 一种设备包括接收器，缓冲器和分析器。 接收器被配置为接收对应于分组序列的至少一个子集并且包括纠错数据的分组。 分组的第一分组的纠错数据包括第二分组的部分副本。 缓冲区被配置为存储数据包。 分析器被配置为确定序列的第一特定分组是否从缓冲器丢失，以确定第一特定分组的部分副本是否作为第二特定分组中的纠错数据存储在缓冲器中，以更新值 至少部分地基于第一特定分组是否从缓冲器丢失，并且第一特定分组的部分副本被存储在缓冲器中，并且至少部分地基于该值来调整错误恢复参数。

公开(公告)号：US09099098B2

公开(公告)日：2015-08-04

申请号：US13670312

申请日：2012-11-06

Applicant: Qualcomm Incorporated

Inventor： Venkatraman Srinivasa Atti ,  Venkatesh Krishnan

IPC: G10L15/00 ,  G10L15/20 ,  G10L25/84

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。

公开(公告)号：US20150170662A1

公开(公告)日：2015-06-18

申请号：US14568359

申请日：2014-12-12

Applicant: QUALCOMM Incorporated

Inventor： Venkatesh Krishnan ,  Venkatraman S. Atti

IPC: G10L19/02

CPC classification number: G10L19/02 ,  G10L19/0204 ,  G10L19/04 ,  G10L19/08 ,  G10L21/038 ,  G10L21/0388

Abstract: A method includes filtering, at a speech encoder, an audio signal into a first group of sub-bands within a first frequency range and a second group of sub-bands within a second frequency range. The method also includes generating a harmonically extended signal based on the first group of sub-bands. The method further includes generating a third group of sub-bands based, at least in part, on the harmonically extended signal. The third group of sub-bands corresponds to the second group of sub-bands. The method also includes determining a first adjustment parameter for a first sub-band in the third group of sub-bands or a second adjustment parameter for a second sub-band in the third group of sub-bands. The first adjustment parameter is based on a metric of a first sub-band in the second group of sub-bands, and the second adjustment parameter is based on a metric of a second sub-band in the second group of sub-bands.

Abstract translation: 一种方法包括在语音编码器处将音频信号滤波成第一频率范围内的第一组子带和第二频率范围内的第二组子带。 该方法还包括基于第一组子带生成谐波扩展信号。 该方法还包括至少部分地基于谐波扩展信号来产生第三组子带。 第三组子带对应于第二组子带。 该方法还包括确定第三子带组中的第一子带的第一调整参数或第三子带组中的第二子带的第二调整参数。 第一调整参数基于第二子带组中的第一子带的度量，第二调整参数基于第二子带组中的第二子带的度量。

公开(公告)号：US20140236588A1

公开(公告)日：2014-08-21

申请号：US14016004

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Venkatesh Krishnan ,  Vivek Rajendran

IPC: G10L19/02

CPC classification number: G10L19/02 ,  G10L19/005 ,  G10L19/04 ,  G10L19/06 ,  G10L19/07

Abstract: A method for mitigating potential frame instability by an electronic device is described. The method includes obtaining a frame subsequent in time to an erased frame. The method also includes determining whether the frame is potentially unstable. The method further includes applying a substitute weighting value to generate a stable frame parameter if the frame is potentially unstable.

Abstract translation: 描述了一种用于减轻电子设备的可能的帧不稳定性的方法。 该方法包括在擦除的帧中获得随后的帧。 该方法还包括确定帧是否潜在地不稳定。 所述方法还包括如果所述帧潜在地不稳定则应用替代加权值以产生稳定的帧参数。

公开(公告)号：US20140236585A1

公开(公告)日：2014-08-21

申请号：US14015996

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

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

IPC: G10L13/02

CPC classification number: G10L13/02 ,  G10L19/005 ,  G10L19/10 ,  G10L25/90

Abstract: A method for determining pitch pulse period signal boundaries by an electronic device is described. The method includes obtaining a signal. The method also includes determining a first averaged curve based on the signal. The method further includes determining at least one first averaged curve peak position based on the first averaged curve and a threshold. The method additionally includes determining pitch pulse period signal boundaries based on the at least one first averaged curve peak position. The method also includes synthesizing a speech signal.

Abstract translation: 描述了一种通过电子设备确定音调脉冲周期信号边界的方法。 该方法包括获得信号。 该方法还包括基于该信号来确定第一平均曲线。 该方法还包括基于第一平均曲线和阈值确定至少一个第一平均曲线峰值位置。 该方法还包括基于至少一个第一平均曲线峰值位置来确定音调脉冲周期信号边界。 该方法还包括合成语音信号。

公开(公告)号：US20140236584A1

公开(公告)日：2014-08-21

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: G10L19/032

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：US20140236583A1

公开(公告)日：2014-08-21

申请号：US14015834

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Vivek Rajendran ,  Subasingha Shaminda Subasingha ,  Venkatesh Krishnan

IPC: G10L19/07 ,  G10L13/02 ,  G10L19/02

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：US20140229171A1

公开(公告)日：2014-08-14

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: G10L19/03

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.

Abstract translation: 特定方法包括基于与包括低频带部分和高频带部分的音频信号相对应的频谱信息来确定音频信号包括对应于假象产生条件的分量。 该方法还包括对音频信号的高频带部分进行滤波并产生编码信号。 生成编码信号包括基于与经滤波的高频带输出相对应的第一能量与对应于低频带部分的第二能量的比率确定增益信息，以减少伪影产生条件的可听见的影响。