公开(公告)号：US09047863B2

公开(公告)日：2015-06-02

申请号：US13718797

申请日：2012-12-18

Applicant: Qualcomm Incorporated

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

IPC: G10L19/005 ,  G10L19/04 ,  G10L19/008 ,  H04L1/00 ,  H04L1/08 ,  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: A method of audio signal processing is described. The method includes calculating a criticality measure based on information about a first frame of the audio signal. The method also includes calculating a threshold value based on information relating to a state of a transmission channel. The method further includes comparing the calculated criticality measure to the calculated threshold value. The method additionally includes deciding to transmit a redundant copy of the first frame based on a result of the comparison. The method also includes transmitting the redundant copy of the first frame with a second frame. The first frame precedes the second frame in the audio signal.

Abstract translation: 描述音频信号处理的方法。 该方法包括基于关于音频信号的第一帧的信息计算临界度度量。 该方法还包括基于与传输信道的状态有关的信息来计算阈值。 该方法还包括将计算的临界度测量值与所计算的阈值进行比较。 该方法还包括基于比较的结果决定发送第一帧的冗余副本。 该方法还包括用第二帧发送第一帧的冗余副本。 第一帧在音频信号中的第二帧之前。

公开(公告)号：US20150106106A1

公开(公告)日：2015-04-16

申请号：US14509817

申请日：2014-10-08

Applicant: QUALCOMM Incorporated

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

IPC: G10L19/002 ,  G10L19/02

Abstract: A method includes receiving a second audio frame at a decoder. The second audio frame follows a first audio frame in an audio signal and includes a first number of bits allocated to primary coding information associated with the second audio frame, a second number of bits allocated to redundant coding information associated with the first audio frame, and an indicator of a frame type of the first audio frame. In response to a frame erasure condition associated with the first audio frame, the second number of bits is determined based on the indicator and used to decode the first audio frame. In clean channel conditions, the first audio frame is received and decoded based on primary coding bits in the first audio frame, and the first number of bits is determined based on the indicator and used to decode the second audio frame.

Abstract translation: 一种方法包括在解码器处接收第二音频帧。 第二音频帧遵循音频信号中的第一音频帧，并且包括分配给与第二音频帧相关联的主编码信息的第一数量的比特，分配给与第一音频帧相关联的冗余编码信息的第二数量的比特，以及 第一音频帧的帧类型的指示符。 响应于与第一音频帧相关联的帧擦除条件，基于指示符确定第二数量位，并用于解码第一音频帧。 在清洁信道条件下，基于第一音频帧中的主编码比特来接收和解码第一音频帧，并且基于指示符确定第一比特数，并用于解码第二音频帧。

公开(公告)号：US20150100318A1

公开(公告)日：2015-04-09

申请号：US14046806

申请日：2013-10-04

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Rajagopalan ,  Venkatesh Krishnan ,  Alok K. Gupta

IPC: G10L19/16 ,  G10L21/02 ,  G10L13/00

CPC classification number: G10L19/005 ,  G10L19/09

Abstract: A method for decoding a speech signal is described. The method includes obtaining a packet. The method also includes obtaining a previous lag value. The method further includes limiting the previous lag value if the previous lag value is greater than a maximum lag threshold. The method additionally includes disallowing an adjustment to a number of synthesized peaks if a combination of the number of synthesized peaks and an estimated number of peaks is not valid.

Abstract translation: 描述用于解码语音信号的方法。 该方法包括获得分组。 该方法还包括获得先前的滞后值。 该方法还包括如果先前滞后值大于最大滞后阈值则限制前一个滞后值。 该方法还包括如果合成峰值的数量和估计的峰值数量的组合无效，则不允许对多个合成峰值进行调整。

公开(公告)号：US20140236587A1

公开(公告)日：2014-08-21

申请号：US14015984

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Vivek Rajendran ,  Venkatesh Krishnan ,  Venkatraman Srinivasa Atti

IPC: G10L19/12

CPC classification number: G10L19/12 ,  G10L19/24

Abstract: A method for controlling an average encoding rate by an electronic device is described. The method includes obtaining a speech signal. The method also includes determining a first average rate. The method further includes determining a first threshold based on the first average rate. The method additionally includes controlling the average encoding rate by determining at least one other threshold based on the first threshold. The method also includes sending an encoded speech signal.

Abstract translation: 描述了一种通过电子设备来控制平均编码速率的方法。 该方法包括获得语音信号。 该方法还包括确定第一平均速率。 该方法还包括基于第一平均速率确定第一阈值。 该方法还包括通过基于第一阈值确定至少一个其他阈值来控制平均编码率。 该方法还包括发送编码语音信号。

公开(公告)号：US10141001B2

公开(公告)日：2018-11-27

申请号：US15636501

申请日：2017-06-28

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Atti ,  Vivek Rajendran ,  Venkatesh Krishnan

IPC: G10L19/26 ,  G10L19/06 ,  G10L19/09 ,  G10L21/0216 ,  G10L19/00

Abstract: An apparatus includes a first calculator configured to determine a long-term noise estimate of the audio signal. The apparatus also includes a second calculator configured to determine a formant-sharpening factor based on the determined long-term noise estimate. The apparatus includes a filter configured to filter a codebook vector to generate a filtered codebook vector. The filter is based on the determined formant-sharpening factor, and the codebook vector is based on information from the audio signal. The apparatus further includes an audio coder configured to generate a formant-sharpened low-band excitation signal based on the filtered codebook vector.

公开(公告)号：US09842598B2

公开(公告)日：2017-12-12

申请号：US14016004

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Venkatesh Krishnan ,  Vivek Rajendran

IPC: G10L19/02 ,  G10L19/04 ,  G10L19/06 ,  G10L19/07 ,  G10L19/005

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.

公开(公告)号：US09818419B2

公开(公告)日：2017-11-14

申请号：US15368354

申请日：2016-12-02

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman S. Atti ,  Venkatesh Krishnan

IPC: G10L19/12 ,  G10L19/00 ,  G10L19/08 ,  G10L19/24 ,  G10L21/038 ,  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：US09263054B2

公开(公告)日：2016-02-16

申请号：US14015984

申请日：2013-08-30

Applicant: QUALCOMM Incorporated

Inventor： Subasingha Shaminda Subasingha ,  Vivek Rajendran ,  Venkatesh Krishnan ,  Venkatraman Srinivasa Atti

IPC: G10L19/24 ,  G10L19/12

CPC classification number: G10L19/12 ,  G10L19/24

Abstract: A method for controlling an average encoding rate by an electronic device is described. The method includes obtaining a speech signal. The method also includes determining a first average rate. The method further includes determining a first threshold based on the first average rate. The method additionally includes controlling the average encoding rate by determining at least one other threshold based on the first threshold. The method also includes sending an encoded speech signal.

Abstract translation: 描述了一种通过电子设备来控制平均编码速率的方法。 该方法包括获得语音信号。 该方法还包括确定第一平均速率。 该方法还包括基于第一平均速率确定第一阈值。 该方法还包括通过基于第一阈值确定至少一个其他阈值来控制平均编码率。 该方法还包括发送编码语音信号。

公开(公告)号：US20160036564A1

公开(公告)日：2016-02-04

申请号：US14809098

申请日：2015-07-24

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/08 ,  H04L1/00

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

Abstract: A device includes a receiver, a buffer, a transmitter, and an analyzer. The receiver is configured to receive a plurality of packets that corresponds to at least a subset of a sequence of packets. Error correction data of a first packet of the plurality of packets includes a partial copy of a second packet of the plurality of packets. The analyzer is configured to determine whether a particular packet of the sequence is missing from the buffer, and to determine whether a partial copy of the particular packet is stored in the buffer. The analyzer is also configured to send, via the transmitter, a retransmit message to a second device based at least in part on determining that the buffer does not store the particular packet and that the buffer does not store the partial copy of the particular packet.

Abstract translation: 设备包括接收器，缓冲器，发射器和分析器。 接收器被配置为接收对应于分组序列的至少一个子集的多个分组。 多个分组的第一分组的纠错数据包括多个分组中的第二分组的部分副本。 分析器被配置为确定序列的特定分组是否从缓冲器丢失，并且确定特定分组的部分副本是否存储在缓冲器中。 分析器还被配置为至少部分地基于确定缓冲器不存储特定分组并且缓冲器不存储特定分组的部分副本，经由发送器向第二设备发送重传消息。

公开(公告)号：US20150380007A1

公开(公告)日：2015-12-31

申请号：US14731276

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

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.

Abstract translation: 本公开提供了用于调整时间增益参数和用于调整线性预测系数的技术。 时间增益参数的值可以基于音频信号的合成高频带部分与音频信号的高频带部分的比较。 如果高频带部分的较高频率范围的信号特征满足第一阈值，则可以调整时间增益参数。 可以基于对LP阶使用第一值的LP增益操作来确定线性预测（LP）增益。 LP增益可以与LP合成滤波器的能级相关联。 如果LP增益满足第二阈值，LP阶可以减小。