专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2011113025A3 ADJUSTABLE SAMPLING RATE CONVERTER 审中-公开
标题翻译：可调采样率转换器
公开(公告)号：WO2011113025A3
公开(公告)日：2011-11-10
申请号：PCT/US2011028228
申请日：2011-03-11
申请人： QUALCOMM INC , WANG SONG , BALATSOS ARIS
发明人： WANG SONG , BALATSOS ARIS
IPC分类号： H04L7/00 , H04L25/05
CPC分类号： H04L7/0029 , H04L25/068
摘要： Techniques of this disclosure provide for adjustment of a conversion rate of a sampling rate converter (SRC) in real-time. The SRC determines relative timing of generated output samples based on non-approximated integer components that are recursively updated. The SRC may further base relative timing of output samples on a value of one or more step size components associated with the integer components. Also according to techniques of this disclosure, a conversion rate of an SRC may be adjusted in real-time based on a detected mismatch between a source clock of a digital input signal and a local clock.
摘要翻译：本公开的技术提供实时调整采样率转换器（SRC）的转换率。 SRC根据递归更新的非近似整数分量确定生成的输出采样的相对时序。 SRC可以进一步将输出样本的相对定时基于与整数分量相关联的一个或多个步长分量的值。同样根据本公开的技术，可基于检测到的数字输入信号的源时钟和本地时钟之间的失配来实时调整SRC的转换速率。

2. 发明申请

WO2011041738A3 SUPPRESSING NOISE IN AN AUDIO SIGNAL 审中-公开
标题翻译：在音频信号中抑制噪声
公开(公告)号：WO2011041738A3
公开(公告)日：2011-07-14
申请号：PCT/US2010051209
申请日：2010-10-01
申请人： QUALCOMM INC , RAMAKRISHNAN DINESH , SHAHRI HOMAYOUN , WANG SONG
发明人： RAMAKRISHNAN DINESH , SHAHRI HOMAYOUN , WANG SONG
IPC分类号： G10L21/02 , G11B20/24
CPC分类号： G10L21/0208 , G10L21/0232
摘要： An electronic device for suppressing noise in an audio signal is described. The electronic device includes a processor and instructions stored in memory. The electronic device receives an input audio signal and computes an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate. The electronic device also computes an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits. A set of gains is also computed using a spectral expansion gain function. The spectral expansion gain function is based on the overall noise estimate and the adaptive factor. The electronic device also applies the set of gains to the input audio signal to produce a noise-suppressed audio signal and provides the noise-suppressed audio signal.
摘要翻译：描述了用于抑制音频信号中的噪声的电子设备。电子设备包括处理器和存储在存储器中的指令。电子设备接收输入音频信号，并且基于静态噪声估计，非平稳噪声估计和过量噪声估计来计算总体噪声估计。电子设备还基于输入信噪比（SNR）和一个或多个SNR限制来计算自适应因子。还使用频谱扩展增益函数来计算一组增益。频谱扩展增益函数基于总噪声估计和自适应因子。电子设备还将该组增益应用于输入音频信号以产生噪声抑制的音频信号并提供噪声抑制音频信号。

3. 发明申请

WO2007146599A2 INTEGER REPRESENATION OF RELATIVE TIMING BETWEEN DESIRED OUTPUT SAMPLES AND CORRESPONDING INPUT SAMPLES 审中-公开
标题翻译：所有输出样本和相关输入样本之间相对时间的整体表示
公开(公告)号：WO2007146599A2
公开(公告)日：2007-12-21
申请号：PCT/US2007070038
申请日：2007-05-31
申请人： QUALCOMM INC , WANG SONG , CHOY EDDIE L T , GUPTA SAMIR KUMAR
发明人： WANG SONG , CHOY EDDIE L T , GUPTA SAMIR KUMAR
IPC分类号： H03H17/06
CPC分类号： H03H17/0685
摘要： In general, this disclosure describes techniques for changing a sampling frequency of a digital signal. In particular, the techniques provide a more accurate way to determining a relative timing between a desired output sample and a corresponding input sample using a non-approximated integer representation of the relative timing. The relative timing between the desired output sample and corresponding input sample may be represented using a first component that identifies a latest input sample of the digital signal used to generate intermediate samples, a second component that identifies an intermediate sample, and a third component that identifies a timing difference between the desired output sample and the intermediate sample. Each of the components may be recursively updated using non-approximated integer values.
摘要翻译：通常，本公开描述了用于改变数字信号的采样频率的技术。特别地，这些技术提供了使用相对定时的非近似整数表示来确定期望输出采样和相应输入采样之间的相对定时的更精确的方法。可以使用标识用于生成中间样本的数字信号的最新输入样本的第一组件，标识中间样本的第二组件和标识中间样本的第三组件来表示期望输出样本与相应输入样本之间的相对时序所需输出样本和中间样本之间的时间差。可以使用非近似的整数值递归地更新每个组件。

4. 发明申请

WO2009117474A2 SYSTEMS AND METHODS FOR DETECTING WIND NOISE USING MULTIPLE AUDIO SOURCES 审中-公开
标题翻译：用多个音频源检测风噪声的系统和方法
公开(公告)号：WO2009117474A2
公开(公告)日：2009-09-24
申请号：PCT/US2009037485
申请日：2009-03-18
申请人： QUALCOMM INC , RAMAKRISHNAN DINESH , WANG SONG
发明人： RAMAKRISHNAN DINESH , WANG SONG
IPC分类号： H04R3/00 , H04R25/00
CPC分类号： H04R3/005 , H04R2410/07 , H04R2499/11
摘要： A method for detecting wind noise is described. At least two audio signals are received. The at least two audio signals are filtered to reduce higher frequencies and to reduce lower frequencies to provide at least two filtered audio signals. The cross correlation of the at least two filtered audio signals is computed for multiple delays. A maximum cross correlation is determined from the cross correlations computed for the multiple delays. Wind noise is detected by comparing the maximum cross correlation with a threshold.
摘要翻译：描述了用于检测风噪声的方法。至少接收到两个音频信号。对至少两个音频信号进行滤波以降低较高频率并降低较低频率以提供至少两个滤波的音频信号。针对多个延迟计算至少两个滤波的音频信号的互相关。根据为多个延迟计算的互相关确定最大互相关。通过比较最大互相关与阈值来检测风噪声。

5. 发明申请

WO2007095624A3 DIGITAL DOMAIN SAMPLING RATE CONVERTER 审中-公开
标题翻译：数字采样速率转换器
公开(公告)号：WO2007095624A3
公开(公告)日：2007-10-11
申请号：PCT/US2007062250
申请日：2007-02-15
申请人： QUALCOMM INC , WANG SONG , CHOY EDDIE L T , KULKAMI PRAJAKT V , GUPTA SAMIR KUMAR
发明人： WANG SONG , CHOY EDDIE L T , KULKAMI PRAJAKT V , GUPTA SAMIR KUMAR
IPC分类号： H03H17/06
CPC分类号： H03H17/0685 , H03H17/0294
摘要： Techniques are described for sampling rate conversion in the digital domain by up-sampling and down-sampling a digital signal according to a selected intermediate sampling frequency. A prototype anti-aliasing filter that has a bandwidth with multiple factors is stored in memory. The techniques include selecting an intermediate sampling frequency to be an integer multiple of a desired output sampling frequency of a digital signal based on the factors of the prototype filter, and selecting a down-sampling factor to be the same integer associated with the selected intermediate sampling frequency. A filter generator generates an anti-aliasing filter for the selected down-sampling factor based on the prototype filter. A sampling rate converter up-samples the digital signal at an input sampling frequency to the selected intermediate sampling frequency, filters the digital signal with the derived anti-aliasing filter, and down-samples the digital signal by the selected down-sampling factor to the desired output sampling frequency.
摘要翻译：描述了通过根据所选择的中间采样频率对数字信号进行上采样和下采样来对数字域中的采样率转换进行描述的技术。具有多个因素的带宽的原型抗混叠滤波器存储在存储器中。这些技术包括基于原型滤波器的因素来选择中间采样频率为数字信号的期望输出采样频率的整数倍，并且将下采样因子选择为与所选择的中间采样相关联的整数频率。滤波器发生器基于原型滤波器生成用于所选择的下采样因子的抗混叠滤波器。采样率转换器将数字信号以输入采样频率向采样频率进行上采样，以采样导出的抗混叠滤波器对数字信号进行滤波，并通过选择的下采样因子将数字信号下采样到所需输出采样频率。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式