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公开(公告)号：US09130643B2
公开(公告)日：2015-09-08
申请号：US13362244
申请日：2012-01-31
申请人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
发明人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
CPC分类号： H04B1/1661 , H03G3/345 , H04B1/04 , H04B1/7183
摘要： Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, quadrature L−R demodulation is applied to a composite baseband signal output by an FM demodulator to obtain an L−R noise signal. A channel quality measure is calculated based on the L−R noise signal and is used to control whether a pop suppression technique is applied to an L+R signal obtained from the composite baseband signal to detect and remove noise pulses therefrom. The channel quality measure and the L−R noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on an L−R signal obtained from the composite baseband signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.
摘要翻译： 描述了用于增强FM接收机的音频质量的系统和方法。 在本文描述的实施例中，正交L-R解调被应用于由FM解调器输出的复合基带信号以获得L-R噪声信号。 基于L-R噪声信号计算信道质量度量，并且用于控制是否将弹出抑制技术应用于从复合基带信号获得的L + R信号，以从其检测和去除噪声脉冲。 信道质量测量和L-R噪声信号也被用于在从复合基带信号和L + R信号获得的L-R信号上对频域执行单信道噪声抑制。 信道质量测量还用于控制快速衰落补偿过程的应用，其中替换了通过波形外推产生的替换波形的L-R和L + R信号的噪声段。
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公开(公告)号：US20130195164A1
公开(公告)日：2013-08-01
申请号：US13362277
申请日：2012-01-31
申请人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
发明人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
CPC分类号： H04B1/1676 , H03G3/345 , H04B1/04 , H04B1/1661 , H04B1/7183 , H04S1/007 , H04S2400/09
摘要： Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, a stop band noise signal is extracted from an L+R or L−R signal produced by an FM stereo decoder. A channel quality measure is calculated based on the stop band noise signal and is used to control whether a pop suppression technique is applied to the L+R signal. The channel quality measure and the stop band noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on the L−R signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.
摘要翻译： 描述了用于增强FM接收机的音频质量的系统和方法。 在本文所描述的实施例中，从由FM立体声解码器产生的L + R或L-R信号中提取阻带噪声信号。 基于阻带噪声信号计算信道质量度量，并且用于控制是否对L + R信号应用流行抑制技术。 信道质量测量和阻带噪声信号也被用于在L-R信号和L + R信号的频域中进行单信道噪声抑制。 信道质量测量还用于控制快速衰落补偿过程的应用，其中替换了通过波形外推产生的替换波形的L-R和L + R信号的噪声段。
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公开(公告)号：US20130195163A1
公开(公告)日：2013-08-01
申请号：US13362244
申请日：2012-01-31
申请人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
发明人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
CPC分类号： H04B1/1661 , H03G3/345 , H04B1/04 , H04B1/7183
摘要： Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, quadrature L−R demodulation is applied to a composite baseband signal output by an FM demodulator to obtain an L−R noise signal. A channel quality measure is calculated based on the L−R noise signal and is used to control whether a pop suppression technique is applied to an L+R signal obtained from the composite baseband signal to detect and remove noise pulses therefrom. The channel quality measure and the L−R noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on an L−R signal obtained from the composite baseband signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.
摘要翻译： 描述了用于增强FM接收机的音频质量的系统和方法。 在本文描述的实施例中，正交L-R解调被应用于由FM解调器输出的复合基带信号以获得L-R噪声信号。 基于L-R噪声信号计算信道质量度量，并且用于控制是否将弹出抑制技术应用于从复合基带信号获得的L + R信号，以从其检测和去除噪声脉冲。 信道质量测量和L-R噪声信号也被用于在从复合基带信号和L + R信号获得的L-R信号上对频域执行单信道噪声抑制。 信道质量测量还用于控制快速衰落补偿过程的应用，其中替换了通过波形外推产生的替换波形的L-R和L + R信号的噪声段。
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公开(公告)号：US09178553B2
公开(公告)日：2015-11-03
申请号：US13362277
申请日：2012-01-31
申请人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
发明人： Juin-Hwey Chen , Thomas F. Baker , Evan S. McCarthy , Jes Thyssen , Walter J. Wihardja , David C. Garrett
CPC分类号： H04B1/1676 , H03G3/345 , H04B1/04 , H04B1/1661 , H04B1/7183 , H04S1/007 , H04S2400/09
摘要： Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, a stop band noise signal is extracted from an L+R or L−R signal produced by an FM stereo decoder. A channel quality measure is calculated based on the stop band noise signal and is used to control whether a pop suppression technique is applied to the L+R signal. The channel quality measure and the stop band noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on the L−R signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.
摘要翻译： 描述了用于增强FM接收机的音频质量的系统和方法。 在本文所描述的实施例中，从由FM立体声解码器产生的L + R或L-R信号中提取阻带噪声信号。 基于阻带噪声信号计算信道质量度量，并且用于控制是否对L + R信号应用流行抑制技术。 信道质量测量和阻带噪声信号也被用于在L-R信号和L + R信号的频域中进行单信道噪声抑制。 信道质量测量还用于控制快速衰落补偿过程的应用，其中替换了通过波形外推产生的替换波形的L-R和L + R信号的噪声段。
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