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1. 发明授权

EP3035712B1 IMPROVEMENT OF AN AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO 有权转让
标题翻译：用参数立体声改进FM立体声无线电接收机的音频信号
公开(公告)号：EP3035712B1
公开(公告)日：2017-11-08
申请号：EP16150443.6
申请日：2010-09-07
申请人： Dolby International AB
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , ROEDEN, Karl Jonas
IPC分类号： H04S3/00 , H04S1/00 , H04S5/00 , H04H40/45 , H04B1/16 , G10L19/008 , H04H40/72 , H04H40/81
CPC分类号： H04S3/00 , G10L19/008 , H04H40/45 , H04H40/72 , H04H40/81 , H04S1/00 , H04S1/007 , H04S5/00 , H04S2420/03
摘要： The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.

2. 发明公开

EP3000182A1 METHOD AND CIRCUIT FOR SIGNAL QUALITY ESTIMATION AND CONTROL 有权
标题翻译：方法和电路信号质量确定和控制
公开(公告)号：EP3000182A1
公开(公告)日：2016-03-30
申请号：EP14801644.7
申请日：2014-05-22
申请人： Texas Instruments Incorporated
发明人： GUPTA, Pankaj , MURALI, Sriram , BALAKRISHNAN, Jaiganesh , VISHWAKARMA, Sanjay
IPC分类号： H04B1/16 , H04H40/72
CPC分类号： H04H60/58 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81
摘要： In an embodiment, a method of signal quality estimation and control includes generating a demodulated signal associated with a radio signal (802). A value is estimated of radio frequency signal-to-noise ratio (RFSNR) for the radio signal (806) based on information associated with a quality of the demodulated signal (804). Estimating the value of RFSNR facilitates in signal quality estimation of the radio signal and in control of the demodulated signal.

3. 发明公开

EP2709324A1 Multipath interference reduction 有权
标题翻译：多径干扰减少
公开(公告)号：EP2709324A1
公开(公告)日：2014-03-19
申请号：EP12184322.1
申请日：2012-09-13
申请人： NXP B.V.
发明人： Gautama, Temujin
IPC分类号： H04L25/03 , H04B1/16 , H04H40/72
CPC分类号： H04R5/04 , H04H40/72 , H04L25/03159
摘要： The invention provides an audio signal processing system in which a magnitude spectrum of a frequency domain audio signal is processed based on a measure of multipath interference. The processing keeps the magnitude spectrum approximately fixed during periods of multipath interference, for example by replacing it with a temporally smoothed version of the magnitude spectrum.. The magnitude spectrum (processed if required) and the phase spectrum are combined to derive a frequency domain output, which is transformed to the time domain.
摘要翻译：本发明提供了一种音频信号处理系统，其中基于多径干扰的测量来处理频域音频信号的幅度谱。该处理使得幅度谱在多路径干扰期间保持近似固定，例如通过用幅度谱的时间平滑版本替换幅度谱。幅度谱（如果需要，处理）和相位谱被组合以导出频域输出，它被转换到时域。

4. 发明授权

EP3000182B1 METHOD AND CIRCUIT FOR SIGNAL QUALITY ESTIMATION AND CONTROL 有权
公开(公告)号：EP3000182B1
公开(公告)日：2023-07-12
申请号：EP14801644.7
申请日：2014-05-22
发明人： GUPTA, Pankaj , MURALI, Sriram , BALAKRISHNAN, Jaiganesh , VISHWAKARMA, Sanjay
IPC分类号： H04B1/16 , H04H40/72 , H04H40/81

5. 发明公开

EP3570465A1 BEAM FORMING FOR FIRST ADJACENT CANCELLATION 有权
公开(公告)号：EP3570465A1
公开(公告)日：2019-11-20
申请号：EP19172589.4
申请日：2019-05-03
申请人： NXP B.V.
发明人： VAN HOUTUM, Wim
IPC分类号： H04H40/72 , H04H20/30 , H04B7/08
摘要： A communications device includes aspects for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated sidebands of in-band on-channel (IBOC) broadcasted signals. The communications device may include a radio frequency (RF) signal-reception circuit including two RF-signal paths driven in response to signals received via at least two respective antennas, and configured to respond to signals carried in the respective RF-signal paths by providing pre-processed RF output signals. The communications device may further include a beam-forming circuit driven in response to signals received at the at least two respective antennas and configured and arranged to facilitate first-adjacent interference cancellation (FAC). The communications device can also include an interference-cancelling circuit configured and arranged to reduce the first-adjacent co-channel interference signals by combining a beam-forming output signal provided by the beam-forming circuit with the pre-processed RF output signals as part of a maximum ratio combining (MRC) process.

6. 发明公开

EP3035712A1 IMPROVEMENT OF AN AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO 有权转让
标题翻译： VERBESSERUNG EINES TONSIGNALS EINES FM-STEREOFUNKEMPFÄNGERSMIT PARAMETRISCHEM STEREO
公开(公告)号：EP3035712A1
公开(公告)日：2016-06-22
申请号：EP16150443.6
申请日：2010-09-07
申请人： Dolby International AB
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , ROEDEN, Karl Jonas
IPC分类号： H04S3/00 , H04S1/00 , H04S5/00 , H04H40/45 , H04B1/16 , G10L19/008 , H04H40/72 , H04H40/81
CPC分类号： H04S3/00 , G10L19/008 , H04H40/45 , H04H40/72 , H04H40/81 , H04S1/00 , H04S1/007 , H04S5/00 , H04S2420/03
摘要： The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.
摘要翻译：本发明涉及一种用于改进FM立体声无线电接收机的立体声音频信号的装置。该装置包括参数立体声（PS）参数估计级。参数估计级被配置为基于立体声音频信号以频率变化或频率不变的方式来确定一个或多个参数立体声参数。优选地，这些PS参数是时间和频率变化的。此外，该装置包括上混级。上混级被配置为基于第一音频信号和一个或多个参数立体声参数来生成改进的立体声信号。第一音频信号是从立体声音频信号获得的。通过在混合阶段的下混合操作。 PS参数估计阶段可以是PS编码器的一部分。上混级可以是PS解码器的一部分。

7. 发明公开

EP2800279A1 Demodulation of attenuated FM modulated audio signals 有权
标题翻译：解调vongedämpftenFM modulierten Audiosignalen
公开(公告)号：EP2800279A1
公开(公告)日：2014-11-05
申请号：EP13166129.0
申请日：2013-05-01
申请人： Analog Devices Technology
发明人： Thaly, Amogh , Venkitasubramani, Anand , Browne, Michael Joseph
IPC分类号： H04B1/12 , H04B1/16 , H04H40/45 , H04H40/72 , H04N5/60 , H04N17/00
CPC分类号： H04B1/123 , H04B1/1653 , H04B1/1669 , H04H40/72 , H04N21/8106
摘要： Methods and apparatus are described, including a method of receiving an audio signal, the method comprising receiving a modulated signal, demodulating the modulated signal to obtain the audio signal, detecting attenuation of the received modulated signal and, if attenuation is detected, holding or filtering the audio signal. The energy level of the received modulated signal is monitored and compared with a fixed or variable threshold.
摘要翻译：描述了包括接收音频信号的方法的方法和装置，所述方法包括接收调制信号，解调调制信号以获得音频信号，检测接收到的调制信号的衰减，并且如果检测到衰减，则保持或滤波音频信号。监测接收到的调制信号的能级，并将其与固定或可变阈值进行比较。

8. 发明授权

EP2800279B1 Demodulation of attenuated FM modulated audio signals 有权
标题翻译：衰减FM调制音频信号的解调
公开(公告)号：EP2800279B1
公开(公告)日：2018-04-25
申请号：EP13166129.0
申请日：2013-05-01
申请人： Analog Devices Global Unlimited Company
发明人： Thaly, Amogh , Venkitasubramani, Anand , Browne, Michael Joseph
IPC分类号： H04B1/12 , H04B1/16 , H04H40/45 , H04H40/72 , H04N5/60 , H04N21/81 , H04N17/00
CPC分类号： H04B1/123 , H04B1/1653 , H04B1/1669 , H04H40/72 , H04N21/8106
摘要： Methods and apparatus are described, including a method of receiving an audio signal, the method comprising receiving a modulated signal, demodulating the modulated signal to obtain the audio signal, detecting attenuation of the received modulated signal and, if attenuation is detected, holding or filtering the audio signal. The energy level of the received modulated signal is monitored and compared with a fixed or variable threshold.

9. 发明公开

EP3000182A4 METHOD AND CIRCUIT FOR SIGNAL QUALITY ESTIMATION AND CONTROL 有权
标题翻译： VERFAHREN UND SCHALTUNG ZURSIGNALQUALITÄTSBESTIMMUNGUND -STEUERUNG
公开(公告)号：EP3000182A4
公开(公告)日：2017-02-22
申请号：EP14801644
申请日：2014-05-22
申请人： TEXAS INSTRUMENTS INC
发明人： GUPTA PANKAJ , MURALI SRIRAM , BALAKRISHNAN JAIGANESH , VISHWAKARMA SANJAY
IPC分类号： H04B1/16 , H04H40/72 , H04H40/81
CPC分类号： H04H60/58 , H04B1/1646 , H04H40/45 , H04H40/72 , H04H40/81

10. 发明公开

EP2615739A1 Processor for an FM signal receiver and processing method 有权
标题翻译： FM-Signalempfängerund Verarbeitungsverfahren Prozessorfüreinen
公开(公告)号：EP2615739A1
公开(公告)日：2013-07-17
申请号：EP12151208.1
申请日：2012-01-16
申请人： NXP B.V.
发明人： Gautama, Temujin
IPC分类号： H04B1/16 , H04H40/72
CPC分类号： H04H20/89 , H04B1/1676 , H04H40/72
摘要： A processing unit for processing a multi-channel audio signal has a delay element (40) for delaying an FM sum signal (sum) and a converter arrangement (T) for converting an FM difference signal (diff) and a noise signal (diffnoise) to the frequency domain. Frequency-based noise suppression is used to derive a de-noised frequency-domain difference signal using a gain function which is limited to a maximal and a minimal value. This is then converted to the time domain, and the first and second audio signals are calculated from a delayed sum signal (sum2) and the de-noised time domain difference signal (diff2).
摘要翻译：用于处理多声道音频信号的处理单元具有用于延迟FM和信号（sum）的延迟元件（40）和用于转换FM差分信号（diff）和噪声信号（diffnoise）的转换器装置（T）到频域。使用基于频率的噪声抑制来使用限于最大和最小值的增益函数来导出去噪的频域差分信号。然后将其转换为时域，并且从延迟和信号（sum2）和去噪时间差分信号（diff2）计算第一和第二音频信号。

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