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公开(公告)号：US10405094B2
公开(公告)日：2019-09-03
申请号：US15702821
申请日：2017-09-13
发明人： Yuli You
IPC分类号： H03G5/00 , H04R3/04 , H04N21/233 , H04R1/22 , H03G5/16 , G10H1/16 , G10H3/12 , H04R3/00 , H03G3/00
摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: (a) an input line that inputs an original audio signal; (b) a bass extraction filter that extracts a bass portion of such original audio signal; (c) an estimator that estimates a fundamental frequency of a bass sound within such bass portion; (d) a frequency translator that shifts the bass portion by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; (f) an adder having (i) inputs coupled to the original audio signal and to the virtual bass signal and (ii) an output; and (g) an audio output device coupled to the output of the adder.
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公开(公告)号：US10333483B2
公开(公告)日：2019-06-25
申请号：US15964683
申请日：2018-04-27
发明人： Yuli You
摘要： Provided are, among other things, systems, methods and techniques for loudness-based audio-signal compensation. According to one such system, an input line accepts an input audio signal; a loudness estimator, coupled to the input line, processes the input audio signal to obtain an audio playback loudness level and also provides a production loudness level for the input audio signal; and a filter generator/selector coupled to an output of the loudness estimator provides an audio compensation filter based on the production loudness level and the audio playback loudness level. The input signal is processed by the audio compensation filter to provide an output signal.
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公开(公告)号：US10325583B2
公开(公告)日：2019-06-18
申请号：US15725217
申请日：2017-10-04
发明人： Jimeng Zheng , Yuli You
摘要： Provided are, among other things, systems, methods and techniques for audio-signal processing. One representative embodiment includes HT sub-band analysis/decomposition modules, e.g., one for each audio channel and one for an echo reference signal. Each HT sub-band analysis/decomposition module includes a Hilbert Transformation module and an analysis/decomposition filter bank and provides sub-band outputs. Echo-cancellation modules, e.g., one for each audio channel, perform echo-cancellation processing on such sub-bands. Beamforming modules, e.g., one for each sub-band, then perform beamforming, e.g., across all audio channels. Finally, a resynthesis stage combines the different sub-band outputs in order to provide a system output signal.
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公开(公告)号：US20180248531A1
公开(公告)日：2018-08-30
申请号：US15964683
申请日：2018-04-27
发明人： Yuli You
摘要： Provided are, among other things, systems, methods and techniques for loudness-based audio-signal compensation. According to one such system, an input line accepts an input audio signal; a loudness estimator, coupled to the input line, processes the input audio signal to obtain an audio playback loudness level and also provides a production loudness level for the input audio signal; and a filter generator/selector coupled to an output of the loudness estimator provides an audio compensation filter based on the production loudness level and the audio playback loudness level. The input signal is processed by the audio compensation filter to provide an output signal.
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公开(公告)号：US20200005802A1
公开(公告)日：2020-01-02
申请号：US16022819
申请日：2018-06-29
发明人： Yuli You
IPC分类号： G10L19/025 , G10L19/26
摘要： Provided are systems, methods and techniques for compressing the dynamic range of an audio signal. In one implementation: an input audio signal is obtained, and a time-varying gain signal is provided based on it and a desired output range. The time-varying preliminary gain signal is then applied to the input audio signal to provide an output audio signal. Provision of the time-varying gain signal involves lowpass filtering a signal that is based on the input audio signal, using an attack gain-response time and a release gain-response time as filtering parameters, with the attack gain-response time decreased and the release gain-response time increased in response to a determination that a transient is occurring in the input audio signal.
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公开(公告)号：US20190342663A1
公开(公告)日：2019-11-07
申请号：US16517630
申请日：2019-07-21
发明人： Yuli You
IPC分类号： H04R3/04
摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: an input line that inputs an original audio signal; an estimator, coupled to the input line, that estimates a fundamental frequency of a bass sound within the original audio signal; a bass extraction filter, coupled to the input line, that extracts a bass portion of the original audio signal that is at least 1 octave wide and includes the fundamental frequency; a frequency translator, coupled to the bass extraction filter, that shifts the bass portion, in its entirety, by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; and an adder having 1) inputs coupled to the original audio signal and to the virtual bass signal and 2) an output.
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公开(公告)号：US20190267959A1
公开(公告)日：2019-08-29
申请号：US16405712
申请日：2019-05-07
发明人： Yuli You
摘要： Provided are, among other things, systems, methods and techniques for loudness-based audio-signal compensation. According to one such system, an input line accepts an input audio signal; a loudness estimator, coupled to the input line, processes the input audio signal to obtain an audio playback loudness level and also provides a production loudness level for the input audio signal; and a filter generator/selector coupled to an output of the loudness estimator provides an audio compensation filter based on the production loudness level and the audio playback loudness level. The input signal is processed by the audio compensation filter to provide an output signal.
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公开(公告)号：US20180014125A1
公开(公告)日：2018-01-11
申请号：US15702821
申请日：2017-09-13
发明人： Yuli You
IPC分类号： H04R3/04 , H04N21/233 , H04R1/22
CPC分类号： H04R3/04 , G10H1/16 , G10H3/125 , G10H2210/321 , H03G5/005 , H03G5/165 , H04N21/233 , H04R1/22 , H04R3/00 , H04R2430/01
摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: (a) an input line that inputs an original audio signal; (b) a bass extraction filter that extracts a bass portion of such original audio signal; (c) an estimator that estimates a fundamental frequency of a bass sound within such bass portion; (d) a frequency translator that shifts the bass portion by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; (f) an adder having (i) inputs coupled to the original audio signal and to the virtual bass signal and (ii) an output; and (g) an audio output device coupled to the output of the adder.
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公开(公告)号：US09794688B2
公开(公告)日：2017-10-17
申请号：US14929225
申请日：2015-10-30
发明人： Yuli You
CPC分类号： H04R3/04 , G10H2210/321 , H03G5/165 , H04R2430/01
摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: (a) an input line that inputs an original audio signal; (b) a transform module that transforms the original audio signal into a set of frequency components; (c) a bass extraction filter that extracts a bass portion of such frequency components; (d) an estimator that estimates a fundamental frequency of a bass sound within such bass portion; (e) a frequency translator that shifts the bass portion by a frequency that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; (f) an adder having (i) inputs coupled to the original audio signal and to the virtual bass signal and (ii) an output; and (g) an audio output device coupled to the output of the adder.
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公开(公告)号：US09590580B1
公开(公告)日：2017-03-07
申请号：US14852576
申请日：2015-09-13
发明人： Yuli You
IPC分类号： H03G3/32
摘要： Provided are, among other things, systems, methods and techniques for loudness-based audio-signal compensation. According to one such system, an input line accepts an input audio signal; a loudness estimator, coupled to the input line, processes the input audio signal to obtain an audio playback loudness level and also provides a production loudness level for the input audio signal; and a filter generator/selector coupled to an output of the loudness estimator provides an audio compensation filter based on the production loudness level and the audio playback loudness level. The input signal is processed by the audio compensation filter to provide an output signal.
摘要翻译： 尤其是基于响度的音频信号补偿的系统，方法和技术。 根据一个这样的系统，输入线接受输入音频信号; 耦合到输入线的响度估计器处理输入音频信号以获得音频回放响度级别，并且还为输入音频信号提供生成响度级别; 并且耦合到响度估计器的输出端的滤波器发生器/选择器基于生产响度级别和音频回放响度级别提供音频补偿滤波器。 输入信号由音频补偿滤波器处理以提供输出信号。
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