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1. 发明授权

US10389319B2 Methods and apparatus for adjusting a level of an audio signal 有权
公开(公告)号：US10389319B2
公开(公告)日：2019-08-20
申请号：US16211559
申请日：2018-12-06
申请人： Dolby Laboratories Licensing Corporation
发明人： Alan Jeffrey Seefeldt
IPC分类号： H03G3/00 , H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02 , G10L19/008
摘要： The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.

2. 发明申请

US20190115895A1 Methods and Apparatus For Adjusting A Level of An Audio Signal 审中-公开
公开(公告)号：US20190115895A1
公开(公告)日：2019-04-18
申请号：US16211586
申请日：2018-12-06
申请人： Dolby Laboratories Licensing Corporation
发明人： Alan Jeffrey Seefeldt
IPC分类号： H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L19/008 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02
CPC分类号： H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
摘要： The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.

3. 发明申请

US20190115892A1 Methods and Apparatus For Adjusting A Level of An Audio Signal 审中-公开
公开(公告)号：US20190115892A1
公开(公告)日：2019-04-18
申请号：US16211574
申请日：2018-12-06
申请人： Dolby Laboratories Licensing Corporation
发明人： Alan Jeffrey Seefeldt
IPC分类号： H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L19/008 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02
CPC分类号： H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
摘要： The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.

4. 发明申请

US20180102133A1 SYSTEM AND METHOD FOR NARROW BANDWIDTH DIGITAL SIGNAL PROCESSING 审中-公开
公开(公告)号：US20180102133A1
公开(公告)日：2018-04-12
申请号：US15683325
申请日：2017-08-22
申请人： Bongiovi Acoustics LLC
发明人： Anthony Bongiovi , Glenn Zelniker , Joseph G. Butera, III
IPC分类号： G10L19/26 , H03G9/14 , H03G5/00 , H03G9/00 , H03G9/02 , H03G3/00 , G10L21/034 , G10L21/0388 , H03G5/16
CPC分类号： G10L19/26 , G10L21/034 , G10L21/0388 , H03G3/00 , H03G5/005 , H03G5/165 , H03G9/005 , H03G9/025 , H03G9/14
摘要： The present invention provides methods and systems for narrow bandwidth digital processing of an input audio signal. Particularly, the present invention includes a high pass filter configured to filter the input audio signal. A first compressor then modulates the filtered signal in order to create a partially processed signal. In some embodiments, a clipping module further limits the gain of the partially processed signal. A splitter is configured to split the partially processed signal into a first signal and a second signal. A low pass filter is configured to filter the first signal. A pass through module is configured to adjust the gain of the second signal. A mixer then combines the filtered first signal and the gain-adjusted second signal in order to output a combined signal. In some embodiments, a tone control module further processes the combined signal, and a second compressor further modulates the processed signal.

5. 发明授权

US09906858B2 System and method for digital signal processing 有权
公开(公告)号：US09906858B2
公开(公告)日：2018-02-27
申请号：US15214146
申请日：2016-07-19
申请人： Bongiovi Acoustics LLC
发明人： Anthony Bongiovi , Philip Fuller , Glenn Zelniker
IPC分类号： H03G5/00 , H04R3/04 , H03G3/00 , G06F3/16 , H03G5/16 , H03G9/00 , H03G9/02 , G10L21/034 , H03G9/14 , G06F17/30 , H03G5/02 , H03G7/00
CPC分类号： H04R3/04 , G06F3/165 , G06F17/3074 , G10L21/034 , H03G3/002 , H03G3/005 , H03G5/025 , H03G5/165 , H03G7/002 , H03G7/007 , H03G9/005 , H03G9/025 , H03G9/14 , H04S7/307
摘要： A system and method for digital processing including a gain element to process an input audio signal, a high pass filter to then filter the signal and create a high pass signal, a first filter module to filter the high pass signal and create a first filtered signal and a splitter to split the high pass signal into two high pass signals. The first filter module filters one high pass signals before a first compressor modulates the signal or a high pass signal to create a modulated signal. A second filter module filters the modulated signal to create a second filtered signal that is processed by a first processing module including a band splitter that splits the signal into low and high band signals that are then modulated by compressors. A second processing module processes the modulated low and high band signals to create an output signal.

6. 发明申请

US20170201221A1 Calculating And Adjusting The Perceived Loudness And/Or The Perceived Spectral Balance Of An Audio Signal 有权
公开(公告)号：US20170201221A1
公开(公告)日：2017-07-13
申请号：US15469872
申请日：2017-03-27
申请人： Dolby Laboratories Licensing Corporation
发明人： Alan Jeffrey Seefeldt
IPC分类号： H03G9/02 , H03G9/00 , G10L25/21 , H04S3/02 , G10L19/008 , G10L21/038 , H03G3/32 , H03G9/14
CPC分类号： H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
摘要： The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.

7. 发明授权

US09680438B2 Method and device for playing modified audio signals 有权
公开(公告)号：US09680438B2
公开(公告)日：2017-06-13
申请号：US14788954
申请日：2015-07-01
申请人： Meq Inc.
发明人： Ofer Nlssim Raz , Danny Aronson
IPC分类号： H04R29/00 , H03G9/00 , H03G9/14 , G06F3/16
CPC分类号： G06F3/165 , G06F3/162 , H03G5/165 , H03G9/14 , H04R25/356 , H04R25/502 , H04R2205/041
摘要： A method and a device are provided for modifying audio signals in accordance with hearing capabilities of an individual who is listening to audio signals played by a music player. The method comprises the steps of: providing a music player operative to play audio signals, wherein the music player comprises a processor configured to modify audio signals that are about to be played, by taking into account the hearing capabilities of the individual; providing information that relates to the hearing capabilities of the individual; forwarding the information that relates to the hearing capabilities of the individual, from an electronic device to the music player; and using the music player processor to modify audio signals when the individual is listening to audio signals being played by the music player, wherein the audio signals are modified before they are played by taking into account the individual's hearing capabilities.

8. 发明授权

US09154102B2 System for combining loudness measurements in a single playback mode 有权
标题翻译：用于在单个播放模式下组合响度测量的系统
公开(公告)号：US09154102B2
公开(公告)日：2015-10-06
申请号：US13581453
申请日：2011-03-07
申请人： Martin Wolters , Michael Schug , Harald Mundt , Jeffrey Riedmiller
发明人： Martin Wolters , Michael Schug , Harald Mundt , Jeffrey Riedmiller
IPC分类号： H03G3/00 , H03G9/00 , H03G9/14
CPC分类号： H03G9/00 , H03G9/005 , H03G9/14
摘要： The present document relates to processing of multimedia data, notably the encoding, the transmission, the decoding and the rendering of multimedia data, e.g. audio files or bitstreams. In particular, the present document relates to the implementation of loudness control in multimedia players. A method for providing loudness related data to a media player is described. The method comprises the steps of providing a first loudness related value associated with an audio signal; wherein the first loudness related value has been determined according to a first procedure; of converting the first loudness related value into a second loudness related value using a reversible relation; wherein the second loudness related value is associated with a second procedure for determining loudness related values; of storing the second loudness related value in metadata associated with the audio signal; and of providing the metadata to the media player.
摘要翻译：本文件涉及多媒体数据的处理，特别是多媒体数据的编码，传输，解码和呈现，例如，音频文件或比特流。特别地，本文件涉及多媒体播放器中的响度控制的实现。描述了向媒体播放器提供响度相关数据的方法。该方法包括以下步骤：提供与音频信号相关联的第一响度相关值; 其中所述第一响度相关值已经根据第一过程确定; 使用可逆关系将第一响度相关值转换为第二响度相关值; 其中所述第二响度相关值与用于确定响度相关值的第二过程相关联; 将第二响度相关值存储在与音频信号相关联的元数据中; 并向媒体播放器提供元数据。

9. 发明申请

US20050207583A1 Audio enhancement system and method 有权
标题翻译：音频增强系统和方法
公开(公告)号：US20050207583A1
公开(公告)日：2005-09-22
申请号：US11085807
申请日：2005-03-21
申请人： Markus Christoph
发明人： Markus Christoph
IPC分类号： H03G3/20 , H03G3/32 , H03G9/02 , H03G9/14 , H04B15/00
CPC分类号： H03G9/005 , H03G3/32 , H03G9/025 , H03G9/14
摘要： An audio enhancement system for compensating for ambient noise in a listening environment, comprises an audio system that produces an electrical sound signal and generates a sound output from the electrical sound signal. A sensor (e.g., a microphone) senses a total sound signal representative of the total sound level in the listening environment, including the sound output from the audio system and the ambient noise within the listening environment. A processing unit responsive to the total sound signal and the electrical sound signal extracts from the total sound signal an ambient noise signal representative of the ambient noise in the listening environment. A controller responsive to the ambient noise signal performs a linear predictive coding (LPC) analysis and generates a control signal, which is input to an equalizer to adjust the sound output of the audio system in order to compensate for the ambient noise level.
摘要翻译：一种用于在收听环境中补偿环境噪声的音频增强系统，包括产生电声信号并从电声信号产生声音输出的音频系统。传感器（例如，麦克风）感测表示听音环境中的总声音水平的总声音信号，包括来自音频系统的声音输出和听音环境中的环境噪声。响应于总声音信号和电声信号的处理单元，从总声音信号中提取代表听觉环境中的环境噪声的环境噪声信号。响应于环境噪声信号的控制器执行线性预测编码（LPC）分析，并产生控制信号，该控制信号被输入到均衡器以调整音频系统的声音输出，以补偿环境噪声水平。

10. 发明授权

US4545258A Circuit with adjustable amplitude and rolloff frequency characteristics 失效
标题翻译：电路具有可调幅度和滚降频率特性
公开(公告)号：US4545258A
公开(公告)日：1985-10-08
申请号：US510953
申请日：1983-07-05
申请人： Thomas P. Coursolle
发明人： Thomas P. Coursolle
IPC分类号： H03F1/42 , H03F3/16 , H03G5/00 , H03G5/16 , H03G9/14 , G01F1/32
CPC分类号： H03G9/14 , H03G5/16
摘要： An electrical circuit provides an output signal having a frequency representative of an input signal which has a fundamental frequency responsive to a parameter. The circuit has an amplifier having an adjustable amplitude response with an input coupled to the input signal and an output for providing the output signal as a function of the input signal. A filter is coupled to the amplifier and to the output signal for at least partially determining the amplitude response of the amplifier. The filter has an adjustable rolloff frequency characteristic. An adjustable impedance is coupled to the filter to adjust the amplitude response of the amplifier and adjust the rolloff frequency characteristic of the filter as a function of the input signal. A controller is coupled to the output signal and provides a control signal for adjusting the adjustable impedance and hence the amplitude response of the amplifier and the rolloff frequency characteristic of the filter as a function of the output signal.
摘要翻译：电路提供具有表示具有响应于参数的基频的输入信号的频率的输出信号。该电路具有具有可调幅度响应的放大器，其中输入耦合到输入信号，以及用于根据输入信号提供输出信号的输出。滤波器耦合到放大器和输出信号，以至少部分地确定放大器的振幅响应。滤波器具有可调节的滚降频率特性。可调阻抗耦合到滤波器以调节放大器的振幅响应，并根据输入信号调整滤波器的滚降频率特性。控制器耦合到输出信号，并提供控制信号，用于根据输出信号调整可调阻抗，因此调节放大器的幅度响应和滤波器的滚降频率特性。

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