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公开(公告)号：EP3312991A1
公开(公告)日：2018-04-25
申请号：EP17205925.5
申请日：2009-03-03
发明人： BAZARJANI, Seyfollah , MIAO, Guoqing , FITZGERALD, Joseph, R. , KULKARNI, Prajakt, V. , GAGNE, Justin, Joseph Rosen , MCALLISTER, Gene, H. , HINRICHS, Jeffrey , VAN DER WAGT,, Jan, Paul
CPC分类号： H03F1/0222 , H03F1/0211 , H03F2200/03 , H03G3/30 , H03G3/3005 , H03G3/32
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
摘要翻译： 提高音频系统功耗效率的系统和方法。 本质上，该技术是响应于由音量控制模块指示的音量水平和/或响应于所检测到的输入特性而调整从电源传送到诸如功率放大器的模拟部分的功率 音频信号。 因此，以这种方式，模拟部分以与其正在处理的信号的电平有关的方式进行操作。 此外，该系统和方法还涉及调整数字信号和模拟信号的动态范围以提高系统的整体动态范围而不需要消耗额外功率的技术。
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公开(公告)号：EP2269301A2
公开(公告)日：2011-01-05
申请号：EP09716435.4
申请日：2009-03-03
发明人： BAZARJANI, Seyfollah , MIAO, Guoqing , FITZGERALD, Joseph, R. , KULKARNI, Prajakt, V. , GAGNE, Justin, Joseph Rosen , MCALLISTER, Gene, H. , HINRICHS, Jeffrey , VAN DER WAGT, Jan, Paul
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
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公开(公告)号：EP2193605A1
公开(公告)日：2010-06-09
申请号：EP08835931.0
申请日：2008-09-26
发明人： CHILAKAPATI, Uma , BAZARJANI, Seyfollah , FITZGERALD, Joseph , MIAO, Guoqing , NELSON, Hui-Ya , SIDIQI, Khalid J. , HINRICHS, Jeffrey
CPC分类号： H03M3/384 , H03M1/1019 , H03M1/66 , H03M3/50
摘要： A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.
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公开(公告)号：EP2269301B1
公开(公告)日：2020-04-15
申请号：EP09716435.4
申请日：2009-03-03
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公开(公告)号：EP2193605B1
公开(公告)日：2012-07-25
申请号：EP08835931.0
申请日：2008-09-26
发明人： CHILAKAPATI, Uma , BAZARJANI, Seyfollah , FITZGERALD, Joseph , MIAO, Guoqing , NELSON, Hui-Ya , SIDIQI, Khalid J. , HINRICHS, Jeffrey
CPC分类号： H03M3/384 , H03M1/1019 , H03M1/66 , H03M3/50
摘要： A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.
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