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1. 发明申请

WO2003003789A3 METHOD AND APPARATUS FOR MINIMIZING LATENCY IN DIGITAL SIGNAL PROCESSING SYSTEMS 审中-公开
公开(公告)号：WO2003003789A3
公开(公告)日：2003-01-09
申请号：PCT/US2002/020223
申请日：2002-06-25
申请人： SONIC INNOVATIONS, INC.
发明人： XIALOING, Fang , DAVIS, Keith, L. , JOHNSON, Martin, R.
IPC分类号： H04R3/00
摘要： A method and apparatus for minimizing latency in digital signal processing paths. One example is an active noise cancellation device. The system includes a digital closed feedback loop having a forward path and a feedback path. The forward path includes a compensation filter, a digital-to-analog converter, and an output transducer. The feedback path includes an input transducer, a feedback delta-sigma modulator, and a feedback sampling-rate converter. An input signal is processed in one of several ways into a processed digital input signal having a preselected intermediate sampling rate. Through the feedback path, an analog output signal is processed into a digital feedback signal having substantially the same preselected intermediate sampling rate. The processed digital input signal and the digital feedback signal are combined and processed through the forward path to produce an antidisturbance signal that is combined with a disturbance signal form the analog output signal.

2. 发明申请

WO2003003789A2 METHOD AND APPARATUS FOR MINIMIZING LATENCY IN DIGITAL SIGNAL PROCESSING SYSTEMS 审中-公开
标题翻译：用于最小化数字信号处理系统中的延迟的方法和装置
公开(公告)号：WO2003003789A2
公开(公告)日：2003-01-09
申请号：PCT/US2002/020223
申请日：2002-06-25
申请人： SONIC INNOVATIONS, INC.
发明人： XIALOING, Fang , DAVIS, Keith, L. , JOHNSON, Martin, R.
IPC分类号： H04R3/00
CPC分类号： H04R3/00
摘要： A method and apparatus for minimizing latency in digital signal processing paths. One example is an active noise cancellation device. The system includes a digital closed feedback loop having a forward path and a feedback path. The forward path includes a compensation filter, a digital-to-analog converter, and an output transducer. The feedback path includes an input transducer, a feedback delta-sigma modulator, and a feedback sampling-rate converter. An input signal is processed in one of several ways into a processed digital input signal having a preselected intermediate sampling rate. Through the feedback path, an analog output signal is processed into a digital feedback signal having substantially the same preselected intermediate sampling rate. The processed digital input signal and the digital feedback signal are combined and processed through the forward path to produce an antidisturbance signal that is combined with a disturbance signal form the analog output signal.
摘要翻译：一种用于最小化数字信号处理路径中的等待时间的方法和装置。一个实例是主动噪声消除装置。该系统包括具有正向路径和反馈路径的数字闭合反馈回路。正向路径包括补偿滤波器，数模转换器和输出换能器。反馈路径包括输入变换器，反馈Δ-Σ调制器和反馈采样率转换器。将输入信号以几种方式之一处理成具有预选中间采样率的经处理的数字输入信号。通过反馈路径，模拟输出信号被处理成具有基本上相同的预选中间采样率的数字反馈信号。处理的数字输入信号和数字反馈信号通过正向路径组合和处理，以产生与由模拟输出信号形成的干扰信号组合的抗干扰信号。

3. 发明公开

EP1417860A2 METHOD AND APPARATUS FOR MINIMIZING LATENCY IN DIGITAL SIGNAL PROCESSING SYSTEMS 审中-公开
标题翻译：方法和系统，为VERMINDERUND等待时间的数字信号处理系统
公开(公告)号：EP1417860A2
公开(公告)日：2004-05-12
申请号：EP02744641.8
申请日：2002-06-25
申请人： Sonic Innovations, Inc.
发明人： XIALOING, Fang , DAVIS, Keith, L. , JOHNSON, Martin, R.
IPC分类号： H04R3/00 , G10K11/178
CPC分类号： H04R3/00
摘要： A method and apparatus for minimizing latency in digital signal processing paths. One example is an active noise cancellation device. The system includes a digital closed feedback loop having a forward path and a feedback path. The forward path includes a compensation filter, a digital-to-analog converter, and an output transducer. The feedback path includes an input transducer, a feedback delta-sigma modulator, and a feedback sampling-rate converter. An input signal is processed in one of several ways into a processed digital input signal having a preselected intermediate sampling rate. Through the feedback path, an analog output signal is processed into a digital feedback signal having substantially the same preselected intermediate sampling rate. The processed digital input signal and the digital feedback signal are combined and processed through the forward path to produce an antidisturbance signal that is combined with a disturbance signal form the analog output signal.

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