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1. 发明授权

US07518053B1 Beat matching for portable audio 有权
标题翻译：节拍匹配便携式音频
公开(公告)号：US07518053B1
公开(公告)日：2009-04-14
申请号：US11469745
申请日：2006-09-01
申请人： Daniel S. Jochelson , Stephen J. Fedigan
发明人： Daniel S. Jochelson , Stephen J. Fedigan
IPC分类号： A63H5/00 , G04B13/00 , G10H7/00
CPC分类号： G10H1/40 , G10H2210/076 , G10H2210/391 , G10H2250/621 , G10H2250/631
摘要： Beat matching for two audio streams extracts beats from each, computes a conversion ratio from one stream to the other stream by an initial beat alignment plus a stability-maintaining beat alignment. A variable resampling converter or time scale modifier adjusts one stream to align beats with those of the other (reference) stream. Thus for cross-fading two music streams the beats of the fading-in stream can be matched to those of the fading-out stream for a seamless transition.
摘要翻译：针对两个音频流的节拍匹配提取每个节目的节拍，通过初始拍子对准加上稳定性维持拍子对齐，计算从一个流到另一个流的转换比。可变重采样转换器或时间刻度修改器调整一个流以将节拍与其他（参考）流的节拍对齐。因此，对于两个音乐流的交叉衰落，衰落流的节拍可以与淡出流的节拍匹配以进行无缝转换。

2. 发明授权

US08724830B1 Multi-stream audio level controller 有权
标题翻译：多声道音频电平控制器
公开(公告)号：US08724830B1
公开(公告)日：2014-05-13
申请号：US11342514
申请日：2006-01-30
申请人： Stephen J. Fedigan , Daniel S. Jochelson
发明人： Stephen J. Fedigan , Daniel S. Jochelson
IPC分类号： H03G3/00 , H04B1/00
CPC分类号： H03G3/3089 , H03G3/3005
摘要： A volume level and crossfade controller with programmable fades and audio stream priority controls saturation for a multiple audio stream mixer. Start of fade and end of fade events trigger updates of relative volume level targets and volume ramps.
摘要翻译：具有可编程渐变和音频流优先级的音量级别和交叉淡入淡出控制器控制多音频流混频器的饱和度。淡入淡出事件的开始触发相对音量水平目标和音量斜坡的更新。

3. 发明申请

US20100251877A1 Beat Matching for Portable Audio 审中-公开
标题翻译：节拍匹配便携式音频
公开(公告)号：US20100251877A1
公开(公告)日：2010-10-07
申请号：US12818832
申请日：2010-06-18
申请人： Daniel S. Jochelson , Stephen J. Fedigan
发明人： Daniel S. Jochelson , Stephen J. Fedigan
IPC分类号： G10H7/00
CPC分类号： G10H1/40 , G10H2210/076 , G10H2210/391 , G10H2250/621 , G10H2250/631
摘要： Beat matching for two audio streams extracts beats from each, computes a conversion ratio from one stream to the other stream by an initial beat alignment plus a stability-maintaining beat alignment. A variable resampling converter or time scale modifier adjusts one stream to align beats with those of the other (reference) stream. Thus for cross-fading two music streams the beats of the fading-in stream can be matched to those of the fading-out stream for a seamless transition.
摘要翻译：针对两个音频流的节拍匹配提取每个节目的节拍，通过初始拍子对准加上稳定性维持拍子对齐，计算从一个流到另一个流的转换比。可变重采样转换器或时间刻度修改器调整一个流以将节拍与其他（参考）流的节拍对齐。因此，对于两个音乐流的交叉衰落，衰落流的节拍可以与淡出流的节拍匹配以进行无缝转换。

4. 发明授权

US06667597B2 Method of extending the operating speed range of a rotor flux based MRAS speed observer in a three phase AC induction motor 有权
标题翻译：将转子磁通量MRAS速度观测器的运行速度范围扩展到三相交流感应电机中的方法
公开(公告)号：US06667597B2
公开(公告)日：2003-12-23
申请号：US10256656
申请日：2002-09-27
申请人： Stephen J. Fedigan , Charles P. Cole
发明人： Stephen J. Fedigan , Charles P. Cole
IPC分类号： H02P534
CPC分类号： H02P21/13 , H02P21/18
摘要： A method of AC induction motor speed control employing a rotor flux based MRAS (Model Reference Adaptive System) speed observer. Rotor flux-based MRAS speed observers develop two independent rotor flux estimates. The reference rotor flux estimate is based on the currents and voltages in the stator windings, and the adaptive estimate is based on the stator currents and the measured or estimated rotor speed. These two estimates are compared by taking the cross product between them, and this error signal is passed into a proportional-integral (PI) controller, which adjusts the speed until the flux estimates agree with one another. While this method is well-established, the estimator poles become lightly damped at high speeds and prone to stability problems. In this invention, the upper speed range of the rotor flux-based MRAS speed observer is extended by discretely or continuously modifying the gain/bandwidth parameters of the low-pass filter in the adaptive flux estimator as a function of estimated speed.
摘要翻译：采用基于转子磁通的MRAS（型号参考自适应系统）速度观测器的交流感应电动机速度控制方法。基于转子磁通的MRAS速度观测器开发了两个独立的转子磁通估计。参考转子磁通估计基于定子绕组中的电流和电压，自适应估计基于定子电流和测量或估计的转子速度。通过将它们之间的交叉乘积进行比较，将这两个估计值进行比较，并将该误差信号传递到比例积分（PI）控制器，该控制器调整速度，直到通量估计值彼此一致。虽然这种方法是确定的，估计器极点在高速度下变得轻微阻尼，并且容易出现稳定性问题。在本发明中，通过离散地或连续地修改自适应通量估计器中的低通滤波器的增益/带宽参数作为估计速度的函数来扩展基于转子磁通的MRAS速度观测器的较高速度范围。

5. 发明授权

US08787594B1 Multi-stream audio level controller 有权
公开(公告)号：US08787594B1
公开(公告)日：2014-07-22
申请号：US11342513
申请日：2006-01-30
申请人： Stephen J. Fedigan , Daniel S. Jochalson , Jason D. Kridner , Jeffrey S. Hayes
发明人： Stephen J. Fedigan , Daniel S. Jochalson , Jason D. Kridner , Jeffrey S. Hayes
IPC分类号： H03G3/00 , H04B1/00
CPC分类号： H03G3/3089 , H03G3/3005
摘要： A volume level and crossfade controller with programmable fades and audio stream priority controls saturation for a multiple audio stream mixer. Start of fade and end of fade events trigger updates of relative volume level targets and volume ramps.

6. 发明授权

US07023770B2 Encoding rate-based, programmable, linear velocity, compressed audio compact disc player 有权
标题翻译：基于编码速率，可编程，线速度，压缩音频光盘播放器
公开(公告)号：US07023770B2
公开(公告)日：2006-04-04
申请号：US10242480
申请日：2002-09-12
申请人： Stephen J. Fedigan , Thomas N. Millikan
发明人： Stephen J. Fedigan , Thomas N. Millikan
IPC分类号： G11B7/00
CPC分类号： G11B20/10527 , G11B19/247 , G11B20/00007 , G11B2020/10703 , G11B2020/1074 , G11B2020/10805 , G11B2020/10814 , G11B2020/10981
摘要： An audio player permits compressed or uncompressed audio CDs to be played. The preferred player includes a spindle motor control that causes the CD to be spun at a constant linear velocity that is commensurate with the encoding rate of the file being played. In this manner, the data can be continuously pulled of the CD at just the right rate so that, after being decoded and decompressed, the data can be played. The player also dynamically adjusts its constant linear velocity to the encoding rate of the file being played to permit files on the same disc having different encoding rates to be played.
摘要翻译：音频播放器允许播放压缩或未压缩的音频CD。优选的播放器包括主轴电动机控制，其使CD以与正在播放的文件的编码速率相当的恒定线速度旋转。以这种方式，可以以恰好的速率连续拉取CD的数据，使得在解码和解压缩之后，可以播放数据。播放器还可以将其恒定的线速度动态地调整为正在播放的文件的编码速率，以允许播放具有不同编码速率的同一盘上的文件。

7. 发明授权

US07541946B2 Relaxation oscillator based keypad decoder 有权
标题翻译：基于松弛振荡器的键盘解码器
公开(公告)号：US07541946B2
公开(公告)日：2009-06-02
申请号：US11386132
申请日：2006-03-22
申请人： Stephen J. Fedigan
发明人： Stephen J. Fedigan
IPC分类号： H03M11/00
CPC分类号： H03M11/24
摘要： The keypad interface element of this invention uses a relaxation oscillator and a digital keypad processor having a counter/timer to decode specific keys. The RC portion of the relaxation oscillator includes a resistance ladder and a set of momentary on pushbutton switches disposed change resistance dependent upon which key is pressed. This causes the relaxation oscillator to produce an output signal having a corresponding frequency. The counter/timer of the digital keypad processor produces a count corresponding to the oscillator frequency. The digital keypad processor latches and holds a binary number specifically identifying the depressed key. A state machine in the digital keypad processor provides transient-free, noise immune keypad decoding.
摘要翻译：本发明的键盘接口元件使用张弛振荡器和具有计数器/定时器的数字小键盘处理器来解码特定键。张弛振荡器的RC部分包括电阻梯和一组瞬时按钮开关，根据按下哪个键设置变化电阻。这使得张弛振荡器产生具有相应频率的输出信号。数字键盘处理器的计数器/定时器产生对应于振荡器频率的计数。数字键盘处理器锁存并保存特定识别按下的键的二进制数。数字键盘处理器中的状态机提供无瞬态，噪声免疫键盘解码。

8. 发明授权

US07345600B1 Asynchronous sampling rate converter 有权
标题翻译：异步采样率转换器
公开(公告)号：US07345600B1
公开(公告)日：2008-03-18
申请号：US11371597
申请日：2006-03-09
申请人： Stephen J. Fedigan
发明人： Stephen J. Fedigan
IPC分类号： H03M7/00
CPC分类号： H03H17/0628 , H03H17/028
摘要： Asynchronous sampling rate converter with input/output frequency ratio estimation and polyphase filtering uses FIFO level feedback to adaptively control frequency ratio estimation.
摘要翻译：具有输入/输出频率比估计和多相滤波的异步采样率转换器使用FIFO电平反馈来自适应地控制频率比估计。

9. 发明授权

US07196640B2 Relaxation oscillator based keypad decoder 有权
标题翻译：基于松弛振荡器的键盘解码器
公开(公告)号：US07196640B2
公开(公告)日：2007-03-27
申请号：US11386961
申请日：2006-03-22
申请人： Stephen J. Fedigan
发明人： Stephen J. Fedigan
IPC分类号： H03M11/00
CPC分类号： H03M11/24
摘要： The keypad interface element of this invention uses a relaxation oscillator and a digital keypad processor having a counter/timer to decode specific keys. The RC portion of the relaxation oscillator includes a resistance ladder and a set of momentary on pushbutton switches disposed change resistance dependent upon which key is pressed. This causes the relaxation oscillator to produce an output signal having a corresponding frequency. The counter/timer of the digital keypad processor produces a count corresponding to the oscillator frequency. The digital keypad processor latches and holds a binary number specifically identifying the depressed key. A state machine in the digital keypad processor provides transient-free, noise immune keypad decoding.
摘要翻译：本发明的键盘接口元件使用张弛振荡器和具有计数器/定时器的数字小键盘处理器来解码特定键。张弛振荡器的RC部分包括电阻梯和一组瞬时按钮开关，根据按下哪个键设置变化电阻。这使得张弛振荡器产生具有相应频率的输出信号。数字键盘处理器的计数器/定时器产生对应于振荡器频率的计数。数字键盘处理器锁存并保存特定识别按下的键的二进制数。数字键盘处理器中的状态机提供无瞬态，噪声免疫键盘解码。

10. 发明授权

US07064682B2 Relaxation oscillator based keypad decoder 有权
公开(公告)号：US07064682B2
公开(公告)日：2006-06-20
申请号：US10455672
申请日：2003-06-05
申请人： Stephen J. Fedigan
发明人： Stephen J. Fedigan
IPC分类号： H03M11/00
CPC分类号： H03M11/24
摘要： The keypad interface element of this invention uses a relaxation oscillator and a digital keypad processor having a counter/timer to decode specific keys. The RC portion of the relaxation oscillator includes a resistance ladder and a set of momentary on pushbutton switches disposed change resistance dependent upon which key is pressed. This causes the relaxation oscillator to produce an output signal having a corresponding frequency. The counter/timer of the digital keypad processor produces a count corresponding to the oscillator frequency. The digital keypad processor latches and holds a binary number specifically identifying the depressed key. A state machine in the digital keypad processor provides transient-free, noise immune keypad decoding.

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