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1. 发明申请

US20070152750A1 Digital PWM amplifier with simulation-based feedback 有权
标题翻译：数字PWM放大器，具有基于仿真的反馈
公开(公告)号：US20070152750A1
公开(公告)日：2007-07-05
申请号：US11324132
申请日：2005-12-30
申请人： Jack Andersen , Peter Craven , Michael Kost , Daniel Chieng , Larry Hand , Wilson Taylor
发明人： Jack Andersen , Peter Craven , Michael Kost , Daniel Chieng , Larry Hand , Wilson Taylor
IPC分类号： H03G3/20
CPC分类号： H03F3/217 , H03F1/32 , H03F2200/331
摘要： Systems and methods for performance improvements in digital switching amplifiers using simulation-based feedback. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a simulator configured to model processing of audio signals by the plant. The outputs of the plant and the simulator are provided to a subtractor, the output of which is then added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal for input to the subtractor. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.
摘要翻译：使用基于仿真的反馈数字开关放大器性能改进的系统和方法。在一个实施例中，数字脉宽调制（PWM）放大器包括被配置为接收和处理输入音频信号的信号处理设备。该放大器还包括一个模拟器，被配置为模拟工厂对音频信号的处理。工厂和模拟器的输出被提供给减法器，然后将其输出作为反馈加到输入音频信号上。该设备可以由调制器和电源开关，噪声整形器或任何其它类型的设备组成。可以提供模数转换器（ADC）以将输出音频信号转换为数字信号以输入到减法器。可以在ADC之前或之后实现滤波，如果ADC是过采样ADC，则可以在ADC之后放置抽取器。

2. 发明授权

US4118790A Data processing equipment 失效
标题翻译：数据处理设备
公开(公告)号：US4118790A
公开(公告)日：1978-10-03
申请号：US773264
申请日：1977-03-01
申请人： Stewart Graham Cockett , Jeffrey Philip Taylor , Peter Craven , Alan Charles Farmer
发明人： Stewart Graham Cockett , Jeffrey Philip Taylor , Peter Craven , Alan Charles Farmer
IPC分类号： H04M15/00 , H04M15/04 , G06F7/02
CPC分类号： H04M15/04
摘要： Data processing equipment suitable for recording details of manually connected telephone calls has a plurality of operator stations with keyboards and VDU's connected in groups to operator's control units which respond to keyed instructions to obtain data from peripheral units storing such data and for recording on magnetic tape cartridge the details of the calls. The magnetic tape cartridge recording units are duplicated and the data to be recorded in the two units, which are separately generated and should be the same, are compared with one another and their validity checked. If both data are valid, whether they differ or not, they are recorded. If only one set of data is valid only the valid data are recorded by both recorders. A marker signal may be recorded to indicate that the data recorded may be incorrect.
摘要翻译：适用于记录手动连接的电话呼叫的细节的数据处理设备具有多个操作员站，其中键盘和VDU分组连接到操作者的控制单元上，操作人员的控制单元响应于键控指令，从存储此类数据的外围单元获取数据，并在磁带盒电话的细节。磁带盒记录单元被复制，并且要分别生成并应相同的两个单元中要记录的数据彼此进行比较并检查其有效性。如果两个数据都是有效的，它们是否有差异，则会被记录下来。如果只有一组数据有效，则两个记录器都记录有效数据。可以记录标记信号以指示记录的数据可能不正确。

3. 发明授权

US07576606B2 Digital PWM amplifier having a low delay corrector 有权
标题翻译：数字PWM放大器具有低延迟校正器
公开(公告)号：US07576606B2
公开(公告)日：2009-08-18
申请号：US11782708
申请日：2007-07-25
申请人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L. W. Chieng , Larry E. Hand , Wilson E. Taylor
发明人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L. W. Chieng , Larry E. Hand , Wilson E. Taylor
IPC分类号： H03F3/38
CPC分类号： H03F3/217
摘要： Systems and methods for performance improvements in digital switching amplifiers using a low delay corrector. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a low delay corrector configured to receive signals output by the plant. The output of the low delay corrector is added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.
摘要翻译：使用低延迟校正器的数字开关放大器性能改进的系统和方法。在一个实施例中，数字脉宽调制（PWM）放大器包括被配置为接收和处理输入音频信号的信号处理设备。放大器还包括低延迟校正器，其被配置为接收由工厂输出的信号。低延迟校正器的输出作为反馈被添加到输入音频信号。该设备可以由调制器和电源开关，噪声整形器或任何其它类型的设备组成。可以提供模数转换器（ADC）以将输出音频信号转换为数字信号。可以在ADC之前或之后实现滤波，如果ADC是过采样ADC，则可以在ADC之后放置抽取器。

4. 发明申请

US20090027117A1 Low-Noise, Low-Distortion Digital PWM Amplifier 有权
标题翻译：低噪声，低失真数字PWM放大器
公开(公告)号：US20090027117A1
公开(公告)日：2009-01-29
申请号：US11782702
申请日：2007-07-25
申请人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L.W. Chieng , Larry E. Hand , Wilson E. Taylor
发明人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L.W. Chieng , Larry E. Hand , Wilson E. Taylor
IPC分类号： H03F3/38
CPC分类号： H03F1/3258 , H03F1/26 , H03F1/3241 , H03F3/217
摘要： Systems and methods for performance improvements in digital switching amplifiers using low-pass filtering to reduce noise and distortion. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a low-pass filter configured to filter audio signals output by the plant. The filtered output of the plant is added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.
摘要翻译：使用低通滤波技术降低噪声和失真的数字开关放大器性能改进的系统和方法。在一个实施例中，数字脉宽调制（PWM）放大器包括被配置为接收和处理输入音频信号的信号处理设备。放大器还包括一个低通滤波器，用于滤除工厂输出的音频信号。工厂的滤波输出作为反馈被添加到输入音频信号。该设备可以由调制器和电源开关，噪声整形器或任何其它类型的设备组成。可以提供模数转换器（ADC）以将输出音频信号转换为数字信号。可以在ADC之前或之后实现滤波，如果ADC是过采样ADC，则可以在ADC之后放置抽取器。

5. 发明授权

US07286009B2 Digital PWM amplifier with simulation-based feedback 有权
公开(公告)号：US07286009B2
公开(公告)日：2007-10-23
申请号：US11324132
申请日：2005-12-30
申请人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L. W. Chieng , Larry E. Hand , Wilson E. Taylor
发明人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L. W. Chieng , Larry E. Hand , Wilson E. Taylor
IPC分类号： H03F3/68
CPC分类号： H03F3/217 , H03F1/32 , H03F2200/331
摘要： Systems and methods for performance improvements in digital switching amplifiers using simulation-based feedback. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a simulator configured to model processing of audio signals by the plant. The outputs of the plant and the simulator are provided to a subtractor, the output of which is then added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal for input to the subtractor. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.

6. 发明申请

US20070156262A1 Enhanced feedback for plant control 失效
标题翻译：增强工厂控制反馈
公开(公告)号：US20070156262A1
公开(公告)日：2007-07-05
申请号：US11323929
申请日：2005-12-30
申请人： Peter Craven
发明人： Peter Craven
IPC分类号： G05B21/02
CPC分类号： G05B13/048 , G05B13/042 , G05B17/02
摘要： A method and system for controlling the behaviour of a plant having an input and an output by enhanced feedback. A simulation input signal is derived from an input to be applied to the plant and a simulated signal is generated by simulating an aspect of an assumed behaviour of the plant in dependence on the simulation input signal. The simulated signal is subtracted from a plant feedback signal which is derived from an output of the plant and the resulting difference signal is used to modify the input signal by feedback prior to deriving a plant input signal. The simulation may take into account derivation of the plant feedback signal and the input signal is typically modified so as to reduce the effect on the output signal of a deviation in actual behaviour of the plant from the assumed behaviour of the plant over a predetermined operating frequency range.
摘要翻译：一种用于通过增强的反馈来控制具有输入和输出的设备的行为的方法和系统。模拟输入信号从要施加到工厂的输入端导出，并且通过根据模拟输入信号模拟工厂的假设行为的一个方面来产生模拟信号。从植物输出得到的植物反馈信号中减去模拟信号，所得差值信号用于在产生植物输入信号之前通过反馈修改输入信号。模拟可以考虑植物反馈信号的导出，并且通常修改输入信号，以便减少对植物的实际行为偏离输出信号对植物在预定操作频率上的假设行为的影响范围。

7. 发明申请

US20090027118A1 Digital PWM Amplifier Having a Low Delay Corrector 有权
标题翻译：具有低延迟校正器的数字PWM放大器
公开(公告)号：US20090027118A1
公开(公告)日：2009-01-29
申请号：US11782708
申请日：2007-07-25
申请人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L.W. Chieng , Larry E. Hand , Wilson E. Taylor
发明人： Jack B. Andersen , Peter Craven , Michael A. Kost , Daniel L.W. Chieng , Larry E. Hand , Wilson E. Taylor
IPC分类号： H03F3/38 , H03G3/10
CPC分类号： H03F3/217
摘要： Systems and methods for performance improvements in digital switching amplifiers using a low delay corrector. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a low delay corrector configured to receive signals output by the plant. The output of the low delay corrector is added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.
摘要翻译：使用低延迟校正器的数字开关放大器性能改进的系统和方法。在一个实施例中，数字脉宽调制（PWM）放大器包括被配置为接收和处理输入音频信号的信号处理设备。放大器还包括低延迟校正器，其被配置为接收由工厂输出的信号。低延迟校正器的输出作为反馈被添加到输入音频信号。该设备可以由调制器和电源开关，噪声整形器或任何其它类型的设备组成。可以提供模数转换器（ADC）以将输出音频信号转换为数字信号。可以在ADC之前或之后实现滤波，如果ADC是过采样ADC，则可以在ADC之后放置抽取器。

8. 发明申请

US20050030207A1 LOSSLESS CODING METHOD FOR WAVEFORM DATA 失效
标题翻译：用于波形数据的无噪声编码方法
公开(公告)号：US20050030207A1
公开(公告)日：2005-02-10
申请号：US10930661
申请日：2004-08-30
申请人： Peter Craven , Michael Gerzon , Peter Gerzon
发明人： Peter Craven , Michael Gerzon , Peter Gerzon
IPC分类号： H03M7/30 , H03M7/38 , H04B14/06 , H03M7/00
CPC分类号： H03M7/3046
摘要： In a method of lossless processing of an integer value signal in a prediction filter which includes a quantiser, a numerator of the prediction filter is implemented prior to the quantiser and a denominator of the prediction filter is implemented recursively around the quantiser to reduce the peak data rate of an output signal. In the lossless processor, at each sample instant, an input to the quantiser is jointly responsive to a first sample value of a signal input to the prediction filter, a second sample value of a signal input to the prediction filter at a previous sample instant, and an output value of the quantiser at a previous sample incident. In a preferred embodiment, the prediction filter includes noise shaping for affecting the output of the quantiser.
摘要翻译：在包括量化器的预测滤波器中对整数值信号进行无损处理的方法中，在量化器之前实现预测滤波器的分子，并且在量化器周围递归地实现预测滤波器的分母以减少峰值数据输出信号的速率。在无损处理器中，在每个采样时刻，对量化器的输入共同响应输入到预测滤波器的信号的第一采样值，在先前采样时刻输入到预测滤波器的信号的第二采样值，以及在之前的采样事件处的量化器的输出值。在优选实施例中，预测滤波器包括用于影响量化器的输出的噪声整形。

9. 发明申请

US20050007262A1 Matrix improvements to lossless encoding and decoding 有权
标题翻译：矩阵改进无损编码和解码
公开(公告)号：US20050007262A1
公开(公告)日：2005-01-13
申请号：US10913160
申请日：2004-08-05
申请人： Peter Craven , Malcolm Law , John Stuart
发明人： Peter Craven , Malcolm Law , John Stuart
IPC分类号： G10L19/00 , G11B20/00 , G11B20/10 , H03M7/30 , H04H20/88 , H04N5/76 , H04S3/02 , H03M7/00
CPC分类号： H04H20/88 , G11B20/00007 , G11B20/00992 , G11B20/10527 , G11B2020/00014 , G11B2020/10546 , G11B2220/2562 , H03M7/30 , H04N5/76 , H04S3/02 , H04S2420/03
摘要： A lossless encoder and decoder are provided for transmitting a multichannel signal on a medium such as DVD-Audio. The encoder accepts additionally a downmix specification and splits the encoded stream into two substreams, such that a two-channel decoder of meagre computational power can implement the downmix specification by decoding one substream, while a multichannel decoder can decode the original multichannel signal losslessly using both substreams. Further features provide for efficient implementation on 24-bit processors, for confirmation of lossless reproduction to the user, and for benign behaviour in the case of downmix specifications that result in overload. The principle is also extended to mixed-rate signals, where for example some input channels are sampled at 48 kHz and some are sampled at 96 kHz
摘要翻译：提供了一种无损编码器和解码器，用于在诸如DVD-Audio的介质上发送多声道信号。编码器另外接收一个下混指定，并将编码流分解成两个子流，使得计算能力较弱的双通道解码器可以通过解码一个子流来实现下混规范，而多通道解码器可以无损地使用两个子码解码原始多通道信号子流其他功能提供了24位处理器上的高效实现，用于确认用户的无损复制，以及在导致过载的降混规范的情况下的良性行为。该原理还扩展到混合速率信号，其中例如一些输入通道以48kHz采样，一些输入通道以96kHz采样

10. 发明授权

US07756592B2 Enhanced feedback for plant control 失效
标题翻译：增强工厂控制反馈
公开(公告)号：US07756592B2
公开(公告)日：2010-07-13
申请号：US11323929
申请日：2005-12-30
申请人： Peter Craven
发明人： Peter Craven
IPC分类号： G05B13/02
CPC分类号： G05B13/048 , G05B13/042 , G05B17/02
摘要： A method and system for controlling the behavior of a plant having an input and an output by enhanced feedback. A simulation input signal is derived from an input to be applied to the plant and a simulated signal is generated by simulating an aspect of an assumed behavior of the plant in dependence on the simulation input signal. The simulated signal is subtracted from a plant feedback signal which is derived from an output of the plant and the resulting difference signal is used to modify the input signal by feedback prior to deriving a plant input signal. The simulation may take into account derivation of the plant feedback signal and the input signal is typically modified so as to reduce the effect on the output signal of a deviation in actual behavior of the plant from the assumed behavior of the plant over a predetermined operating frequency range.
摘要翻译：一种用于通过增强的反馈来控制具有输入和输出的设备的行为的方法和系统。模拟输入信号从要施加到工厂的输入端导出，并且通过根据模拟输入信号模拟工厂的假设行为的一个方面来产生模拟信号。从植物输出得到的植物反馈信号中减去模拟信号，所得差值信号用于在产生植物输入信号之前通过反馈修改输入信号。模拟可以考虑植物反馈信号的导出，并且通常修改输入信号，以便减少对植物的实际行为偏离输出信号对植物在预定操作频率上的假设行为的影响范围。

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