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1. 发明申请

WO2009029917A1 SYSTEMS AND METHODS FOR COMMUNICATION BETWEEN A PC APPLICATION AND THE DSP IN AN HDA AUDIO CODEC 审中-公开
标题翻译： PC应用与HDA音频编解码器之间的通信的系统和方法
公开(公告)号：WO2009029917A1
公开(公告)日：2009-03-05
申请号：PCT/US2008/074964
申请日：2008-09-01
申请人： D2AUDIO CORPORATION , CHIENG, Daniel L. , GEPHARDT, Douglas D. , HAND, Larry E. , KLAAS, Jeffrey M. , ZAHARIAS, Adam
发明人： CHIENG, Daniel L. , GEPHARDT, Douglas D. , HAND, Larry E. , KLAAS, Jeffrey M. , ZAHARIAS, Adam
IPC分类号： G06F3/16
CPC分类号： G06F3/162
摘要： Systems and methods implemented in a PC for enabling communication between an application executing on the CPU and a DSP that is incorporated into a codec in the High Definition Audio (HDA) system, wherein the communication is carried out via the HDA bus. In one embodiment, an HDA codec includes one or more conventional HDA widgets coupled to a programmable processor such as a DSP. The codec includes a set of registers that are configured to store HDA verbs and data transmitted via the HDA bus. The programmable processor is configured to identify verbs that indicate associated information is a communication from an application executing on the CPU, read the associated information, and process the information according to the associated verbs. The information may be program instructions, parametric data, requests for information, etc.
摘要翻译：在PC中实现的用于实现在CPU上执行的应用程序与被并入高清晰度音频（HDA）系统中的编解码器的DSP之间的通信的系统和方法，其中通过HDA总线进行通信。在一个实施例中，HDA编解码器包括耦合到诸如DSP的可编程处理器的一个或多个常规HDA小部件。编解码器包括一组寄存器，用于存储通过HDA总线传输的HDA动词和数据。可编程处理器被配置为识别指示相关信息的动词是来自在CPU上执行的应用程序的通信，读取相关联的信息，以及根据相关联的动词处理信息。该信息可以是程序指令，参数数据，信息请求等。

2. 发明申请

WO2004086614A1 MULTI-CHIP PWM SYNCHRONIZATION AND COMMUNICATION 审中-公开
标题翻译：多芯片PWM同步和通信
公开(公告)号：WO2004086614A1
公开(公告)日：2004-10-07
申请号：PCT/US2004/008545
申请日：2004-03-19
申请人： D2AUDIO CORPORATION , ANDERSEN, Jack, B. , CHIENG, Daniel, L., W. , KOST, Michael, A. , LARSON, Jan, A.
发明人： ANDERSEN, Jack, B. , CHIENG, Daniel, L., W. , KOST, Michael, A. , LARSON, Jan, A.
IPC分类号： H03F3/68
CPC分类号： H04L7/02 , H03F1/26 , H03F1/523 , H03F3/2171 , H03F3/2175 , H03F3/68 , H03F2200/331 , H03G7/007 , H04L7/005
摘要： Systems and methods for synchronizing multiple digital audio controller chips, wherein one of the chips is designated as a master (210) and the other chips are designated as slaves (220). A common line (23a) connects all of the chips and is used to transmit synchronization signals from the master (210) to the slaves (220). Each of the chips listens for an appropriate signal and, when the signal is detected, all of the chips simultaneously begin operation. In one embodiment, the synchronization signal comprises a transition on the shared line to an active state. The transition is repeated at fixed intervals and maintained in the active state for a fixed period in order to enable the chips to determine whether synchronization is being maintained. The signal may be sampled and/or filtered to improve reliability. The chips may be able to drive the shared line active to indicate that synchronization has been lost.
摘要翻译：用于同步多个数字音频控制器芯片的系统和方法，其中芯片中的一个被指定为主机（210），并且其他芯片被指定为从机（220）。公共线（23a）连接所有芯片，并且用于将来自主机（210）的同步信号发送到从机（220）。每个芯片侦听适当的信号，并且当检测到信号时，所有芯片同时开始运行。在一个实施例中，同步信号包括在共享线路上的转换到活动状态。以固定的间隔重复该转换，并将其保持在活动状态一段固定的时间段，以便芯片确定是否保持同步。信号可以被采样和/或滤波以提高可靠性。芯片可能能够驱动共享线路活动以指示同步已丢失。

3. 发明申请

WO2007087586A3 SYSTEMS AND METHODS FOR OVER-CURRENT PROTECTION 审中-公开
公开(公告)号：WO2007087586A3
公开(公告)日：2007-08-02
申请号：PCT/US2007/061015
申请日：2007-01-25
申请人： D2AUDIO CORPORATION , CHIENG, Daniel, L.W. , KOST, Michael, A. , ANDERSEN, Jack, B. , HAND, Larry, E. , TAYLOR, Wilson, E.
发明人： CHIENG, Daniel, L.W. , KOST, Michael, A. , ANDERSEN, Jack, B. , HAND, Larry, E. , TAYLOR, Wilson, E.
IPC分类号： H03F3/38
摘要： Systems and methods for over-current protection in all-digital amplifiers using low-cost current sensing mechanisms. An over-current hard clipping unit receives a digital audio signal, clips the signal according to a clip level, and provides the signal to a modulator. The modulator modulates the signal to produce, e.g., a PWM signal and provides the modulated signal to an output stage which generates an output current to drive a speaker. An over-current sensing unit is compares the output current to a threshold value and generates a binary signal indicating whether the output current exceeds the threshold value. The hard clipping unit receives the binary signal and ramps down the clip level during time periods in which the binary signal indicates that the output current exceeds the threshold. When the binary signal indicates that the output current does not exceed the threshold value, the hard clipping unit ramps up the clip level.

4. 发明申请

WO2007079396A2 DIGITAL PWM AMPLIFIER WITH SIMULATION-BASED FEEDBACK 审中-公开
标题翻译：数字PWM放大器与模拟反馈
公开(公告)号：WO2007079396A2
公开(公告)日：2007-07-12
申请号：PCT/US2006/062687
申请日：2006-12-28
申请人： D2AUDIO CORPORATION , ANDERSEN, Jack, B. , CRAVEN, Peter , KOST, Michael, A. , CHIENG, Daniel, L. W. , HAND, Larry, E. , TAYLOR, Wilson, E.
发明人： ANDERSEN, Jack, B. , CRAVEN, Peter , KOST, Michael, A. , CHIENG, Daniel, L. W. , HAND, Larry, E. , TAYLOR, Wilson, E.
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 (AOC) may be provided to convert the output audio signal to a digital signal for input to the subtracter. 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（AOC）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。

5. 发明申请

WO2004086616A3 CLIP DETECTION IN PWM AMPLIFIER 审中-公开
公开(公告)号：WO2004086616A3
公开(公告)日：2004-10-07
申请号：PCT/US2004/008534
申请日：2004-03-19
申请人： D2AUDIO CORPORATION , ANDERSEN, Jack, B. , HAND, Larry, E. , TAYLOR, Wilson, E.
发明人： ANDERSEN, Jack, B. , HAND, Larry, E. , TAYLOR, Wilson, E.
IPC分类号： H03M3/00
摘要： Systems and methods for detecting clipping conditions in an audio signal and processing the signal to reduce the clipping conditions. In one embodiment, a system comprises a noise shaper, a modulator, an output stage and other components. A detector detects clipping in the noise shaper and a signal processor processes the audio signal input to the noise shaper based on feedback received from the detector. The signal processor may function to modify the input audio signal in different ways in response to different conditions that are detected by the detector. A filter may be included to filter tie output of the detector before being provided to the signal processor. A flag circuit may be coupled between the filter and the signal processor to assert an output signal until the signal processor resets the flag circuit.

6. 发明申请

WO2009029920A1 SYSTEMS AND METHODS FOR CONTROLLING HDA SYSTEM CAPABILITIES 审中-公开
标题翻译：用于控制HDA系统能力的系统和方法
公开(公告)号：WO2009029920A1
公开(公告)日：2009-03-05
申请号：PCT/US2008/074967
申请日：2008-09-01
申请人： D2AUDIO CORPORATION , TAYLOR, Wilson E. , GEPHARDT, Douglas D. , HAND, Larry E. , SPINA, Richard
发明人： TAYLOR, Wilson E. , GEPHARDT, Douglas D. , HAND, Larry E. , SPINA, Richard
IPC分类号： G06F3/16
CPC分类号： G06F3/162 , G06F21/84
摘要： Systems and methods for controlling the capabilities of an High Definition Audio (HDA) system, wherein the system determines whether an optional component such as a plug-in card is connected to the system and then configures itself in a baseline configuration if the optional component is not connected or configures itself in a different, alternative configuration if the optional component is connected. In one embodiment, a codec of the system includes a programmable processor configured to read configuration authorization information and also read configuration information from the optional component if it is connected to the system. The processor also controls the configuration of the HDA system and the operation of the codec based on the authorization and configuration information. The system can thereby provide different features and functionality using the same hardware.
摘要翻译：用于控制高清晰度音频（HDA）系统的能力的系统和方法，其中系统确定诸如插件卡的可选组件是否连接到系统，然后如果可选组件是如果可选组件连接，则不连接或将其自身配置为不同的替代配置。在一个实施例中，系统的编解码器包括可编程处理器，其被配置为读取配置授权信息，并且如果连接到系统，则从可选组件读取配置信息。处理器还根据授权和配置信息控制HDA系统的配置和编解码器的操作。因此，该系统可以使用相同的硬件来提供不同的特征和功能。

7. 发明申请

WO2007112156A2 PWM FEEDBACK/FEED-FORWARD PROTECTION 审中-公开
标题翻译： PWM反馈/前馈保护
公开(公告)号：WO2007112156A2
公开(公告)日：2007-10-04
申请号：PCT/US2007/061769
申请日：2007-02-07
申请人： D2AUDIO CORPORATION , CHIENG, Daniel, L.w. , KOST, Michael, A. , CRAVEN, Peter, G. , ANDERSEN, Jack, B.
发明人： CHIENG, Daniel, L.w. , KOST, Michael, A. , CRAVEN, Peter, G. , ANDERSEN, Jack, B.
IPC分类号： H03K9/08
CPC分类号： H03F3/2171 , H03F1/32 , H03F1/52 , H03F1/523 , H03F3/2175 , H03F2200/03 , H03F2200/153 , H03F2200/351
摘要： Systems and methods for improving the stability of feedback and/or feed-forward subsystems in digital amplifiers. One embodiment comprises a digital pulse width modulation (PWM) controller. The controller includes an input for receiving a digital audio input signal and is configured to generate a PWM output signal based on the input signal at an output. The controller also has control inputs for receiving external audio correction signals such as feedback and power supply feed-forward signals. The controller has correction circuitry for processing the received external control signals and modifying the input signal based on these signals. Fault detectors monitor fault conditions at various locations within the correction circuitry, and a protection control unit receives fault signals from the fault detectors and modifies operation of the controller in response to the fault signals.
摘要翻译：用于提高数字放大器中反馈和/或前馈子系统稳定性的系统和方法。一个实施例包括数字脉宽调制（PWM）控制器。控制器包括用于接收数字音频输入信号的输入端，并且被配置为基于输出端的输入信号产生PWM输出信号。控制器还具有用于接收外部音频校正信号（如反馈和电源前馈信号）的控制输入。该控制器具有校正电路，用于处理所接收的外部控制信号，并根据这些信号修改输入信号。故障检测器监视校正电路内的各个位置的故障状况，保护控制单元从故障检测器接收故障信号，并根据故障信号修改控制器的操作。

8. 发明申请

WO2007090164A2 SYSTEMS AND METHODS FOR PULSE WIDTH MODULATING ASYMMETRIC SIGNAL LEVELS 审中-公开
标题翻译：脉冲宽度调制不对称信号电平的系统和方法
公开(公告)号：WO2007090164A2
公开(公告)日：2007-08-09
申请号：PCT/US2007/061399
申请日：2007-01-31
申请人： D2AUDIO CORPORATION , KOST, Michael, A. , ANDERSEN, Jack, B.
发明人： KOST, Michael, A. , ANDERSEN, Jack, B.
IPC分类号： H03K3/017
CPC分类号： H03K7/08 , H03F3/2173 , H03F2200/03 , H03F2200/351
摘要： Systems and methods for pulse width modulating waveforms to represent asymmetric signal levels using pulses that are symmetric within their respective switching periods. One embodiment comprises a pulse width modulation system including an asymmetric correction unit and a pair of modulators. The asymmetric correction unit receives samples of an input signal and produces two separate output signals for corresponding modulators. For each sample, the asymmetric correction unit determines whether the signal level of the sample is symmetric or asymmetric. If the signal level of the sample is symmetric, the sample is forwarded to each of the modulators. If the signal level is asymmetric, the asymmetric correction unit increases one modified sample to the next higher symmetric signal level and decreases another modified sample to the next lower symmetric signal level and forwards the modified samples to the modulators.
摘要翻译：用于脉冲宽度调制波形的系统和方法，以使用在其各自的切换周期内对称的脉冲来表示不对称信号电平。一个实施例包括包括非对称校正单元和一对调制器的脉宽调制系统。不对称校正单元接收输入信号的采样，并为相应的调制器产生两个分离的输出信号。对于每个样本，不对称校正单元确定样本的信号电平是对称还是不对称。如果样品的信号电平是对称的，则将样品转发到每个调制器。如果信号电平不对称，则不对称校正单元将一个修改的采样增加到下一个较高的对称信号电平，并将另一个修改的采样降低到下一个较低对称信号电平，并将修改的采样转发到调制器。

9. 发明申请

WO2004086609A1 SYSTEMS AND METHODS FOR PROTECTION OF AUDIO AMPLIFIER CIRCUITS 审中-公开
标题翻译：用于保护音频放大器电路的系统和方法
公开(公告)号：WO2004086609A1
公开(公告)日：2004-10-07
申请号：PCT/US2004/008546
申请日：2004-03-19
申请人： D2AUDIO CORPORATION , KOST, Michael, A. , ANDERSEN, Jack, B.
发明人： KOST, Michael, A. , ANDERSEN, Jack, B.
IPC分类号： H03F1/52
CPC分类号： H04L7/02 , H03F1/523 , H03F3/2171 , H03F3/2175 , H03F2200/331 , H03F2200/342 , H03F2200/351 , H03G7/007 , H04L7/005
摘要： Systems and methods for providing protection from failure events in a digital audio amplification system. One embodiment of the invention comprises a system having a digital amplifier controller, an amplifier output stage (160) coupled to the controller and configured to receive audio signals from the controller, one or more sensors (180) coupled to the output stage (160) and one or more low-pass filters coupled to receive sensor signals from the one or more sensors, (180). The low-pass filter is configured to filter the sensor signals and to provide the filtered sensor signals to the controller, which provides a programmable response to the filtered sensor signals. The response may range from not taking any action, to limiting the amplification of audio signals, to shutting down the system.
摘要翻译：用于提供数字音频放大系统中的故障事件保护的系统和方法。本发明的一个实施例包括具有数字放大器控制器的系统，耦合到控制器并被配置为从控制器接收音频信号的放大器输出级（160），耦合到输出级（160）的一个或多个传感器（180）以及耦合以从所述一个或多个传感器接收传感器信号的一个或多个低通滤波器（180）。低通滤波器被配置为对传感器信号进行滤波，并将滤波后的传感器信号提供给控制器，该控制器为滤波后的传感器信号提供可编程响应。响应可能不在于采取任何行动，限制音频信号的放大，关闭系统。

10. 发明申请

WO2009029919A1 SYSTEMS AND METHODS FOR SHADOWING AN HDA CODEC 审中-公开
标题翻译：划分HDA编解码器的系统和方法
公开(公告)号：WO2009029919A1
公开(公告)日：2009-03-05
申请号：PCT/US2008/074966
申请日：2008-09-01
申请人： D2AUDIO CORPORATION , CHIENG, Daniel, L. , GEPHARDT, Douglas, D. , KLAAS, Jeffrey, M. , ZAHARIAS, Adam
发明人： CHIENG, Daniel, L. , GEPHARDT, Douglas, D. , KLAAS, Jeffrey, M. , ZAHARIAS, Adam
IPC分类号： G06F3/16
CPC分类号： G06F3/162
摘要： Systems and methods for "shadowing" a target codec to provide additional features that are not available in the target codec. In one embodiment, an audio amplification system includes a High Definition Audio (HDA) bus, and an HDA controller, a conventional HDA codec and a shadow HDA codec coupled to the HDA bus. The conventional codec receives audio data and commands from the HDA controller via the bus and processes them to generate an output audio signal. The shadow codec snoops the audio data and commands on the HDA bus that are targeted to the conventional codec. The shadow codec processes the snooped audio data and commands to generate a second audio output. The shadow codec does not communicate with the HDA controller and is transparent to the controller. The shadow codec does not request enumeration from the HDA controller and does not receive an address from the HDA controller.
摘要翻译：用于“遮蔽”目标编解码器以提供目标编解码器中不可用的附加功能的系统和方法。在一个实施例中，音频放大系统包括高清晰度音频（HDA）总线和HDA控制器，传统的HDA编解码器和耦合到HDA总线的影子HDA编解码器。常规编解码器经由总线接收来自HDA控制器的音频数据和命令，并处理它们以产生输出音频信号。影像编解码器会窥探HDA总线上的传统编解码器的音频数据和命令。影子编解码器处理窥探的音频数据和命令以产生第二个音频输出。影子编解码器不与HDA控制器通信，对控制器是透明的。影子编解码器不要求来自HDA控制器的枚举，也不会从HDA控制器接收地址。

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