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    • 2. 发明申请
    • SYSTEMS AND METHODS FOR CONTROLLING HDA SYSTEM CAPABILITIES
    • 用于控制HDA系统能力的系统和方法
    • WO2009029920A1
    • 2009-03-05
    • PCT/US2008/074967
    • 2008-09-01
    • D2AUDIO CORPORATIONTAYLOR, Wilson E.GEPHARDT, Douglas D.HAND, Larry E.SPINA, Richard
    • TAYLOR, Wilson E.GEPHARDT, Douglas D.HAND, Larry E.SPINA, Richard
    • G06F3/16
    • G06F3/162G06F21/84
    • 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.
    • 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。
    • 4. 发明申请
    • SYSTEMS AND METHODS FOR PULSE WIDTH MODULATING ASYMMETRIC SIGNAL LEVELS
    • 脉冲宽度调制不对称信号电平的系统和方法
    • WO2007090164A2
    • 2007-08-09
    • PCT/US2007/061399
    • 2007-01-31
    • D2AUDIO CORPORATIONKOST, Michael, A.ANDERSEN, Jack, B.
    • KOST, Michael, A.ANDERSEN, Jack, B.
    • H03K3/017
    • H03K7/08H03F3/2173H03F2200/03H03F2200/351
    • 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.
    • 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。