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1.发明申请Method and system for mitigating background noise for a Sigma-Delta digital-to-analog converter 有权用于减轻Sigma-Delta数模转换器背景噪声的方法和系统公开(公告)号：US20070046517A1
公开(公告)日：2007-03-01
申请号：US11216292
申请日：2005-08-31
IPC分类号： H03M3/00
CPC分类号： H03M7/3008
摘要： A sigma delta digital-to-analog (D/A) converter system (10) includes a summing device (35) at an input of a D/A converter (30), and a low frequency low amplitude wave signal (31) injected at an input of the summing device that remains unfiltered and is used to suppress spurious tone artifacts. The D/A converter system can further include an amplitude control and a frequency control for selectively adjusting the frequency and the amplitude of the low frequency low amplitude wave signal being injected. Note, the low frequency low amplitude repeating wave signal generator can take the form of a digital signal processor (DSP) (37) having the appropriate software to generate such signals.
摘要翻译： Σ-Δ数模（D / A）转换器系统（10）包括在D / A转换器（30）的输入处的加法装置（35）和注入的低频低振幅信号（31） 在相加装置的输入端保持未滤波，并用于抑制杂散音伪像。 D / A转换器系统还可以包括用于选择性地调节被注入的低频低振幅信号的频率和振幅的振幅控制和频率控制。 注意，低频低振幅中继波信号发生器可以采用具有适当软件的数字信号处理器（DSP）（37）的形式来产生这样的信号。
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公开(公告)号：US20050100179A1
公开(公告)日：2005-05-12
申请号：US10702714
申请日：2003-11-06
申请人： Ali Behboodian , Audley Patterson
发明人： Ali Behboodian , Audley Patterson
摘要： The invention concerns a method (300) and system (100) for controlling audio output. The method includes the steps of inputting (312) an audio signal and a voltage level signal, measuring (314) the audio signal and the voltage level signal, mapping (316) the audio signal against at least one table (134) of predetermined corresponding gain targets (138) and selecting (318) at least one gain target for the audio signal. The mapping step and the selecting step are based at least in part on the measurement of the voltage level signal and the measurement of the audio signal. The method also includes the step of applying (320) the gain target to the audio signal.
摘要翻译： 本发明涉及一种用于控制音频输出的方法（300）和系统（100）。 该方法包括以下步骤：输入（312）音频信号和电压电平信号，测量（314）音频信号和电压电平信号，将音频信号与预定对应的至少一个表格（134）映射（316） 增益目标（138）和选择（318）音频信号的至少一个增益目标。 映射步骤和选择步骤至少部分地基于电压电平信号的测量和音频信号的测量。 该方法还包括将增益目标应用于（320）音频信号的步骤。
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公开(公告)号：US20050278165A1
公开(公告)日：2005-12-15
申请号：US10400845
申请日：2003-03-27
申请人： Marc Boillot , Dennis Anson , Audley Patterson
发明人： Marc Boillot , Dennis Anson , Audley Patterson
摘要： A method, system and computer readable medium for increasing the audio perceptual loudness includes shifting at least one frequency of a first audio signal to create a second audio signal so as to increase the audio perceptual loudness. The power level of the second audio signal is not more than a power level of the first audio signal. The method also includes generating high-audio perceptual loudness tone alert sequences based on psychoacoustic and audiometric data. It further includes acquiring a listener's threshold audio profile; adding the listener's audio profile to the loudness sensitivity curve for producing the listener's tonal sensitivity curve; determining a required dB scaling for critical band tones from the listener's tonal sensitivity curve; normalizing the tonal sensitivity curve for creating a decibel curve; selecting a frequency range of the tones by using the tonal sensitivity curve; and spacing the sequence of tones along a critical band scale.
摘要翻译： 用于增加音频感知响度的方法，系统和计算机可读介质包括移动第一音频信号的至少一个频率以产生第二音频信号，以便增加音频感知响度。 第二音频信号的功率电平不大于第一音频信号的功率电平。 该方法还包括基于心理声学和听力数据产生高音频感知响度音警报序列。 它还包括获取听众的阈值音频配置文件; 将听众的音频配置文件添加到响度灵敏度曲线中，以产生听众的音调敏感度曲线; 从收听者的音调灵敏度曲线确定关键乐队音调所需的dB缩放; 归一化用于创建分贝曲线的色调敏感度曲线; 通过使用色调敏感度曲线选择色调的频率范围; 并沿着临界频带尺度间隔音调序列。
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4.发明申请公开(公告)号：US20050079885A1
公开(公告)日：2005-04-14
申请号：US10683596
申请日：2003-10-10
CPC分类号： H04W84/08 , H04L65/1016 , H04L65/4061 , H04M1/05 , H04M1/6066 , H04R5/04
摘要： A stereo headset (104) with push-to-talk function can be interfaced with a wireless communication device (102) via a connector interface. The connector interface preferably includes a jack at the wireless communication device (102) and a compatible plug at the stereo headset (104). An electrical contact (310) at the connector interface can contemporaneously interconnect both electrical audio signals between the wireless communication device (102) and at least one of the speakers of the stereo headset (104) and electrical user input signals from an external push-to-talk user input device (232) to the wireless communication device (102).
摘要翻译： 具有一键通功能的立体声耳机（104）可以经由连接器接口与无线通信设备（102）接口。 连接器接口优选地包括在无线通信设备（102）处的插座和立体声耳机（104）处的兼容插头。 连接器接口处的电触点（310）可以同时互连无线通信设备（102）和立体声头戴耳机（104）的至少一个扬声器之间的电音频信号和来自外部推送的电用户输入信号 - 向用户输入设备（232）发送到无线通信设备（102）。
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