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1.发明授权公开(公告)号：US07221301B2
公开(公告)日：2007-05-22
申请号：US11216292
申请日：2005-08-31
IPC分类号： H03M1/00
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.
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公开(公告)号：US07110559B2
公开(公告)日：2006-09-19
申请号：US10702714
申请日：2003-11-06
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：US20060104460A1
公开(公告)日：2006-05-18
申请号：US10992584
申请日：2004-11-18
申请人： Ali Behboodian , Marc Boillot , Pratik Desai , Chin Wong
发明人： Ali Behboodian , Marc Boillot , Pratik Desai , Chin Wong
CPC分类号： G10L21/0208 , H04B1/1027
摘要： Systems, an apparatus, and methods are provided for mitigating noise associated with an audio signal. A system (100) for mitigating noise associated with an audio signal includes an estimator module (108). The estimator module determines an estimated level of noise associated with the audio signal. The system also includes an expander module (110). The expander module causes an attenuation of the audio signal if a level of the audio signal is below a signal threshold. The expander module is adaptively tunable so that the attenuation caused (606) by the expander module is based upon the level of noise estimated (602) by the estimator module.
摘要翻译： 提供了用于减轻与音频信号相关联的噪声的系统，装置和方法。 用于减轻与音频信号相关联的噪声的系统（100）包括估计器模块（108）。 估计器模块确定与音频信号相关联的估计噪声水平。 该系统还包括扩展器模块（110）。 如果音频信号的电平低于信号阈值，则扩展器模块导致音频信号的衰减。 扩展器模块是自适应可调的，使得由扩展器模块引起的（606）的衰减基于估计器模块估计的噪声水平（602）。
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公开(公告)号：US20060067512A1
公开(公告)日：2006-03-30
申请号：US10925399
申请日：2004-08-25
申请人： Marc Boillot , Ali Behboodian , Pratik Desai
发明人： Marc Boillot , Ali Behboodian , Pratik Desai
IPC分类号： H04M9/00
CPC分类号： H04M1/6033 , H04M1/72558 , H04M19/04
摘要： A telephone (310) and a method for providing outbound audio when the telephone is operating in a speakerphone mode. A first data unit (350) including a first unit type identifier (360) can be received by the telephone. The first unit type identifier can be an indicator of a type of audio data contained in the first data unit. For instance, the first unit type identifier can indicate whether the audio data is music or non-music audio data. If the first unit type identifier has a first value, for example a value indicating that the audio data is music data, unmuted outbound audio reproduced from the first data unit can be provided and voice activity detection can be disabled. Additionally, inbound audio can be muted.
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5.发明申请公开(公告)号：US20070129022A1
公开(公告)日：2007-06-07
申请号：US11292867
申请日：2005-12-02
IPC分类号： H04B1/38
CPC分类号： G10L25/69
摘要： A mobile communication device (100) includes a vocoder (104) for vocoding speech (500) received at the mobile communication device. The parameters output by the vocoder are used to generate a voicing quality metric (208). The voicing quality metric is used to provide feedback to the user of the mobile communication device by various feedback modalities including visual (114), audible (108), and tactile modalities (118) to indicate when the user should speak louder to overcome ambient noise. The voicing quality metric is also used by other communications equipment (304, 312) to decide if communication activity is needed.
摘要翻译： 移动通信设备（100）包括用于在移动通信设备处接收的用于声音语音（500）的声码器（104）。 由声码器输出的参数用于产生声音质量度量（208）。 发音质量度量用于通过包括视觉（114），可听（108）和触觉模式（118）的各种反馈模式向移动通信设备的用户提供反馈，以指示用户何时更大声地克服环境噪声 。 其他通信设备（304,312）还使用发声质量度量来决定是否需要通信活动。
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公开(公告)号：US20060025990A1
公开(公告)日：2006-02-02
申请号：US10900736
申请日：2004-07-28
申请人： Marc Boillot , Ali Behboodian , Pratik Desai
发明人： Marc Boillot , Ali Behboodian , Pratik Desai
IPC分类号： G10L11/04
CPC分类号： G10L19/09
摘要： The invention concerns a method (300) and system (100) for improving voice quality of a vocoder (138, 158). The method includes the steps of monitoring (312) a pitch of a voice signal (400) at a transmitting unit (110); when the pitch of the voice signal reaches a predetermined threshold (840), shifting (326) the pitch of the voice signal to at least a portion of a predetermined range (810); transmitting (338) the pitch-shifted voice signal to a receiving unit (112); and at the receiving unit, reshifting (342) the pitch-shifted voice signal to a level that compensates the step of shifting the pitch of the voice signal at the transmitting unit.
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7.发明申请公开(公告)号：US20050014535A1
公开(公告)日：2005-01-20
申请号：US10623427
申请日：2003-07-18
申请人： Pratik Desai , Ali Behboodian , Chin Wong
发明人： Pratik Desai , Ali Behboodian , Chin Wong
CPC分类号： H04M9/082
摘要： The invention provides a cellular telephone or other communications device with intelligence to manage speakerphone operation to more nearly approximate normal conversation, even when using a one-way only transmission mode. The microphone path and speaker path may be continuously monitored using dual voice activity detectors to assess the energy and other characteristics of each channel, and switch between one or the other depending on dynamic criteria. In noisy environments, a hangtime may be applied before permitting switching to avoid premature dropouts. Other criteria used to trigger the seizure of the channel may be adjusted, such as to eliminate a lower threshold below which the speaker path switches out automatically.
摘要翻译： 本发明提供了具有智能的蜂窝电话或其他通信设备，即使当仅使用单向传输模式时，也可以管理扬声器操作以更接近正常对话。 麦克风路径和扬声器路径可以使用双语音活动检测器来连续监测，以评估每个通道的能量和其他特性，并根据动态标准在一个或另一个之间切换。 在嘈杂的环境中，可以在允许切换之前应用挂起时间以避免过早的退出。 可以调整用于触发频道卡扣的其他标准，例如消除较低的阈值，低于该阈值扬声器路径自动切换。
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公开(公告)号：US07187767B2
公开(公告)日：2007-03-06
申请号：US10606477
申请日：2003-06-26
CPC分类号： H04M1/72519
摘要： A communication device (200) for dual mode muting operation includes a user interface (208) and a controller (202). The controller (202) is programmed to: in response to a first user input to the user interface (208), enable a first muting mode; and in response to a second user input to the user interface (208), disable the first muting mode and enable a second muting mode. The first muting mode may be one of a full muting and a concealed muting, while the second muting mode may be the other one of a full muting and a concealed muting.
摘要翻译： 用于双模式静音操作的通信设备（200）包括用户接口（208）和控制器（202）。 控制器（202）被编程为：响应于对用户接口（208）的第一用户输入，启用第一静音模式; 并且响应于第二用户输入到用户界面（208），禁用第一静音模式并启用第二静音模式。 第一静音模式可以是完全静音和隐藏的静音之一，而第二静音模式可以是完全静音和隐藏的静音中的另一种。
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公开(公告)号：US07123714B2
公开(公告)日：2006-10-17
申请号：US10925399
申请日：2004-08-25
申请人： Marc A. Boillot , Ali Behboodian , Pratik V. Desai
发明人： Marc A. Boillot , Ali Behboodian , Pratik V. Desai
IPC分类号： H04M1/00
CPC分类号： H04M1/6033 , H04M1/72558 , H04M19/04
摘要： A telephone (310) and a method for providing outbound audio when the telephone is operating in a speakerphone mode. A first data unit (350) including a first unit type identifier (360) can be received by the telephone. The first unit type identifier can be an indicator of a type of audio data contained in the first data unit. For instance, the first unit type identifier can indicate whether the audio data is music or non-music audio data. If the first unit type identifier has a first value, for example a value indicating that the audio data is music data, unmuted outbound audio reproduced from the first data unit can be provided and voice activity detection can be disabled. Additionally, inbound audio can be muted.
摘要翻译： 一种电话机（310）以及一种在电话机以扬声器模式操作时提供出站音频的方法。 包括第一单元类型标识符（360）的第一数据单元（350）可以被电话接收。 第一单元类型标识符可以是包含在第一数据单元中的音频数据的类型的指示符。 例如，第一单位类型标识符可以指示音频数据是音乐还是非音乐音频数据。 如果第一单位类型标识符具有第一值，例如指示音频数据是音乐数据的值，则可以提供从第一数据单元再现的未静音的出站音频，并且可以禁用语音活动检测。 此外，入站音频可以静音。
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公开(公告)号：US07246059B2
公开(公告)日：2007-07-17
申请号：US10626321
申请日：2003-07-24
申请人： Ali Behboodian , Pratik Desai , Chin Pan Wong
发明人： Ali Behboodian , Pratik Desai , Chin Pan Wong
CPC分类号： G10L25/78 , G10L19/012 , G10L2021/02168
摘要： The invention provides a method and system for dynamically estimating background noise. The system includes a portable communication device, a vocoder, and a voice activated detector. Based on information received by the portable communication device, the vocoder determines parameters related to incoming information including a voicing mode indicative of the periodicity of incoming information. The voice activated detector then compares the voicing mode to a threshold to determine whether a background noise estimate should be updated. The method includes the steps of: receiving a periodicity indicator and a current comfort noise level for an incoming voice frame; comparing the periodicity indicator with a predetermined threshold if the current comfort noise level is equal to a previous comfort noise level; and maintaining a background noise estimate if the periodicity indicator exceeds the predetermined threshold and revising a background noise estimate if the periodicity indicator does not exceed the predetermined threshold.
摘要翻译： 本发明提供一种用于动态估计背景噪声的方法和系统。 该系统包括便携式通信设备，声码器和语音激活检测器。 基于由便携式通信设备接收的信息，声码器确定与输入信息相关的参数，包括指示传入信息的周期性的语音模式。 语音激活检测器然后将语音模式与阈值进行比较，以确定是否应更新背景噪声估计。 该方法包括以下步骤：接收传入语音帧的周期性指示符和当前舒适噪声电平; 如果当前舒适噪声水平等于先前的舒适噪声水平，则将周期性指标与预定阈值进行比较; 以及如果所述周期性指示符超过所述预定阈值并且如果所述周期性指示符不超过所述预定阈值则修改背景噪声估计值，则保持背景噪声估计。
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