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1. 发明申请

WO2006014924A2 METHOD AND SYSTEM FOR IMPROVING VOICE QUALITY OF A VOCODER 审中-公开
标题翻译：用于提高VOCODER语音质量的方法和系统
公开(公告)号：WO2006014924A2
公开(公告)日：2006-02-09
申请号：PCT/US2005026433
申请日：2005-07-26
申请人： MOTOROLA INC , DESAI PRATIK V , BOILLOT MARC A , BEHBOODIAN ALI
发明人： BOILLOT MARC A , BEHBOODIAN ALI
IPC分类号： G10L25/90
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.
摘要翻译：本发明涉及用于改善声码器（138,158）的语音质量的方法（300）和系统（100）。该方法包括以下步骤：在发送单元（110）处监视（312）语音信号（400）的音调; 当语音信号的音调达到预定阈值（840）时，将语音信号的音调移位（326）至预定范围的至少一部分（810）; 将音调移位的语音信号发送（338）到接收单元（112）; 并且在接收单元处，将音调移位的语音信号转换（342）到补偿在发送单元处移动语音信号的音高的步骤的水平。

2. 发明申请

WO2006055354A3 ADAPTIVE TIME-BASED NOISE SUPPRESSION 审中-公开
标题翻译：自适应时间噪声抑制
公开(公告)号：WO2006055354A3
公开(公告)日：2007-01-04
申请号：PCT/US2005040499
申请日：2005-11-08
申请人： MOTOROLA INC , BEHBOODIAN ALI , BOILLOT MARC A , DESAI PRATIK V , WONG CHIN P
发明人： BEHBOODIAN ALI , BOILLOT MARC A , DESAI PRATIK V , WONG CHIN P
IPC分类号： A61F11/06 , H04M1/00 , H04R15/00
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）。

3. 发明申请

WO2006026221A3 SPEAKERPHONE HAVING IMPROVED OUTBOUND AUDIO QUALITY 审中-公开
标题翻译： SPEAKERPHONE具有改善的出站音频质量
公开(公告)号：WO2006026221A3
公开(公告)日：2006-06-22
申请号：PCT/US2005029775
申请日：2005-08-23
申请人： MOTOROLA INC , BOILLOT MARC A , BEHBOODIAN ALI , DESAI PRATIK V
发明人： BOILLOT MARC A , BEHBOODIAN ALI , DESAI PRATIK V
IPC分类号： H04B1/38
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（310）以及当电话在扬声器模式下工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）可以由电话接收。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，第一单元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。如果第一单元类型标识符具有第一值，例如表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经调节的出站音频，并且可以禁止话音活动检测。此外，入站音频可以静音。

4. 发明申请

WO2006068732A2 HANDS-FREE PUSH-TO-TALK RADIO 审中-公开
标题翻译：无手柄无线电
公开(公告)号：WO2006068732A2
公开(公告)日：2006-06-29
申请号：PCT/US2005041331
申请日：2005-11-16
申请人： MOTOROLA INC , LANDRON DANIEL J , BEHBOODIAN ALI , WONG CHIN P
发明人： LANDRON DANIEL J , BEHBOODIAN ALI , WONG CHIN P
IPC分类号： G10L11/06
CPC分类号： H04M1/6041 , G10L25/78
摘要： A hands-free digital push-to-talk device (102) includes a digital background noise suppressor (302), a digital voice activity detector (304), an audio buffer (306), as well as a decision handler (308), embedded inside the device's (102) digital signal processor (222). Audio is buffered until the decision handler (308) determines that speech is present on an audio stream fed to the voice activity detector (304). The decision handler (308) makes the decision by assigning weighted values to each voice activity detector (304) determination, the weighted value varying depending on the state of the device (102) and temporal distance from the present time.
摘要翻译：免提数字一键通设备（102）包括数字背景噪声抑制器（302），数字语音活动检测器（304），音频缓冲器（306）以及决策处理器（308）嵌入设备（102）数字信号处理器（222）内部。音频被缓冲，直到判定处理器（308）确定在馈送到语音活动检测器（304）的音频流上存在语音。决策处理器（308）通过将加权值分配给每个语音活动检测器（304）来确定，该加权值根据设备（102）的状态和从当前时间的时间距离而变化。

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