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公开(公告)号：US6157906A
公开(公告)日：2000-12-05
申请号：US127925
申请日：1998-07-31
申请人： Richard Brent Nicholls , Chin Pan Wong , Martin Thuo Karanja , Patrick Joseph Doran , David James Graham
发明人： Richard Brent Nicholls , Chin Pan Wong , Martin Thuo Karanja , Patrick Joseph Doran , David James Graham
CPC分类号： G10L25/78
摘要： A digital signal processor (100) receives a digitally vocoded signal (102), and calculates a staggered average value (404) from the frame energy of each received frame, or the product of the frame energy and a voicing value. While the staggered average value is above a threshold voice indicator value, speech is declared present.
摘要翻译： 数字信号处理器（100）接收数字声码信号（102），并根据每个接收帧的帧能量或帧能量与浊音值的乘积来计算交错平均值（404）。 虽然交错的平均值高于阈值语音指标值，但声明声明存在。
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2.发明授权Using vocoded parameters in a staggered average to provide speakerphone operation based on enhanced speech activity thresholds 失效以交错平均值使用声码参数，提供基于增强语音活动阈值的免提电话操作公开(公告)号：US06223154B1
公开(公告)日：2001-04-24
申请号：US09127348
申请日：1998-07-31
IPC分类号： G10L1102
摘要： A portable communication device (104), such as a cellular telephone, is operable in a speakerphone mode. The communication device uses a digital communication scheme, and both receives and generates vocoded signals. The speakerphone provides half duplex operation to eliminate echo. When voice activity is detected, the device activates a speaker and mutes a microphone to avoid echo. When no voice activity is detected in the received signal, the speaker is muted and the microphone activated. To determine when speech activity is present in the received signal, a novel voice activity detection (VAD) algorithm is used which takes advantage of parameters provided as part of the received vocoded signal. The new voice activity algorithm includes calculating a staggered average of the frame energy value for a sequence of received frames, and determining if the staggered average value exceeds a threshold. The algorithm also includes adjusting the threshold level by basing the threshold level on the voicing value of the present vocoded frame.
摘要翻译： 诸如蜂窝电话的便携式通信设备（104）可以在免提电话模式下操作。 通信设备使用数字通信方案，并且都接收和生成语音信号。 扬声器提供半双工操作以消除回波。 当检测到语音活动时，设备激活扬声器并使麦克风静音以避免回音。 在接收到的信号中没有检测到语音活动时，扬声器被静音并且麦克风被激活。 为了确定接收到的信号中是否存在语音活动，使用新颖的语音活动检测（VAD）算法，其利用作为所接收的声码信号的一部分提供的参数。 新的语音活动算法包括计算接收帧序列的帧能量值的交错平均值，以及确定交错平均值是否超过阈值。 该算法还包括通过将阈值水平基于当前语音帧的语音值来调整阈值水平。
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3.发明授权Method for selectively including leading fricative sounds in a portable communication device operated in a speakerphone mode 失效用于在扬声器模式下操作的便携式通信设备中选择性地包括引导摩擦音的方法
公开(公告)号：US6122531A
公开(公告)日：2000-09-19
申请号：US127536
申请日：1998-07-31
CPC分类号： H04B1/46
摘要： In a portable communication device (104) that is able to operate in a speakerphone mode, a user interface such as a keypad (120) and display (122) are provided to allow the user to select (1104) an enhanced mode so that leading fricatives of speech are more likely to be detected as speech, and played over a speaker (214). Upon selecting the enhanced mode of operation, the voicing value of each frame of vocoded speech received is increased, thus making it more likely for energetic fricative frames to be detected as speech.
摘要翻译： 在能够以扬声器电话模式操作的便携式通信设备（104）中，提供诸如键盘（120）和显示器（122）的用户接口，以允许用户选择（1104）增强模式，使得引导 语音的摩擦更有可能被检测为语音，并且通过扬声器播放（214）。 在选择增强的操作模式时，接收到的语音语音的每个帧的发声值增加，从而使得能量检测作为语音更有可能。
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4.发明授权Method for suppressing speaker activation in a portable communication device operated in a speakerphone mode 失效用于在扬声器模式下操作的便携式通信设备中抑制扬声器激活的方法
公开(公告)号：US6138040A
公开(公告)日：2000-10-24
申请号：US127692
申请日：1998-07-31
CPC分类号： H04M9/08
摘要： In a portable communication device (100) operated in a speakerphone mode, when no speech is present in either the outbound signal received from a communication system, the speaker (114) of the communication device is muted and the microphone (120) activated. When speech is detected in an inbound signal (202, 204, 206), and speech is also subsequently detected in the outbound signal (214), the speaker is left inactivated and the microphone kept in an activated state. To determine if speech is present in the inbound signal, the inbound signal is voided, providing a succession of frames (206), each frame having a frame energy parameter and a background noise parameter (208). If the frame energy of a given frame sufficiently exceeds the an average background noise value for the given frame, then speech is declared present. To smooth this half duplex operation, a timer may be used so that brief periods of silence or fricative parts of speech do not result in a revocation of the declaration of speech in the inbound signal.
摘要翻译： 在以扬声器模式操作的便携式通信设备（100）中，当从通信系统接收到的出站信号中没有语音出现时，通信设备的扬声器（114）被静音并且麦克风（120）被激活。 当在入站信号（202,204,206）中检测到语音，并且还在出站信号（214）中随后检测到语音时，扬声器被停用，麦克风保持在激活状态。 为了确定入站信号中是否存在语音，入站信号无效，提供一系列帧（206），每帧具有帧能量参数和背景噪声参数（208）。 如果给定帧的帧能量足够超过给定帧的平均背景噪声值，则声明存在语音。 为了平滑这种半双工操作，可以使用定时器，使得短暂的静音或摩擦的部分语音不会导致在入站信号中声明语音的撤销。
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