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29 条记录 (耗时 0.024 秒)

    Apparatus and method for calibration of sleep mode clock in wireless communications mobile station
    1.
    发明授权
    Apparatus and method for calibration of sleep mode clock in wireless communications mobile station 失效
    无线通信移动台睡眠模式时钟校准的装置和方法

    公开(公告)号：US5995820A

    公开(公告)日：1999-11-30

    申请号：US877217

    申请日：1997-06-17

    申请人： Linley M. Young ,  Peter P. White ,  William R. Gardner

    发明人： Linley M. Young ,  Peter P. White ,  William R. Gardner

    IPC分类号： H04B1/16 ,  H04W52/02 ,  H04B7/00

    CPC分类号： H04W52/029 ,  H04W56/0035 ,  H04W52/0293 ,  Y02B60/50

    摘要： The present invention presents a calibrator for a mobile station of a TDMA wireless communications system such that the calibrator calibrates a low-frequency clock to a high frequency clock locked to system timing. When the mobile station is in idle mode (i.e., listening to a paging channel periodically, but otherwise taking no action), the control processor commands the mobile station to enter into sleep mode to minimize power consumption. During sleep mode, the high-frequency reference clock and all clocks derived from it are turned off. Only the calibrated low-frequency clock remains operating to clock the sleep logic.

    摘要翻译： 本发明提供了一种用于TDMA无线通信系统的移动台的校准器，使得校准器将低频时钟校准为锁定到系统定时的高频时钟。 当移动台处于空闲模式（即，周期性地收听寻呼信道，但是不采​​取行动）时，控制处理器命令移动台进入睡眠模式以最小化功耗。 在休眠模式下，高频参考时钟和从其派生的所有时钟都被关闭。 只有校准的低频时钟保持运行以对睡眠逻辑进行定时。

    Apparatus and method for shutdown of wireless communications mobile station with multiple clocks
    2.
    发明授权
    Apparatus and method for shutdown of wireless communications mobile station with multiple clocks 失效
    具有多个时钟的无线通信移动台关闭的装置和方法

    公开(公告)号：US5950120A

    公开(公告)日：1999-09-07

    申请号：US877215

    申请日：1997-06-17

    申请人： William R. Gardner ,  Linley M. Young ,  Peter P. White

    发明人： William R. Gardner ,  Linley M. Young ,  Peter P. White

    IPC分类号： H04B1/16 ,  H04M1/73 ,  H04Q7/20 ,  H04B1/38

    CPC分类号： H04W52/029 ,  H04W52/0293 ,  Y02B60/50

    摘要： The present invention presents a mobile station of a wireless communications system such that when the mobile station is in idle mode (i.e., listening to a paging channel periodically, but otherwise taking no action), the control processor commands the mobile station to enter into sleep mode to minimize power consumption. During sleep mode, the high-frequency reference clock and thus all high-frequency clocks derived from it are turned off. Only a low-frequency clock remains operating at all times to clock the sleep logic.

    摘要翻译： 本发明提出了一种无线通信系统的移动台，使得当移动台处于空闲模式时（即，周期性地收听寻呼信道，但是不采​​取任何动作），控制处理器命令移动台进入睡眠状态 模式以最小化功耗。 在睡眠模式下，高频参考时钟以及因此导出的所有高频时钟都被关闭。 只有低频时钟始终保持运行，以便对睡眠逻辑进行定时。

    Encoding rate selection in a variable rate vocoder
    3.
    发明授权
    Encoding rate selection in a variable rate vocoder 失效
    可变速率声码器中的编码速率选择

    公开(公告)号：US5742734A

    公开(公告)日：1998-04-21

    申请号：US288413

    申请日：1994-08-10

    申请人： Andrew P. DeJaco ,  William R. Gardner

    发明人： Andrew P. DeJaco ,  William R. Gardner

    IPC分类号： G10L19/00 ,  G10L19/04 ,  G10L19/14 ,  G10L21/02 ,  H03M7/30 ,  G10L9/14

    CPC分类号： G10L19/0208 ,  G10L19/0204 ,  G10L19/22 ,  G10L19/24 ,  G10L25/78 ,  G10L19/10

    摘要： It is a first objective of the present invention to provide a method by which to reduce the probability of coding low energy unvoiced speech as background noise. The present invention determines an encoding rate by examining subbands of the input signal, by this method unvoiced speech can be distinguished from background noise. A second objective of the present invention is to provide a means by which to set the threshold levels that takes into account signal energy as well as background noise energy. In the present invention, the background noise is not used to determine threshold values, rather the signal to noise ratio of an input signal is use to determine the threshold values. A third objective of the present invention is to provide a method for coding music passing through a variable rate vocoder. The present invention examines the periodicity of the input signal to distinguish music from background noise.

    摘要翻译： 本发明的第一目的是提供一种减少将低能量无声语音编码为背景噪声的可能性的方法。 本发明通过检查输入信号的子带来确定编码速率，通过这种方法，可以将清音语音与背景噪声区分开来。 本发明的第二目的是提供一种用于设置考虑到信号能量以及背景噪声能量的阈值水平的装置。 在本发明中，背景噪声不用于确定阈值，而是使用输入信号的信噪比来确定阈值。 本发明的第三个目的是提供一种用于对通过可变速率声码器的音乐进行编码的方法。 本发明检查输入信号的周期性，以区分音乐与背景噪声。

    Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors
    4.
    发明授权
    Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors 失效
    用于安排声码器数据的方法和系统，用于掩蔽传输通道引起的错误

    公开(公告)号：US5600754A

    公开(公告)日：1997-02-04

    申请号：US194824

    申请日：1994-02-14

    申请人： William R. Gardner ,  Paul E. Jacobs

    发明人： William R. Gardner ,  Paul E. Jacobs

    IPC分类号： G10L19/02 ,  G10L19/00 ,  G10L19/06 ,  H03M13/35 ,  H04B1/66 ,  H04L1/00 ,  G01L9/00

    CPC分类号： H04L1/0071 ,  G10L19/005 ,  G10L19/07 ,  H03M13/35 ,  H04B1/665 ,  H04L1/0083 ,  H04L1/0086

    摘要： A method and system by which parameter data representative of vocoded speech are organized into a data packet for transmission so as to reduce the impact of transmission channel induced errors on the data packet. A data packet is constructed with certain most perceptually significant bits of parameter data at the beginning of the data packet. Following in the data packet are lesser perceptually significant bits of the same parameter data. Other parameter data then follows in the data packet. Interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet are most perceptually significant bits of other parameter data. A parity check code is computed from the most perceptually significant bits in the data packet and also interleaved in the data packet following the most perceptually significant bits at the beginning of the data packet.

    摘要翻译： 将代表声码语音的参数数据组织成用于发送的数据分组的方法和系统，以便减少传输信道引起的错误对数据分组的影响。 数据包在数据包的开头被构造成具有某些最感知有效的参数数据位。 在数据包中的以下是相同参数数据的较小的感知有效位。 其他参数数据随后在数据包中。 在数据包开头的最感知有效位之后的数据包中交织是其他参数数据的最感知有效位。 从数据分组中最感知有效位计算奇偶校验码，并且在数据分组的开始处跟随最感知有效位之后的数据分组中交织。

    Variable rate vocoder
    8.
    发明授权
    Variable rate vocoder 失效
    可变速率声码器

    公开(公告)号：US5778338A

    公开(公告)日：1998-07-07

    申请号：US788728

    申请日：1997-01-23

    申请人： Paul E. Jacobs ,  William R. Gardner ,  Chong U. Lee ,  Klein S. Gilhousen ,  S. Katherine Lam ,  Ming-Chang Tsai

    发明人： Paul E. Jacobs ,  William R. Gardner ,  Chong U. Lee ,  Klein S. Gilhousen ,  S. Katherine Lam ,  Ming-Chang Tsai

    IPC分类号： G10L19/00 ,  G10L20060101 ,  G10L11/02 ,  G10L19/02 ,  G10L19/04 ,  G10L19/06 ,  G10L19/12 ,  G10L19/14 ,  G10L21/02 ,  G10L21/04 ,  H03M7/30 ,  H03M7/36 ,  H04B1/66 ,  H04J3/16 ,  H04L1/00 ,  G01L5/00

    CPC分类号： H04L1/0057 ,  G10L19/005 ,  G10L19/012 ,  G10L19/12 ,  G10L19/22 ,  G10L19/24 ,  G10L25/78 ,  H04B1/66 ,  H04J3/1688 ,  H04L1/0014 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0046 ,  G10L2025/786

    摘要： An apparatus and method for performing speech signal compression, by variable rate coding of frames of digitized speech samples. The level of speech activity for each frame of digitized speech samples is determined and an output data packet rate is selected from a set of rates based upon the determined level of frame speech activity. A lowest rate of the set of rates corresponds to a detected minimum level of speech activity, such as background noise or pauses in speech, while a highest rate corresponds to a detected maximum level of speech activity, such as active vocalization. Each frame is then coded according to a predetermined coding format for the selected rate wherein each rate has a corresponding number of bits representative of the coded frame. A data packet is provided for each coded frame with each output data packet of a bit rate corresponding to the selected rate. At the decoder, if a frame is lost due to a channel error, the error is masked by maintaining a fraction of the previous frame's energy and smoothly transitioning to background noise.

    摘要翻译： 一种用于通过数字化语音样本的帧的可变速率编码来执行语音信号压缩的装置和方法。 确定每个数字化语音样本帧的语音活动水平，并且基于所确定的帧语音活动水平从一组速率中选择输出数据分组速率。 一组速率的最低速率对应于检测到的语音活动的最低水平，例如背景噪声或语音中的停顿，而最高速率对应于检测到的语音活动的最大水平，例如主动发声。 然后根据所选择的速率的预定编码格式对每个帧进行编码，其中每个速率具有表示编码帧的相应位数。 为每个编码帧提供数据分组，每个输出数据分组的比特率对应于所选择的速率。 在解码器中，如果帧由于信道错误而丢失，则通过保持前一帧的能量的一小部分并平滑地转换到背景噪声来掩蔽该错误。

    Low power dual processor architecture for multi mode devices
    10.
    发明授权
    Low power dual processor architecture for multi mode devices 有权
    用于多模式设备的低功耗双处理器架构

    公开(公告)号：US08351985B2

    公开(公告)日：2013-01-08

    申请号：US13354377

    申请日：2012-01-20

    申请人： Ranganathan Krishnan ,  Albert S. Ludwin ,  William R. Gardner

    发明人： Ranganathan Krishnan ,  Albert S. Ludwin ,  William R. Gardner

    IPC分类号： H04B1/38 ,  H04W52/02

    CPC分类号： G06F1/3203 ,  G06F1/3293 ,  H04W52/028 ,  H04W52/0287 ,  Y02D10/122 ,  Y02D70/1222 ,  Y02D70/1242

    摘要： A mobile computing device with multiple modes, for example, wireless communication and personal computing, has an application processor and a communication processor. In the computing mode, the application processor is the master processor. In the communication mode, the application processor is deenergized to conserve battery power, with the communication processor functioning as the master processor by accessing the device's peripheral bus using the memory interface of the communication processor.

    摘要翻译： 具有多种模式（例如无线通信和个人计算）的移动计算设备具有应用处理器和通信处理器。 在计算模式下，应用处理器是主处理器。 在通信模式下，应用处理器被断电以节省电池电力，通信处理器通过使用通信处理器的存储器接口访问设备的外围总线而用作主处理器。