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33 条记录 (耗时 0.02 秒)

    Systems, methods, apparatus, and computer-readable media for noise injection
    1.
    发明授权
    Systems, methods, apparatus, and computer-readable media for noise injection 有权
    用于噪声注入的系统，方法，装置和计算机可读介质

    公开(公告)号：US09208792B2

    公开(公告)日：2015-12-08

    申请号：US13211027

    申请日：2011-08-16

    申请人： Vivek Rajendran ,  Ethan Robert Duni ,  Venkatesh Krishnan

    发明人： Vivek Rajendran ,  Ethan Robert Duni ,  Venkatesh Krishnan

    IPC分类号： G10L21/00 ,  G10L25/90 ,  G10L21/02 ,  G10L19/028

    CPC分类号： G10L19/028

    摘要： A method of processing an audio signal is described. The method includes selecting one among a plurality of entries of a codebook based on information from the audio signal. The method also includes determining locations, in a frequency domain, of zero-valued elements of a first signal that is based on the selected codebook entry. The method further includes calculating energy of the audio signal at the determined frequency-domain locations. The method additionally includes calculating a value of a measure of a distribution of the energy of the audio signal among the determined frequency-domain locations. The method also includes calculating a noise injection gain factor based on the calculated energy and the calculated value.

    摘要翻译： 描述了一种处理音频信号的方法。 该方法包括基于来自音频信号的信息来选择码本的多个条目之一。 该方法还包括在频域中确定基于所选码本条目的第一信号的零值元素的位置。 该方法还包括在确定的频域位置处计算音频信号的能量。 该方法还包括计算所确定的频域位置之间的音频信号的能量分布的度量的值。 该方法还包括基于计算的能量和计算值来计算噪声注入增益因子。

    Systems and methods for including an identifier with a packet associated with a speech signal
    2.
    发明授权
    Systems and methods for including an identifier with a packet associated with a speech signal 有权
    用于将具有与语音信号相关联的分组的标识符包括在内的系统和方法

    公开(公告)号：US08135047B2

    公开(公告)日：2012-03-13

    申请号：US11677173

    申请日：2007-02-21

    申请人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    发明人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    IPC分类号： H04J3/04

    CPC分类号： G10L19/167 ,  G10L19/24

    摘要： A method for including an identifier with a packet associated with a speech signal is described. A signal is received. The signal is partitioned into a plurality of frames. A frame of the signal is encoded into a packet. A determination is made if the packet is encoded as a wideband packet or a narrowband packet. An identifier is packed in the packet based on the determination. The packet is transmitted. At least two illegal values are provided from an N-bit parameter, wherein at least one bit from the N-bit parameter is used to carry information. A number of bits from the N-bit parameter that are used to carry information is equal to log2(X), wherein X is the number of illegal values provided from the N-bit parameter.

    摘要翻译： 描述了一种用于包括与语音信号相关联的分组的标识符的方法。 接收到一个信号。 信号被分割成多个帧。 信号的帧被编码成一个数据包。 如果分组被编码为宽带分组或窄带分组，则确定。 基于确定将标识符打包在分组中。 数据包被传输。 从N比特参数提供至少两个非法值，其中来自N比特参数的至少一个比特用于携带信息。 来自用于传送信息的N位参数的位数等于log2（X），其中X是从N位参数提供的非法值的数量。

    SYSTEMS AND METHODS FOR DYNAMIC NORMALIZATION TO REDUCE LOSS IN PRECISION FOR LOW-LEVEL SIGNALS
    3.
    发明申请
    SYSTEMS AND METHODS FOR DYNAMIC NORMALIZATION TO REDUCE LOSS IN PRECISION FOR LOW-LEVEL SIGNALS 有权
    动态正规化的系统和方法，以减少低级别信号精度的损失

    公开(公告)号：US20080130793A1

    公开(公告)日：2008-06-05

    申请号：US11669407

    申请日：2007-01-31

    申请人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    发明人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    IPC分类号： H04L25/10

    CPC分类号： G10L19/0204 ,  G10L21/00 ,  G10L21/0388

    摘要： A normalization factor for a current frame of a signal may be determined. The normalization factor may depend on an amplitude of the current frame of the signal. The normalization factor may also depend on values of states after one or more operations were performed on a previous frame of a normalized signal. The current frame of the signal may be normalized based on the normalization factor that is determined. The states' normalization factor may be adjusted based on the normalization factor that is determined.

    摘要翻译： 可以确定信号的当前帧的归一化因子。 归一化因子可以取决于信号的当前帧的幅度。 归一化因子还可以取决于对归一化信号的先前帧执行一个或多个操作之后的状态值。 信号的当前帧可以基于所确定的归一化因子来归一化。 国家的归一化因子可以根据确定的归一化因子进行调整。

    Systems, methods, and apparatus for signal change detection
    5.
    发明授权
    Systems, methods, and apparatus for signal change detection 有权
    用于信号变化检测的系统，方法和装置

    公开(公告)号：US08725499B2

    公开(公告)日：2014-05-13

    申请号：US11830548

    申请日：2007-07-30

    申请人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    发明人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    IPC分类号： G10L11/06

    CPC分类号： G10L19/012 ,  G10L2025/786

    摘要： Disclosed configurations include systems, methods, and apparatus arranged to generate a sequence of spectral tilt values that is based on inactive frames of a speech signal. For each of a plurality of inactive frames of the speech signal, a transmit decision is made according to a change calculated among at least two corresponding values of the sequence. The outcome of the transmit decision determines whether a silence description is transmitted for the corresponding inactive frame.

    摘要翻译： 公开的配置包括被配置为基于语音信号的非活动帧产生频谱倾斜值序列的系统，方法和装置。 对于语音信号的多个无效帧中的每一个，根据在序列的至少两个对应值之间计算的改变进行发送决定。 发送决定的结果确定是否为相应的非活动帧发送静音描述。

    Systems and methods for dimming a first packet associated with a first bit rate to a second packet associated with a second bit rate
    7.
    发明授权
    Systems and methods for dimming a first packet associated with a first bit rate to a second packet associated with a second bit rate 有权
    用于将与第一比特率相关联的第一分组调光到与第二比特率相关联的第二分组的系统和方法

    公开(公告)号：US08279889B2

    公开(公告)日：2012-10-02

    申请号：US11619798

    申请日：2007-01-04

    申请人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    发明人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    IPC分类号： H04J3/16

    CPC分类号： G10L19/173 ,  G10L19/24

    摘要： A method for dimming a first packet associated with a first bit rate to a second packet associated with a second bit rate is described. A first packet is received. The first packet is analyzed to determine a first bit rate associated with the first packet. Bits associated with at least one parameter are discarded from the first packet. Remaining bits associated with one or more parameters and a special identifier are packed into a second packet associated with a second bit rate. The second packet is transmitted.

    摘要翻译： 描述了将与第一比特率相关联的第一分组调光到与第二比特率相关联的第二分组的方法。 收到第一个数据包。 分析第一分组以确定与第一分组相关联的第一比特率。 与至少一个参数相关联的比特从第一个分组被丢弃。 与一个或多个参数相关联的剩余比特和特殊标识符被打包到与第二比特率相关联的第二个分组中。 发送第二个数据包。

    Systems, methods, and apparatus for dynamic normalization to reduce loss in precision for low-level signals
    8.
    发明授权
    Systems, methods, and apparatus for dynamic normalization to reduce loss in precision for low-level signals 有权
    用于动态归一化的系统，方法和装置，以减少低电平信号的精度损失

    公开(公告)号：US08126708B2

    公开(公告)日：2012-02-28

    申请号：US12023030

    申请日：2008-01-30

    申请人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    发明人： Vivek Rajendran ,  Ananthapadmanabhan A. Kandhadai

    IPC分类号： G10L19/14

    CPC分类号： G10L19/0204 ,  G10L21/00 ,  G10L21/0388

    摘要： A dynamic normalization factor for a current frame of a signal is determined to reduce loss in precision for low-level signals. The normalization factor depends on an amplitude of the current frame of the signal. The normalization factor also depends on values of filter states after one or more operations were performed on a previous frame of a normalized signal and on the normalization factor for the previous frame. The current frame of the signal is normalized based on the normalization factor that is determined. The states' normalization factor may be adjusted based on the normalization factor that is determined.

    摘要翻译： 确定信号的当前帧的动态归一化因子以减少低电平信号的精度损失。 归一化因子取决于信号的当前帧的幅度。 归一化因子还取决于对归一化信号的先前帧执行一个或多个操作之后的滤波器状态的值以及对于前一帧的归一化因子。 信号的当前帧根据确定的归一化因子进行归一化。 国家的归一化因子可以根据确定的归一化因子进行调整。

    CODEC DEPLOYMENT USING IN-BAND SIGNALS
    10.
    发明申请
    CODEC DEPLOYMENT USING IN-BAND SIGNALS 有权
    CODEC部署使用带内信号

    公开(公告)号：US20110294501A1

    公开(公告)日：2011-12-01

    申请号：US12904900

    申请日：2010-10-14

    申请人： Min Wang ,  Dai Yang ,  Vivek Rajendran ,  Ananthapadmanabhan Arasanipalai Kandhadai ,  Alireza R. Heidari ,  Jeremy P. Toman

    发明人： Min Wang ,  Dai Yang ,  Vivek Rajendran ,  Ananthapadmanabhan Arasanipalai Kandhadai ,  Alireza R. Heidari ,  Jeremy P. Toman

    IPC分类号： H04W4/00

    CPC分类号： H04L65/1043 ,  H04L65/1069 ,  H04L65/601 ,  H04L69/24 ,  H04W76/20 ,  H04W88/181

    摘要： After a call is established between two stations using a codec that has been negotiated during call setup, in-band signaling may be used between the two stations to change the codec that is to be used. The in-band signals are indicative that the station that is transmitting the in-band signals can operate with a second codec and are used to probe whether the receiving station can also operate with that second codec. If the receiving station detects and reacts to the in-band signals, then both stations change to communicate with the second codec. The second codec has compatible packet sizes of the deployed (originally negotiated) codec without any need of infrastructure upgrade and/or quality compromise to legacy phone users (i.e., stations that cannot operate with the second codec).

    摘要翻译： 在使用在呼叫建立期间协商的编解码器的两个站之间建立呼叫之后，可以在两个站之间使用带内信令来改变要使用的编解码器。 带内信号指示正在发送带内信号的站可以用第二编解码器操作，并且用于探测接收站是否也可以与该第二编解码器一起操作。 如果接收站检测并对带内信号作出反应，则两台站改变以与第二编解码器进行通信。 第二编解码器具有部署的（最初协商的）编解码器的兼容分组大小，而不需要对传统电话用户（即，不能与第二编解码器一起操作的站）的基础架构升级和/或质量损害。