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    • 83. 发明授权
    • System and method of spoken language understanding in human computer dialogs
    • 在人机对话中口语理解的系统和方法
    • US09548051B2
    • 2017-01-17
    • US15014070
    • 2016-02-03
    • AT&T Intellectual Property II, L.P.
    • Srinivas BangaloreNarendra K. GuptaMazin G. Rahim
    • G10L21/00G06F17/20G06F17/27G10L15/18G10L15/02G10L13/04G10L15/26
    • G10L15/1815G06F17/2785G10L13/043G10L15/02G10L15/1822G10L15/265
    • A system and method are disclosed that improve automatic speech recognition in a spoken dialog system. The method comprises partitioning speech recognizer output into self-contained clauses, identifying a dialog act in each of the self-contained clauses, qualifying dialog acts by identifying a current domain object and/or a current domain action, and determining whether further qualification is possible for the current domain object and/or current domain action. If further qualification is possible, then the method comprises identifying another domain action and/or another domain object associated with the current domain object and/or current domain action, reassigning the another domain action and/or another domain object as the current domain action and/or current domain object and then recursively qualifying the new current domain action and/or current object. This process continues until nothing is left to qualify.
    • 公开了一种提高口语对话系统中的自动语音识别的系统和方法。 该方法包括将语音识别器输出划分为独立子句,识别每个自包含子句中的对话行为,通过识别当前域对象和/或当前域动作进行限定对话行为,以及确定是否可进行进一步的限定 对于当前域对象和/或当前域操作。 如果可以进一步鉴定,则该方法包括识别与当前域对象和/或当前域操作相关联的另一域操作和/或另一域对象,将另一域操作和/或另一域对象重新分配为当前域动作,以及 /或当前域对象,然后递归地限定新的当前域操作和/或当前对象。 这个过程一直持续到没有什么是剩下的资格。
    • 84. 发明授权
    • Minimum mean squared error approach to interference cancellation and maximum likelihood decoding of space-time block codes
    • 干扰消除的最小均方误差方法和空时块码的最大似然解码
    • US09544094B2
    • 2017-01-10
    • US14833642
    • 2015-08-24
    • AT&T Intellectual Property II, L.P.
    • Ayman F. NaguibNambirajan Seshadri
    • H04L27/06H04L1/06H04B1/7105H04L1/08H04B7/08H04B7/06
    • H04L1/0618H04B1/71055H04B1/71057H04B7/0669H04B7/0891H04L1/08
    • Block-encoded transmissions of a multi-antenna terminal unit are effectively detected in the presence of co-channel interfering transmissions when the base station has a plurality of antennas, and interference cancellation is combined with maximum likelihood decoding. More specifically, the signals received at the base station antennas are combined in a linear combination that relates to the channel coefficients between the various transmitting terminal units and the base antennas. By selecting proper coefficients for the linear combination and choosing probable transmitted signals that minimize a minimum mean squared error function, the signals of the various terminal units are canceled when detecting the signal of a particular unit. In another embodiment of the invention, the basic approach is used to obtain an initial estimate of the signals transmitted by one terminal unit, and the contribution of those signals is removed from the received signals prior to detecting the signals of other terminal units.
    • 当基站具有多个天线时,在存在同信道干扰传输的情况下有效地检测多天线终端单元的块编码的传输,并且将干扰消除与最大似然解码组合。 更具体地,在基站天线处接收的信号以与各个发送终端单元和基站天线之间的信道系数相关的线性组合组合。 通过选择线性组合的适当系数并选择最小化最小均方误差函数的可能发送信号,当检测到特定单元的信号时,各个终端单元的信号被消除。 在本发明的另一个实施例中,基本方法用于获得由一个终端单元发送的信号的初始估计,并且在检测到其它终端单元的信号之前,从接收到的信号中去除这些信号的贡献。