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    • 6. 发明申请
    • DC OFFSET COMPENSATING SYSTEM AND METHOD
    • DC偏移补偿系统和方法
    • US20100254491A1
    • 2010-10-07
    • US12416188
    • 2009-04-01
    • Richard Louis Zinser
    • Richard Louis Zinser
    • H04L25/06
    • H04L25/062
    • A system for removing a DC-offset component from an input signal is presented. The system includes a sorter to separate positive samples and negative samples of the input signal. The system further includes a positive sample average generator to calculate a positive sample average according to a number of positive samples in the input signal and a negative sample average generator to calculate a negative sample average according to a number of negative samples in the input signal. A balanced average generator is provided for receiving positive and negative sample averages from the positive and negative sample average generators and for generating a reference signal. The system further includes a subtractor for subtracting the reference signal from the input signal to generate a DC-offset compensated output signal.
    • 提出了一种用于从输入信号中去除DC偏移分量的系统。 该系统包括分选器以分离输入信号的正样本和负样本。 该系统还包括正采样平均发生器,以根据输入信号中的正采样数量和负采样平均发生器根据输入信号中的负采样数来计算负采样平均值的正样本平均值。 提供平衡平均发生器用于从正和负采样平均发生器接收正和负采样平均值,并产生参考信号。 该系统还包括用于从输入信号中减去参考信号以产生DC偏移补偿输出信号的减法器。
    • 9. 发明授权
    • Channel decoder using vocoder joint statistics
    • 频道解码器使用声码器联合统计
    • US06393072B1
    • 2002-05-21
    • US09340102
    • 1999-06-25
    • John Anderson Fergus RossNick Andrew Van StralenMark Lewis GrabbSteven Robert KochRichard Louis Zinser, Jr.John Bailey Anderson
    • John Anderson Fergus RossNick Andrew Van StralenMark Lewis GrabbSteven Robert KochRichard Louis Zinser, Jr.John Bailey Anderson
    • H04L2706
    • H04L1/0047H04L25/061H04L25/067
    • A method for decoding (voice)data where the data is encoded by a finite-state data encoder (216) for transmission over a data channel (18), includes the step of procuring a table of joint statistics representing the probability of occurrence, in a frame of source data of each of the bits of the frame. The joint statistics may be determined ahead of time. The method includes the step of calculating intermediate gamma signals in response to the decoded data of the preceding frame and the joint statistics. The joint statistics source distribution signals represent the likelihood that, for a given logic level of the preceding bit, the “current” bit takes on a particular state; for uncorrelated bits, this value is 0.5. State probability signals and transition probability signals are generated from the gamma signals. The state probability and transition probability signals are processed to produce bit probability signals indicative of the probability that the current bit is in a given state, from which hard bit decisions can be made.
    • 一种用于解码(语音)数据的方法,其中数据由有限状态数据编码器(216)编码,用于通过数据信道(18)进行传输,包括以下步骤:采购表示发生概率的联合统计表, 帧的每个比特的源数据帧。 联合统计可以提前确定。 该方法包括响应于前一帧的解码数据和联合统计来计算中间伽马信号的步骤。 联合统计源分布信号表示对于前一比特的给定逻辑电平,“当前”比特处于特定状态的可能性; 对于不相关的位,此值为0.5。 从伽马信号产生状态概率信号和转移概率信号。 处理状态概率和转移概率信号以产生指示当前比特处于给定状态的概率的比特概率信号,从中可以进行硬比特决定。