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    • 24. 发明授权
    • Transmultiplexer
    • 多路分解器
    • US4237551A
    • 1980-12-02
    • US972458
    • 1978-12-22
    • Madihally J. Narasimha
    • Madihally J. Narasimha
    • H04J4/00
    • H04J4/005
    • A transmultiplexer and method for use in a telephone system for translating information between time division and frequency division multiplexed formats. The transmultiplexer includes discrete cosine transform processor means connected to receive a linearly coded time division multiplexed signal representing a plurality of information channels for transforming the time division signal into a frequency division multiplexed signal and also includes weighting network means for weighting the transformed signal with predetermined real coefficients thereby forming a frequency division multiplexed signal corresponding to said time division multiplexed signal. The weighting network means are connected to receive a second multi-channel frequency division multiplexed signal for weighting the frequency signal with predetermined real coefficients thereby forming a weighted signal. An inverse discrete cosine transform processor transforms the weighted signal into a multi-channel time division multiplexed signal corresponding to the frequency division multiplexed signal.
    • 一种用于电话系统中的用于在时分和频分复用格式之间转换信息的多路复用器和方法。 所述多路复用器包括离散余弦变换处理器装置,连接用于接收表示用于将所述时分信号变换为频分多路复用信号的多个信道的线性编码时分复用信号,并且还包括加权网络装置,用于以预定的实数 从而形成对应于所述时分复用信号的频分多路复用信号。 加权网络装置被连接以接收第二多信道频分多路复用信号,用于以预定的实数加权频率信号,从而形成加权信号。 逆离散余弦变换处理器将加权信号转换为对应于频分复用信号的多通道时分复用信号。