| 摘要 |
PURPOSE:To obtain two new degree-group digital multiplex data signals having a half of the frequency of a higher-group digital multiplex data signal by selecting the higher-group digital multiplex data signal successively at every bit in the frame constituting method of the higher group digital multiplex data signal. CONSTITUTION:Six lower-group digital multiplex data signals 1-6 are multiplexed digitally to constitute the higher-group digital multiplex data signal. Frame bits, data bits, service bits, etc., of the higher-group digital multiplex data signal are selected successively at every bit for the purpose of constituting new degree-group digital multiplex data signals A and B having a half of the higher group digital multiplex data signal from this higher-group digital multiplex data signal.
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