Because it is an asynchronous mechanism, ATM differs from synchronous transfer mode methods, where time-division multiplexing techniques are employed to preassign users to time slots.
因为它是一种异步的机制，ATM与同步传输模式理论（比如时分复用技术，它为每个用户预定义了时间片）并不相同。
China digital television terrestrial broadcasting standard GB20600-2006 is based on TDS-OFDM (Time-Domain Synchronous orthogonal Frequency Division Multiplexing) systems.
中国地面数字电视广播标准GB20600 - 2006是基于时域同步-正交频分复用(TDS - OFDM)系统的。
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