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本文概述ＤｉｇｉｃｉｐｈｅｒＨＤＴＶ系统所采用的１６０ＡＭ调制与解调原理，并对直接的ＱＡＭ法和由ＱＰＳＫ组合成的ＱＡＭ法作了比较。
This article outlines the principle of 160AM modulation and demodulation used by the Digicipher HDTV system and compares the direct QAM method with the QAM method that is a combination of QPSK.