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1982年春,美国联邦通信委员会(FCC)作出了历史性的决断,将调幅立体声广播制式的选择“推向市场。”。这是一项迈向撤消技术标准的大胆试验,而且,实际上为了认定制式,只要立体声变换装置的特性符合FCC制定的最低标准,参加竞争的所有调幅立体声制式都可以进行广播。此后,C-QUAM(兼容正交调幅制)制式,不仅迅速地在美国和加拿大处于优先的地位,而且澳大利亚也选定他们为标准制式,最
In the spring of 1982, the Federal Communications Commission (FCC) made a historic decision to “market the AM Stereo” option. This is a daring experiment towards withdrawing technical standards and, in fact, to qualify as a standard all competing AM stereo systems can broadcast as long as the features of the STB comply with the FCC’s minimum standards. Since then, the C-QUAM (Compatible with Quadrature Amplitude Modulation) standard has not only been rapidly prioritized in the United States and Canada, but Australia has also chosen them as the standard