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一、前言七十年代,高密度数字记录(HDDR)在工业发达的西方国家得到了迅速发展,并在航空、航天、遥感等领域获得广泛应用。1972年美国无线电公司(RCA)发表了“多道磁带记录器系统的设计研究报告”;1975年美国安
I. Introduction In the seventies, high-density digital recording (HDDR) developed rapidly in industrialized western countries and was widely used in the fields of aviation, aerospace and remote sensing. 1972 American Radio Company (RCA) published a “multi-channel tape recorder system design research report” in 1975 American