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前言自从一九五六年美国安培克斯公司首先研制成功四磁头录象机以来,录象技术20多年来有了惊人的发展。特别是近十年来磁带录象技术有了重大的突破。现在已达到高密度、高可靠性、高自动化、高稳定的程度。磁带录象机虽然是磁记录的一个分支,却对磁记录技术的发展起了很大的推动作用。磁带录象机除电视广播、家庭应用外,已深入到国民经济的各个领域,深入到科研、宇航、军事等部门。在国际上已作为传递情报的一种重要手段。
Foreword Since 1964, the first American company to develop a successful four-head video recorder, video technology has witnessed a remarkable development over the past 20 years. In particular, there has been a major breakthrough in video tape recording technology in the past decade. It has now reached the level of high density, high reliability, high automation and high stability. Although the video tape recorder is a branch of magnetic recording, it has greatly promoted the development of magnetic recording technology. In addition to television broadcasting, video tape recorders, home applications, has deep access to all areas of the national economy, in-depth research, aerospace, military and other departments. Internationally, it has been used as an important means of transmitting intelligence.