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四、数字记录方式模拟录象机自五十年代问世以来,得到了飞速发展,但模拟记录方式存在一些致命的缺点。例如:调频载波对重放图象的干扰、多代复制性能差等等。数字记录方式则是最为理想的记录方式,不仅录放质量高,而且复制信号劣化很小。七十年代起,世界上许多公司厂家开始研制数字录象机。由于数字方式较模拟方式要记录大量的数据,需要大幅度提高记录速
Fourth, the digital recording mode Analog video recorders since the advent of the fifties, has been rapid development, but the analog recording method has some fatal flaws. For example: FM carrier on the playback image interference, multi-generation copy of poor performance and so on. The digital recording method is the most ideal recording method, not only the high quality of recording and playing, but also the small deterioration of the copied signal. Since the seventies, many companies in the world began to develop digital video recorders. Due to the digital way to simulate a large number of data to be recorded, you need to significantly improve the recording speed