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1.引言一些作者的意见是在所有的数字音频系统中都应采用相同的采样率(如果这个要求实际上是不可能的话,可以选择两个标准频率)。在这个报告中,我们阐明对525行制式推荐44.05594kHz和对625行制式推荐44.1kHz作为标准采样率的理由。2.要求2.1选择数字音频系统的采样率要能满足20kHz的最小带宽的要求,同时在设计反混叠滤波器时,从经济观点来看,采样率也必须高于40kHz。
1. INTRODUCTION Some authors have suggested that the same sampling rate should be used in all digital audio systems (two standard frequencies can be chosen if this is not actually possible). In this report, we clarify the rationale for 445,594 kHz for the 525-line standard and 44.1 kHz for the 625-line standard as the standard sampling rate. 2. Requirements 2.1 Select the sampling rate of the digital audio system to be able to meet the minimum bandwidth requirement of 20kHz. Also, when designing an anti-aliasing filter, the sampling rate must also be higher than 40kHz from an economic point of view.