HIMA K9203A 模拟信号被ADC转换成数字流
DAC和ADC是的一部分使能技术这极大地促进了数字革命。举例来说,考虑一个典型的长途电话。呼叫者的声音被转换成模拟电信号麦克风,然后模拟信号被ADC转换成数字流。然后,数字流被分成网络数据包在那里它可以与其他文件一起被发送数字数据,不一定是音频。然后数据包在目的地被接收,但是每个数据包可能采用完全不同的路由,甚至可能没有按照正确的时间顺序到达目的地。然后,从分组中提取数字语音数据,并组装成数字数据流。DAC将其转换回模拟电信号,驱动音频放大器,进而驱动一个扬声器,最终产生声音。
声音的
顶部加载CD播放器和外部数模转换器。
大多数现代音频信号以数字形式存储(例如MP3和光盘(Compact Disc的复数))并且,为了通过扬声器听到,它们必须被转换成模拟信号。因此,DAC出现在CD播放器,数字音乐播放器、和PC声卡。
高端产品中也有专业的独立DAC高保真度音响的系统。这些通常采用兼容的数字输出cd播放机还是敬业运输(基本上是没有内部DAC的CD播放器)并将信号转换成模拟信号线级输出,然后可以输入到放大器来驱动扬声器。
类似的数模转换器可以在中找到数字扬声器诸如通用串行总线扬声器,以及在声卡。
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