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下面介绍的是一种专业用的新型脉码调制(PCM)录音机。它能记录和重放8个通道,是1973年9月出版的JAES杂志(第21卷,第7期)所介绍的系统的改进型。这两个系统是兼容的,都采用4磁头低载频录象机作为记录系统的机械部分。新系统的特点是:采用了加重电路和14比特A/D和D/A转换来改进系统的动态范围,有高质量复制数字数据的选择电路,可用两台录象机同PCM转换器一起进行同步记录。工程质量考虑和性能数据详述如下。
The following is a professional use of new pulse code modulation (PCM) recorder. It can record and replay eight channels, an improvement of the system described in JAES Magazine, Vol. 21, No. 7, September, 1973. Both systems are compatible and use a 4-head, low-carrier video recorder as the mechanical part of the recording system. The new system features an accelerometer and 14-bit A / D and D / A conversion to improve the dynamic range of the system, a high-quality digital data selection circuit that can be used with both recorders and PCM converters Synchronous recording. Engineering quality considerations and performance data are detailed below.