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前言音响设备越来越向高性能发展,PCM录音机和PCM唱片就是其中的一种实例,它使用了通信技术中广泛应用的PCM(脉冲编码调制)技术。人所共知,要把音频信号经过采样、量化变成PCM信号,不仅记录的信号频带要宽,而且为检出和校正比特误差还必须具有多余度,所以现有的音频信号录放装置在记录容量方面不能满足上述要求,
INTRODUCTION Audio equipment is increasingly being developed for high performance. One such example is the PCM recorder and PCM disc, which uses PCM (Pulse Code Modulation) technology, which is widely used in communications technology. It is well known that the audio signal should be sampled and quantized into a PCM signal. Not only the signal band to be recorded should be wide, but also an extra degree must be provided for detecting and correcting the bit error. Therefore, the existing audio signal recording and reproducing apparatus records, Capacity can not meet the above requirements,