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前言自从日本NHK技术研究所在世界上最早研制出PCM录音机以来,到今年正好十年了。十年中,PCM技术和数字技术有了显著的发展,例如在广播方面,试制了时基校正器、帧同步器、标准电视信号制式转换装置、ESS、数字式VTR,在传输方面,普及了PCM-24(大城市近郊),研制了宽频带PCM
Preface Since the first NHK Institute of Technology in Japan developed the PCM recorder in the world, it is just ten years this year. In the past ten years, there have been notable developments in PCM technology and digital technologies. For example, in broadcasting, trial-produced time base correctors, frame synchronizers, standard television signal conversion devices, ESSs, and digital VTRs have been popularized PCM-24 (suburban metropolis), developed a wideband PCM