理学 多媒体编码 释 pulse code modulation 脉冲编码调制 实现模拟信号数字化传输的编解码系统，是现代语音通信中数字化的重要编码方式。
网络与数据通信 有线网络 释文 pulse code modulation, PCM 脉冲编码调制
- environmental space design
- environmental space design techniques
- environmental space division
- environmental space form
- environmental space orientation
- environmental space type
- environmental standard management regulation
- environmental standards
- environmental standards management
- environmental standard system
- environmental state
- environmental state recognition
- environmental statistics
- environmental stress of swine building
- environmental structure
- environmental subsidy
- environmental suit
- environmental supervision
- environmental supervision and management on environmental construction projects
- environmental supervision of hydropower station
- environmental survey satellite
- Environmental Sustainability Index
- environmental symbol
- environmental system
- Environmental Systems Engineering