压缩数字传输 digital transmission: 数字信息传输; 语音信号数字传输compressed digital video: 压缩数字视频digital compressed image: 数字压缩图像baseband digital transmission: 基带数字传输cyclic digital transmission: 循环数字传递; 循环数字传送下载手机词典可随时随地查词查翻译