The audio interface of the low-speed communication module is connected to the audio interface channel existing on the tactic data terminal and is connected to the radio station.
低速通信模块的音频接 口连接战术数据终端原有的音频接口通道并与电台相连。
2
It is difficult to transmit the video data in low-speed narrow-band wireless channel and guarantee the subjective quality of video image during video communication.
在低速率的无线信道上传输视频数据，并保证视频图像的主观质量是视频通信的难点。
3
Convolutional code is still the channel coding in lowspeeddata transmission services in 3g.