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。
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.
作为一种开放性的短距离无线通信技术，蓝牙技术将是家庭网络低速率数据传输的最佳解决方案。
As a short - range wireless communication technology, Bluetooth is one of the best solution to low - rate wireless HomeNet connection.
目前的中高压电力线载波通信的传输速率都很低，只能应用于低速的场合，用户容量有限。
At present, transmitting speed of medium and high voltage power line carrier is very low, and these kinds of carriers can be used only in low speed situation, and the number of user is limited.
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