| 摘要 |
<p>When transferring data between a server device and a client device or between communication terminals, the data transfer rate is set in accordance with a usable bandwidth and the data application so as to cause no unnecessary portion in a network. A control unit detects a packet loss generated upon a data transfer. When a packet loss is detected, the control unit selects a compression mode of a low data transfer rate. On the other hand, even when no packet loss is caused, the time required for data transfer (reciprocation delay time) is measured. When the reciprocation delay time is sufficiently small, a compression mode of a high data transfer rate is selected. The compression mode can be selected by switching to other codec or modifying the compression rate set in the codec, for example.</p> |
