| 摘要 |
PURPOSE: A method for improving initial video quality in a video telephony system is provided to control a transmission period of an intra frame at a proper time point, thereby preventing loss of an intra frame generated due to difference of a possible data transmission time point between terminals. CONSTITUTION: A terminal A decides whether video data transmission is possible with a terminal B(S230). When video data transmission is possible between the terminal A and the terminal B, the terminal A changes a generation period of an intra frame(S240). The terminal A transmits the intra frame to the terminal B at the changed generation period(S250).
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