Mobile telephony service system and method thereof for terminal with h.264 codec

The video phone service system and method of the video telephone terminal with a built-in H.264 codec is disclosed. For this purpose, video call service method including the H.245 negotiation (Negotiation) process, (a) step of the originating terminal sends an H.245 negotiation (Negotiation) message which contains its own codec information to the receiver terminal; And (b) by a step which the receiving terminal sends a response to the H.245 negotiation (Negotiation) message on the basis of the codec information of the own codec information and the calling terminal to the calling terminal, and the conventional videophone It provides a videophone service continuity between the high quality picture phone, when providing a video call service to the quality of an existing video call terminal, due to the expansion of the video telephone network in accordance with the increase of the capacity of the video telephone network twice subscriber by expanding the pool (pool) contributes to activate video telephony service. Videophone, H.264, Codecs, Call Processing