PURPOSE: A dynamic image transmission system, a transmission system for emergency medical care and a dynamic image transmitter are provided to reduce transmission band width without lowering the quality of a frame image, thereby realizing a dynamic image transmission system transmitting a frame image of high definition by using a transmission line of narrow transmission band width at low cost. CONSTITUTION: A dynamic image transmission terminal(1) transmits dynamic image data. A dynamic image receiving terminal(3) receives dynamic image data. A dynamic image transmitter(2) performs transmission of dynamic image data to the dynamic image receiving terminal from the dynamic image transmission terminal. The dynamic image data transmitted from the dynamic image transmission terminal are formed of a series of image frames generated at a predetermined frame rate, and each frame data is transmitted as one or two or more data packets. The dynamic image transmitter discards the data packets based on attribute data in the data packets received from the dynamic image transmission terminal, and reduces the number of packets. The dynamic image receiving terminal receives the reduced data packets from the dynamic image transmitter.
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