To provide a data communication system capable of transferring the ambience of a transmission source.

The data transmission terminal includes an audio information generation means for generating audio information; a board on which depiction can be made with a writing material; a position detection means for detecting positions of the writing material moving on the board surface; an image rendering information generation means for generating image control information, thereby rendering the image according to the positions detected by the position detection means; a generation means of sound effect control information for generating sound effect control information instructing sound effect control; and a transmission means for transmitting the audio information, the image control information, and the sound effect control information.

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