| 摘要 |
PURPOSE: An intelligent image telephone enables to transfer at least the important data although transfer speed of a communication line get low so that a receiving-side can confirm an originating-side. CONSTITUTION: An intelligent image telephone includes an encoder/decoder(3, 5) which encodes/decodes the data according to the transmitting speed. Thus, the encoder/decoder(3, 5) encodes/decodes all objects of all data packets when the transmitting speed is in an optimum state, however, the encoder/decoder(3, 5) encodes/decodes only important object when the transmitting speed is in the worst state. In case of voice data, the important object is a value sampled at specific intervals, and means the amount of data by which a receiving person can only distinguish an originating person's voice. Each voice data packet is a data sequence in which the important portion meaning the important object of the data and a plurality of supplementary portions meaning the less important objects are arranged in order. In case of image data, each image data packet is a data sequence in which the important character portion and the less important background portions are arrayed in order. Therefore, the receiving-side can distinguish the important voice and image although the transfer speed gets low.
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