| 摘要 |
PURPOSE:To shorten the time of holding a transmission line and to improve the efficiency of the use of the line by receiving respective information of the reception code storage capacity of a receiver, its longest processing time and its transmission rate by a transmitter, operating a prediction for the adding condition of a supplementary code by using the above-said information, and thus making the code supplement finer. CONSTITUTION:The procedure signal reception circuit 11 of the transmitter receives procedure signals from the receiver. A reception signal storing circuit 12 temporarily stores these procedure signals. A receiver's function identifier circuit 13 takes out a terminal function confirmation information from among the received procedure signals, and identifies a reception code storage capacity, a longest processing time, and a transmission rate which are the function of the receiver. A code supplement instruction circuit 14 predicts the longest processing time from the receiver's function and the function of self-receiver, and predicts the amount of reception code storing in the receiver by using the transmission rate, the reception code storing capacity of the receiver, and the amount of coding of image signals for each scanning line obtained from a coding circuit 16, and calculates a code supplement condition, and outputs a transmission instruction for supplement code. The coding circuit 16 receives image signals, and encodes them into transmission codes, and at the same time adds supplementary codes under the instruction from the instruction circuit 14 in case the quantity of transmission codes is small.
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