PICTURE AND WRITING TRANSMISSION DEVICE

PURPOSE:To easily discriminate only a corrected part, by reproducing only a corrected part which is different from a transmitted original, in a corrected original sent back from the receiving side. CONSTITUTION:In order to send back a corrected original to a transmission origin, it is set to a photoelectric converter 1b of the receiving side. As a result, a corrected picture and writing data A' is formed, and is sent back to the transmitting side. In the receiving side, this signal is decoded by a decoder 6b, the corrected picture and writing data A' is formed, also a synchronizing signal C is outputted to a storage device 8, and an original picture and writing data held in advance is outputted. Subsequently, exclusive OR of the original picture and writing data A from the storage device 8 and the corrected picture and writing data A' is taken by a gate 10, and a picture and writing data of only a corrected part is obtained.