Abstract: An image data producing apparatus for bit-developing processed image data includes a system processing memory and an variable capacity image data memory for storing bit-developed image data; control means is also included for changing the storage capacity of the image data memory.

Abstract: A first pictorial communication apparatus for transmitting and receiving a pictorial signal and a sound signal through a first channel and a control message through a second channel, having a line interface for communicating with ISDN, a video codec portion for coding and decoding of the pictorial signal, a key input portion and a camera, further comprises a character storing portion for storing character codes in corporation with the key input portion, a data conversion portion for converting character data train read from the character storing portion into a character video signal. On arrival of a call in an automatic answering mode, the character data train is read and transmitted through the first channel in place of a video signal from the camera after the conversion. The second apparatus has similar structure.