VIDEO TELECOMMUNICATION SYSTEM AND METHOD

摘要

An image communication system and method by which an effective reference image is always stored in a (frame) memory even when the arrival of a signal at an image transmitting side from an image receiving side is delayed or an error exists in a signal reporting a reception error. In the method, the writing of encoded image data in a memory section is controlled based on the content of the signal received from the image receiving side. The control includes the judgment whether or not new data are to be written, determination of the writing position in the memory section, and erasure of already written data in the memory section. It is preferable to erase reference images older than that corresponding to the correctly received last encoded image data and the reference image corresponding to the encoded image data including a reception error reported from the image receiving side from the memory section to reduce the scale of the memory section. <IMAGE>