It is arranged so that a summary of schematic images is promptly displayed even if a transmission speed is low. For that purpose, a numerical value indicating a reference resolution is substituted for a variable r. The current time is substituted for a variable t0, and data having a resolution of r is...http://www.google.de/patents/US6070195?utm_source=gb-gplus-sharePatent US6070195 - Image display device and method, and image communication apparatus and method