(under the class definition) Subject matter involving a periodic or selective transmission of single video frames during a period greater than the period required for a portrayed motion.
(1) Note. A portrayed motion requires at least 8 frames per second. In a television system, 25 or 30 frames per second are mostly used.
(2) Note. A system included herein is normally intended for use with a telephone system, but the telephone system is not claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17, for two way conversational television systems which may use a slow scanning transmission technique, and see particularly subclass 18 for a still frame transmission.
SEE OR SEARCH CLASS
358, Facsimile,
500+, for color facsimile scanning and subclass 479 for facsimile video scanning,.
