Character display circuit and method for superimposing character code during blanking period of video signal

摘要

A character display circuit in which a circuit (1, 9, 10, 11, 12, 13, 14, 16; 22) for generating a character display timing signal in synchronism with vertical and horizontal synchronizing signals controls the frequency for dots constituting a character font such that it is integer multiple of the frequency for bits of a caption code, character coded data conforming to a format of the caption code is generated (2, 7, 8; 22) in synchronism with a predetermined horizontal synchronizing signal during the blanking period of a video signal, and coded data is superimposed (11; 23, 29, 30) on the video signal.