Patent ID: 6256072
Filing Date: 2001-07-03
Classification: G09G,H04N

Abstract:
A closed-caption broadcasting method for a television image signal comprising the steps of:receiving additional information unrelated to a video portion of said television signal;checking whether word information related to a video portion of said television image signal has been received;selecting said word information if said word information has been received, and selecting said additional information if said word information has not been received;generating character information and control information from said selected information;producing a control code of two words by combining said control information with a first mode control bit and a first parity bit, and a character code of two words including a syllable character completion type code by combining said character information with a second mode control bit and a second parity bit;digitally-modulating said control code and said character code to generate a digital-modulated caption signal; andcoding said caption signal in at least one line of said television image signal which does not affect said television image signal to transmit said caption signal.