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Closed-caption broadcasting and receiving method and apparatus thereof suitable for syllable characters

  • US 6,256,072 B1
  • Filed: 05/05/1997
  • Issued: 07/03/2001
  • Est. Priority Date: 05/03/1996
  • Status: Expired due to Term
First Claim
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1. 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; and

    coding 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.

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