Closed-caption broadcasting and receiving method and apparatus suitable for syllable characters
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United States of America Patent
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Oct 5, 1999
Grant Date -
N/A
app pub date -
May 5, 1997
filing date -
May 3, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A closed-caption broadcasting and receiving method and apparatus. According to the closed-caption broadcasting method and apparatus, first and second language character information and control information are inputted, and control codes of 2 words and character codes of 2 words including a syllable character completion type code are produced. The control codes are obtained by combining the control information with a mode control bit and a parity bit, and the character codes are obtained by combining the first and second language character information with a mode control bit and a parity bit, respectively. First and second digital-modulated caption signals are produced by inputting the control codes and the character codes, respectively. The first or second caption signal is selected if the present field is discriminated as an odd or even field, respectively, and the selected caption signal is encoded in a scanning line which does not affect a television video signal to be transmitted in the air.
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Family
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Cited Art Landscape
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