Apparatus and methods for providing close captioning in a digital program services delivery system
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United States of America Patent
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Aug 1, 1995
Issued Date -
N/A
app pub date -
Jul 14, 1994
filing date -
Jan 21, 1993
priority date (Note) -
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Abstract
An apparatus for providing close captioning in a digital program services delivery system comprises: a rate converter circuit for receiving video codes and outputting video data; a video decoder circuit for receiving the video data and outputting digital Y, U, V data; a digital to analog converter/analog encoder circuit for converting the Y, U, V data into an analog video signal in a prescribed format; a line 21 former circuit for receiving close captioning digital data and forming a line 21 analog signal; and a multiplexor for inserting the line 21 analog signal into the analog video signal.
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