Apparatus and methods for providing close captioning in a digital program services delivery system

摘要

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.