Apparatus and methods for providing close captioning in a digital program services delivery system
AssigneeScientific-Atlanta, Inc.
InventorsGuy A. Primiano, Ajith N. Nair
Life of this patent
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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.
Claims13
An apparatus for providing close captioning in a digital program services delivery system, comprising:
- (a) a rate converter circuit receiving video codes and outputting video data;
- (b) a video decoder circuit, coupled to said rate converter circuit, receiving said video data and outputting digital component video data;
- (c) a digital to analog converter/analog encoder circuit, operatively coupled to said video decoder circuit, converting said component video data into an analog video signal in a prescribed format;
- (d) a line former circuit receiving digital text data and forming a line of analog text signal;
- and
- (e) a multiplexor, coupled to said digital to analog converter/analog encoder circuit and said line former circuit, inserting said line of analog text signal into said analog video signal.
Means for providing close captioning in a digital program services delivery system, comprising:
- (a) rate converter means for receiving discrete cosine transform (DCT) compressed video codes and outputting video data;
- (b) motion pictures expert group (MPEG) video decoder means coupled to said rate converter means for receiving said video data and outputting digital component video data;
- (c) digital to analog converter/analog encoder means operatively coupled to said MPEG video decoder means for converting said component video data into an analog baseband video signal in a prescribed format;
- (d) line former means for receiving digital text data and forming a line of analog text signal;
- and
- (e) multiplexor means, coupled to said digital to analog converter/analog encoder means and said line former means, for inserting said line of analog text signal into said analog baseband video signal.
A method for providing text insertion in a digital program services delivery system, comprising the steps of:
- (a) decoding discrete cosine transform (DCT) compressed video codes and generating video data corresponding thereto;
- (b) converting said video data into digital component video data;
- (c) converting said component video data into an analog baseband video signal in a prescribed format;
- (d) processing digital text data and forming a line of analog text signal representative thereof;
- and
- (e) inserting said line of analog text signal into said analog baseband video signal.
An apparatus for providing close captioning in a digital program services delivery system, comprising:
- (a) a video decoder circuit receiving encoded digital video data and outputting decoded digital video data;
- (b) a digital to analog converter/analog encoder circuit, operatively coupled to said video decoder circuit, converting said decoded digital video data into an analog video signal in a prescribed format;
- (c) a line former circuit receiving digital text data and forming a line of analog text signal;
- and
- (d) a multiplexor, coupled to said digital to analog converter/analog encoder circuit and said line former circuit, inserting said line of analog text signal into said analog video signal.
Means for providing close captioning in a digital program services delivery system, comprising:
- (a) motion pictures expert group (MPEG) video decoder means for receiving encoded digital video data and outputting decoded digital video data;
- (b) analog encoder means, operatively coupled to said MPEG video decoder means, for converting said decoded digital video data into an analog video signal in a prescribed format;
- (c) line former means for receiving digital text data and forming a line of analog text signal;
- and
- (d) means coupled to said analog encoder means and said line former means for inserting said line of analog text signal into said analog video signal.
A method for providing text insertion in a digital program services delivery system, comprising the steps of:
- (a) decoding encoded digital video codes and generating digital video data corresponding thereto;
- (b) converting said digital video data into decoded digital video data;
- (c) converting said decoded digital video data into an analog baseband video signal in a prescribed format;
- (d) processing digital text data and forming a line of analog text signal representative thereof;
- and
- (e) inserting said line of analog text signal into said analog baseband video signal.
Dependencies are inferred from the claim text.