Patent ID: 7522215

Claim:
A digital broadcasting receiver comprising: a demultiplexer configured to demultiplex a received broadcasting signal into video stream and supplementary information stream, the supplementary information stream including program map table (PMT) and Event information table (EIT); a controller configured to detect caption information from at least one of the PMT and the EIT, determine whether caption data in the video stream is analog caption data or digital caption data by using the detected caption information and output a control signal according to the detected caption information; a video decoder configured to decode video data from the video stream; a digital caption decoder configured to decode digital caption data according to the control signal; an analog caption decoder configured to decode analog caption data according to the control signal; and a video combiner configured to combine the decoded video data from video decoder with at least one of the decoded digital caption data and the analog caption data; wherein the caption information indicates whether a digital television closed caption service is present in the video stream or a line 21 closed caption service is present in accordance with electronic industry association (EIA) 708.