Patent ID: 7719615

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