Patent ID: 8711282

Claim:
A digital broadcasting receiver comprising: a demultiplexer configured to demultiplex a 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), wherein the PMT or the EIT comprises a caption service descriptor; a controller configured to detect caption information from the caption service descriptor, to determine whether caption data in the video streams is analog or digital, and to identify a caption service number corresponding to the caption data when the detected caption information indicates that the caption data in the video streams is digital; a video decoder configured to decode video data from the video streams; and a caption decoder configured to decode the caption data; wherein the caption information indicates whether a digital television closed caption service is present in the video streams or a line 21 closed caption service is present in the video streams in accordance with electronic industry association (EIA) 708, wherein the caption service descriptor comprises the caption service number corresponding to the caption data, and wherein the caption service number in the caption service descriptor is defined only when the digital television closed caption service is present.