Patent ID: 8988606
Filing Date: 2015-03-24
Classification: H04N

Abstract:
1. A method of transmitting a digital broadcast signal comprising: multiplexing video data, audio data, and supplementary data into MPEG2 transport stream, the supplementary data including an event information table (EIT) and a program map table (PMT), wherein the EIT or the PMT includes a caption service descriptor, wherein the caption service descriptor includes caption information indicating whether a digital television closed caption service is present in the video data or a line 21 closed caption service is present in the video data in accordance with electronic industry association (EIA) 708, wherein the caption service descriptor further includes information indicating the number of closed caption services present in associated EIT event, wherein the caption service descriptor further includes language information defining a language associated with the closed caption service, wherein the caption service descriptor further includes information indicating the closed caption service is formatted for displays with 16:9 aspect ratio, wherein the caption service descriptor includes a caption service number that is defined only when the digital television closed caption service in accordance with electronic industry association (EIA) 708 is present; and transmitting the digital broadcast signal.