SERVICE PROVIDING METHOD AND SERVICE PROVIDING APPARATUS FOR GENERATING AND TRANSMITTING A DIGITAL TELEVISION SIGNAL STREAM AND METHOD AND RECEIVING MEANS FOR RECEIVING AND PROCESSING A DIGITAL TELEVISION SIGNAL STREAM

摘要

A service providing method and apparatus that generates and transmits a digital television signal stream, by providing at least one downscaled sub picture service stream having a resolution equal to or less than the resolution of the standard definition television SDTV format, and multiplexing the at least one downscaled sub picture service stream in one transport stream and transmitting said transport stream to a receiving means. A receiving method and apparatus process a digital television signal stream, whereby the transport stream has multiplexed thereto at least one downscaled sub picture service stream having a resolution equal to or less than the resolution of the standard definition television SDTV format, by receiving the transport stream, separating the at least one downscaled sub picture service stream, and displaying on a display the at least the downscaled sub picture service stream according to predefined or user defined display parameters.