Patent US 8,437,599

A method of reproducing text subtitle streams, the method includes receiving at least one text subtitle stream from an external source, each text subtitle stream including a style segment defining a group of region styles and presentation segment, each presentation segment containing at least one region of text linked to a selected one of the group of region styles, wherein a current presentation segment contains a continuous presentation flag to indicate whether the continuous presentation is required between current presentation and previous presentation; and decoding the text subtitle stream using the presentation segment defining the continuous presentation flag.