4. A method for reproducing a text subtitle stream, the method comprising: preloading at least one text subtitle stream into a buffer, the text subtitle stream including a style segment and at least one presentation segment, the style segment defining region style information including a default style to be applied to a text subtitle region by default, and the presentation segment including text data to be displayed within the text subtitle region of a display screen and inline style information to be applied to a specific portion of the text data which overrides the region style information, wherein, the presentation segment is linked to the region style information defined in the style segment by an identifier, and the text data included in the presentation segment is linked to at least one region style specifying a same text flow, the same text flow indicating at least one of character progression and line progression; and decoding the text subtitle stream by using the at least one of the region style information and the inline style information, wherein a current presentation segment contains a continuous presentation flag to indicate whether continuous presentation is required between the current presentation segment and a previous presentation segment.
4. A method for reproducing a text subtitle stream, the method comprising: preloading at least one text subtitle stream into a buffer, the text subtitle stream including a style segment and at least one presentation segment, the style segment defining region style information including a default style to be applied to a text subtitle region by default, and the presentation segment including text data to be displayed within the text subtitle region of a display screen and inline style information to be applied to a specific portion of the text data which overrides the region style information, wherein, the presentation segment is linked to the region style information defined in the style segment by an identifier, and the text data included in the presentation segment is linked to at least one region style specifying a same text flow, the same text flow indicating at least one of character progression and line progression; and decoding the text subtitle stream by using the at least one of the region style information and the inline style information, wherein a current presentation segment contains a continuous presentation flag to indicate whether continuous presentation is required between the current presentation segment and a previous presentation segment. 6. The method of claim 4 , wherein the continuous presentation flag is set to “1” to indicate that continuous presentation is required for the current presentation segment with the previous presentation segment.