Patent ID: 8429532

Claim:
A method of reproducing text subtitle streams, the method comprising: reading at least one text subtitle stream including a style segment and a plurality of presentation segments to which the style segment is applied, the style segment being included in a first packet of the text subtitle stream, the presentation segments being respectively included in a plurality of packets which follow the first packet, the style segment including at least one set of style information, the at least one set of style information including region positioning information for positioning a region in an image, text box positioning information for positioning a text box in the region, and text flow information indicating character progression and line progression of text subtitle data, and each presentation segment including field information and at least one region subtitle, the field information including presentation start time and presentation end time of the corresponding presentation segment, each region subtitle including the text subtitle data and a region style identifier, the region style identifier identifying one of the at least one set of style information in the style segment to apply to the text subtitle data, identical text flow information being applied to each region subtitle in the corresponding presentation segment when the presentation segment includes a plurality of region subtitles; and decoding the at least one presentation segment based on the region style identifier of the at least one presentation segment.