Patent ID: 8374486

Claim:
A method of reproducing text subtitle streams using a data processing apparatus, the method comprising: receiving, by the data processing apparatus, at least one text subtitle stream from an external source, each text subtitle stream including a style segment defining at least one region style, a first presentation segment, and at least one second presentation segment following the first presentation segment, each of the first and second presentation segments containing a palette update flag and at least one region of text, the palette update flag indicating whether to use palette information in the style segment or palette information in the corresponding presentation segment, each region of text being linked to one of the at least one region style defined in the style segment; and controlling, by the data processing apparatus, a fade-in/fade-out of a presentation of each presentation segment by using one of the palette information in the style segment and the palette information in the corresponding presentation segment according to a value of the palette update flag.