RECORDING MEDIUM AND METHOD AND APPARATUS FOR DECODING TEXT SUBTITLE STREAMS

At least one text subtitle stream is recorded on a recording medium. Each text subtitle stream includes a dialog style segment defining a set of region styles and at least one dialog presentation segment. Each dialog presentation segment contains at least one region of dialog text and being linked to at least one of the set of region styles. The dialog style segment includes a player style flag which indicates whether a player is permitted to generate its own set of player styles. Then each dialog presentation segment is decoded using the set of player styles if the permission is indicated by the player style flag.