Patent ID: 6253025
Filing Date: 2001-06-26
Classification: G11B,H04N

Abstract:
A recording medium for recording at least one sub-picture packet having a packet header and a packet data portion containing a sub-picture that is simultaneously reproducible with a main picture, said recording medium comprising:packet header information disposed in said packet header;sub-picture data representing a content of said sub-picture to be displayed;display control sequence information that indicates an order of display control for said sub-picture;sub-picture data unit header information including information identifying a size of a sub-picture data unit used to generate said sub-picture and which is defined by contents of said packet data portion of said at least one sub-picture packet add information identifying a recorded position of said display control sequence information in said sub-picture data unit; andplayback time information for determining a playback time of said sub-picture, said playback time encoded into said at least one sub-picture pack,wherein said at least one sub-picture packet is prepared so as to include at least said packet header information in said packet header, andwherein said sub-picture data, said display control sequence information, and said sub-picture header information are provided in said packet data portion of said at least one sub-picture; packer.