Patent ID: 6636691
Filing Date: 2003-10-21
Classification: G11B,H04N

Abstract:
Apparatus for processing display control command sequences of a sub-picture unit in a video stream for displaying additional information on a display device, said apparatus having decoding means for the display control commands, the decoding means being designed to decode a set of basic display control commands, as well as a set of additional display control commands, in a display control command sequence, the display control commands of the set of basic display control commands being positioned at the beginning and the display control commands of the set of additional display control commands being positioned at the end of the display control command sequence separated by an end command, a display control command sequence having an address information item, which specifies the start address of the next display control command sequence;the decoding means being designed to decode the display control commands of the set of basic display control commands in a display control command sequence one after the other and being designed in such a way that when an end command is processed, they carry out a comparison of the address of the end command with the address information item regarding the start address of the next display control command sequence and identify, from the difference between addresses, whether the end command is additionally followed by at least one further display control command from the set of additional display control commands, and in that the decoding means are designed in such a way that they process the at least one further display control command of the set of additional display control commands if it has been identified that at least one further display control command additionally follows.