| 摘要 |
<p>An apparatus for generating a digital video picture is proposed. In this case, the video picture comprises a main picture and a secondary picture. The secondary picture serves to provide information about the status of the apparatus or else for operational guidance. The data of the picture are supplied digitally. Data for the subpicture are additionally contained in the bit stream for the main picture. The subpicture can likewise be displayed together with the main picture and provide information such as, for example, subtitles with respect to the main picture. Decoding apparatuses for the main-picture data and the subpicture data are provided. Also provided is a multiplexing device for the correctly timed outputting of the decoded data and, consequently, of the joint representation of main picture and subpicture. The apparatus has a storage device, in which data for the secondary pictures are stored in coded form. The coded data of a secondary picture are loaded into the decoding unit for the subpicture data in response to a received command. The decoding of the data for the subpicture is stopped and the decoding of the data for the secondary picture takes place instead. In a further refinement of the invention, provision is additionally made of a second subpicture decoding device, which is used for the decoding of the displayable secondary pictures. In this case, subpicture and secondary picture can then be inserted simultaneously in the video picture.</p> |
