| 摘要 |
A memory structure and method for implementing an on screen display (OSD) is disclosed. The present invention separates a command area, which stores small but frequently updated data causing fatal errors due to erroneous read, from a bitmap area, which stores relatively larger data, less frequently updated than the command area and which is not sensitive to errors. Thus, OSD memory structure and method allows an external host processor to effectively control the OSD process. Also, the command area further comprises a global command and a plurality of local commands, wherein the global command contains common control information to the local commands and control information other than OSD information, thereby allowing the external host processor to effectively control the OSD even when implementing multistandard OSD where a plurality of bitmap and commands for these bitmap are constructed in an external memory.
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