Method of raster-scan search for multi-region on-screen display and system using the same
AssigneeALi Corporation
InventorsChia-Ching Lin, Fu-Chung Chi
Life of this patent
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Abstract
A method of raster-scan search for multi-region OSD and a system using the same are provided. The multi-region OSD is to be displayed on a screen after an alpha-blending of a mixer. The method includes at least following procedures. First, a global header search is executed in the first memory module for each or a portion of a plurality of search lines so as to determine a blending region and store header addresses of OSD regions in a second memory module. Next, whether there is a dummy region at the search line is determined. In addition, an alpha value for the dummy region, a dummy data of the dummy region and the OSD data of the OSD regions at the search line are transmitted to the mixer.
Claims20
A method of raster-scan search for multi-region On-Screen Display (OSD), wherein the multi-region OSD is to be displayed on a screen after an alpha-blending of a mixer, the method comprising:
- executing a global header search in a first memory module for each or a portion of a plurality search lines, wherein the first executed global header search of OSD regions in the first memory module is used to determine a blending region and to store header addresses of the OSD regions in a second memory module;
- determining a dummy region at the search line;
- and
- transmitting an alpha value for the dummy region, a dummy data of the dummy region, and OSD data of h OSD regions at the search line to the mixer when a dummy region at the search line is determined, wherein h is the number of the OSD regions at the search line.
A raster-scan system for multi-region On-Screen Display (OSD), wherein the multi-region OSD is to be displayed on a screen after an alpha-blending of a mixer, wherein OSD headers and OSD data of a plurality of OSD regions are stored in a first memory module, and the mixer executes the alpha-blending of the OSD data from the raster-scan search system for the multi-region OSD and a main image data from a main image processing unit, the raster-scan search system comprising:
- a global header search module, configured for executing a global header search in the first memory module for each or a portion of a plurality of search lines, used to determine a blending region and to store header addresses of the OSD regions in a second memory module;
- a dummy region determination module configured for determining a dummy region at the search line;
- a blending region data output module configured for transmitting an alpha value for the dummy region, a dummy data of the dummy region, and the OSD data of the h OSD regions at the search line to the mixer when a dummy region at the search line is determined, wherein h is the number of the OSD regions at the search line;
- and
- a processor configured to execute and to coordinate the global header search module, the dummy region determination module, and the blending region data output module.
Dependencies are inferred from the claim text.