Method and device for encoding and decoding alpha channel data in osd
Active Publication Date: 2020-02-04
HISENSE VISUAL TECH CO LTD
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However, with the increase of OSD display content, the amount of OSD data of the bitmap type OSD is getting larger and larger. During the process of OSD controller 102 transmitting OSD data to OSD display buffer 104 through the transmission bus 105, due to the bitmap type The OSD data of OSD has a large amount of data. When transmitting the OSD data of bitmap OSD, it will occupy the bus bandwidth of the display device, which will affect the overall performance of the display device and may affect other modules. The use of the bus, resulting in processing delays, data blocking, and data loss of other modules
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[0029] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0030] At present, the OSD (On Screen Display, screen adjustment menu) debugging method is usually to display the menu of various adjustment item information on the monitor, and to make the display device reach the best display state by adjusting various work indicators in the OSD menu. In order to present the effect of multi-color display, the display device usually uses a bitmap OSD that recor...
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The invention relates to a method and device for coding and decoding alpha channel data in OSD, relating to the field of display terminal technology. The method comprises the following steps: presetting multiple compression modes according to the distribution of all alpha channel data, and determining the parameter value of each compression mode according to the target alpha channel data; separately compressing the parameter value of each compression mode, and decompressing the compressed parameter values; reconstructing the alpha channel data according to the decompressed parameter values and the corresponding compression modes; and taking the target compression mode and the parameter value of the target compression mode as the coding information of the alpha channel data, wherein the alpha channel data reconstructed by using the target compression mode has the highest matching degree with the target alpha channel data. According to the method and device disclosed by the embodiment of the invention, the occupation of bus bandwidths can be reduced, the possibility of affecting the use of other modules on a transmission bus can be reduced, and the performance of display equipment can be improved.
Description
technical field [0001] The present invention relates to the technical field of display terminals, in particular to a method and device for encoding and decoding alpha channel data in an OSD. Background technique [0002] The OSD (On Screen Display, screen adjustment menu) debugging method is usually a menu that displays information on various adjustment items on the display. The user adjusts various working indicators of the display through the menu, such as color, mode, and geometric shape. In this way, the display device can achieve the best display state. [0003] figure 1 It is a structural schematic diagram of a display device. Such as figure 1 As shown, the display device includes: a processor 101 , an OSD controller 102 , a memory 103 , an OSD display buffer 104 and a transmission bus 105 . Wherein, the OSD controller 102 is respectively connected to the processor 101 , the memory 103 and the OSD display buffer 104 through the transmission bus 105 . figure 1 The ...
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IPC IPC(8): H04N5/445H04N21/431H04N21/4402
CPCH04N21/431H04N21/4402H04N21/47
Inventor 王中琦田广钟声
Owner HISENSE VISUAL TECH CO LTD