TW524017B - On screen display (OSD) method of video device - Google Patents

Abstract

The present invention provides an on screen display (OSD) method of video device. The method includes the following steps: calculating the average RGB (red, green, and blue) total pixel luminance in the image signal display area of a to-be-displayed OSD; comparing to determine the default luminance level interval for the average RGB total pixel luminance in the image signal display area; selecting an average OSD luminance so that there is a high luminance contrast between the OSD and the image signal display area; and displaying the OSD on the image signal display area.

Description

524017 V. Description of the invention (1) The present invention relates to a 0SD display method of a video device, and in particular to a 0SD display method applied to a video device. The display of the 0SD can be compared with the color and brightness of daylight. , And change the color or brightness of the 0SD display. According to the conventional technology, on the display of 0 SD (0 n S cree η D isp 1 ay) on a video device, a variety of technologies have been developed, such as US Patent No. 5,6 3 1,7 1 1, which is used by The time-sharing technique mixes the display screen of the 0SD with the background image. However, it fails to solve the phenomenon that the information displayed on the 0SD is not easily distinguished when the color of the 0SD is similar to the background image.

Another example is U.S. Patent No. 6,09,4,59. This invention cuts out part of the background and replaces it with the 0SD display day surface. This invention also cannot solve the problem of indistinguishability when the OSD color is similar to the background. Therefore, in order to solve the above-mentioned problems, the present invention proposes a video device OSD display method by the following steps: First, calculate an average RGB sum of daylight brightness of an image signal display area to be displayed with 0SD to be displayed; compare What is the preset brightness level interval for the average RGB sum of daylight brightness of the image signal display area; choose an average brightness of 0SD to make the 0SD contrast with the image signal display area with high brightness; make the OSD display in The image signal is displayed on the area.

In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, the following describes specific embodiments in combination with the accompanying drawings, as follows: Embodiments

Page 4 524017 V. Description of the invention (2) Refer to the first picture. The first picture is to select an SD signal display area to be displayed in a display day and display the OSD and image screen in this area. The image signal display area selected in 1 1 2 1 0 or 0SD information 1 1 4 and other pictures are combined by day pixels (pixels), and each day pixel is stored in the video display circuit to indicate that day The value of the brightness and color of the element. The video display circuit can display the screen according to the content to be displayed. As can be seen in the figure, the SD signal display area 1 1 0 is an image day surface 112. One of the selected regions, and the image signal display region 1 1 ′ of the 0SD to be displayed is used to display a 0SD information 1 1 4, wherein the 0SD information 1 1 4 may also be 0SD with or without a background. (For example, text or graphics, etc.) The diagram of the message diagram is the first of an embodiment of the present invention. Please refer to the section: W process diagram. First, the video display circuit (usually performed by the addition circuit of the video display circuit) is calculated. 0SD image signal display area to be displayed The average value of the RGB sum pixels in terms of their degrees; 〇; Obtain the average value of the preset pixel brightness and the adjustment value 20 in the 0SD area to be displayed; compare the average of the brightness of the RGB sum pixels in the image signal display area The value is compared with a preset brightness interval level 30. In this embodiment, the level interval is divided into a high brightness level interval, a low brightness level interval, and an intermediate brightness level interval. The daytime brightness level of the description is divided into ^ 0 ~ 2 5 5 and a total of 2 5 6 levels, then the intermediate brightness level interval can be set at: high brightness level interval is 139 ~ 2 55, and low brightness level interval video The display circuit then judges the digital average of the RGB sum pixels

Page 5 524017 V. Description of the invention (3) Which brightness level interval is 30, if it is a low brightness level interval, increase the average brightness of the 0 SD area to a preset value A (for example, the average brightness is 1 7 〇) 42 above, and display the 0SD on the image signal display area of the 0SD to be displayed 48, and finally the process ends 50; if the digital average of the r 〇B sum daylight is located in the high brightness level interval , Then lower the average brightness of the 0SD area to a preset value B (for example, the average brightness is 90) 46 and display the 0SE) on the image signal display area of the 0SD to be displayed 48, and finally make the process At the end of the 50% increase or decrease of the average brightness of the OSD area, it can be adjusted unidirectionally by brightness offset or bidirectionally adjusted by brightness. . If the digital average of the RGB sum pixels is in the middle brightness level range, please refer to the third figure to calculate the average brightness values Rbk, Rb, Gbk, Bbk76 'Is the average brightness value Rbk, G bk, B bk of each color more than R, G, b within the intermediate brightness level interval 78, if so, set the average brightness value of the OSD background color R to 255 ~ Rbk , The average brightness value of G is 255 > ~ Gbk and the average brightness value of B is 25 5 ~ Bbk80, if the average party value Rbk, Gbk, B bk of each color is outside the intermediate brightness level interval, then set the OSD The color is black or white 82; and 0SD is displayed on the image signal display area of the 0SD to be displayed 72, and finally the process ends 74, wherein, in this embodiment, the display pixel of the 0SD is the 0Sd The background area is calculated with the average brightness of the pixels in which the display information is incorporated. In addition, the video display circuit can be designed differently, and the video display circuit can also be directly calculated based on the size of the image signal display area of 0SD to be displayed. G B Sum The average value of the brightness of the daylight, and then select a background.

_ IBII Page 6 524017 V. Description of the invention (4) The average brightness of the scene, for this display architecture, it is not necessary to first obtain the preset average value of the day prime digits and the adjustment value 20 of the 0SD background area to be displayed. And directly determine which brightness level interval 30 the digital average of the RGB sum pixels is in. If it is a low brightness level interval, increase the average brightness of the OSD background area to a preset value A (for example, the average brightness is 1 7 0) above, and display the OSD background on the image signal display area of the OSD to be displayed 48, and finally the process ends 50; if the digital average of the RGB sum daylight is in the high brightness level range, let The average brightness of the OSD background area is below a preset value B, and the OSD background is displayed on the image signal display area of the OSD to be displayed 48, and finally the process ends 50; the second embodiment of the present invention is the The embodiment of OSD information display day element is not incorporated into the OSD background area. The embodiment of OSD information is displayed on the OSD background area. However, the aforementioned principle is still used to calculate the total RGB day of the OSD background area. The digital average value of the brightness is 60. In this embodiment, only the digital average value of the RGB sum pixels is located in the high-luminance level range and the low-luminance level range; please refer to the fourth figure, the fourth It is another embodiment of the present invention. First, the video display circuit calculates a digital average 60 of the brightness representation of the RGB sum pixels of an OSD background region, and then obtains the average daily brightness and adjustment value 62 of the OSD display information; and Compare the average value of the brightness of the RGB sum daylight in the OSD background area with a pre-set low-level brightness value or Brahmin level 6 4; when the digital average value of the RGB total day-light value is higher than the preset value When the brightness level is low, the average brightness of the OSD display information is increased to a preset value above X 66, so that the background area of the OSD and the image information of the OSD to be displayed

524017 V. Description of the invention (5) The display area has a high-brightness contrast; when the digital average of the RGB total and the day prime is lower than the preset level of the party ’s south level, 6 8 5 lowers the 0SD display information The average brightness is 70 below a preset value Y, so that the OSD background area has a high brightness contrast 72 with the OSD display information; and then the OSD display information 74 is displayed.

Please refer to the fifth diagram. The fifth diagram is an embodiment of the present invention before and after the OSD is combined with the background image. According to the present invention, the flowchart of the OSD display method in which colors are compared, the background display image 1 0 0 and the OSD background area 102, with the calculation, judgment and display process 104 of the OSD display mode switching / overlaying, opaque mode 106 for the OSD (OSD is black or white) or translucent mode 1 08 (OSD is non- Black and not white). In summary, although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Retouching, so the scope of protection of the present invention shall be determined by the scope of the attached patent application.

Page 524017 Simple illustration of the diagram Simple explanation of the diagram: Display 2 = select a 0SD image signal to be displayed in Shixian's daytime display: ⑽ or 'and display 〇SD in this area; Ϊ = picture system The first part of the flowchart of an embodiment of the present invention; f-the diagram is the flowchart of the second part of an embodiment of the present invention; = the four diagrams are the flowchart of another embodiment of the present invention; The five figures are examples of the embodiment of the invention before and after the SD and background image are combined: 佥 I ΐ Calculate the average value of the RGB sum of the day signal of the image signal display area of a 0SD to be displayed. The digital average value of the preset pixels in the 0SD background area displayed and a comparison of the R g B sum pixels of the image signal display area and the brightness of the f1 ^ average value and a preset brightness interval level 3 0 The average brightness of the 0SD background area to a preset value A42 Reduce the average brightness of the OSD background area to a preset value B or less 46 "Member " Xuan 0 ^ D month 豕 The image signal display on the 0 SD to be displayed On the area 48, the flow ends. 5 0 7 4 Differential 0SD background area R g B Sum Pixel brightness digital average value 6 0 Get the average brightness and adjustment value of pixel brightness of 0SD display information 62

524017 The diagram simply explains that the average value of the brightness of the RGB sum of the background area of the OSD background area is lower than the set low level value 6 4 Increase the average brightness of the 0SD display information to a preset value above X 6 6 Compare The average value of the brightness of the RGB sum in the 0SD background area is souther than the set exemption level. 68 Reduce the average brightness of the 0SD display information to a preset value below Y. 70 Display the 0SD display information on the 0SD background. Calculate the average brightness values of R, G, and B for each color of the image signal display area of the 0SD to be displayed on the area 72. Rbk, Gbk, and Bbk 76 Compare whether the brightness of each color of R, G, and B is in the middle brightness level range. In 7 8 words, the 0SD color is set to R-> 255 ~ Rbk G- > 255 ~ Gbk B- > 255 ~ Bbk 80 Set the OSD color to black or white 82 Background display image 1 0 0 0SD background area 1 02 Calculation, judgment and display process of switching / overlaying with 0SD display mode 1 0 4 0SD opaque 106 0SD translucent 1 08 Display 0SD image signal display area to be displayed 1 1 0 image day 1 1 2 0 SD information 1 14

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Claims (1)

524017 VI. Application for patent scope 1. A method for displaying 0SD of a video device, including the following steps: Calculating the average value of the RGB sum of the daylight brightness of a video signal display area to be displayed with 0SD; comparing the RGB sum of the daylight brightness of the image signal display area The average value is in the low-brightness level range or the high-brightness level range; an average brightness of 0SD is selected so that the 0SD has a high brightness contrast with the image signal display area; the 0SD is displayed on the image signal display area. 2. The video display device 0SD display method described in item 1 of the scope of patent application, wherein the OSD system includes 0SD background and 0SD information. 3. The video display device OSD display method described in item 1 of the scope of patent application, wherein the OSD is OSD information. 4. An OSD display method for a video device, including the following steps: Calculating the average RGB sum of the daytime brightness of a 0SD image display area to be displayed; obtaining a pixel average brightness value of 0SD and adjusting the index value; comparing the image The average RGB daylight brightness of the signal display area is in the low immunity level range or the South Brahmin level range. Adjust the OSD background index value so that the average brightness of the OSD and the brightness of the contrast area of the image have a high brightness. Compared; The OSD is displayed on the video signal display area. 5. According to the 0SD display method of the video device described in item 4 of the scope of the patent application, the adjustment of the average brightness of the 0SD area to be displayed can be adjusted unidirectionally by brightness offset. Page 11 524017 6. Scope of patent application 6. According to the OSD display method of video device described in item 4 of the scope of patent application, the adjustment of the average brightness of the OSD area to be displayed can be adjusted in two directions by gain. 7. The video display device 0SD display method as described in item 4 of the scope of the patent application, wherein the 0SD includes the 0SD background and OSD information. 8. The OSD display method of a video device as described in item 4 of the scope of patent application, wherein the 0SD is OSD information. 9. An OSD display method for a video device, comprising the following steps: Calculating an average RGB sum of daylight brightness of an image signal display area of an OSD to be displayed; comparing an average RGB sum of pixel brightness of the image signal display area at an intermediate brightness Level range; Calculate the average brightness value of R, G, and B colors of an image signal display area to be displayed on the OSD to be displayed; compare whether the average brightness values of each color of R, G, and B are at the intermediate brightness level Within the range; if yes, set the average brightness value of the OSD background color R to the maximum brightness value to the average brightness value of each color; if not, set the OSD color to black or white; make 0SD display on the image signal display area . 10. According to the OSD display method of the video device described in item 9 of the scope of the patent application, the adjustment of the average brightness of the OSD region to be displayed can be adjusted unidirectionally by brightness offset. 1 1. The OSD display side of the video device as described in item 9 of the scope of patent application Page 12 524017 VI. Application for Patent Scope Method. The adjustment of the average brightness of the OSD area to be displayed can be adjusted in two directions by gain. 1 2. The OSD display method of a video device as described in item 9 of the scope of patent application, wherein the OSD includes OSD background and OSD information. 1 3. The OSD display method of a video device according to item 9 of the scope of patent application, wherein the OSD is OSD information. Page 13