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A test method and device for displaying data on a screen
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A test method and screen display technology, applied in the field of digital video, can solve the problems of cumbersome test process and low test efficiency, and achieve the effect of improving test efficiency
Active Publication Date: 2019-04-05
南京西觉硕信息科技有限公司
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[0004] It can be seen that the existing 2BPP OSD test method needs to draw a picture and use a conversion tool to generate 2BPP test data every time the test is performed. The test process is cumbersome, resulting in low test efficiency
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Embodiment 1
[0052] refer to figure 1 , which shows a flow chart of the steps of an embodiment of a test method for displaying data on the screen of the present invention, which may specifically include:
[0053] Step 101, receiving the text to be tested input by the user;
[0054]In the embodiment of the present invention, the text to be tested may include Chinese or English. In a specific application, a display interface can be added to the test system of the present invention, and the text to be tested input by the user can be received through the display interface. Of course, in practical applications, other parameter information input by the user may also be received through the display interface, such as the display position of the text to be tested, the character display width, and the character display height.
[0055] The test method for displaying data on the screen of the present invention can be specifically applied to various terminal devices with display functions, such as ...
Embodiment 2
[0078] refer to figure 2 , which shows a flow chart of the steps of an embodiment of a method for establishing an extended font library according to the present invention, which may specifically include:
[0079] Step 201, perform conversion processing on each dot matrix character according to the order of dot matrix characters in the existing standard dot matrix font library; wherein, the pixel of the converted character is represented by two bits;
[0080] In the embodiment of the present invention, the existing standard dot matrix font library is used to establish the extended font library in 2BPP format. Wherein, the dot matrix font library is a data file, in which dot matrix data of all characters are stored, and one pixel of the dot matrix data is represented by 1 bit. For example, in the dot matrix font library of Chinese characters, each bit (bit) of each byte represents a point of a Chinese character, and each Chinese character is composed of a rectangular dot matri...
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Abstract
The embodiment of present invention provides a testing method and device capable of displaying data on a screen. The method comprises the steps: receiving a to-be-tested text inputted by a user; reading dot matrix information, corresponding to characters in the to-be-tested text, in a pre-set expanding word stock; and overlaying the dot matrix information to a video image for display, wherein pixels of the characters in the expanding word stock are shown by two bits. By adopting the embodiment of present invention, when 2BPP OSD data test is performed, the constructed expanding word stock can be reused, so that testing data is not generated, and the testing efficiency is greatly increased.
Description
technical field [0001] The invention relates to the technical field of digital video, in particular to a testing method and device for displaying data on a screen. Background technique [0002] OSD (on-screen display, on-screen display) is mainly used to superimpose text information on the video image, such as time, place, etc., so as to provide more additional information for the video content, which can be used as a description and supplement of the video image, for example, it can Time information is superimposed on the display screen of the monitoring device. 2BPP is a common OSD data format. BPP (BitPer Pixel, pixel depth) refers to the number of bits used to store each pixel. Specifically, 2BPP refers to the representation of each pixel by 2 bits. [0003] In practical applications, it is necessary to test the 2BPP OSD text information displayed by the monitoring equipment to verify whether the expected display effect is achieved. At present, the method of 2BPP OSD t...
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