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Word stock establishing method applied to SDI (Serial Digital Interface) HD video character superimposition and word stock device

A character superposition, high-definition video technology, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of insufficient refresh, complex design circuit, and inflexible application.

Inactive Publication Date: 2015-03-04
冯为心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if a complete font library is stored in a device, it will inevitably lead to high storage costs and complex design circuits; if the displayed content is completely solidified in the device, this will lead to inflexibility in application and frequent changes in characters It becomes difficult; if the dot matrix is ​​refreshed into the character overlay device through a computer or other communication equipment, the required amount of communication data is large, the refresh is not timely enough, and the equipment cost is also high
For some of the above problems, there is not yet a good specification and agreement in this field

Method used

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  • Word stock establishing method applied to SDI (Serial Digital Interface) HD video character superimposition and word stock device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a specific process for establishing a font library suitable for digital serial interface SDI (serial digital interface) high-definition video character overlay involved in the present invention, including the following steps:

[0027] (1) Determine what needs to be displayed.

[0028] What is displayed is usually application specific. The display content involved in a general application usually includes a Chinese character part, a symbol part, and a number or letter part. Among them, the number of Chinese characters is small, and most of them are titles, categories, units of measurement and other information.

[0029] (2) Divide the content to be displayed into Chinese characters, symbols and letters, and numbers.

[0030] Symbols and letters usually include any one or a combination of mathematical operation symbols, punctuation marks, format symbols, letters, spaces or other special symbols, numbers are Arabic numerals 0-9, and letters are E...

Embodiment 2

[0037] In this embodiment, a font library device suitable for digital serial interface SDI (serial digital interface) high-definition video character overlay is provided, which is characterized in that it includes the following modules:

[0038] Fixed area module, which is used to save part of the Chinese characters in the content to be displayed in a full-width character format in 64*64 dot matrix mode after deduplication;

[0039] The semi-variable area module, which is used to deduplicate the symbols and letters in the content to be displayed, and save it in a half-width character format in 32*64 dot matrix mode;

[0040] Full change area module, which is used to deduplicate the number part in the content to be displayed, and store it in a half-width character format in a 32*64 dot matrix mode;

[0041] The character output interface is used to extract the dot matrix information of the characters from the fixed area module, the semi-variable area module, or / and the full-var...

Embodiment 3

[0045]This embodiment provides an example of practical application to help better understand the principle of the font library established in the present invention. In the application that needs to superimpose characters on the high-definition video of the banking system, the Chinese characters used are relatively fixed, such as "counter number", "money number", and "Zhang" only applied, through these Chinese characters and numbers 0123456789, as well as spaces and ":" to display the required content on the high-definition video. The specific font design is as follows: "0123456789" is a full-variable area, spaces and ":" are semi-variable areas, "counter number and money" is a fixed area, the full-variable area and semi-variable area adopt half-width character format, and the fixed area adopts full-width character format. Using this font library, characters in the following formats can be superimposed on high-definition videos:

[0046] Counter number: 28 Number of sheets: 2...

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Abstract

The invention provides a word stock establishing method applied to SDI (Serial Digital Interface) HD video character superimposition and a word stock device. The method comprises the following steps of removing repeated Chinese characters to form a fixed word stock area, and storing in a full-width character format by a 64*64 dot-matrix mode; removing repeated symbols and letters to form a half variable word stock area, and storing in a half-width character format by a 32*64 dot-matrix mode; removing repeated numbers to form a full variable word stock area, and storing in a half-width character format by a 32*64 dot-matrix mode. With the adoption of the word stock establishing method and the word stock device, the created word stock meets the service application, the design difficulty at HD character superimposition and the product cost are reduced, and a chip resource can be reasonably utilized well.

Description

technical field [0001] The invention relates to the field of video character overlay, in particular to a font library establishment method and a font library device suitable for digital serial interface SDI (serial digital interface) high-definition video character overlay. Background technique [0002] Relying on the development of chip technology and the characteristics of high fidelity and low delay, the SDI high-definition video transmission system has become more and more popular and applied; in the process of SDI high-definition video transmission, the demand for character superposition of high-definition video has also become very high. urgent. The character dot matrix used for superimposition of high-definition characters has higher requirements, and generally adopts 64*64 dot matrix, or even larger. Therefore, if a complete font library is stored in a device, it will inevitably lead to high storage costs and complex design circuits; if the displayed content is comp...

Claims

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Application Information

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IPC IPC(8): H04N5/265H04N5/445H04N7/18
Inventor 冯为心
Owner 冯为心