Apparatus for generating OSD pattern

A pattern generation and pattern technology, applied in image communication, cathode ray tube indicator, TV and other directions, can solve the problems of transmission, inability to superimpose OSD menus, etc., to reduce costs and achieve the effect of color display

Inactive Publication Date: 2008-12-24
深圳市菲特数码技术有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the video system in the prior art cannot superimpose the OSD menu into the CVBS video signal for transmission, it is necessary to provide an OSD pattern generating device

Method used

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  • Apparatus for generating OSD pattern

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Embodiment Construction

[0009] FIG. 1 is a schematic diagram of an OSD display device according to an embodiment of the present invention. The OSD display device includes an analog front end (Analog Front End, AFE) 21, an analog-to-digital converter (Analog / Digital Converter, ADC) 22, an automatic gain control module (Automatic Gain Control, AGC) 23, a synchronous signal separation module 24. A signal modulation module 25, an OSD generation module 26, a pattern synthesis module 27, and a digital / analog converter (Digital / Analog Converter, DAC) 28 .

[0010] The analog front end 21 is used to adjust the received CVBS image signal, and adjust the CVBS image signal to an optimal signal. The analog-to-digital converter 22 is connected with the analog front end 21, and is used for converting the CVBS image signal adjusted by the analog front end 21 into a digital CVBS image signal. Automatic gain control module 23 is connected with analog-to-digital converter 22 and analog front end 21, and it can receiv...

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Abstract

The invention relates to an OSD pattern generation device which comprises: an analog-digital converter for converting CVBS image signals in the analog form to the CVBS image signals in the digital form; a synchronous signal separation module for separating synchronous signals from the CVBS image signals in the digital form; an OSD generation module for generating OSD pattern signals; a signal modulation module for modulating the OSD pattern signals to the OSD pattern signals which are synchronous with the image signals and have the CVBS format according to the synchronous signals; and a pattern synthesis module for overlapping the CVBS image signals in the digital form and the OSD pattern signals in the CVBS format. The OSD pattern generation device of the invention has the advantages of low cost.

Description

【Technical field】 [0001] The invention relates to an OSD pattern generating device. 【Background technique】 [0002] With the development of electronic technology, various video devices have gradually entered people's lives, and these video devices are equipped with CVBS input or output interfaces, and video signals are mostly transmitted by CVBS signals between these devices. [0003] In the video transmission system, when the input and output of a certain device are video signals, various control operations need to be performed on the device, such as controlling the lens, motor, tuner, shutter and other devices. During operation, an OSD (On Screen Display) signal needs to be superimposed on the video signal, and transmitted to the display terminal in CVBS format, so as to realize man-machine dialogue during operation. [0004] However, in the current video transmission system, the OSD signal is generated in the terminal display device, and there is no special device for su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/445G09G5/00
Inventor 李问杰刘欣
Owner 深圳市菲特数码技术有限公司
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