VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter

A signal converter and signal technology, applied in the multimedia field, can solve problems such as graphics card blind spots and graphics card incompatibility, achieve the effect of suppressing color unbalanced jitter and mismatch, and ensuring safe transmission

Active Publication Date: 2013-08-07
ZHEJIANG SHIP ELECTRONICS TECH
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AI Technical Summary

Problems solved by technology

[0002] At present, with the rapid popularization of TVs with high-definition digital interfaces and the rapid development of multimedia audio and video fields, more and more video signals need to be transmitted from host computers, notebook computers, home DVDs, home game consoles and other devices with VGA output interfaces. Linked to high-definition display devic

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  • VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter
  • VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter
  • VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter

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Embodiment Construction

[0017] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0018] In the figure, analog VGA video signal input 1; analog audio signal input 2; TMDS differential signal output 3; video signal conversion module 4; audio signal conversion module 5; HDMI video format conversion and HDCP decoding module 6; storage signal processor 7; Clamping controller 8; video automatic gain controller 9; analog-to-digital converter 10; video capture 11; color converter 12; low-frequency filter 13; audio automatic gain controller 14; digital decimation filter 15; device 16; audio signal capture 17; serial external storage 18; video analog-to-digital conversion serial register 19; HDMI configuration register 20.

[0019] Such as figure 1 , figure 2 as well as image 3 As shown, this VGA signal to ...

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Abstract

The invention belongs to the technical field of multimedia and provides a VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter which comprises an analog VGA video signal input, an analog audio signal input, a TMDS (transition minimized differential signal) output, a video signal converting module, an audio signal converting module, an HDMI video format converting and HDCP (high-bandwidth digital content protection) decoding module, a storage signal processor and the like. The VGA signal to HDMI signal converter mainly has the advantages that the problem of recognition of resolution ratio of different graphics cards is solved, signal correction and conversion are better realized, a method that automatic identification and correction are realized by externally storing parameter features of common graphics cards is adopted, the problem of blind areas of resolution converting of certain graphics cards is well solved, and analog-digital converting and automatic compensating functions can effectively inhibit nonequilibrium color jitter and mismatching.

Description

technical field [0001] The invention belongs to the technical field of multimedia, and relates to a VGA signal-to-HDMI signal converter, in particular to a VGA signal-to-HDMI signal converter which can automatically identify the resolution of a graphics card and has its own HDCP information processing. Background technique [0002] At present, with the rapid popularization of TVs with high-definition digital interfaces and the rapid development of multimedia audio and video fields, more and more video signals need to be transmitted from host computers, notebook computers, home DVDs, home game consoles and other devices with VGA output interfaces. Linked to high-definition display devices such as large-screen TVs and projectors, some existing converters will produce incompatibility with certain graphics cards during conversion. There are blind spots when converting the resolution of different graphics cards. Therefore, it is necessary to Developed a converter that can automat...

Claims

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Application Information

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IPC IPC(8): H04N5/765G09G5/00G06F3/14
Inventor 李志平赵晓青刘立辉
Owner ZHEJIANG SHIP ELECTRONICS TECH
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