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Method for signal transmission through VGA (Video Graphics Array) interface

A VGA interface and signal transmission technology, which is applied in the field of signal transmission through the VGA interface, can solve the problems of increasing product cost and troublesome use, and achieve the effect of simplifying operation, reducing cost and increasing transmission function

Inactive Publication Date: 2012-12-12
WUHAN TONGNUO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current smart accessory application also needs to connect an additional audio cable, which increases the product cost and is also very troublesome to use

Method used

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  • Method for signal transmission through VGA (Video Graphics Array) interface
  • Method for signal transmission through VGA (Video Graphics Array) interface
  • Method for signal transmission through VGA (Video Graphics Array) interface

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Embodiment Construction

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0020] The transmission of RGB video signals through the VGA interface is well known to those skilled in the art. The VGA interface is a D-type interface that uses asymmetrically distributed 15pin connection mode, with 15 pins in total, divided into 3 rows, 5 in each row, used to transmit red, green, and blue analog signals and synchronization signals (horizontal and vertical signals) . Such as figure 1 As shown, the interface definition corresponding to the 15-pin of an existing VGA interface is as follows:

[0021] Feet definition

[0022] 1 Red input signal

[0023] 2 Green input signal

[00...

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PUM

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Abstract

The invention relates to a method for signal transmission through a VGA (Video Graphics Array) interface. The method comprises the following steps of: transmitting RGB (Red-Green-Blue) video signals through a video data pin of the VGA interface; transmitting left channel audio signals through either a vacant fourth pin or a vacant eleventh pin of the VGA interface; and transmitting right channel audio signals through the other one of the vacant fourth pin and the vacant eleventh pin of the VGA interface. According to the method, the audio signal transmission function is added through redefining the VGA interface under the premise that the video signal transmission of the VGA interface is not affected, and then, one audio wire can be reduced for the connection between devices, so that the cost is lowered and the operation is simplified.

Description

Technical field [0001] The present invention relates to video and audio transmission, and more specifically, to a method for signal transmission through a VGA interface. Background technique [0002] VGA (Video Graphics Array) is a commonly used video transmission standard. It has the advantages of high resolution, fast display rate, and rich colors. It has been widely used in the field of color displays. [0003] With the emergence of intelligent demand for display terminal products such as displays and televisions, the intelligent functions of these display terminal products are modularized as an accessory for non-smart displays. At present, most smart accessories are connected to a monitor or TV through a VGA interface to transmit video signals, and at the same time, they are connected to a monitor or TV through another audio interface to transmit audio signals. Therefore, the current smart accessory applications also need to connect an audio cable, which increases the cost of ...

Claims

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Application Information

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IPC IPC(8): H04N5/765H04N5/775
Inventor 刘建华
Owner WUHAN TONGNUO ELECTRONICS CO LTD
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