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Single CAT5 net wire based KVM extender and realization method thereof

A realization method and extender technology, which are applied in the field of mouse signal, keyboard signal equipment and realization, long-distance transmission of video/audio signal, can solve the problem of no audio signal transmission of KVM extender, and achieve low cost and convenient signal transmission Effect

Inactive Publication Date: 2009-11-18
DALIAN GIGATEC ELECTRONICS
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Problems solved by technology

[0008] The present invention mainly solves the problem of audio information transmission through the KVM extender, and aims to use a single CAT5 network cable to realize long-distance transmission of audio signals, video signals, and keyboard and mouse signals
Thereby providing a processing method for audio signal embedding transmission based on a single CAT5 network cable (4 pairs) that can bidirectionally transmit stereo audio signals, and solve the problem of no audio signal transmission in the KVM extender in the prior art

Method used

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  • Single CAT5 net wire based KVM extender and realization method thereof
  • Single CAT5 net wire based KVM extender and realization method thereof
  • Single CAT5 net wire based KVM extender and realization method thereof

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Embodiment Construction

[0036] The KVM extender and its implementation method in the best implementation mode are described with reference to the accompanying drawings.

[0037] refer to image 3 and 4 Introduce the situation of the computer host side, its hardware is shown in the figure, and the working method is as follows:

[0038] 1. First, a positive clamping pulse CLAMP and a positive sampling pulse SAMPLE are generated by using the horizontal sync pulse of the computer video. The function of the clamping pulse is to clamp the video signal to 0V level before embedding the audio signal, as the reference level of the audio and video signal.

[0039] 2. The process of embedding the forward audio signal into the computer simulation video is as follows: image 3 As shown, first use CLAMP pulse to clamp the video signal to 0V level, and keep it until the next clamping pulse appears. Then, when the SAMPLE pulse signal is at a low level, the computer analog video signal is sent to the encoding m...

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Abstract

The invention discloses a single CAT5 net wire based KVM extender, which comprises a host end device and a user end device which are connected with the single CAT5 net wire. The KVM extender can realize transmission of audio signals, and specifically a realization method comprises the following steps that: S1, the host end device embeds the audio output signals into video signals by using a simulation embedding method, and sends the embedded signals to the user end device by three pairs of cables in the CAT5 net wire; and S2, the user end device de-embeds the acquired embedded signals into the video signals and the audio output signals, wherein the simulation embedding method is realized by sampling and keeping the audio output signals and then embedding the audio output signals into a blanking interval of the video signals. On the premise of not increasing the remote transmission cost, the KVM extender in the prior art is changed from noiselessness to noise by using four pairs of twisted-pair cables; and the KVM extender and the realization method have the advantages of low cost, convenient signal transmission, and the like.

Description

technical field [0001] The present invention relates to a signal transmission device and its implementation method, more specifically, to a device and its implementation method for long-distance transmission of video / audio signals, mouse signals, and keyboard signals Background technique [0002] KVM is the spelling of the English prefixes of keyboard (KEYBOARD), mouse (MOUSE) and computer video (VIDEO). The KVM extender can extend the computer's video signal, mouse signal, and keyboard signal (the mouse and keyboard are collectively referred to as keyboard and mouse in the following) for several hundred meters, and the user can control the computer host at a place hundreds of meters away from the computer host. [0003] The KVM extender in the prior art transmits video signals (3 pairs) and keyboard and mouse signals (1 pair) through a single CAT5 network cable. Such as figure 1 As shown, the KVM extender is divided into two parts from the signal type: the video signal pa...

Claims

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Application Information

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IPC IPC(8): H04N7/26G06F3/16G06F3/14G06F3/023G06F3/033G06F13/38G06F3/038
Inventor 程鹏姚景国刘剑
Owner DALIAN GIGATEC ELECTRONICS
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