CN209390197U - One kind being based on Ethernet HD video HDMI/VGA signal extender - Google Patents

Abstract

The utility model relates to HDMI networks to extend equipment technical field, Ethernet HD video HDMI/VGA signal extender is based on more particularly to one kind, including HDMI signal projector, the network switch and HDMI signal receiver, multiple video source signals pass through the signal input part that a HDMI signal projector is connected to a network switch respectively, multiple video players pass through the signal output end that a HDMI signal receiver is connected to a network switch respectively, the network switch has multicast functionality, be able to achieve multiple video source signals to conveying, more use demands are able to satisfy while extending HDMI conveying distance.

Description

One kind being based on Ethernet HD video HDMI/VGA signal extender

Technical field

The utility model relates to HDMI networks to extend equipment technical field, and in particular to one kind is based on Ethernet HD video HDMI/VGA signal extender.

Background technique

HDMI and VGA is a kind of digitized audio/video interface technology of compound high definition epoch standard, can be used for machine top The equipment such as box, DVD player, PC and television set, HDMI can be with simultaneous transmission audio and video-audio signals and without believing Number conveying before do other processing, have the characteristics that plug and play, during routine use, HDMI is adopted due to its audio/video Also greatly facilitate the installation of household audio and video system with the characteristic of same cable, but the almost lossless image quality of the data line of HDMI Transmission range is to will lead to cable signal loss more than 30 meters within 15 meters, and picture effect is very poor.

Has the network extender for HDMI on the market at present, by leading to after HDMI signal is converted into network signal It crosses interchanger and carries out multistage extension, increase the use distance of HDMI to a certain extent, but this kind of network extender only props up It holds a video transmission source or receives source, it is aobvious that multiple video sources and multiple displays point-to-point connection in local area network can not be handled The problem of showing has some limitations.

Utility model content

To solve the above problems, the utility model provides one kind based on Ethernet, the more video source signals of energy to a transmission The HDMI/VGA network extender of display, including HDMI signal projector, the network switch and HDMI signal receiver, multiple views Frequency source signal respectively passes through the signal input part that a HDMI signal projector is connected to a network switch, multiple video playings Device passes through the signal output end that a HDMI signal receiver is connected to a network switch respectively, and the network switch has group Multicast function is able to achieve the fixed point conveying of multiple video source signals.

The utility model is provided one kind in order to solve the above problem and is prolonged based on Ethernet HD video HDMI/VGA signal Long device, including HDMI signal projector, the network switch and HDMI signal receiver, the HDMI signal projector includes HDMI Signal input part, the first HDMI interface chip, the first signal processing unit, first network interface chip and the connection of the first cable End, the first HDMI interface chip are sent to after being converted to RGB888 signal from the HDMI signal that HDMI signal input part receives RGB888 signal is converted to digital network signals and passes through first network by the first signal processing unit, the first signal processing unit Interface chip is transferred to the first cable connecting pin；The HDMI signal receiver includes that HDMI signal output end, the 2nd HDMI connect Mouth chip, second signal processing unit, the second network interface chip and the second cable connecting pin, the second cable connecting pin will receive To digital network signals second signal processing unit be sent to by network interface chip be converted into RGB888 signal, second HDMI interface chip receives the RGB888 signal that second signal processing unit is sent and is sent to after being translated into HDMI signal HDMI signal output end；The network switch be the interchanger with multicast functionality, the signal input part of the network switch and Signal output end passes through cable respectively and is separately connected the first cable connecting pin and the second cable connecting pin.

As a kind of further scheme based on Ethernet HD video HDMI/VGA signal extender of the utility model, institute State the network switch at least there are two, between multiple network switch pass through cable connect.

Beneficial effect

For connecting video source, HDMI signal or VGA signal pass through the HDMI signal input part of HDMI signal projector First HDMI interface chip is converted to RGB888 signal, and RGB888 signal is converted into digital network by the first signal processing unit Signal, digital network signals successively after first network interface chip and the network switch reach HDMI signal receiver, second The digital network signals received are sent to second signal processing unit and are converted into RGB888 signal by network interface chip, RGB888 signal after the second network interface chip is converted to HDMI signal or VGA signal, then from HDMI output end export to Playback equipment plays out output；The network switch is settable multistage to extend conveying distance, and the network switch, which uses, has group The interchanger of multicast function, when handle multiple video sources to transformation task when, opened by the contraposition dial-up to the network switch It puts row setting address into, could be matched when only the input terminal of the network switch is consistent with output end address at this time and be connected to pipeline Road, realizes the fixed point conveying in different video source, and is avoided that interfering with each other when multiple groups receive and dispatch cross-reference.

Detailed description of the invention

Fig. 1 is the principle process schematic diagram of the utility model HDMI signal extender unicast data；

Fig. 2 is the flow diagram of the utility model HDMI signal extender multiple spot fixed point transmission data；

Marked in the figure: 1, HDMI signal projector, 2, the network switch, 3, HDMI signal receiver.

Specific embodiment

As shown in the figure: one kind being based on Ethernet HD video HDMI/VGA signal extender, including HDMI signal projector 1, multiple signals of the network switch 2 and HDMI signal receiver 3, multiple HDMI signal projectors 1 and network switch 2 input End connection, multiple HDMI signal receivers 3 are connect with the signal output end of network switch 2, and the HDMI signal projector 1 wraps Include HDMI signal input part, the first HDMI interface chip, the first signal processing unit, first network interface chip and the first cable The various chips similar with the chip functions structure of 6604 models can be used in connecting pin, the first HDMI interface chip, support HDMI Or the multi-signals such as VGA, the signal of video source enter HDMI signal projector 1, video source signal by HDMI signal input part The first signal processing unit is sent to after the first HDMI interface chip is converted into RGB888 signal, the first signal processing unit will RGB888 signal is converted to digital network signals and is transferred to the first cable connecting pin by first network interface chip；

Digital network signals pass through network cable transmission between HDMI signal projector 1 and HDMI signal receiver 3, in signal In receiver 3, digital network signals are entered by the second network interface chip is converted into RGB888 in second signal processing unit Signal, RGB888 signal are sent to HDMI after the second HDMI interface chip is converted into corresponding HDMI signal or VGA signal Signal output end, HDMI signal output end can connect the equipment such as display screen to play out to HDMI signal；Wherein the 2nd HDMI The various chips similar with the chip functions structure of 6612 models, first network interface chip and the second net can be used in interface chip Network interface chip can be used the various chips similar with IP101G model chip functional structure, and the first signal processing unit and Binary signal processing unit is mainly used for the mutual conversion of RGB888 signal and digital network signals, can be used and TF680 model C PU The similar multiple systems grade chip of functional structure；

Carried out data transmission between HDMI signal projector 1 and HDMI signal receiver 3 by cable, between more piece cable The integrality to guarantee transmission range and information can be connected by two or more network switch 2, the network switch 2 need to be adopted With the multicast network interchanger for being integrated with multicast functionality, address is arranged to the contraposition toggle switch in this network switch 2, it can Realize that the single pair between multiple HDMI signal projectors 1 and multiple HDMI signal receivers 3 is more, one-to-one, multipair single and more More setpoint informations is conveyed.

The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model Limitation be not intended to limit the utility model although the utility model has been disclosed with preferred embodiment as above, it is any ripe Professional and technical personnel is known, is not being departed within the scope of technical solutions of the utility model, when in the technology using the disclosure above Hold the equivalent embodiment made a little change or be modified to equivalent variations, but all without departing from technical solutions of the utility model Hold, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still It is within the scope of the technical solutions of the present invention.

Claims (2)

1. one kind is based on Ethernet HD video HDMI/VGA signal extender, it is characterised in that: including HDMI signal projector (1), the network switch (2) and HDMI signal receiver (3), the HDMI signal projector (1) include HDMI signal input part, First HDMI interface chip, the first signal processing unit, first network interface chip and the first cable connecting pin, the first HDMI connect Mouth chip will be converted to after RGB888 signal from the HDMI signal that HDMI signal input part receives is sent to the first signal processing RGB888 signal is converted to digital network signals and is transmitted by first network interface chip by unit, the first signal processing unit To the first cable connecting pin；The HDMI signal receiver (3) includes HDMI signal output end, the second HDMI interface chip, Binary signal processing unit, the second network interface chip and the second cable connecting pin, the number that the second cable connecting pin will receive Network signal is sent to second signal processing unit by network interface chip and is converted into RGB888 signal, the second HDMI interface core Piece receives the RGB888 signal that second signal processing unit is sent and is translated into after HDMI signal that be sent to HDMI signal defeated Outlet；The network switch (2) is the interchanger with multicast functionality, the signal input part and signal of the network switch (2) Output end passes through cable respectively and is separately connected the first cable connecting pin and the second cable connecting pin.

2. as described in claim 1 a kind of based on Ethernet HD video HDMI/VGA signal extender, it is characterised in that: institute State the network switch (2) at least there are two, between multiple network switch (2) pass through cable connect.