CN202309948U

CN202309948U - Multi-channel high definition multimedia interface (HDMI) signal distributor

Info

Publication number: CN202309948U
Application number: CN2011204367295U
Authority: CN
Inventors: 于晓亮
Original assignee: SHENZHEN EISEN VAIL TECHNOLOGY Co Ltd
Current assignee: SHENZHEN EISEN VAIL TECHNOLOGY Co Ltd
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-04
Anticipated expiration: 2021-11-04

Abstract

The utility model discloses a multi-channel high definition multimedia interface (HDMI) signal distributor, which comprises a signal input interface for inputting audio video signals, a primary distributing module with the input end connected with the signal input interface, four secondary distributing modules with the input ends connected with the output end of the primary distributing module, 16 signal output interfaces divided into four groups and a power supply module for supplying power to each module. The signal output interfaces of the same group are connected with the output end of one secondary distributing module, the primary distributing module and a control end of any one secondary distributing module are both connected with a microprogrammed control unit (MCU) control module and a switch control module. The multi-channel HDMI signal distributor can connect one high definition signal source with 16 high definition display terminals in distributing mode. In addition, when the multi-channel HDMI signal distributor is connected with a signal output end of an HDMI line, the multi-channel HDMI signal distributor can amplify the HDMI signals. The multi-channel HDMI signal distributor greatly facilitates users and has wide market prospects.

Description

Multichannel HDMI signal distributor

Technical field

The utility model relates to signal distributor, relates in particular to a kind of multichannel HDMI signal distributor that 1 road HDMI input signal is assigned as 16 road HDMI output signal.

Background technology

The market will be connected to the playing audio/video of an output HDMI signal on the multiple TV set when display devices such as displaying television set.Existing signal allocation equipment can only distribute analog signal; Such as the color difference signal that can distribute YPbpr; Can not distribute the HD video of multiplexing speed up to 6.75Gbps, and, distribute passage few; Therefore existing signal allocation equipment can not satisfy needs of people, and a kind of multichannel HDMI signal distributor is needed in market badly.

The utility model content

The utility model is the problems referred to above that will solve prior art, proposes a kind of multichannel HDMI signal distributor that 1 road HDMI input signal is assigned as 16 road HDMI output signal.

For solving the problems of the technologies described above; The technical scheme that the utility model proposes is: a kind of multichannel HDMI signal distributor; It comprises a signal input interface that is used to import audio-video signal, one-level distribution module that input links to each other with signal input interface, 4 secondary distribution modules that input is connected with one-level distribution module output, 16 signal output interfaces that are divided into 4 groups and to the supply module of each module for power supply; Wherein signal output interface is connected the output of 1 secondary distribution module on the same group, and the control end of one-level distribution module and any one secondary distribution module all is connected a MCU control module and a switch control module.

Above-mentioned audio-video signal is the HDMI signal.

Compared with prior art, the utility model can be connected to 16 high definition display terminals to a high-definition signal source, and the high-definition signal that at an easy rate a high-definition signal source is produced is assigned on the display or projector of 16 support high-definition signals.In addition, when being connected on the signal output part of a HDMI line to it, can amplify the HDMI signal.Be very easy to the user, have vast market prospect.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is made detailed explanation, wherein:

Fig. 1 is the theory diagram of the utility model preferred embodiment;

Fig. 2 is the circuit diagram of the utility model preferred embodiment power module;

Fig. 3 is the circuit diagram of the utility model preferred embodiment signal input interface;

Fig. 4 is the circuit diagram of the utility model preferred embodiment one-level distribution module;

Fig. 5 is the circuit diagram of the utility model preferred embodiment secondary distribution module;

Fig. 6 is the circuit diagram of 1 group of signal output interface of the utility model preferred embodiment;

Fig. 7 is the circuit diagram of the utility model preferred embodiment MCU control module;

Fig. 8 is the circuit diagram of the utility model preferred embodiment switch control module.

Embodiment

The utility model discloses a kind of multichannel HDMI signal distributor; It comprises a signal input interface that is used to import audio-video signal, one-level distribution module that input links to each other with signal input interface, 4 secondary distribution modules that input is connected with one-level distribution module output, 16 signal output interfaces that are divided into 4 groups and to the supply module of each module for power supply; Wherein signal output interface is connected the output of 1 secondary distribution module on the same group, and the control end of one-level distribution module and any one secondary distribution module all is connected a MCU control module and a switch control module.Theory diagram referring to the preferred embodiment shown in Fig. 1; 1 of output interface; 16 of output interfaces, the signal that the one-level distribution module is received output interface are divided into 4 tunnel outputs, and the secondary distribution module is exported per 1 road signal by being divided into 4 the tunnel; Just so add 1 high-definition signal has been divided into 16 tunnel outputs, 16 output interfaces can connect 16 high definition display devices.In the preferred embodiment, audio-video signal is the HDMI signal.

Referring to the supply module circuit diagram of the preferred embodiment shown in Fig. 2, supply module comprises voltage stabilizing 5V DC power supply, said 5V DC power supply is transformed to the 3.3V DC power supply of 3.3V, said 5V DC power supply is transformed to the 1.8V DC power supply of 1.8V.Fig. 3 shows the input interface of the utility model preferred embodiment, left side mark " HDMI-A " for input HDMI signal and clock signal input interface, also can import TMDS, DDC, CEC, HPD signal.Fig. 4 illustrates one-level distribution module U14, chip model EP9134, and this chip has the audio frequency and video processing capacity, converts the Y/Cb/Cr signal of embedded capable field synchronization into, and signal is the Y/Cb/Cr conversion of signals that signal sends subordinate through handling then.Its upper left corner pin mark " HDMIRX " be signal input part, the upper left corner, the left and right sides, downside mark PORT0,3,2,1 be 4 signal output parts, these 4 ports connect the secondary distribution module respectively.Fig. 5 shows the circuit diagram of one of them secondary distribution module; The chip U10 that is responsible for secondary distribution has also adopted EP9134; Its upper left corner pin mark " HDMI RX " be signal input part; The upper left corner, the left and right sides, downside mark PORT0, PORT3, PORT2, PORT1's is 4 signal output parts, and these 4 ports connect 4 signal output interfaces respectively.4 secondary distribution modules can connect 16 signal output interfaces altogether.Fig. 6 shows wherein 1 group (4) signal output interface, i.e. J3, J4, J5, J6, and such signal output group has 4 groups.Fig. 7 shows the instance of a MCU control module; The model of MCU chip IC 3 is EPF011A; The initialization of this chip controls distribution module chips and the variation of state machine; Accomplish the work such as verification with HDCP of reading of EDID, so the control end of one-level distribution module and any one secondary distribution module all is connected a MCU control module.Fig. 8 shows the instance of a switch control module; Switch control module has adopted analog multiplexer; Its main chip U29 is MC74LVXT4052, and its clock pin SCL connects input interface, distribution module, output interface, and the SDA pin connects corresponding distribution module; With the break-make of Control Allocation module, so the control end of one-level distribution module and any one secondary distribution module all is connected a switch control module.

Above embodiment is merely and illustrates, non-providing constraints.Anyly do not break away from the application's spirit and category, and, all should be contained among the application's the claim scope its equivalent modifications of carrying out or change.

Claims

1. multichannel HDMI signal distributor; It is characterized in that: comprise a signal input interface that is used to import audio-video signal, one-level distribution module that input links to each other with signal input interface, 4 secondary distribution modules that input is connected with one-level distribution module output, 16 signal output interfaces that are divided into 4 groups and to the supply module of each module for power supply; Wherein signal output interface is connected the output of 1 secondary distribution module on the same group, and the control end of one-level distribution module and any one secondary distribution module all is connected a MCU control module and a switch control module.

2. multichannel HDMI signal distributor as claimed in claim 1 is characterized in that: said audio-video signal is the HDMI signal.