CN202217881U - High-definition multimedia interface (HDMI) matrix - Google Patents

Abstract

A high-definition multimedia interface (HDMI) matrix comprises a master control chip, an HDMI signal processing chip, an audio processing chip, a consumer electronics control (CEC) controller, a state indicating light, a reset switch, a power switch, a power supply adaptor port, an input HDMI interface and an output HDMI interface. The HDMI matrix can freely switch four ways of HDMI high-definition signal sources or distribute the four ways of HDMI high-definition signal sources to two ways of HDMI high-definition signals for outputting, and simultaneously audio at an output port can be output by an optical fiber or a stereo headphone.

Description

A kind of HDMI matrix

Technical field

The utility model relates to a kind of video matrix, is specifically related to a kind of HDMI matrix.

Background technology

HDMI HDMI (High Definition Multimedia Interface) is a kind of unpressed digital consumption electronic product interface standard; It merges high definition video and multi channel audio signal to be connected to and synthesizes processing on the single digital interface; Send out through the single line cable; It is a digital technology standard to household appliances manufacturing; Be widely used on DVD player, cable TV/satellite television STB (set-top box), HDTV and other digital audio-video equipment, it can improve the quality of digital picture effectively, no longer need carry out analog-to-digital conversion.

The HDMI interface is state-of-the-art in the world at present DTV interface standard, is the perfect solution of household appliances digital data transmission, connection.HDMI is based on DVI (Digital Visual Interface) formulation, can be regarded as reinforcement and the extension of DVI, and both can be compatible.HDMI is in that keep under the high-quality situation can be with the high score pigtail rate video and the multichannel audio data of Digital Transmission uncompressed, and high transmission speed is 5Gbps.Indubitable; HDMI HDMI is the indispensable important component of audiovisual industry; It will be a big main flow trend of following audiovisual industry development; Therefore the HDMI connector also will become connector industry Focal Point of Common Attention undoubtedly, and in order to comply with this trend, industry is constantly released many new structures successively to satisfy the demand of high-speed transfer.

HDMI is the coffret of being developed to the next generation multimedia audio-visual devices, is applicable to DTV, DVD player, DVD videocorder, PVR, STB and other digital audio-video products of digital household appliances.Its greatest feature is audio signal and the high definition video signal that the HDMI interface can transmit in a transmission cable does not have compression.Distributor is the most frequently used parts in the CATV transmission system assignment network; Be used for distributing vision signal; It can be divided into the output of several roads equably with one road input signal; Usually have and two distribute, three distribute, four distribute, six distribute and eight distribution, along with the increase of the end product of band HDMI interface, some public arenas such as bar, sales field need similar before the audio frequency and video distributor product of AV.

The utility model content

The utility model provides a kind of HDMI matrix, can couple together four high-definition signal sources and two high-definition signal ends simultaneously, and the output audio frequency can optical fiber or stereophone output simultaneously.It can be at an easy rate freely switches four road high-definition signals in the display of two compatible high-definition signals or projector or distributes, and output port can be realized the independent output of audio frequency through optical fiber or stereophone.This HDMI matrix is used HDMI standard cable for the HDMI signal of input, and the input transmission range can reach 15 meters, and the output transmission range can reach 25 meters.This HDMI matrix can be following application solution is provided: the retail of HDTV, top box of digital machine, DVD, projector and displaying place; The test environment of HDTV, top box of digital machine, DVD, production plant of projector; The application in data center's control, information distribution, meeting room demonstration, teaching environment and training place.

For reaching above purpose, the technical scheme that the utility model is taked is:

A kind of HDMI matrix; Comprise main control chip, HDMI signal processing chip, Audio Processing chip, consumer electronics control CEC controller, stereophone interface, input HDMI interface and output HDMI interface; Said main control chip is connected with the HDMI signal processing chip through data wire, and said main control chip comprises a CPU; Said HDMI signal processing chip is connected with said input HDMI interface, said output HDMI interface and said Audio Processing chip respectively, and said HDMI signal processing chip is connected with said consumer electronics control CEC controller; Said consumer electronics control CEC controller comprises the 2nd CPU; Said Audio Processing chip is connected with said stereophone interface.

Preferably, said Audio Processing chip is connected with the DAB output interface of HDMI signal processing chip.

Preferably, also comprise status indicator lamp, reset switch, mains switch and power supply adaptor interface.

Preferably, said HDMI signal processing chip also is connected with optical fiber interface.

Preferably, wherein importing the HDMI interface is 4, and output HDMI interface is 2.

Preferably, also comprise input selector switch, it comprises 2 switches, respectively corresponding 2 road output interfaces.Through pressing 2 input selector switches a road in can signal of 4 HDMI input channels of Cyclic Selection continuously to any output channel.

Also comprise status indicator lamp; It comprises that 1 power supply indicator is used to indicate the on off operating mode of power supply; 8 input channels and 2 output state indicator lights are used to indicate that this passage is current whether transfer of data arranged; These status indicator lamps all are connected with main control chip, wherein corresponding 4 input indicators of each output.

Said HDMI matrix is a rectangular structure; Comprise front panel, rear board, Left-Hand Panel, right panel; On said front panel, comprise 2 HDMI output interface indicator lights, 2 groups 4 HDMI input interface indicator lights, 1 power supply indicator, reset switch, 2 input selector switches, mains switch, an infrared receiving terminal; On said rear board, comprise 3 input HDMI interfaces, 1 power supply adaptor interface; On said Left-Hand Panel, comprise 1 input and 1 output HDMI interface, on said right panel, comprise 1 output HDMI interface, 1 optical fiber output interface, 1 stereophone interface.

Because the utility model has adopted above-mentioned technical measures, make its contrast prior art that following advantage arranged:

Can couple together four high-definition signal sources and two high-definition signal ends simultaneously, the output audio frequency can optical fiber or stereophone output simultaneously.At an easy rate four road high-definition signals are freely switched in the display of two compatible high-definition signals or projector or distribute, and output port A can realize the independent output of audio frequency through optical fiber or stereophone.

In sum, the utlity model has following advantage:

1) input of four road HDMI signals is switched or is assigned to two HDMI signal ends, and supports 30/36 dark color;

2) compatible HDCP protects high frequency range digital content, when transmitting through coffret, can not suffer illegal copies in order to guarantee digitized image and voice data;

3) support that CEC is used for controlling the multiple audio-visual equipment that the user uses possibly;

4) support 3D to show, reach aspect stereoeffects such as vision, the sense of hearing through the computing that utilizes computer;

5) support blue-ray DVD 24/50/60fs/HD-DVD/xvYCC

6) support audio format DTS-HD/Dolby-trueHD/LPCM7.1/DTS/DOLBY-AC3/DSD

7) any signal end can independently be exported through optical fiber or stereophone realization audio frequency;

8) input can carry out the remote control switching through infrared ray, also can directly touch the button and control

9) the supporting signal sequential is reformed.Along with the raising of clock frequency, effective read-write window of leaving transfer of data for is more and more littler, wants in very short time restriction, lets data-signal from intactly being sent to receiving terminal from drive end, carries out accurate sequential and calculates and analyze;

10) use HDMI standard cable, the input transmission range can reach 15 meters, and the output transmission range can reach 25 meters;

11) no signal loss;

12) install simply.

Description of drawings

Fig. 1 is the schematic block circuit diagram of the utility model.

Fig. 2 is the front panel sketch map of the utility model.

Fig. 3 is the rear board sketch map of the utility model.

Fig. 4 is the Left-Hand Panel sketch map of the utility model.

Fig. 5 is the right panel sketch map of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further explain.

Fig. 1 shows the circuit connecting relation of each funtion part of the utility model; Therefrom can find out; Comprise main control chip 1, HDMI signal processing chip 3, Audio Processing chip 4, consumer electronics control CEC controller 2, status indicator lamp, reset switch, mains switch, 2 input selector switches, power supply adaptor interface, input HDMI interface 9 in the HDMI matrix; 10,11,12 and output HDMI interface.Wherein, main control chip 1 comprises a CPU, is connected with HDMI signal processing chip 3 through data wire; HDMI signal processing chip 3 is connected with consumer electronics control CEC controller 2 through input HDMI interface 9,10,11,12; Consumer electronics control CEC controller 2 comprises the 2nd CPU, and HDMI signal processing chip 3 is connected with consumer electronics control CEC controller 2 through HDMI TXA 5 and HDMI TXB 6 respectively; Wherein importing the HDMI interface is 4; Output HDMI interface is 2; In 2 output HDMI interfaces, one road output interface output HDMI goes back output optical fibre audio signal to optical fiber interface 7 in the time of signal, and the stereophone signal is delivered to stereophone interface 8 through Audio Processing chip 4.

Referring to Fig. 2-5, this HDMI matrix is a rectangular structure, and its front panel is provided with reset switch 13, input selector switch 14, infrared joint 15 and mains switch 16; Rear board is provided with input HDMI interface 9; 10; 11 and power supply adaptor interface 7, Left-Hand Panel is provided with input HDMI interface 12 and output HDMI interface 17, and right panel is provided with output HDMI interface 18, optical fiber output interface 19 and stereophone interface 8.

Through pressing 2 input selector switches 14 a road in can signal of 4 HDMI input channels of Cyclic Selection continuously to any output channel; Status indicator lamp; Comprise that 1 power supply indicator is used to indicate the on off operating mode of power supply; 8 input channel status indicator lamps and 2 output channel status indicator lamps are used to indicate that this passage is current whether transfer of data arranged, and these status indicator lamps all are connected with main control chip 1.

The utility model employed four advances two and goes out chip, possesses the switching distribution capability that 4 port HDMI signals are imported the output of 2 port HDMI signals, possesses complete HDCP (Dynamic Host Configurat ion Protocol) deciphering/data encryption ability.

The utility model has used 1 CEC (consumer electronics control) controller that is used for consumer electronics control, and the core of CEC controller is a single-chip microcomputer, and the consumer electronics controlled function is to realize through software.Under the situation of HDTV and video playback apparatus support, can realize video and audio product identification and Collaborative Control mutually, realize the function of all products in the single remote remote control whole system.

The utility model has used 1 to be used for the chip that audio frequency DA handles, and inferior chip provides single-ended output based on advanced person's multidigit Delta-Sigma structure, and the total harmonic distortion plus noise is-95dB that dynamic range reaches 105dB.Can+3.3V or+the 5V single supply under operation; And has other high added value performance; As: have that automatic sample rate detects, a digital deemphasis on the sheet, and it is technological to eliminate the Popguard of power supply circulation ticktack sound and explosion sound, helps to reduce the quantity of external devices.

Claims (3)

1. a HDMI matrix comprises main control chip, HDMI signal processing chip, Audio Processing chip, consumer electronics control CEC controller, stereophone interface, input HDMI interface and output HDMI interface, it is characterized in that:

Said main control chip is connected with the HDMI signal processing chip through data wire, and said main control chip comprises a CPU;

Said HDMI signal processing chip is connected with said input HDMI interface, said output HDMI interface and said Audio Processing chip respectively, and said HDMI signal processing chip is connected with said consumer electronics control CEC controller;

Said consumer electronics control CEC controller comprises the 2nd CPU;

Said Audio Processing chip is connected with said stereophone interface.

2. HDMI matrix as claimed in claim 1 is characterized in that: also comprise status indicator lamp, reset switch, mains switch and power supply adaptor interface.

3. HDMI matrix as claimed in claim 1 is characterized in that: said HDMI signal processing chip also is connected with optical fiber interface.

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