CN102497515B

CN102497515B - SIMO (single-input multiple-output) type HDMI (high-definition multimedia interface) distributor device

Info

Publication number: CN102497515B
Application number: CN 201110401686
Authority: CN
Inventors: 任木兰; 吕秀君; 陈百祥; 王彬
Original assignee: QINGDAO AIFU HD TECHNOLOGY CO LTD
Current assignee: Qingdao Aifu Technology Co ltd
Priority date: 2011-12-07
Filing date: 2011-12-07
Publication date: 2013-10-09
Anticipated expiration: 2031-12-07
Also published as: CN102497515A

Abstract

The invention belongs to the field of electronic techniques, and relates to a SIMO (single-input multiple-output) type HDMI (high-definition multimedia interface) distributor device. The input end of a HDMI signal input unit introduces signals from a high-definition signal source, and the output end of the HDMI signal input unit is in electric information communication with a port processor unit;the output end of the port processor unit is in electric information communication with a one-input two-output processor unit, and outputs signals to the one-input two-output processor unit to carry out one-input two-output type distribution, then the one-input two-output processor unit is respectively connected with and transmits the signals to the next stage of two one-input two-output processor units connected in parallel to carry out one-input two-output type distribution again, and then the two one-input two-output processor units connected in parallel respectively carry out one-input two-output type signal distribution again; and through carrying out sequential repeated logical connection, an effect of SIMO type signal distribution is achieved. The SIMO type HDMI distributor device is novel and simple in structure, reliable in principle, good in distribution performance, low in application cost, low in energy consumption, and environment-friendly.

Description

A kind of single channel input multichannel output type HDMI dispenser device

Technical field:

The invention belongs to the electronic signal process technical field, relate to a kind of demultiplexing of one-channel signal being imported and export, support the distributor of the terminal equipment work of many different models and performance, particularly a kind of single channel input multichannel output type HDMI dispenser device.

Background technology:

At present; the arriving in high definition epoch has driven the development of digital interface; HDMI (High Definition Multimedia Interface) (HDMI) is the coffret of developing at the next generation multimedia audio-visual devices; the HDMI interface can provide the data transfer bandwidth up to 10.2Gbps; can transmit the audio signal and the high definition video signal that do not have compression; need not simultaneously to transmit advance capable D/A or mould/number conversion at signal, can guarantee that the video-audio signal of first water transmits.The consumer is because various AV connecting lines are too huge and disturbed deeply at present, and the HDMI interface can replace numerous audio-visual lines with single connecting line, and is succinct convenient, and because audio/video adopts same cable, simplified the installation of system greatly.The HDMI product has become the standard digital interface of whole world consumption electronic product rapidly, and from DTV to DVD, the product of the various HDMI of having interfaces is seen everywhere all over the world, for the ultimate consumer brings more totally, numeral is experienced clearly.The HDMI distributor is that high-definition signal is dispensed to a kind of control appliance on a plurality of display devices or the projection display system, is the equipment of the interface shape of specific assigned HDMI signal.The HDMI distributor can be widely used in all need carry out the field that the HDMI signal distributes and makes up, and is applicable to Digital Television, DVD player, PVR, set-top box and other digital audio-video product of digital household appliances.The AFSP108/112HDMI distributor is exactly to comply with the requirement in market and develop, cooperate various high-definition signals source that one tunnel signal extension is exported simultaneously to eight tunnel/ten two road signals, the vision signal that is up to 1080P is provided for the high definition demonstration equipment, to fill a hole in the market, satisfy the demand in market, difference according to input signal has the VGA distributor, aberration distributor and HDMI distributor, the above two are analog signals, the latter is digital signal, so the transmission quality of HDMI distributor is higher, be divided into 4 the tunnel according to how much having of way of output, 8 the tunnel, 12 road and 16 distributors etc., HDMI supports EDID, DDC2B, therefore the equipment of HDMI has the characteristics of " plug and play ", can carry out " negotiation " automatically between signal source and the display device, selects only video/audio format automatically; Because line of HDMI transmits sound and video simultaneously, so connect more convenient; Difference according to the HDMI signal standards of supporting is divided into HDMI1.2,1.3 and 1.4, that most of usefulness is HDMI1.2 in the market, do not support the transmission of 3D signal, compatible relatively poor, the blue light disc player is not supported, and the distributor of seeking to develop a kind of HDMI1.4 can not only be supported the environment for use of various code stream instruments and blue-ray DVD, support the environment for use of various players simultaneously, use blank to fill up.

Summary of the invention:

The objective of the invention is to overcome the shortcoming that prior art exists, seek to design a kind of single channel input multichannel output type HDMI dispenser device at following electronic information technology and equipment growth requirement, can be implemented in and support multiple signals output under the driving of an input signal, thereby control the work of different outlet terminals and display.

To achieve these goals, the distributor that the present invention relates to comprises HDMI signal input unit, porthandler unit, one-in-and-two-out HDMI dispenser unit, power subsystem, MCU controller unit and HDMI signal output unit; The input of the HDMI signal input unit that the telecommunications breath is introduced is introduced signal from the high-definition signal source, output is connected with the connection of porthandler unit telecommunications breath and with high-definition signal to be carried in the porthandler unit, the output of porthandler unit and one-in-and-two-out HDMI dispenser unit telecommunications breath is communicated with and signal is exported to the one-in-and-two-out dispenser unit carry out being connected respectively after the one-in-and-two-out formula is distributed and send to the one-in-and-two-out formula that two one-in-and-two-out HDMI dispenser units that are connected in parallel of next stage carry out again and distribute, and two one-in-and-two-out HDMI dispenser units that are connected in parallel carry out one-in-and-two-out formula signal more respectively separately and distribute; The one-in-and-two-out HDMI dispenser unit of four parallel connections of afterbody carries out respectively being communicated with the HDMI signal output unit telecommunications breath of outlet terminal effect respectively separately after the one-in-and-two-out formula is distributed separately again, and carries out the one-in-and-two-out formula and distribute back output; Repeating the formula logic successively connect to realize one advancing eight to go out, one advances 12 and go out or one advance 16 signals that go out formula and distribute; Power subsystem and MCU controller unit are communicated with HDMI signal input unit, porthandler unit, one-in-and-two-out HDMI dispenser unit and HDMI signal output unit telecommunications breath respectively, make power supply, control and handle carrying out in order of distributing signal, realize that an inlet and multi-exit signal distributes effect.

The HDMI signal input unit that the present invention relates to is the signal of exporting from the high-definition signal source that meets the HDMI standard and the HDMI interface that is transferred to distributor, and the HDMI interface is provided with three passages, and wherein the TMDS passage is realized the transmission of all Voice ﹠ Video data; The DDC passage makes HDMI source end read the EDID data structure of receiving terminal by this passage, and then learns technical ability and characteristic that receiving terminal includes; The CEC passage is option, provides higher level occupation mode to allow the user use; Related porthandler unit adopts the Sil9389 processor chips, for having the HDMI processor of network and audio frequency retransmission function, support the HDMI1.4 characteristic, when 36 color depths, support the resolution of 1080p@60Hz or 720p/1080i@120Hz, need not to use Ethernet cable and S/PDIF cable when the 3D technology is provided, and then simplify the connectivity of family, integrated HDCP decryption engine, HDCP key is preset in integrated HDCP BIST self check; Related one-in-and-two-out HDMI dispenser unit is the PI3HDMI412AD chip, the active driving switch of HD video network based on DVI/HDMI standard and the processing of TMDS signal, adopt only preemphasis and balancing technique, guarantee when long-distance transmissions, to reduce to rise and fall time, under maximum 1.65Gbps DVI/HDMI data transmission rate, can provide HDTV desired 1920x1080 resolution, possesses output voltage swing control, support the 12Bit color depth, compatible with HDMI 1.1,1.2,1.3, superpower esd protection and driving transfer function, transmission and the ability to accept of raising signal; Related power subsystem comprises 3.3V for each functional unit provides power supply, 1.2V and 5V, and 3.3v and 1.2V realize voltage transitions by power-switching circuit (LDO); Related MCU controller unit adopts the Single-chip Controlling of CA6818 chip, by the variation of the resetting of total each chip of line traffic control of I2C, initialization and state machine, finishes the decryption work with HDCP of reading of EDID, and gives terminal with HDMI signal real-time Transmission; Related HDMI signal output unit meets the HDMI standard for one road HDMI signal of distributor chip output, comprises TMDS passage, DDC passage and CEC passage.

The present invention realizes that the step of signal distribution function and principle are: MCU at first carried out resetting of system after dispenser device powered on, the system of bottom brings into operation, the hot plug signal of the input and output of MCU detects, after the HDMI signal input unit receives the input of HDMI signal, the MCU control unit can notify the Sil9389 processor chips to open input channel, according to TMDS, DDC, three passages of CEC are accepted into signal, the analysis of packet is carried out in Sil9389 processor chips inside, finish the HDCP verification with the upstream equipment output signal, identify by two KEY, if verification is passed through, vision signal is become the white signal that does not have to encrypt detect output simultaneously, if there is output to insert, the MCU control unit can carry out the detection of downstream EDID information by the DDC passage, EDID information is put into the built-in EEPROM of SiI9389; Because distributor can connect different external display device, the standard of HDMI is from the HDMI1.1 standard upgrade of beginning till now during the HDMI1.4 standard, the EDID content change is big, EDID can not support needed all forms of all terminal presentation facilities, single-chip microcomputer can arrange the priority of the EDID of output port, and the standard of this priority is that the priority the closer to the output port of input port can be more high; When the outside connects eight or 12 terminal presentation facilities, single-chip microcomputer can be chosen the highest EDID of priority, and drop it off among the built-in EEPROM of SiI9389 processor chips, the form that can support this equipment writes the input of SiI9389 processor chips, upstream equipment output meeting is exported according to the form that current EDID can support, guarantees that the highest terminal presentation facility of priority shows correct image; 412AD is the chip of one-in-and-two-out HDMI dispenser unit, and one tunnel input is divided into two-way output, and each passage is provided with preemphasis and the processing of postemphasising, and carries out suitable adjustment according to the transmission power of signal, guarantees that each passage reaches Optimum Matching; When if the EDID in the system storage and TV can't mate, the MCU control unit source end that can automatically reset re-enters signal, repeats said process, up to finishing coupling.

The present invention compared with prior art has the following advantages, the one, high bandwidth provides high-quality audio-visual, the AFSP108/112 bandwidth supports 10,2G, meet HDMI1.4, HDMI researches and develops for the high-definition audio and video of development day by day and constantly weeds out the old and bring forth the new for this reason, develop into the HDMI1.4.HDMI earlier version and supported the data transmission rate of 4.96Gbps, the 10.2Gbps of latest edition till now, the bandwidth of superelevation is enough to transmit the audio signal of video and the Eight-channel of a 1080p, under the situation that guarantees genuine high-quality image quality, high sharpness video and multichannel HD Audio data with pure digi-tal mode transfer uncompressed, HDMI not only can satisfy the resolution of the high image quality Full HD 1080p of present HDTV, 100% lossless audio, realization is equivalent to the high definition audio of recording studio master tape, can support Dolby Digital Plus standard, with 24bit, 192kHz gathers the harmless non-compressing audio signal of Eight-channel, accomplish the ultimate attainment of visual and sound effects, and the equipment that carries HDMI all will be equipped with the HDCP agreement without exception, and the video content that has copyright in order to protection is not subjected to pirate influence; The 2nd, 36bit color depth promotes picture effect, AFSP108/112 supports color depth to 36bit, after HDMI develops into 1.3 versions and the further lifting of bandwidth, the carrying more information provides better picture effect, the support that for this reason adds dark (Deep Color) technology and xvYCC colour gamut, color depth is by 12bit (RGB or the YCbCr) color depth that is promoted to 1.3 versions from the 8bit color depth of original 1.1 versions, effectively eliminate the color transition non-uniform phenomenon and promoted contrast, make the picture performance more in every possible way, the 36bit color depth surmounts existing video card and can show to greatest extent, HDMI can continue maintenance technology " evergreen " in following following period of time, can be on various device long-term existence; The 3rd, long transmission distance, line is succinct, AFSP108/112 supports long distance Distance Transmission, the highest support to 30 meter, exactly because the advantage performance of HDMI aspect the high-definition audio and video transmission, newborn multimedia video equipment all begins to add the HDMI interface, S-Video for example, the AV composite video, the YPbPr component, usually can be made a noise dimmed by these analog interface cables, and the transmission range of existing cable is limited when setting up home theater, and cost height, and now by a HDMI cable, can replace maximum 13 mimic transmission lines, realize the simplicity of home entertainment system back line to greatest extent, can only transmit the signal that is no more than 8 meters at most with traditional DVI cable compares, HDM has reached 15 meters twice transmission ranges that are close to the former, can reach 30 meters farthest by adopting the Sil9389 processor chips, no longer worries the scruple of transmission range, HDMI supports plug and play, and the interface connection that is similar to the USB plug is very convenient; The 4th, existing HDMI distributor is not supported high-resolution video transmission, can not support 3D rendering, AFSP108/112 supports the 3d function of HDMI1.4, the video of transmission 3D form that can be smooth, support that resolution is up to 4KX2K, high resolution is that requirements at the higher level are prepared, and the HDMI interface provides extraordinary platform for interconnected, for application provides better compatible environment; The power consumption of the 5th, AFSP108/112 is lower, more energy-conserving and environment-protective; End is got up, and novel structure of the present invention is simple, and principle is reliable, and allocation performance is good, and use cost is low, and energy consumption is little, environmental friendliness.

Description of drawings:

Fig. 1 one the tunnel imports eight road output type distributor syndeton schematic block diagram.

Fig. 2 one the tunnel imports ten two road output type distributor syndeton schematic block diagram.

Embodiment:

Also be described further by reference to the accompanying drawings below by embodiment.

Embodiment:

The distributor that present embodiment relates to comprises HDMI signal input unit 1, porthandler unit 2, one-in-and-two-out HDMI dispenser unit 3, power subsystem 4, MCU controller unit 5 and HDMI signal output unit 6; The input of the HDMI signal input unit 1 that the telecommunications breath is introduced will be introduced signal from the high-definition signal source, output is communicated with porthandler unit 2 telecommunications breath and high-definition signal is conveyed into porthandler unit 2, the output of porthandler unit 2 and one-in-and-two-out HDMI dispenser unit 3 telecommunications breath is communicated with and signal is exported to the one-in-and-two-out formula that two one-in-and-two-out HDMI dispenser units that are connected in parallel that one-in-and-two-out dispenser unit 3 carries out sending to respectively after the one-in-and-two-out formula is distributed next stage carry out again distribute, and two one-in-and-two-out HDMI dispenser units that are connected in parallel carry out the distribution of one-in-and-two-out formula signal more respectively separately; The one-in-and-two-out HDMI dispenser unit of four parallel connections of afterbody carries out being communicated with the HDMI signal output unit 6 telecommunications breath of outlet terminal effect respectively separately after the one-in-and-two-out formula is distributed again, and carries out the one-in-and-two-out formula and distribute back output; Repeating the formula logic successively connect to realize one advancing eight to go out, one advances 12 and go out with one to advance 16 and go out; Power subsystem 4 and MCU controller unit 5 are communicated with HDMI signal input unit 1, porthandler unit 2, one-in-and-two-out HDMI dispenser unit 3 and HDMI signal output unit 6 telecommunications breath respectively, realize power supply and control and handle carrying out in order of distributing signal, realize that an inlet and multi-exit signal distributes effect.

The HDMI signal input unit 1 of present embodiment is the signal of exporting from the high-definition signal source that meets the HDMI standard and the HDMI interface that is transferred to distributor, and the HDMI interface has 3 passages, and wherein the TMDS passage is responsible for the transmission of all Voice ﹠ Video data; The DDC passage makes HDMI source end read the EDID data structure of receiving terminal by this passage, and then learns technical ability and characteristic that receiving terminal includes; The CEC passage is option, provides higher level occupation mode to allow the consumer use; Porthandler unit 2 adopts U.S.'s silicon to reflect the Sil9389 processor chips of company, this chip is the novel HDMI processor of the second generation that has network and audio frequency retransmission function, as second generation porthandler, support the HDMI1.4 characteristic widely, when 36 color depths, support the resolution up to 1080p@60Hz or 720p/1080i@120Hz, the InstaPortTM technology has been enriched home theater experience, only need switch a second, and provide 3D technology, simultaneously do not need to use Ethernet cable and S/PDIF cable, and then simplify the connectivity of family, integrated HDCP decryption engine, integrated HDCP BIST (self check) presets HDCP key; One-in-and-two-out HDMI dispenser unit 3 adopts the PI3HDMI412AD of U.S. PTI semiconductor company, this chip is aly to handle and the active driving switch of HD video network of exploitation based on DVI/HDMI standard and TMDS signal, this scheme has adopted unique and advanced preemphasis and balancing technique, guarantee when long-distance transmissions, to have reduced their rising and fall time, HDTV can be provided under maximum 1.65GbpsDVI/HDMI data transmission rate desired 1920x1080 resolution, possesses output voltage swing control, support the 12Bit color depth, compatible with HDMI 1.1,1.2,1.3, superpower esd protection and drive transfer function, thus transmission and the ability to accept of signal improved; Power subsystem 4 comprises 3.3V for each functional module provides power supply, and 1.2V and 5V, 3.3v and 1.2V realize voltage transitions by power-switching circuit (LDO); MCU controller unit 5 adopts CA6818 chip or other similar Single-chip Controlling, by resetting of total each chip of line traffic control of I2C, the work such as deciphering with HDCP of reading of EDID are finished in the variation of initialization and state machine, give terminal with HDMI signal real-time Transmission; HDMI signal output unit 6 is from one road HDMI signal of distributor chip output, meets the HDMI standard, comprises TMDS passage, DDC passage and CEC passage.

Specifeca tion speeification and the technical indicator of the single channel input multichannel output type HDMI distributor that present embodiment relates to are: bandwidth is≤2.5GHz (single-link); The highest support of input video form 4Kx2K, compatible 1080P and following resolution; The output video form is supported the 3D function among the HDMI1.4, compatible with HDMI 1.3 and following standard; Color depth is supported 12Bit (single-link); Power consumption≤10W (AFSP108) or 15W (AFSP112); Operating voltage is DC 5V; The integrated physical dimension of complete machine dress box is 280x95x35mm; Weight is 1Kg; The input power supply is for exchanging 100-240V/50Hz/60Hz.

Claims

1. a single channel input multichannel output type HDMI dispenser device is characterized in that the distributor that relates to comprises HDMI signal input unit, porthandler unit, one-in-and-two-out HDMI dispenser unit, power subsystem, MCU controller unit and HDMI signal output unit; The input of the HDMI signal input unit that the telecommunications breath is introduced is introduced signal from the high-definition signal source, output is connected with the connection of porthandler unit telecommunications breath and with high-definition signal to be carried in the porthandler unit, the output of porthandler unit and one-in-and-two-out HDMI dispenser unit telecommunications breath is communicated with and signal is exported to the one-in-and-two-out dispenser unit carry out being connected respectively after the one-in-and-two-out formula is distributed and send to the one-in-and-two-out formula that two one-in-and-two-out HDMI dispenser units that are connected in parallel of next stage carry out again and distribute, and two one-in-and-two-out HDMI dispenser units that are connected in parallel carry out one-in-and-two-out formula signal more respectively separately and distribute; The one-in-and-two-out HDMI dispenser unit of four parallel connections of afterbody carries out respectively being communicated with the HDMI signal output unit telecommunications breath of outlet terminal effect respectively separately after the one-in-and-two-out formula is distributed separately again, and carries out the one-in-and-two-out formula and distribute back output; Repeating the formula logic successively connect to realize one advancing eight to go out, one advances 12 and go out or one advance 16 signals that go out formula and distribute; Power subsystem and MCU controller unit are communicated with HDMI signal input unit, porthandler unit, one-in-and-two-out HDMI dispenser unit and HDMI signal output unit telecommunications breath respectively, make power supply, control and handle carrying out in order of distributing signal, realize that an inlet and multi-exit signal distributes effect; The HDMI signal input unit that relates to is the signal of exporting from the high-definition signal source that meets the HDMI standard and the HDMI interface that is transferred to distributor, and the HDMI interface is provided with three passages, and wherein the TMDS passage is realized the transmission of all Voice ﹠ Video data; The DDC passage makes HDMI source end read the EDID data structure of receiving terminal by this passage, and then learns technical ability and characteristic that receiving terminal includes; The CEC passage is option, provides higher level occupation mode to allow the user use; Related porthandler unit adopts the Sil9389 processor chips, for having the HDMI processor of network and audio frequency retransmission function, support the HDMI1.4 characteristic, when 36 color depths, support the resolution of 1080p@60Hz or 720p/1080i@120Hz, need not to use Ethernet cable and S/PDIF cable when the 3D technology is provided, and then simplify the connectivity of family, integrated HDCP decryption engine, HDCP key is preset in integrated HDCP BIST self check; Related one-in-and-two-out HDMI dispenser unit is the PI3HDMI412AD chip, the active driving switch of HD video network based on DVI/HDMI standard and the processing of TMDS signal, adopt only preemphasis and balancing technique, guarantee when long-distance transmissions, to reduce to rise and fall time, under maximum 1.65Gbps DVI/HDMI data transmission rate, can provide HDTV desired 1920x1080 resolution, possesses output voltage swing control, support the 12Bit color depth, compatible with HDMI 1.1,1.2,1.3, superpower esd protection and driving transfer function, transmission and the ability to accept of raising signal; Related power subsystem comprises 3.3V for each functional unit provides power supply, 1.2V and 5V, and 3.3v and 1.5v realize voltage transitions by power-switching circuit (LDO); Related MCU controller unit adopts the Single-chip Controlling of CA6818 chip, by the variation of the resetting of total each chip of line traffic control of I2C, initialization and state machine, finishes the decryption work with HDCP of reading of EDID, and gives terminal with HDMI signal real-time Transmission; Related HDMI signal output unit meets the HDMI standard for one road HDMI signal of distributor chip output, comprises TMDS passage, DDC passage and CEC passage.