CN109120973A - A kind of method, apparatus and storage medium of EDID data rewriting - Google Patents

A kind of method, apparatus and storage medium of EDID data rewriting Download PDF

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Publication number
CN109120973A
CN109120973A CN201810885739.3A CN201810885739A CN109120973A CN 109120973 A CN109120973 A CN 109120973A CN 201810885739 A CN201810885739 A CN 201810885739A CN 109120973 A CN109120973 A CN 109120973A
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China
Prior art keywords
edid
chip
hdmi
pin
address
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Granted
Application number
CN201810885739.3A
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Chinese (zh)
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CN109120973B (en
Inventor
辛志军
郑砚杰
华磊
金飞
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Qingdao Hisense Electronics Co Ltd
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Qingdao Hisense Electronics Co Ltd
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Priority to CN201810885739.3A priority Critical patent/CN109120973B/en
Priority to CN202111116515.4A priority patent/CN113992988A/en
Publication of CN109120973A publication Critical patent/CN109120973A/en
Application granted granted Critical
Publication of CN109120973B publication Critical patent/CN109120973B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4516—Management of client data or end-user data involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4518—Management of client data or end-user data involving characteristics of one or more peripherals, e.g. peripheral type, software version, amount of memory available or display capabilities

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The invention relates to fields of communication technology, the embodiment of the present application provides the method, apparatus and storage medium of a kind of EDID data rewriting, in the embodiment of the present application, when the external equipment of a port the HDMI connection in N number of port HDMI that terminal device determines display equipment supports Doby panorama sound ATMOS ability, it can be connect first by the first pin of master chip with N number of EDID chip, update the address of each EDID chip in N number of EDID chip, wherein, the address of any two EDID chips in updated N number of EDID chip is different；It can be connect by the second pin of master chip with N number of EDID chip, increase the data block for storing the audio format information that ATMOS is supported into N number of EDID chip.In this way, EDID data can be rewritten when determining that external equipment supports Doby panorama sound ATMOS ability.

Description

A kind of method, apparatus and storage medium of EDID data rewriting
Technical field
The invention relates to the method, apparatus of field of communication technology more particularly to a kind of EDID data rewriting and deposit Storage media.
Background technique
With the rapid development of mobile communication technology, the life manufacturer of smart television in order to improving the competing of product on the market Strive power, the high-definition multimedia (High that master chip can be all supported by HDMI Switch extended chip Definition Multimedia Interface, HDMI) ports-Extending is at multiple ports HDMI.
Expanded display recognition data (Extended Display when in the prior art, in order to guarantee that smart television is standby Identification Data, EDID) readable, the plug-in write-in in the channel HDMI that can be extended in HDMI Switch extended chip The eeprom chip of good EDID data.HDMI Switch extended chip is closed when standby, and equipment is directly read from eeprom chip EDID data are taken, realize the function of standby wakeup.But for supporting the tv product of Dolby ATMOS function, work as support After the power amplifier of ATMOS is connected to the port HDMI, smart television will carry out the corresponding EDID audio byte in all ports HDMI It rewrites, representative can support ATMOS function, and the EDID data in the channel this functional requirement HDMI can must dynamically rewrite.And it is sharp EDID data with the channel of HDMI Switch extension are on the plug-in EEPROM of write-in, are by showing data channel (Display Data Channel, DDC) is connected with master chip, and the channel DDC does not have dynamic and rewrites function, it is impossible to be used in Rewrite the operation of EDID data.
To sum up, a kind of method for needing EDID data rewriting, for determining external equipment support Doby panorama sound ATMOS When ability, EDID data can be rewritten.
Summary of the invention
The embodiment of the present application provides the method, apparatus and storage medium of a kind of EDID data rewriting, for determine it is external When equipment supports Doby panorama sound ATMOS ability, EDID data can be rewritten.
In a first aspect, the embodiment of the present application provides a kind of method of EDID data rewriting, in this method, display equipment is determined N number of port HDMI in a port HDMI connection external equipment support Doby panorama sound ATMOS ability, wherein N is big In 1 integer, show that the HDMI SWITCH module of equipment connects N number of EDID chip, each EDID core in N number of EDID chip Piece is connect with master chip by the channel DDC, and N number of port HDMI and N number of EDID chip correspond；Draw by the first of master chip Foot is connect with N number of EDID chip, updates the address of each EDID chip in N number of EDID chip, wherein updated N number of EDID The address of any two EDID chips in chip is different；It is connect by the second pin of master chip with N number of EDID chip, to N number of Increase the data block for storing the audio format information that ATMOS is supported in EDID chip.
Second aspect, the embodiment of the present application provide a kind of EDID data rewriting device, including determination unit, aobvious for determining Show that the external equipment of a port the HDMI connection in N number of port HDMI of equipment supports Doby panorama sound ATMOS ability, In, N is the integer greater than 1, shows that the HDMI SWITCH module of equipment connects N number of EDID chip, every in N number of EDID chip A EDID chip is connect with master chip by the channel DDC, and N number of port HDMI and N number of EDID chip correspond；First control is single Member, the external equipment for a port the HDMI connection in N number of port HDMI that determination unit determines display equipment are supported In the case where Doby panorama sound ATMOS ability, it is connect by the first pin of master chip with N number of EDID chip, updates N number of EDID The address of each EDID chip in chip, wherein the address of any two EDID chips in updated N number of EDID chip is not Together；Second control unit, for a port the HDMI connection in N number of port HDMI that determination unit determines display equipment In the case that external equipment supports Doby panorama sound ATMOS ability, connected by the second pin of master chip and N number of EDID chip It connects, increases the data block for storing the audio format information that ATMOS is supported into N number of EDID chip.
The third aspect, provides a kind of EDID data rewriting device, and device includes: main control unit, expanding element, multiple isolation Unit, multiple EDID storage units and multiple ports HDMI；Main control unit respectively with expanding element, multiple isolated locations, multiple EDID storage unit is connected, and for control reading or rewriting to EDID information in multiple EDID storage units, and controls multiple EDID access unit address is rewritten；Expanding element is connected with main control unit, multiple ports HDMI respectively, is used for main control unit HDMI original channel between expanding element is extended, and the multiple HDMI being expanded between unit and multiple ports HDMI expand Open up channel；Any EDID storage unit is connected with main control unit, expanding element, corresponding isolated location, the corresponding port HDMI, For storing the EDID information of corresponding HDMI extended channel；
Any isolated location is connected with main control unit, corresponding EDID storage unit respectively, for depositing as corresponding EDID When EDID information in storage unit is rewritten, it is connected between corresponding main control unit and corresponding EDID storage unit HDMI extended channel.
Optionally, main control unit is also used to detect the type of multiple external equipments of the multiple port HDMI accesses, works as detection There are when the first kind in multiple external equipments, control is cut off between multiple ports HDMI and corresponding EDID storage unit HDMI extended channel, and control and the EDID information stored in corresponding EDID storage unit is rewritten；It is multiple outer when detecting When to connect equipment all be Second Type, it is logical that control is connected to the HDMI extension between multiple ports HDMI and corresponding EDID storage unit Road, multiple external equipments can read the EDID information stored in corresponding EDID storage unit.
Optionally, multiple isolated locations are also used to: when multiple isolated locations connection main control unit is stored with corresponding EDID When HDMI extended channel between unit, the EDID information in multiple EDID storage units is rewritten in main control unit control； It is multiple external to set when multiple isolated locations cut off the HDMI extended channel between main control unit and corresponding EDID storage unit It is standby to be communicated with corresponding EDID storage unit, read the EDID information in the corresponding extension channel HDMI；
Optionally, when detecting in multiple external equipments there are when the first kind, control cut off multiple ports HDMI with it is corresponding EDID storage unit between HDMI extended channel specifically include: main control unit, which controls multiple EDID storage units, to be changed it and deposits Address is stored up, to cut off the HDMI extended channel between multiple ports HDMI and corresponding EDID storage unit.
Optionally, after the EDID information in multiple EDID storage units is rewritten in main control unit control, further includes: Main control unit controls the HDMI extended channel between multiple isolated location cutting main control units and corresponding EDID storage unit, with And main control unit controls multiple EDID storage units and is restored to original address；Multiple external equipments can read corresponding EDID The EDID information rewritten stored in storage unit.
Optionally, device is also used to: after having rewritten the EDID information of first EDID storage unit, controlling first The corresponding isolated location of EDID storage unit cuts off the HDMI extended channel between main control unit and EDID storage unit, and control First EDID access unit address is restored to original address by system；The corresponding external equipment of first EDID storage unit After reading modified EDID information, the rewriting that second EDID storage unit carries out EDID information is controlled；
Above-mentioned steps are successively executed, until all external equipments can read the EDID information of rewriting.
Optionally, device is also used to: after successively the EDID information of each EDID storage unit has been rewritten in control, controlling institute Some isolated locations disconnect the HDMI extended channel between main control unit and EDID storage unit, and control multiple EDID storages The address of unit is restored to original address, so that multiple external equipments read corresponding modified EDID information respectively.
Fourth aspect, the embodiment of the present application provide a kind of computer storage medium, finger are stored in computer storage medium It enables, when run on a computer, so that computer executes any possible implementation of first aspect or first aspect In method.
5th aspect, the embodiment of the present application provides a kind of computer program product comprising instruction, when its on computers When operation, so that computer executes the method in any possible implementation of first aspect or first aspect.
In the embodiment of the present application, when a port HDMI in N number of port HDMI that terminal device determines display equipment connects The external equipment connect supports Doby panorama sound ATMOS ability, wherein N is the integer greater than 1, shows the HDMI SWITCH of equipment Module connects N number of EDID chip, and each EDID chip in N number of EDID chip is connect with master chip by the channel DDC, N number of The port HDMI and N number of EDID chip correspond；It can be connect first by the first pin of master chip with N number of EDID chip, Update the address of each EDID chip in N number of EDID chip, wherein any two EDID cores in updated N number of EDID chip The address of piece is different；It can be connect by the second pin of master chip with N number of EDID chip, increase into N number of EDID chip and use In the data block for the audio format information that storage ATMOS is supported.In this way, determining external equipment support Doby panorama sound When ATMOS ability, EDID data can be rewritten.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, the drawings in the following description are only some examples of the present application, for this For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings His attached drawing.
Figure 1A is Dolby Atmos configuration diagram provided by the embodiments of the present application；
Figure 1B is the electrical block diagram of extension HDMI access provided by the embodiments of the present application；
Fig. 1 C provides a kind of applicable system architecture schematic diagram for the embodiment of the present application；
Fig. 1 D provides a kind of applicable system architecture schematic diagram for the embodiment of the present application；
Fig. 2 provides the flow diagram of a kind of method of EDID data rewriting for the embodiment of the present application；
Fig. 3 provides a kind of schematic diagram of isolation circuit for the embodiment of the present application；
Fig. 4 provides a kind of schematic diagram of address rewriting circuit module for the embodiment of the present application；
Fig. 5 provides a kind of application scenarios schematic diagram for the embodiment of the present application；
Fig. 6 provides a kind of structural schematic diagram of the device of EDID data rewriting for the embodiment of the present application.
Specific embodiment
In order to which the purpose, technical solution and beneficial effect of the application is more clearly understood, below in conjunction with attached drawing and implementation Example, is further elaborated the application.It should be appreciated that specific embodiment described herein is only used to explain this Shen Please, it is not used to limit the application.
First to this application involves noun be explained:
EDID (Extended Display Identification Data), i.e. expanded display recognition data, are videos The data standard that normal structure VESA designs for the optimization display format that PC display is arranged.EDID includes the base of display equipment This parameter, such as manufacturer, name of product, maximum row field frequency, supported resolution ratio are to realize plug-and-play feature behind Data.The storage mode of EDID includes built-in and external two ways.EDID built-in manner, which refers to, writes on journey for EDID data In sequence, EDID data are written in eeprom chip when smart television direct current is switched on, use when removes eeprom chip The middle EDID data for obtaining smart television.The external mode of EDID, which refers to, directly writes on EDID data external eeprom chip In, by showing that data channel is directly read by external equipment, without the control by smart television main program.
HDMI (High Definition Multimedia Interface, HDMI), i.e. high-definition multimedia interface, A kind of digitized video/audio interface technology, be suitble to image transmission tailored version digital interface, can transmit simultaneously audio and Video signal, the maximum data transmission speed are 48Gbps (2.1 editions), at the same without carried out before signal transmits D/A or mould/ Number conversion.HDMI interface has warm connection function.HPD (Hot Plug Detection), exactly in order to realize HDMI connection Hot plug and design, briefly, when transmitting terminal access receiving end when, receiving end respond HPD signal to transmitting terminal, Jin Erfa Sending end will start the channel DDC, and read receiving end EDID information, then carry out HDCP interaction, if mutual authentication success, depending on Frequently, audio works normally, and otherwise connection failure, homologous ray does not have different processing.
Dolby Atmos, i.e. Doby panorama sound are researched and developed by Dolby Labs, and 5.1,7.1 sound in traditional sense is breached The concept in road can show dynamic sound effect, more really build audio from the distant to the near in conjunction with substance film； Cooperation ceiling adds speaker, realizes that sound field is surrounded, shows more sound details, promotes the viewing impression of spectators.
DDC (Display Data Channel), that is, show data channel, be the receiving end HDMI and transmitting terminal information exchange Channel.Transmitting terminal reads the data being stored in the EEPROM of receiving end by the channel DDC, obtains the basic parameter of receiving end, Such as supported resolution ratio, 3D, 4K2K, audio related data.Transmitting terminal being capable of receiving end according to obtained information selection The best output format of identification transmits audio, video data.In the embodiment of the present application, the reading of EDID information is carried out using the channel DDC It takes.
IIC (Inter-Integrated Circuit), i.e. IC bus, generally there is two signal wires, and one is Two-way data line SDA, another is clock line SCL.All serial data SDA being connected on I2C bus apparatus are connected to always On the SDA of line, the clock line SCL of each equipment is connected on the SCL of bus.In the embodiment of the present application, EDID is believed using the channel IIC Breath is rewritten.
One channel HDMI can be extended to multiple mutually similar by HDMI Switch chip for the extension in the channel HDMI The channel HDMI of type commonly realizes " 1 becomes 3 " on the market, a channel HDMI can be expanded into three channels HDMI. It is exemplary, if master chip has 2.0 port 2 road HDMI, 6 road HDMI can be extended to by 2 HDMI Switch chips 2.0 channel.
SOC (System on Chip, system level chip), systems-on-a-chip also has title system on chip, has spy by multiple The system or product that the integrated circuit combination of function is formed on a single die are determined, wherein comprising complete hardware system and its holding The embedded software of load.In the embodiment of the present application, whether SOC detection device is accessed, and whether control isolation circuit opens, and Reading and rewriting of EDID information etc..
ARC (Audio Return Channel), i.e. sound passback can enable TV will using single HDMI connecting line Audio signal uplink is sent to the bar speaker of connection, single box home theater or AV receiver, by setting in TV and audio " shaking hands " is formed between standby to create the channel of bidirectional information, it is no longer necessary to which optical fiber voice-frequency cable is to reduce the mixed of family's middle line Disorderly.
HDCP (High-bandwidth Digital Content Protection, high-bandwidth digital content protection skill Art): when user carries out bootlegging, which will do it interference, the quality for copying the image come be reduced, thus to content It is protected.
Application scenarios:
For TV to realize that Dolby Atmos effect at least needs two equipment, one is the function for supporting ATMOS function It puts, is connected to the channel HDMI with ARC function, the other is supporting the external equipment of ATMOS, such as DVD, i.e. a HDMI Channel is used to input audio, video data, another channel HDMI is for realizing " loudspeaker " function.
Schematically, Figure 1A is Dolby Atmos configuration diagram provided by the embodiments of the present application, as shown in Figure 1A, when After supporting the external equipment (such as DVD) of Dolby Atmos to be inserted into HDMI interface, then HDMI is established by HDMI wire and SOC Channel, external equipment can transmit audio-video signal to SOC, which can be HDMI 1.4, be also possible to HDMI 2.0, the HDMI of even higher version, as long as meeting the requirement of data transmission relevant parameter.In actual conditions, it usually needs Multichannel HDMI transmits different data.In addition, to realize that Dolby Atmos effect at least also needs support Dolby Atmos power amplifier, the power amplifier need to access on the port HDMI for supporting ARC, that is, establish the channel HDMI ARC, SOC can pass through The output of the channel HDMI ARC progress sound.Audio, video data is inputted in SOC by the channel HDMI, is decoded by SOC, separation view Frequency image and audio, wherein video image can be exported by display screen, and audio then passes through the channel HDMI ARC and is output to Dolby Atmos power amplifier, thus may be implemented the broadcasting of video.Wherein, there is the port HDMI of ARC function and do not have The difference of the port HDMI of ARC function are as follows: the port HDMI with ARC function has an ARC voice transmission to be connected to master chip.
It is more and more to 2.0 port requirements of HDMI since high definition television technology develops, and most of chip manufacturers are most Two-way HDMI 2.0 is provided, far from meeting the needs of market.A kind of optional implementation is by increasing HDMI Switch 1 road HDMI 2.0 of TV master chip is extended to multichannel HDMI 2.0 by extended chip.And it is provided according to EDID agreement, extension Every 2.0 channel HDMI all the way afterwards should respectively correspond respective EDID information, in addition, the port HDMI of TV requires branch Hold CEC standby wakeup function, and the equipment in HDMI specification for supporting CEC standby wakeup function, EDID number when standby According to must it is readable, this requires HDMI Switch extended chip need in working condition, but at this time HDMI Switch extend core The operating current of piece can reach tens milliamperes or more it is even higher, cause television standby power consumption exceeded, be unsatisfactory for authentication requesting.It is comprehensive On, a kind of optional implementation be after expansion per 2.0 channel HDMI all the way on plug-in EDID chip, and EDID is believed Breath is written on the EDID chip.
Illustratively, Figure 1B is the electrical block diagram of extension HDMI access provided by the embodiments of the present application, such as Figure 1B Shown, DDC0 pin above SOC chip connects HDMI Switch extended chip, can be with by HDMI Switch extended chip 3 ports HDMI are expanded, i.e. the first pin of extended chip connects HDMI first port, the second pin connection of extended chip The third pin of HDMI second port, extended chip connects HDMI third port, outer on per HDMI access all the way to hang with EDID Chip, for storing the EDID information of respective HDMI access, in this way, when external equipment is connected to the different ports HDMI, all EDID chip corresponding to the port HDMI can be found, corresponding EDID information is read.
Illustrate, Figure 1B only illustrates that one pin of SOC chip extends multiple ports HDMI, the SOC chip other draw The HDMI ports-Extending of foot no longer example here, can realize with reference to above-mentioned introduction.
Since Doby panorama sound (Dolby Atmos) can show dynamic sound effect, more very in conjunction with substance film The real audio built from the distant to the near, more and more TVs support Dolby Atmos function, and are standardized according to Dolby, electricity After only detecting equipment that Dolby Atmos function is supported in insertion, just need to rewrite EDID information, representative can be with Support ATMOS function, and TV does not detect that when being inserted into the equipment for supporting Dolby Atmos function, EDID information is fixed , in order to guarantee that conventional equipment can be communicated normally with TV.In this way, to realize Dolby Atmos effect, it is necessary to The EDID data in the channel HDMI can must dynamically rewrite.
It can be seen from figure 1b if 2.0 channel HDMI being extended using HDMI Switch extended chip, EDID Data are on the plug-in EDID chip of write-in, which is simultaneously connected by DDC pin with master chip.
And external equipment can only read the information stored on EDID chip by DDC pin, do not have dynamic and rewrite The ability of EDID information, when Dolby Atmos external equipment is supported in access, it is also necessary to dynamic rewriting is carried out to EDID information, And after having rewritten EDID information, moreover it is possible to guarantee that external equipment can successfully read the EDID information rewritten.
Based on above-mentioned analysis, present applicant considers the rewriting that EDID information is controlled by master chip, simply Feasible scheme is, by the I2C access connection EDID chip of master chip, thus realize the rewriting of EDID information, but due to The number of pin of master chip is limited, and there is no extra I2C accesses, accordingly, it is considered to simulate I2C access using DDC access, i.e., When needing to rewrite EDID information, which can be transferred to the write-over instruction of master chip in EDID chip, realize EDID letter The rewriting of breath, when not needing to rewrite EDID information, which is served only for the information needed for transmitting it to external equipment.
But the equipment for supporting Dolby Atmos function in view of access rewrites EDID information, guarantees that this external sets It is standby to read revised EDID information, it is necessary to avoid external equipment and EDID chip in EDID information rewriting process Communication, after EDID information has been rewritten, then realize the communication of itself and EDID chip, therefore obtain the technical solution of the application, An access is drawn on master chip individually to control the address of EDID chip, and setting isolation is single between master chip and EDID chip Member, when needing to rewrite EDID information, the address of master chip control change EDID chip, such port HDMI cannot The address of EDID chip after identification change, external equipment also can not just be communicated with EDID chip；Then, master chip controls Isolated location closure, is connected to its access between EDID chip, so that master chip control EDID information is rewritten.
In the embodiment of the present application, it is that PC display is set that EDID, i.e. expanded display recognition data, which are video standard tissue VESA, The optimization display format set and the data standard designed.EDID includes the basic parameter of display equipment, such as manufacturer, ProductName Title, maximum row field frequency, supported resolution ratio etc. are the data for realizing plug-and-play feature behind, can store in display In dedicated eeprom chip.
The storage mode of EDID includes built-in and external two ways.EDID built-in manner, which refers to, writes on journey for EDID data In sequence, EDID data are written in eeprom chip when smart television direct current is switched on, use when removes eeprom chip The middle EDID data for obtaining smart television.The external mode of EDID, which refers to, directly writes on EDID data external eeprom chip In, under this mode, EDID data can be directly outer by display data channel (Display Data Channel, DDC) Equipment reading is connect, without the control by smart television main program.
In the embodiment of the present application, the life manufacturer of smart television can all lead in order to improve the competitiveness of product on the market A HDMI ports-Extending that HDMI Switch extended chip supports master chip is crossed into multiple ports HDMI.So, it is necessary to HDMI Switch extended chip is extended the port HDMI, illustratively, it is assumed that there are 2 ports HDMI on master chip, it can To be extended to 6 ports HDMI by 2 HDMI Switch extended chips.
In the prior art, CEC standby wakeup function is all supported in the port HDMI of all smart televisions, and right in HDMI specification In the equipment for supporting CEC standby wakeup function, EDID data when standby must be readable.For using HDMI Switch to expand The port HDMI that exhibition chip expands, if EDID data are readable, HDMI Switch extended chip is needed in working condition, but At this time the operating current of HDMI Switch extended chip can reach tens milliamperes or more it is even higher, lead to television standby power consumption It is exceeded, it is unsatisfactory for authentication requesting.EDID data readable solution when standby is exactly to expand in HDMI Switch extended chip The plug-in eeprom chip that EDID data have been written in the port HDMI of exhibition.HDMI Switch extended chip is closed when standby, equipment EDID data are read directly from eeprom chip, realize the function of standby wakeup.But for supporting Doby panorama sound Dolby The tv product of ATMOS function, after supporting the power amplifier of ATMOS to be connected to the port HDMI, smart television is logical to all HDMI EDID data on road in plug-in eeprom chip are rewritten, and representative can support ATMOS function, this functional requirement HDMI The EDID data in channel can must dynamically rewrite.And utilize the EDID data in the channel of HDMI Switch extended chip extension It is to be written on plug-in eeprom chip, and be connected by the channel DDC with master chip.However the channel DDC of master chip is not Has rewriting function, it is impossible to be used in rewrite the operation of EDID data.Therefore, the embodiment of the present application provides embodiment party hereafter Formula, so that EDID data can be rewritten when determining that external equipment supports Doby panorama sound ATMOS ability.
Further, to expansion when the application embodiment provides a kind of equipment for supporting Dolby Atmos function in access EDID data dynamic Improvement, device and the terminal for opening up the channel HDMI, are specifically described as follows:
Embodiment one
Fig. 1 C illustrates a kind of applicable system architecture schematic diagram of the embodiment of the present application and is used for as shown in Figure 1 C EDID data rewriting device with HDMI extended channel includes: main control unit, expanding element, multiple isolated locations, multiple EDID storage unit and multiple ports HDMI；
Main control unit, for controlling reading or rewriting to EDID information in EDID chip, main control unit respectively with extension Unit, isolated location, EDID storage unit are connected.Wherein, the function of main control unit includes: first, when Dolby is supported in access When Atmos external equipment, address change directive can be issued and change multiple EDID access unit address, on the one hand cut off HDMI On the other hand the communication of the corresponding EDID storage unit in port is main control unit to being stored in advance in EDID storage unit EDID information carry out rewrite prepare；Second, the working condition that control signal is used to control isolated location can be issued, so that When needing to rewrite the EDID information stored in EDID storage unit, the data being connected between main control unit and EDID storage unit are passed Defeated access；Third, can be realized the communication between EDID storage unit and main control unit, the EDID in EDID storage unit is changed Information；Fourth, can be realized access conventional equipment and do not need to rewrite EDID information or access to support Dolby Atmos external Equipment and when having rewritten EDID information, external equipment can be communicated by the port HDMI with main control unit, so that outside The data stored in main control unit can be read by connecing equipment.
Expanding element leads to for a channel HDMI between master chip and expanding element to be extended to multiple HDMI and extend Road, wherein the corresponding port HDMI of each HDMI extended channel be connected, wherein expanding element respectively with master control list Member, EDID storage unit, the port HDMI are connected.
Multiple isolated locations are controlled by main control unit, for receiving and responding the close command of main control unit sending, connection Data transmission path between main control unit and EDID storage unit enables main control unit to change institute in EDID storage unit The EDID information of storage.Wherein, each isolated location is connected with EDID storage unit, main control unit respectively；
Multiple EDID storage units, for storing the EDID information of its corresponding HDMI extended channel, wherein each It is hung over outside EDID storage unit on the HDMI extension access between isolated location and expanding element, is controlled by main control unit, and EDID storage unit is connected with isolated location, expanding element, the port HDMI, main control unit respectively；When common external equipment connects After entering the port HDMI, without rewriting to the EDID information stored in EDID storage unit, but EDID storage is directly read The EDID information of unit；After supporting the Dolby Atmos external equipment access port HDMI, main control unit first changes EDID storage The address of unit, i.e. access between the cutting port HDMI and EDID storage unit, so that external equipment can not read EDID and deposit The EDID information of storage unit storage, then main control unit can control isolated location closure, and connection main control unit and EDID storage are single Data transmission path between member, and the EDID information of EDID storage unit storage is rewritten；After the completion of rewriting, master control list Member control EDID access unit address be restored to original address, and control isolated location disconnection, i.e., connection the port HDMI with Access between EDID storage unit, external equipment can read the EDID information rewritten at this time.Wherein, EDID Information includes such as supported resolution ratio, 3D, 4K2K, audio related data, and transmitting terminal can according to obtained information selection The best output format of receiving end identification transmits audio, video data.
Wherein, rewrite EDID information when, if not changing EDID access unit address, also can not just cut off the port HDMI with Access between EDID storage unit, external equipment may be communicated with EDID storage unit, and the EDID information read is still It is the EDID information before modification, equipment is caused to can not work normally, therefore, before the rewriting of EDID information, main control unit control EDID access unit address is changed, the access between the port HDMI and EDID storage unit is cut off, guarantees that EDID information is normal Rewriting and external equipment can successfully read revised EDID information.
In addition, isolated location is in an off state under normal conditions, only the EDID in need to EDID storage unit believes When breath is rewritten, it is controlled by main control unit close command, isolated location can be just closed, and be connected to main control unit and EDID storage is single The data transmission path of member, main control unit can just go to rewrite EDID information.After the completion of rewriting, isolated location can then break It opens, is restored to original state.
It is worth explanation, realizes Dolby Atmos effect, need to access multiple external equipments, thus need to every EDID storage unit all carries out the rewriting of EDID information all the way, and main control unit successively controls each EDID unit and rewritten, Specific control sequence can according to the actual situation depending on, here without limitation.Further, external to set after EDID has rewritten Standby to need to read the EDID information rewritten, exemplary as follows to give two kinds of implementations: one is controls to have rewritten 1 tunnel After EDID information, the EDID memory unit address that main control unit controls the road is restored to original address, and controls the road Isolated location disconnect, then the corresponding external equipment in the road can read revised EDID information；Main control unit is gone again Control another way rewrites its corresponding EDID information, and then controlling corresponding EDID storage unit and isolated location again makes external set It is standby to read revised EDID information, the EDID information of all EDID storage units has successively been rewritten in this way.
After another kind is the EDID information that main control unit controls the storage of all EDID storage units, then control all EDID Access unit address is restored to original address together, and controls all isolated locations and disconnect, and such external equipment can To read revised EDID information.Compared to the first, implementing for second may be easy, logic simple one A bit, because the time of EDID rewriting is shorter, so can be achieved on the second way time is slightly longer.
The port HDMI, for can establish between external equipment and main control unit respectively, is external after external equipment insertion Communication between equipment and EDID storage unit, wherein each port HDMI is connected with corresponding EDID storage unit；When When external equipment is accessed in the port HDMI, main control unit can detect the type of external equipment and external equipment and can read EDID and deposit The EDID information of storage unit storage, judges whether the device supports the external equipment of insertion to work normally.Optionally, it detects external Equipment and judge that external equipment type can refer to the prior art.Wherein, external equipment can be the function for supporting ATMOS function The equipment such as rate amplifier, DVD, VCD.
Wherein, the HDMI access between main control unit and expanding element can be extended by expanding element, be obtained more A HDMI extends access, and the number of extension access is determined by the hardware condition of expanding element, if expanding element use Extended chip has the 1 N number of output of input, correspondingly, 1 HDMI access can be at most extended to N number of HDMI extension access； If expecting 2N HDMI extension access, then just needing using two extended chips, the connection relationship of the two extended chips The connection relationship of an extended chip can be referred to.In addition, the hardware design of master chip determines its HDMI version that can be supported, Mainstream chip generally has there are two HDMI access on the market, and the above-mentioned HDMI access to master chip is extended suitable for all versions This HDMI access, can be designed how many a HDMI accesses according to actual needs in this way, to select to expand using how many Exhibition chip is extended.
In the embodiment of the present application, the HDMI original channel between main control unit and expanding element is extended to multiple expanding elements HDMI extended channel between the port HDMI, and EDID storage unit is hung with outside on the HDMI extended channel, it is deposited in EDID Isolated location is provided between storage unit and main control unit, main control unit is also connected with EDID storage unit；When access is supported After the external equipment access of Dolby Atmos, main control unit controls EDID memory unit address and rewrites, to cut off external equipment With the communication of EDID storage unit, prevent during EDID information is rewritten, external equipment, which is misread, gets former EDID information；Separately Outside, main control unit control isolated location closure, is connected to the access of main control unit and EDID storage unit, and main control unit believes EDID Breath is rewritten, and such external equipment can read the EDID information rewritten, to realize Dolby Atmos effect.
Fig. 1 D illustrates a kind of applicable system architecture schematic diagram of the embodiment of the present application, as shown in figure iD, including Master chip 10, HDMI Switch extended chip 20.The master chip 10 has a port HDMI, by connecting HDMI Switch Master chip 20 is extended by the HDMI ports-Extending into 3 ports HDMI: HDMI first port 301,302 and of HDMI second port HDMI third port 303.
Wherein, each port HDMI extended in 3 ports HDMI of generation can pass through data display channel 20 extended chip of (Display Data Channel, DDC) 501 and HDMI Switch carries out the interaction of message, HDMI Switch extended chip 20 and master chip 10 carry out the interaction of message by the channel DDC 601.The channel DDC be the receiving end HDMI and The channel of the interacting message of transmitting terminal, transmitting terminal read the EDID number being stored in the eeprom chip of receiving end by the channel DDC According to obtaining the basic parameter of receiving end, such as supported resolution ratio, 3D, 4K2K, audio related data.Transmitting terminal according to The best output format transmission audio, video data of receiving end identification is capable of in the information selection arrived.
Wherein, each port HDMI extended in 3 ports HDMI of generation can be by minimizing differential signal transmission The channel 502 (Time Minimized Differential Signal, TMDS) and 20 extended chip of HDMI Switch carry out The transmission of data packet, HDMI Switch extended chip 20 and master chip 10 carry out the transmission of data packet by the channel TMDS 602.
Wherein, each port HDMI extended in 3 ports HDMI of generation can be by hot plug (Hot Plug Detect, HPD) adjustment of the reception master chip 10 of channel 503 to each port HDMI hot pluggable condition, each channel HPD 503 can To be connected with the third pin 103 on master chip 10.The port HDMI has warm connection function, is the heat in order to realize the port HDMI Plug design.When transmitting terminal accesses receiving end, receiving end can respond HPD signal to transmitting terminal, and then transmitting terminal will start The channel DDC then carries out high-bandwidth digital content protection technology (High- to read the EDID data of receiving end Bandwidth Digital Content Protection, HDCP) interaction.If transmitting terminal and receiving end authenticate successfully, Then work normally.
In foregoing description, receiving end can be the terminal devices such as smart television, computer, and transmitting terminal, which can be, supports ATMOS The external equipments such as the power amplifier of function, DVD, VCD.
It, can be with a plug-in EDID chip, each EDID core on the channel DDC of each port HDMI in the embodiment of the present application First pin 101 of one end connection master chip 10 of piece, first pin 101 allow each EDID chip according to master chip Instruction update EDID chip address.Each EDID chip other end can connect corresponding isolation circuit, in isolation circuit In the case where connection, each EDID chip can be connected serially in I2C bus 40, and I2C bus 40 is connected to the second of master chip 10 Pin 102.The second pin 102 allows each EDID chip to update the number in EDID chip according to the instruction of master chip According to.Wherein, the main control unit in 10 corresponding diagram 1C of master chip, the extension list in 20 corresponding diagram 1C of HDMI Switch extended chip Member；EDID storage unit in EDID chip corresponding diagram 1C；Isolated location in isolation circuit corresponding diagram 1C.
In the embodiment of the present application, 3 ports HDMI for extending generation can have audio return with only one port HDMI Channel (Audio Return Channel, ARC) function can also have with the port HDMI of multiple ports HDMI or whole ARC function.The difference of the port HDMI with ARC function and the port HDMI without ARC function are as follows: with ARC function The port HDMI has an ARC voice transmission to be connected to master chip.
Doby panorama sound Dolby ATMOS is completely new camera audio platform, it can show dynamic in conjunction with substance film Sound effect, more really build audio from the distant to the near.Doby panorama sound is proposed dynamic object and plays sound channel Brand-new audio mixing harmony tone lateralization mode, enables spectators are comprehensive to be surrounded by sound, it is ensured that in any environment and different loudspeakers Under configuration, the effect imagined closest to author is played as far as possible.
Connection supports the port of the external equipment of Doby panorama sound ATMOS ability to can be the end HDMI with ARC function Mouthful, illustrate how master chip detects the external equipment support Doby panorama sound ATMOS of access below: having first detected whether external Equipment insertion, such as DVD, support the power amplifier etc. of ATMOS ability, the method for detecting whether the insertion of external equipment It is a voltage pin by master chip, for example when insertion external equipment, the voltage for having a 5V is known to master chip Not, external equipment is after reading the address EDID, can provide a physical address to master chip, and matching logic address.Master chip One can be sent and instructed and judge whether external equipment supports ARC function, if supporting, external equipment feeds back an on/off Answer (feedback off illustrates that equipment supports this function, but closes), then the port HDMI for connecting external equipment is put as power The delivery outlet of big device, if do not supported, then equipment is fed back a Feature not support and is replied, then the port the HDMI conduct The normal channel HDMI.
Fig. 2 illustrates a kind of flow diagram of the method for the applicable EDID data rewriting of the embodiment of the present application, As shown in Figure 2, comprising:
Step 201, determine that the external equipment of a port the HDMI connection in N number of port HDMI of display equipment supports Du Than panorama sound ATMOS ability, wherein N is the integer greater than 1, shows that the HDMI SWITCH module of equipment connects N number of EDID core Piece, each EDID chip in N number of EDID chip are connect with master chip by the channel DDC, N number of port HDMI and N number of EDID core Piece corresponds；
Step 202, it is connect, is updated each in N number of EDID chip with N number of EDID chip by the first pin of master chip The address of EDID chip, wherein the address of any two EDID chips in updated N number of EDID chip is different；
Step 203, it is connect by the second pin of master chip with N number of EDID chip, increases into N number of EDID chip and be used for The data block for the audio format information that storage ATMOS is supported.
In the embodiment of the present application, when a port HDMI in N number of port HDMI that terminal device determines display equipment connects The external equipment connect supports Doby panorama sound ATMOS ability, wherein N is the integer greater than 1, shows the HDMI SWITCH of equipment Module connects N number of EDID chip, and each EDID chip in N number of EDID chip is connect with master chip by the channel DDC, N number of The port HDMI and N number of EDID chip correspond；It can be connect first by the first pin of master chip with N number of EDID chip, Update the address of each EDID chip in N number of EDID chip, wherein any two EDID cores in updated N number of EDID chip The address of piece is different；It can be connect by the second pin of master chip with N number of EDID chip, increase into N number of EDID chip and use In the data block for the audio format information that storage ATMOS is supported.In this way, determining external equipment support Doby panorama sound When ATMOS ability, EDID data can be rewritten.
In the embodiment of the present application, step 201 to step 203 be can be by the terminal of support Doby panorama sound ATMOS ability Equipment executes, and terminal device can be smart television, laptop, desktop computer etc..Optionally, display equipment can be with It is a component part in terminal device.In step 201, the external equipment of Doby panorama sound ATMOS ability is supported in connection That port HDMI is the port HDMI with ARC function.
In the embodiment of the present application, if master chip supports each port HDMI in 3 ports HDMI generated by extension The external equipment of connection supports Doby panorama sound ATMOS function, and the plug-in EDID chip in the channel DDC of each port HDMI On be stored with the data block for indicating the ATMOS function, then can be by the channel HPD that the third pin of master chip connects to HDMI Port sends high level, and after external equipment receives high level, the number in corresponding EDID chip can be read by the channel DDC According to block, the data block for being stored in the EDID chip and indicating the ATMOS function is determined, then HDMI can be passed through by the channel TMDS Switch extended chip and master chip complete the interaction of data.
In step 201, when the external equipment of support Doby panorama sound ATMOS is inserted into N number of port HDMI of display equipment In a port HDMI when, terminal device can detecte the external equipment, by the channel DDC to external equipment send one Information reporting instruction, information reporting instruction is for so that the external equipment reports parameter to terminal device.External equipment passes through The channel DDC reports parameter to master chip.Master chip determines that the external equipment supports Doby panorama sound ATMOS ability.Alternatively, main core Piece, which can send one and instruct, judges whether external equipment supports ATMOS ability, if supporting, external equipment feeds back to main core Piece one specific response, the response indicate that external equipment supports ATMOS ability.
Optionally, after a port HDMI in N number of port HDMI that external equipment is inserted into display equipment, main core Before piece determines that the external equipment supports Doby panorama sound ATMOS ability, external equipment can pass through HPD channel reception to main core The high level that piece is sent, external equipment, which is primarily determined, can carry out data interaction to master chip, and external equipment is read by the channel DDC The data block in corresponding EDID chip is taken, determining does not have to store the audio format that ATMOS is supported in corresponding EDID chip The data block of information, then external equipment and master chip are without data interaction.At this point, the EDID chip that each port HDMI is plug-in It is in parallel.
It determines that external equipment supports Doby panorama sound ATMOS ability in the master chip of terminal device, needs in N number of EDID core Increase the data block for storing the audio format information that ATMOS is supported in piece.In a kind of optional embodiment, Ke Yitong Cross the default electricity of the corresponding isolation circuit input first of each EDID chip of the third pin of master chip into N number of EDID chip It is flat, wherein the first predetermined level is used to that the corresponding isolation circuit of each EDID chip in N number of EDID chip to be connected.
Specifically, N number of EDID chip and N number of isolation circuit correspond, as shown in Figure 1,3 plug-in EDID chips and 3 isolation circuits correspond.For each EDID chip in N number of EDID chip, the corresponding isolation circuit of EDID chip First end is connect with EDID chip, and the second end of the corresponding isolation circuit of EDID chip and the second pin of master chip connect, The connection of the third pin of EDID chip corresponding isolation circuit third end and master chip.
After the master chip of terminal device determines that external equipment supports Doby panorama sound ATMOS ability, it can be drawn by third The channel HPD of foot connection sends low level (the first i.e. above-mentioned predetermined level) to each port HDMI, the insertion port HDMI After external equipment receives low level, determine that discord master chip carries out data interaction.Meanwhile each of N number of EDID chip The corresponding isolation circuit of EDID chip receives low level, and isolation circuit is switched on, and each EDID chip passes through corresponding isolation Circuit and I2C bus are connected in series, i.e., each EDID chip in N number of EDID chip is connected with second pin by I2C bus Connection.
A kind of possible circuit structure diagram of isolation circuit is described below, it is suitable that Fig. 3 illustrates the embodiment of the present application A kind of schematic diagram of isolation circuit, as shown in figure 3, including drive module and communication module.The drive module be by power supply, Triode 5 and 4 resistance (R5, R6, R7 and R8) composition, 405 ends are the third end connecting with the third pin of master chip, also It is the isolation circuit connection channel HPD and the low level port for receiving master chip transmission.Resistance R6 be used for current limliting, resistance R7 and Resistance R8 when 405 ports receive high level, is connected, power supply passes through after R7 for dividing between 2,3 poles of triode 5 Ground connection.Low level is received in 405 ports, is not turned between 2,3 poles of triode 5, power supply inputs electricity to communication module circuitry Isolation circuit is connected in stream.The communication module is made of bidirectional data line SDA and clock line SCL.Wherein, bidirectional data line is It is made of 402 ends, 404 ends, triode 3 and triode 4, for transmitting data.Clock line is by 401 ends, 403 ends, three poles What pipe 1 and triode 2 formed.401 ends and 402 ends constitute isolation circuit corresponding with the EDID chip of EDID chip connection First end, 403 ends and 404 ends constitute the second end connecting with I2C bus (i.e. second pin).
In the embodiment of the present application, need to increase in N number of EDID chip the audio format letter supported for storing ATMOS The data block of breath can pass through the corresponding isolation electricity of each EDID chip of the third pin of master chip into N number of EDID chip Isolation circuit is connected in road input low level, can then to be increased into EDID chip for storing by bidirectional data line The data block for the audio format information that ATMOS is supported is prepared.And stored in increase or deletion EDID chip It, can be by the third pin of master chip into N number of EDID chip after the data block for the audio format information that ATMOS is supported The corresponding isolation circuit input high level of each EDID chip, is not turned on isolation circuit, it is ensured that every the channel DDC of EDID chip Independence, will not interfere with each other.
Optionally, bidirectional data line SDA and clock line SCL can be respectively using the NPN pipe parallel connection of two different directions, really The two-way communication of I2C data is protected, while the capacitive reactance of triode is smaller, it is smaller on signal quality influence, and cost hands over signal metal-oxide-semiconductor It is cheap.
After the master chip of terminal device determines that external equipment supports Doby panorama sound ATMOS ability, terminal device can lead to The first pin for crossing master chip is connect with N number of EDID chip, updates the address of each EDID chip in N number of EDID chip.It is a kind of In optional embodiment, each EDID chip in N number of EDID chip by the corresponding address of EDID chip rewrite circuit with The connection of first pin；N number of address is rewritten each address rewriting circuit on one side in circuit and is connect with the first pin, the other end and ground Rewrite the preset address pin connection of the corresponding EDID chip of circuit in location；Wherein, each EDID chip in N number of EDID chip is set A preset address pin is set, corresponding two addresses of the preset address pin of any two EDID chips are not in N number of EDID chip Together.
When EDID chip does not need modification data block, the address of each chip according to HDMI standardize in regulation can To be consistent, for example, 0XA0, but to realize the rewriting with the data block in I2C bus all the way in multiple EDID chips, then often The address of a EDID chip must be inconsistent, to allow master chip to distinguish different EDID chips.Optionally, EDID Chip can be the eeprom chip of storage EDID data, be also possible to other storage chips.If EDID chip can be storage The eeprom chip of EDID data, then eeprom chip has tri- address wires of A0, A1 and A2, and the address composition table of EEPROM is shown in Table 1.First four of table be binary number 1010, be converted to hexadecimal number be A, variable address bit be A2, A1, A0 and Last read-write position, when not needing modification, tri- address wires of A0, A1 and A2 are all grounded.
The address of eeprom chip forms table
1 0 1 0 A2 A1 A0 R/W
A kind of possible address rewriting circuit module is described below, Fig. 4 illustrates what the embodiment of the present application was applicable in The schematic diagram of circuit module is rewritten in a kind of address, as shown in figure 4, the address rewrite circuit module include 3 EDID chips and The corresponding rewriting circuit of EDID chip.Each EDID chip in N number of EDID chip rewrites circuit and the first pin by address It is connected in series, pin 1, pin 2 and the pin 3 of each EDID chip are address pin.Pin 4 is grounded, and pin 5 and pin 6 divide Not Lian Jie isolation circuit bidirectional data line and clock line, pin 7 be grounded, indicate that the chip can be read and write, pin 8 connects electricity Source.
It is a kind of optionally to update in N number of EDID chip in the embodiment of the address of each EDID chip, passing through main core The corresponding address of each EDID chip of first pin of piece into N number of EDID chip rewrites circuit and inputs third predetermined level, Wherein, third predetermined level is used to that the preset address pin of each EDID chip in N number of EDID chip to be made to be in ungrounded shape State.
In the embodiment of the present application, by 101 end input low levels of the first pin of master chip into Fig. 4, triode 2, it cannot be connected between 3 poles, then voltage source gives the pin 2 and EDID chip 3 of the pin 1 of EDID chip 1, EDID chip 2 respectively Pin 3 high level the preset address position of EDID chip (input) is set.Since EDID chip others address bit is grounded, then The address bit of EDID chip 1 is 0010, and it is 2 that Binary Zero 010, which is converted into the decimal system, and similarly, then the address bit of EDID chip 2 is 0100, Binary Zero 100 be converted into the decimal system be 4, then the address bit of EDID chip 3 be 1000, binary one 000 be converted into ten into It is made as 8.Therefore, the address of EDID chip 1 is updated to 0XA2 by 0XA0, and the address of EDID chip 1 is updated to 0XA4 by 0XA0, The address of EDID chip 1 is updated to 0XA8 by 0XA0.
Optionally, Fig. 4 that the method for modifying the address of each EDID chip is not limited to the example above optionally may be used also To connect by N number of voltage source with the different pins of each EDID chip, the rewriting of N number of EDID chip address is realized.
Terminal device updates the address of each EDID chip in N number of EDID chip, and the corresponding isolation of each EDID chip After circuit is switched on, in a kind of optional embodiment, N number of isolation circuit that the second pin of master chip connects can be passed through Each EDID chip into N number of EDID chip increases the data block for storing the audio format information that ATMOS is supported.It is main The second pin of chip is connected by the clock line of the corresponding isolation circuit of each EDID chip with bidirectional data line shown in fig. 5 401 ends and 402 ends.Wherein, the connection of 401 ends is clock line, and the connection of 402 ends is bidirectional data line.
Resistance R10 and resistance R11 in Fig. 4 are pull-up resistor, which is to cooperate second on master chip The low and high level of pin input, to increase the data block of audio format information that each EDID chip storage ATMOS is supported. Whether in first method, pull-up resistor is to access the address always to rewrite in circuit module, extraly accessed by master chip The case where pull down resistor makes the level of input pin 5 and pin 6 that low and high level be presented.In second method, pull-up resistor is simultaneously Not instead of always, do not access the ground to rewrite in circuit module, alternately access or do not access the address and rewrite circuit module In, so that the case where low and high level is presented in the level of input pin 5 and pin 6.
It is a kind of after increasing the data block for storing the audio format information that ATMOS is supported into N number of EDID chip In optional embodiment, inputted by the corresponding isolation circuit of each EDID chip of the third pin into N number of EDID chip Second predetermined level (i.e. high level), wherein the second predetermined level is used to disconnect each EDID chip pair in N number of EDID chip The isolation circuit answered.Circuit input is rewritten by the corresponding address of each EDID chip of first pin into N number of EDID chip 4th predetermined level (high level), wherein the 4th predetermined level is used to make the default of each EDID chip in N number of EDID chip Address pin is in ground state.
If it is determined that the external equipment of a port the HDMI connection in N number of port HDMI of display equipment is unplugged, then may be used To delete the data for storing the audio format information that ATMOS is supported in each EDID chip according to the embodiment of above-mentioned introduction Block.Specifically, the corresponding isolation circuit input of each EDID chip by the third pin of master chip into N number of EDID chip Low level, isolation circuit are switched on, and each of N number of EDID chip is modified by the first pin input low level of master chip Each EDID chip is deleted by isolation circuit by the I2C bus that the second pin of master chip connects in the address of EDID chip The data block for the audio format information that middle storage ATMOS is supported.Pass through each EDID of the third pin into N number of EDID chip The corresponding isolation circuit input high level of chip disconnects isolation circuit.By the first pin to each of N number of EDID chip Circuit input high level is rewritten in the corresponding address of EDID chip, for making the default of each EDID chip in N number of EDID chip Address pin is in ground state.
An application scenarios are described below, such as 5 show a kind of application scenarios schematic diagram provided by the embodiments of the present application, wrap Smart television 501 is included, and the screen 5012 positioned at smart television 5011, the port master chip 5013 and 3 HDMI: the first end HDMI Mouth D1 5014, the 2nd port HDMI D2 5015 and the 3rd port HDMI D3 5016.Wherein, the first port HDMI D1 5014 is With ARC function, the 2nd port HDMI D2 5015 and the 3rd port HDMI D3 5016 can have ARC function, can also be with Without ARC function.2nd connection of the port HDMI D2 5015 provides the DVD of audio resource or audio resource, inputs a signal into To master chip 5012, master chip 5012 exports image to screen 5012, if master chip 5013 passes through the first port HDMI D1 5014 detect connection be support Doby panorama sound power amplifier 5017, then can by the 2nd port HDMI D2 5015 to DVD5018 sends instruction, it is desirable that the audio resource that DVD5018 is sent to master chip 5013 is and the power amplifier of supporting Doby panorama sound Matched audio resource.Audio resource is sent to power amplifier 5017 and played out by subsequent master chip 5013.
Based on above embodiments and same idea, Fig. 6 shows a kind of EDID data rewriting provided by the embodiments of the present application Device structural schematic diagram, as shown in fig. 6, the device 500 of EDID data rewriting can include determining that unit 6011, first control Unit 6012 processed and the second control unit 6013.
A kind of device of EDID data rewriting is provided in the embodiment of the present application, determination unit in the device is aobvious for determining Show that the external equipment of a port the HDMI connection in N number of port HDMI of equipment supports Doby panorama sound ATMOS ability, In, N is the integer greater than 1, shows that the HDMI SWITCH module of equipment connects N number of EDID chip, every in N number of EDID chip A EDID chip is connect with master chip by the channel DDC, and N number of port HDMI and N number of EDID chip correspond；First control is single Member, the external equipment for a port the HDMI connection in N number of port HDMI that determination unit determines display equipment are supported In the case where Doby panorama sound ATMOS ability, it is connect by the first pin of master chip with N number of EDID chip, updates N number of EDID The address of each EDID chip in chip, wherein the address of any two EDID chips in updated N number of EDID chip is not Together；Second control unit, for a port the HDMI connection in N number of port HDMI that determination unit determines display equipment In the case that external equipment supports Doby panorama sound ATMOS ability, connected by the second pin of master chip and N number of EDID chip It connects, increases the data block for storing the audio format information that ATMOS is supported into N number of EDID chip.
In the embodiment of the present application, when determine display equipment N number of port HDMI in a port HDMI connection it is external Equipment supports Doby panorama sound ATMOS ability, wherein N is the integer greater than 1, shows the HDMI SWITCH module connection of equipment N number of EDID chip, each EDID chip in N number of EDID chip are connect with master chip by the channel DDC, N number of port HDMI and N A EDID chip corresponds；It can be connect first by the first pin of master chip with N number of EDID chip, update N number of EDID The address of each EDID chip in chip, wherein the address of any two EDID chips in updated N number of EDID chip is not Together；It can be connect by the second pin of master chip with N number of EDID chip, be increased into N number of EDID chip for storing ATMOS The data block for the audio format information supported.In this way, when determining that external equipment supports Doby panorama sound ATMOS ability, it can To rewrite EDID data.
In a kind of optional embodiment, each EDID chip in N number of EDID chip is connect with the first pin serial connection； And/or；Each EDID chip in N number of EDID chip is connected in series with second pin by I2C bus.
In a kind of optional embodiment, further include with N number of EDID chip N number of isolation circuit correspondingly, for N number of Each EDID chip in EDID chip, the first end of the corresponding isolation circuit of EDID chip are connect with EDID chip, EDID core The second end of the corresponding isolation circuit of piece is connect with second pin, EDID chip corresponding isolation circuit third end and master chip The connection of third pin；Second control unit, is used for: passing through each EDID of the third pin of master chip into N number of EDID chip The corresponding isolation circuit of chip inputs the first predetermined level, wherein the first predetermined level is every in N number of EDID chip for being connected The corresponding isolation circuit of a EDID chip；The N number of isolation circuit connected by the second pin of master chip is into N number of EDID chip Each EDID chip increase the data block for storing the audio format information that ATMOS is supported.
In a kind of optional embodiment, the second control unit is also used to: through third pin into N number of EDID chip The corresponding isolation circuit of each EDID chip input the second predetermined level, wherein the second predetermined level is for disconnecting N number of EDID The corresponding isolation circuit of each EDID chip in chip.
It further include that circuit is rewritten in N number of address correspondingly with N number of EDID chip in a kind of optional embodiment, it is N number of Each EDID chip in EDID chip is rewritten circuit by the corresponding address of EDID chip and is connect with the first pin；N number of address The each address rewriting circuit on one side rewritten in circuit is connect with the first pin, other end EDID corresponding with address rewriting circuit The preset address pin of chip connects；Wherein, a preset address pin, N is arranged in each EDID chip in N number of EDID chip The corresponding two address differences of the preset address pin of any two EDID chips in a EDID chip；First control unit is used for: It is pre- that circuit input third is rewritten by the corresponding address of each EDID chip of the first pin of master chip into N number of EDID chip If level, wherein third predetermined level is used to make the preset address pin of each EDID chip in N number of EDID chip to be in non- Ground state.
In a kind of optional embodiment, first control unit is also used to: through the first pin into N number of EDID chip The corresponding address of each EDID chip rewrite circuit and input the 4th predetermined level, wherein the 4th predetermined level is N number of for making The preset address pin of each EDID chip in EDID chip is in ground state.
EDID data rewriting device provided by the embodiments of the present application, which is specifically described, can refer to EDID provided by the above embodiment Data rewriting method repeats no more herein.
It should be noted that being schematical, only a kind of logic function to the division of unit in the embodiment of the present application It divides, there may be another division manner in actual implementation.Each functional unit in the embodiment of the present application can integrate one In a processing unit, it is also possible to each unit and physically exists alone, one can also be integrated in two or more units In unit.Above-mentioned integrated unit both can take the form of hardware realization, can also be real in the form of software functional units It is existing.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real Now, it when being realized using software program, can entirely or partly realize in the form of a computer program product.Computer program Product includes one or more instructions.When loading on computers and executing computer program instructions, entirely or partly generate According to the process or function of the embodiment of the present application.Computer can be general purpose computer, special purpose computer, computer network or Other programmable devices of person.Instruction can store in computer storage medium, or from a computer storage medium to another One computer storage medium transmission, for example, instruction can be logical from a web-site, computer, server or data center Wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode are crossed to another One web-site, computer, server or data center are transmitted.Computer storage medium can be computer and can deposit Any usable medium taken either includes that the data storages such as one or more usable mediums integrated server, data center are set It is standby.Usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape, magneto-optic disk (MO) etc.), optical medium (for example, CD, DVD, BD, HVD etc.) or semiconductor medium (such as ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), Solid state hard disk (Solid State Disk, SSD)) etc..
It should be understood by those skilled in the art that, the embodiment of the present application can provide as the production of method, system or computer program Product.Therefore, in terms of the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and hardware Embodiment form.Moreover, it wherein includes computer available programs generation that the embodiment of the present application, which can be used in one or more, The meter implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code The form of calculation machine program product.
The embodiment of the present application is referring to the method, equipment (system) and computer program product according to the embodiment of the present application Flowchart and/or the block diagram describe.It should be understood that can be by each process in instruction implementation flow chart and/or block diagram And/or the combination of the process and/or box in box and flowchart and/or the block diagram.These instructions be can provide to general meter Calculation machine, special purpose computer, Embedded Processor or other programmable data processing devices processor to generate a machine, make It obtains and is generated by the instruction that computer or the processor of other programmable data processing devices execute for realizing in flow chart one The device for the function of being specified in a process or multiple processes and/or one or more blocks of the block diagram.
These instructions, which may also be stored in, is able to guide computer or other programmable data processing devices work in a specific way Computer-readable memory in so that it is stored in the computer readable memory instruction generate include command device system Product are made, which realizes in one or more flows of the flowchart and/or one or more blocks of the block diagram Specified function.
These instructions also can be loaded onto a computer or other programmable data processing device so that computer or other Series of operation steps are executed on programmable device to generate computer implemented processing, thus in computer or other are programmable The instruction that executes in equipment is provided for realizing in one box of one or more flows of the flowchart and/or block diagram or more The step of function of being specified in a box.
Obviously, those skilled in the art can carry out various modification and variations without departing from this Shen to the embodiment of the present application Spirit and scope please.In this way, if these modifications and variations of the embodiment of the present application belong to the claim of this application and its wait Within the scope of technology, then the application is also intended to include these modifications and variations.

Claims (9)

1. a kind of method of EDID data rewriting, which is characterized in that the described method includes:
Determine that the external equipment of a port the HDMI connection in N number of port HDMI of display equipment supports Doby panorama sound ATMOS ability, wherein the N is the integer greater than 1, and the HDMI SWITCH module of the display equipment connects N number of EDID core Piece, each EDID chip in N number of EDID chip are connect with master chip by the channel DDC, N number of port HDMI and institute N number of EDID chip is stated to correspond；
It is connect, is updated each in N number of EDID chip with N number of EDID chip by the first pin of the master chip The address of EDID chip, wherein the address of any two EDID chips in updated N number of EDID chip is different；
It is connect, is increased into N number of EDID chip described for storing with N number of EDID chip by the second pin of the master chip The data block for the audio format information that ATMOS is supported.
2. the method as described in claim 1, which is characterized in that each EDID chip in N number of EDID chip with it is described The connection of first pin serial connection；
Each EDID chip in N number of EDID chip is connected in series with the second pin by I2C bus.
3. the method as described in claim 1, which is characterized in that N number of EDID chip and N number of isolation circuit correspond, For each EDID chip in N number of EDID chip, the first end of the corresponding isolation circuit of the EDID chip with it is described The second end of the connection of EDID chip, the corresponding isolation circuit of the EDID chip is connect with the second pin, the EDID core Piece corresponding isolation circuit third end is connect with the third pin of the master chip；
The second pin by the master chip is connect with N number of EDID chip, is increased into N number of EDID chip for storing The data block for the audio format information that the ATMOS is supported, comprising:
It is defeated by each EDID chip corresponding isolation circuit of the third pin of the master chip into N number of EDID chip Enter the first predetermined level, wherein first predetermined level is used to that each EDID chip pair in N number of EDID chip to be connected The isolation circuit answered；
Each EDID core of the N number of isolation circuit connected by the second pin of the master chip into N number of EDID chip Piece increases the data block for storing the audio format information that the ATMOS is supported.
4. method as claimed in claim 3, which is characterized in that the second pin by the master chip and N number of EDID Chip connection, into N number of EDID chip increase for store the audio format information that the ATMOS is supported data block it Afterwards, further includes:
It is pre- by the corresponding isolation circuit input second of each EDID chip of the third pin into N number of EDID chip If level, wherein second predetermined level is used to disconnect the corresponding isolation of each EDID chip in N number of EDID chip Circuit.
5. the method as described in claim 1, which is characterized in that each EDID chip in N number of EDID chip passes through institute The corresponding address rewriting circuit of EDID chip is stated to connect with first pin；Each address that N number of address is rewritten in circuit changes Write circuit one end is connect with first pin, the preset address of other end EDID chip corresponding with address rewriting circuit Pin connection；Wherein, a preset address pin, N number of EDID is arranged in each EDID chip in N number of EDID chip The corresponding two address differences of the preset address pin of any two EDID chips in chip；
First pin by the master chip is connect with N number of EDID chip, is updated each in N number of EDID chip The address of EDID chip, comprising:
Electricity is rewritten by the corresponding address of each EDID chip of the first pin of the master chip into N number of EDID chip Road inputs third predetermined level, wherein the third predetermined level is used to make each EDID chip in N number of EDID chip Preset address pin be in ungrounded state.
6. method as claimed in claim 5, which is characterized in that the second pin by the master chip and N number of EDID Chip connection, into N number of EDID chip increase for store the audio format information that the ATMOS is supported data block it Afterwards, further includes:
Circuit input the is rewritten by the corresponding address of each EDID chip of first pin into N number of EDID chip Four predetermined levels, wherein the 4th predetermined level be used to make each EDID chip in N number of EDID chip defaultly Location pin is in ground state.
7. a kind of EDID data rewriting device, which is characterized in that described device includes: main control unit, expanding element, multiple isolation Unit, multiple EDID storage units and multiple ports HDMI；
The main control unit is connected with the expanding element, multiple isolated locations, multiple EDID storage units respectively, For controlling reading or rewriting to EDID information in multiple EDID storage units, and the multiple EDID storage lists of control It rewrites the address of member；
The expanding element is connected with the main control unit, multiple ports HDMI respectively, for by the main control unit with HDMI original channel between the expanding element is extended, and is obtained between the expanding element and multiple ports HDMI Multiple HDMI extended channels；
It is any EDID storage unit and the main control unit, the expanding element, the corresponding isolated location, corresponding The port HDMI is connected, for storing the EDID information of the corresponding HDMI extended channel；
Any isolated location is connected with the main control unit, the corresponding EDID storage unit respectively, for when correspondence The EDID storage unit in EDID information when being rewritten, be connected to the corresponding main control unit and corresponding institute State the HDMI extended channel between EDID storage unit.
8. device according to claim 7, which is characterized in that the main control unit is also used to detect multiple ends HDMI The type of multiple external equipments of mouth access, when detecting there are when the first kind in multiple external equipments, control cutting is more The HDMI extended channel between a port HDMI and the corresponding EDID storage unit, and control to corresponding institute The EDID information stored in EDID storage unit is stated to be rewritten；
When detecting multiple external equipments is all Second Type, control be connected to multiple ports HDMI with it is corresponding described The HDMI extended channel between EDID storage unit, multiple external equipments can read corresponding EDID storage unit The EDID information of middle storage.
9. device according to claim 8, which is characterized in that multiple isolated locations are also used to:
When multiple isolated locations are connected to the HDMI between the main control unit and the corresponding EDID storage unit When extended channel, the EDID information in multiple EDID storage units is rewritten in the main control unit control；
When multiple isolated locations cut off the HDMI between the main control unit and the corresponding EDID storage unit When extended channel, multiple external equipments can be communicated with the corresponding EDID storage unit, read the corresponding expansion Open up the EDID information in the channel HDMI.
CN201810885739.3A 2018-08-06 2018-08-06 Method, device and storage medium for rewriting EDID data Active CN109120973B (en)

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