CN101282444B - Receiving switching mechanism, TV set containing the same - Google Patents
Receiving switching mechanism, TV set containing the same Download PDFInfo
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- CN101282444B CN101282444B CN2008100148431A CN200810014843A CN101282444B CN 101282444 B CN101282444 B CN 101282444B CN 2008100148431 A CN2008100148431 A CN 2008100148431A CN 200810014843 A CN200810014843 A CN 200810014843A CN 101282444 B CN101282444 B CN 101282444B
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Abstract
The invention discloses a receiving switching device, a television comprising the receiving switching device and a television receiving switching method, the technical solution is: the receiving switching device, including: a receiving device for receiving digital signals transmitted from the signal source; a storage device for storing pre-edited expansion display identified data; a switching device calls the expansion display identified data from the storage device according to the digital signal received by the receiving device, which performs address assignment to the received digital signal and outputs expansion display identified data as well as digital signals according to the receiving device.
Description
Technical field
The present invention relates to a kind ofly receive switching device shifter, comprise that the television set of described reception switching device shifter and TV connect
Receive changing method.
Background technology
The standard battle of high-definition digital interface grows in intensity, and old and feeble DVI (digital visual interface), vigorous HDMI (HDMI (High Definition Multimedia Interface)) and the DisplayPort (display interface of future generation) that has a bright future become the leading role of current competition.Along with the development of full HD technology, the HDMI interface occupies vantage point gradually on market.The data of In-Stat show that DVI equipment is 1.12 hundred million ones shipment amount in 2007, and by 2011, this numeral just will slide to 3,000,000 ones down rapidly.By contrast, HDMI equipment is 1.43 hundred million ones in the shipment amount in whole world last year, has occupied dominant position.From technological layer, DVI can only transmit vision signal, and audio frequency is wanted other individual processing.Compare with DVI, HDMI and DisplayPort have more characteristic such as high bandwidth and resolution, can also integrate video transmission and audio transmission, simplify cable greatly and connect setting.And the more important thing is that HDMI can compatible DVI, as long as increase a transducer, just both can connect.Just because of HDMI to the compatibility of DVI, has caused a lot of complete-system vendors just to abandon DVI after the HDMI interface is installed.
Originally the high-definition digital interface standard should have four bursts of force, is respectively HDMI, DisplayPort, DVI and UDI (unified display interface).But along with the Intel that supports UDI moves on to DisplayPort, and the fading out of DVI, the situation that HDMI and DisplayPort two powers disaccord forms.
The consumer electronics camp mainly adopts HDMI at present, and the PC camp is more prone to adopt DisplayPort.The equipment of using the HDMI standard mainly concentrates on the field of family expenses and the hand-held consumer electronics of part, as TV, disc player, digital camera, Digital Video or the like.The application of DisplayPort mainly concentrates in the application of PC and internal system, mainly comprises the interconnected and computer interconnected between video card and the display.The aim of DisplayPort is to reduce the cost of system platform, and forms general digital video/audio interface standard in computer, Digital Television and assembly.
On the technological layer, HDMI and DisplayPort be equal to each other, quality is respectively arranged.The bandwidth of HDMI 1.3 versions has also increased to 10.2Gbps, has also solved the 1.2 editions limitation that can't support 1080p of HDMI.The data transmission rate that DisplayPort supports has reached 10.8Gbps, has also added support to HDCP (dynamic host allocation protocol) copyright protection DisplayPort 1.1 editions.At present, HDMI has had the practical application near 500 kinds of products, takes advantage on popularization; And DisplayPort is mainly more outstanding at aspects such as transmission bandwidth, display resolutions.Along with the continuous enhancing of both sides' technology, the boundary between HDMI and the DisplayPort is also fuzzy gradually, and the gesture of both sides' fusion also manifests gradually.
In the multimedia video field, no matter be to adopt HDMI interface or DisplayPort interface, obtain the demand of the high-quality audio-visual experience of more excellences along with consumer wants, need increasing multichannel interface, as two-way, three road or multichannel HDMI interface, or two-way, three road or multichannel DisplayPort interface.Peg graft simultaneously and can support the equipment of HDMI or DisplayPort, multimedia equipment receives HDMI or DisplayPort signal by the multichannel interface, and the treatment system by inside is carried out corresponding address assignment, address choice and shown video-audio signal according to the address the input of signal.For multimedia equipment production firm, how in the multichannel interface expansion of multimedia equipment, strengthen the stability of a system that internal signal handles, the production cost that reduces equipment is the problem of main solution.
The multichannel that discloses a kind of HDMI interface in Chinese patent CN200620086739.X is switched expanded circuit and television set, realize in multichannel switching and the expansion field at the HDMI of television set interface, a kind of circuit is provided, as shown in Figure 1, by in the television set of originally only supporting single channel HDMI interface, having realized expansion, satisfied the reception of multi-path high-definition signal to multichannel HDMI interface by the extension circuit structure.But this technical scheme can only solve the expansion at HDMI multichannel interface, and realizes by circuit structure, because increasing of appliance component brought great risk for the stability of a system of whole television devices, has increased production cost.
Summary of the invention
An object of the present invention is to provide television set and television reception changing method that a kind of that a kind of stability of a system is good, cost is low receives switching device shifter, comprises described reception switching device shifter.
For addressing the above problem, the present invention by the following technical solutions:
First aspect the invention provides a kind of reception switching device shifter, comprising: receiving system receives the digital signal that sends from signal source; Storage arrangement is used for storing the extending display identification data that edit in advance; The switch switching device shifter, according to the digital signal that receiving system receives, invoke extensions display identification data from storage arrangement, and the digital signal that receives carried out address assignment, the extending display identification data and the digital signal of output receiving system correspondence.
Above-mentioned switch switching device shifter also comprises: address control device, be used for a plurality of receiving systems are carried out address setting, and access the extending display identification data of receiving system correspondence separately according to the address of a plurality of receiving systems, the extending display identification data and the digital signal of output receiving system.
Above-mentioned switch switching device shifter also comprises: calling device, and be used for controlling the extending display identification data are called the switch switching device shifter from storage arrangement, described calling device is I
2The C bus.
Second aspect the invention provides a kind of television set, comprising: receiving system receives the audio frequency and video digital signal that sends from signal source; Storage arrangement is used for storing the extending display identification data that edit in advance; The switch switching device shifter, the audio frequency and video digital signal that receives according to receiving system, invoke extensions display identification data from storage arrangement, and the audio frequency and video digital signal that receives carried out address assignment, the extending display identification data and the audio frequency and video digital signal of output receiving system correspondence; Display unit, extending display identification data and audio frequency and video digital signal according to the switch switching device shifter output that receives through signal decoding, show described vision signal and play described audio signal.
Above-mentioned switch switching device shifter also comprises: address control device, be used for a plurality of receiving systems are carried out address setting, and access the extending display identification data of receiving system correspondence separately according to the address of a plurality of receiving systems, the extending display identification data and the digital signal of output receiving system.
Above-mentioned switch switching device shifter also comprises: calling device, and be used for controlling the extending display identification data are called the switch switching device shifter from storage arrangement, described calling device is I
2The C bus.
The third aspect the invention provides a kind of television reception method for handover control, may further comprise the steps:
S1 is with in the extending display identification writing data into memory device;
The audio frequency and video digital signal that the S2 receiving end/sending end sends;
S3 is the invoke extensions display identification data from storage arrangement;
The extending display identification data that S4 calls according to step S3 are carried out address assignment to each road receiver port;
The S5 TV pick-up attacnment, shows described vision signal and plays described audio signal through signal decoding according to the extending display identification data and the audio frequency and video digital signal of step S4 output.
Above-mentioned steps S4 is further comprising the steps of:
S41 carries out address setting to a plurality of receiving systems;
S42 accesses the extending display identification data of receiving system correspondence separately according to the address of a plurality of receiving systems;
The extending display identification data and the digital signal of S43 output receiving system.
Above-mentioned steps S41 is further comprising the steps of:
S411 is provided with the address to receiving system, and in the inner correspondence of switch switching device shifter the Port address is set;
S412 utilizes I according to corresponding address
2C calls the switch switching device shifter with the extending display identification data from storage arrangement.
Above-mentioned steps S1 is further comprising the steps of:
S11 sets the structure of arrays of extending display identification data;
The S12 initialization system;
Step S2 is further comprising the steps of:
The S21 signal receiving end sends the SPD signal to transmitting terminal;
The S22 transmitting terminal is according to the SPD signal that receives, and acknowledgement channel is communicated with, and starts the DDC passage.
The present invention is by with EDID (extending display identification data) write memory device in advance, and utilizes the switch switching device shifter to the calling and address assignment of EDID, solved the problem of multiple signals receiving port transmission of digital signals, and possessed the advantage of system stability.The present invention is described in detail below in conjunction with accompanying drawing, and these and other purpose of the present invention, feature, aspect and advantage will become more obvious.
Description of drawings
Fig. 1 is the schematic diagram of existing HDMI switching control;
Fig. 2 is the outside schematic diagram of video-unit embodiment;
Fig. 3 is the internal frame diagram of video-unit embodiment 1;
Fig. 4 is the FB(flow block) of the address control embodiment of switch switching device shifter;
Fig. 5 is the flow chart of the call by location embodiment of switch switching device shifter;
The internal frame diagram of video-unit embodiment 2 of the present invention during Fig. 6;
Fig. 7 is the FB(flow block) of control method embodiment of the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with embodiment and embodiment accompanying drawing.
Referring to figs. 2 to Fig. 3, with the TV control system of explanation as an embodiment of video-unit according to the present invention. Comprise signal source 1a, 1b, 1c, television set 2, on television set, be provided with receiving system and be used for receiving the signal that sends from signal source 1, the receiving system form of expression is a lot, be specially signaling interface, wireless signal receiver, radio frequency signal receiver etc., be specially a plurality of signaling interfaces 3 at this, in the present embodiment, have 3 signaling interfaces 3 to be electrically connected with 3 signal sources 1 respectively.The signal that sends in this signal source can also be other signals such as vision signal, audio signal, in order to further specify the present invention program, sets 3 signal sources 1 at this and all sends the HDMI signal.Each signaling interface 3 receives the HDMI signal.3 signal sources 1 have been represented three different audio ﹠ video equipments in fact, and at this, 3 signal sources 1 can be respectively to support the equipment of HDMI.As DVD, laptop computer, video camera or the like.The signaling interface of DVD and television set is connected, and DVD sends the signal of supporting HDMI to television set, and is presented on the display screen of television set.
What link to each other with signaling interface is a control device, according to the HDMI signal that signaling interface receives, realizes the control to the multichannel interface.In control device, also has a storage arrangement 4, in advance with EDID (the Extended Display Identification Data-extending display identification data that edit, it is a kind of VESA standard data format, the parameter that wherein comprises relevant monitor and performance thereof, comprise that identifying information, maximum image size, color setting, manufacturer pre-set, the character string of the restriction of frequency range and display name and sequence number or the like) be stored in the storage arrangement 4.EDID writing data into memory device 4 can be adopted the pattern that writes integrated chip with software program.Preferably be provided with specific as follows:
It is as follows to set the EDID structure:
EDID?Block?0，Bytes?0-127[00H-7FH]
Block?Type：EDID?1.3
Specifically in memory, EDID specifically to write set-up mode a lot, be preferably as follows:
//EDID array
static?UINT8?EDIDDATA[256]＝
{
0x00，0xFF，0xFF，0xFF，0xFF，0xFF，0xFF，0x00，0x41，0x98，0x02，0x50，0x01，0x00，0x00，0x00，
0x10，0x11，0x01，0x03，0x80，0x6E，0x38，0x78，0x0B，0x0D，0xC9，0xA0，0x57，0x47，0x98，0x27，
0x12，0x48，0x4C，0xBF，0xCF，0x00，0x01，0x01，0x01，0x41，0x01，0x41，0x01，0x41，0x01，0x41，
0x01，0x41，0x01，0x41，0x01，0x41，0x8A，0x21，0x56，0x72，0x51，0x00，0x1A，0x30，0x6E，0x28，
0x55，0x00，0x7E，0x88，0x42，0x00，0x00，0x1E，0x01，0x00，0x00，0xF9，0x00，0x00，0x00，0x00，
0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0xFC，0x00，0x50，
0x48，0x44，0x35，0x30，0x33，0x39，0x4E，0x55，0x53，0x00，0x00，0x00，0x00，0x00，0x00，0xFF，
0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x01，0x3D，
0x02，0x03，0x1D，0x76，0x4A，0x84，0x14，0x16，0x12，0x05，0x13，0x07，0x03，0x1F，0x10，0x23，
0x09，0x07，0x07，0x83，0x01，0x00，0x00，0x65，0x03，0x0C，0x00，0x10，0x00，0x8C，0x0A，0xD0，
0x8A，0x20，0xE0，0x2D，0x10，0x10，0x3E，0x96，0x00，0x7E，0x88，0x42，0x00，0x00，0x18，0x8C，
0x0A，0xD0，0x90，0x20，0x40，0x31，0x20，0x0C，0x40，0x55，0x00，0x7E，0x88，0x42，0x00，0x00，
0x98，0x4B，0x0C，0x80，0x90，0x20，0xE0，0x1D，0x10，0x08，0x60，0x22，0x00，0x72，0x16，0x11，
0x00，0x00，0x18，0x8C，0x0A，0xA0，0x14，0x51，0xF0，0x16，0x00，0x26，0x7C，0x43，0x00，0x13，
0x8E，0x21，0x00，0x00，0x98，0x01，0x1D，0x80，0x18，0x71，0x1C，0x16，0x20，0x58，0x2C，0x25，
0x00，0x7E，0x88，0x42，0x00，0x00，0x1E，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0xFB，
}；
After having defined the EDID data, carry out the initialization setting then, guarantee upgrading in time and stability of system.
After above program is finished, be stored in the storage arrangement 4 standby.
When signaling interface 3 received the HDMI signal, switch switching device shifter 5 called EDID from storage arrangement 4, and the HDMI signal that receives is carried out address assignment.Described address number is to set according to the quantity of signaling interface 3.At this point the location number is 3 the tunnel.
Switch switching device shifter 5 leaves and comprises address control device, the address control principle of described address control device as shown in Figure 4, it is 1.0.0.0 that 3 signaling interface 3a, 3b, 3c are provided with the address respectively; 2.0.0.0; 3.0.0.0; Correspondence is provided with address Porta:1.0.0.0 respectively in switch switching device shifter 5 inside; Portb:2.0.0.0; Portc:3.0.0.0 corresponding 3a, 3b, 3c.Connecting by two control pins between storage arrangement 4 and switch switching device shifter 5, is respectively SCL_CTL and SDA_CTL.These two control pins pass through I
2The C control bus is called in EDID in the switch switching device shifter 5.SCL_CTL and SDA_CTL pass through I
2C is provided with address control registration switch and EDID storage switch, when the control address of SCL_CTL and SDA_CTL is set to 9E/9F, this moment I
2The control pin of C is LOW, and the switch of EDID memory just is set to LOW.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BE/BF, this moment I
2The control pin of C is HIGH, and the switch of EDID memory just is set to HIGH.When the control address of SCL_CTL and SDA_CTL is set to 9C/9D, this moment I
2The control pin of C is LOW, and the switch of registration controller just is set to LOW.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BC/BD, this moment I
2The control pin of C is HIGH, and the switch of registration controller just is set to HIGH.I
2C is from 0X00 to 0XFF at the write sequence of switch switching device shifter 5, thereby passes through I
2The control address of C reaches control SCL_CTL and SDA_CTL, and then reaches control EDID and call in the switch controlling device 5 from storage arrangement 4.
In calling in the process of EDID, switch switching device shifter 5 can reach the initialization of EDID and calls in by caller is set.
(set HDMI in the present invention is 3 the tunnel to switch switching device shifter 5 for Hot Plug Detect, the corresponding every road HDMI of HPDx difference with HPDx, x=1 then, 2,3) be set at LOW, finish call in EDID after, switch switching device shifter 5 will allow the HPD setting device (to be specially HPD_SET[7:0] ﹠amp automatically; POWx) control HPDx.Under this pattern, CEC (user's electronic control) physical address of 3 road HDMI signaling interfaces in switch switching device shifter 5 is with following setting: Porta: directly call in (acquiescence 1.0.0.0) from EDID; Portb: be set to 2.0.0.0; Portc: be set to 3.0.0.0.The CEC physical address area of Portb and Portc is similar with Porta, and system will calculate the package value of EDID BLOCK1 automatically.The address of EDID BLOCK is 0x80～0xFF.More than for EDID is called in the invocation pattern in the switch controlling device 5 from storage arrangement 4.
SCL_CTL and SDA_CTL can also discern from outside EDID device, call the EDID data and be stored in the storage arrangement 4, afterwards again in the EDID memory of write switch control device 5.The following is embodiment:
As shown in Figure 5.After system start-up, register setting 4 imports to register setting from outside EDID device with EDID from 0x00 to 0xFF after, software HPDx automatically is set to LOW.Then carry out self check, check the downloading task of whether finishing EDID.Do not finish downloading task, then register setting 4 imports to register setting with EDID from outside EDID device again from 0x00 to 0xFF, and HPDx is set to LOW automatically.Finish downloading task, then system allows HPD_SINK device or HPD_SET device control HPDx.The method of control HPDx is as follows: after system start-up, register EDIDBUFFCTL[7:0 is set]=0x01, be used for being provided with the CEC physical address area of S/W.But concrete setting program is: and WriteReg (Page0.0x10,0x01).
Then EDID is imported in the switch switching device shifter 5 to Porta.Can write to the 0xFF order by 0x00.
Download the CEC physical address area again to Page0.0x17.Can write registration SWPHYADDR address for [7:0], physical address area is set in EDID memory block 1, the setting of Portb and Portc is similar to Porta.
Physical address and the package value of Portb are downloaded to Page 0.0x11～0x13.The address that can write the AB_ADDR of registration table Portb is [7:0], and the address of Portb CD_ADDR is [7:0], and the package value of Portb is [7:0].
Physical address and the package value of Portc are downloaded to Page0.0x14～0x16.The address that can write the AB_ADDR of registration table Portc is [7:0], and the address of Portc CD_ADDR is [7:0], and the package value of Portc is [7:0].
Set registration function EDIDBUFFCTL[7:0 once more]=0x07, make the EDID can Be Controlled pin SCL1/SDA1, SCL2/SDA2, SCL3/SDA3 identification.Make the CEC physical address area of S/W useful, and set the CEC physical address area of S/W Portb, Portc.Can specifically be set to WriteReg (Page0.0x10,0x07).
I as Porta, Portb, Portc
2The C bus can be discerned EDID, and switch switching device shifter 5 is given the EDID storage address with automatic mark A0/A1 address.The CEC physical address of Porta will obtain from the EDID memory.The physical address of Portb, Portc and package value obtain each in Page0.0x11～0x13 and Page0.0x14～0x16.
For example: when system is set to 2.0.0.0 and 3.0.0.0 respectively with the CEC physical address of Portb, Portc, the CEC physical address area of Porta is exactly 0x98 like this.It is as follows that step specifically is set:
S41, system start-up.
S42, register EDIDBUFFCTL[7:0 is set]=0x01.
S43, be that Porta calls in EDID in the EDID memory of switch switching device shifter 5 by control pin SCL/SDA.
S44, WPHYADDR[7:0 is set]=0x98.
S45, AB_ADDR2[7:0 is set]=0x20, CD_ADDR2[7:0]=0x00, CKSUM2[7:0]=0xFFh﹠amp; (0x100h-(M﹠amp; 0xFFh)).
S46, AB_ADDR3[7:0 is set]=0x30, CD_ADDR3[7:0]=0x00, CKSUM3[7:0]=0xFFh﹠amp; (0x100h-(M﹠amp; 0xFFh)).
S47, EDIDBUFFCTL[7:0 is set]=0x07.
HPD (Hot Plug Detect) signal is controlled by register HPD_SET device [7:0] or HPD_SINK device; The HPD statement of Port3 is provided with by HPD_SET device [7:6], the HPD statement of Port2 is provided with by HPD_SET device [5:4], the HPD statement of Port 1 is provided with by HPD_SET device [3:2], and in the present embodiment, HPDx is corresponding three road HDMI (x=1 2 3) respectively.
The HPD_SINK device is controlled by storage arrangement 4, HPD_SINK=HIGH, then TV Ready
HPD_SINK=LOW, then TV Not Ready
System allows after HPD_SINK device or the HPD_SET device control HPDx, and the EDID memory is that Porta distributes address 1.0.0.0, respective signal interface 3a.The address that system upgrades Portb automatically is 2.0.0.0, respective signal interface 3b.The address that system upgrades Portc automatically is 3.0.0.0, respective signal interface 3c.
After switch switching device shifter 5 is finished 3 road HDMI address assignment, directly enter decoding chip and decode, the TV display end shows the HDMI signal that receives afterwards.
The present invention provides a kind of controlling schemes in addition.As shown in Figure 6,3 road signaling interfaces are set receive the HDMI signal, pass through I
2C is connected with converting switch device 5, connects a storage arrangement 4 between converting switch device 5 and decoding chip.The EDID that just edits in advance is stored in the storage arrangement 4.When receiving the HDMI signal, be stored in EDID signal corresponding in the storage arrangement according to its call by location, gated memory device 4 and decoding chip, after decoding, the display end that outputs to TV shows.Address assignment between converting switch device 4 and the converting switch device 5 and call by location and embodiment 1 are similar.All be to be 1.0.0.0 with the address being set respectively with 3 signaling interface 3a, 3b, 3c; 2.0.0.0; 3.0.0.0; Connecting by two control pins between storage arrangement 4 and switch switching device shifter, is respectively SCL_CTL and SDA_CTL.The gating of these two control pin control store apparatuses 4 and decoding chip.When the control address of SCL_CTL and SDA_CTL is set to 9E/9F, this moment I
2The control pin of C is LOW, and the switch of EDID memory just is set to LOW, storage arrangement 4 and converting switch device 5 gatings.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BE/BF, this moment I
2The control pin of C is HIGH, and the switch of EDID memory just is set to HIGH.Storage arrangement 4 and converting switch device 5 are obstructed.When the control address of SCL_CTL and SDA_CTL is set to 9C/9D, this moment I
2The control pin of C is LOW, storage arrangement 4 and decoding CE.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BC/BD, this moment I
2The control pin of C is HIGH, and storage arrangement 4 and decoding chip are obstructed.I
2C at the write sequence of switch switching device shifter 5 is from 0X00 to 0XFF.In calling the process of EDID, switch switching device shifter 5 is with HPDx (Hot PlugDetect, HPDx is corresponding every road HDMI respectively, setting HDMI in the present invention is 3 the tunnel, x=1 then, 2,3) be set at LOW, behind complete call EDID address, switch switching device shifter 5 will allow HPD_SET[7:0] ﹠amp automatically; POWx controls HPDx.
Thus, based on above control principle, also proposed a kind of control method this inventor, as shown in Figure 7, concrete steps are as follows:
Step 1 is in EDID write memory device.
The preferred implementation of setting the EDID structure is as follows:
EDID?Block?0，Bytes?0-127[00H-7FH]
Block?Type：EDID?1.3
Utilize Software tool, preferably be provided with EDID as follows:
//EDID array
static?UINT8EDIDDATA[256]＝
{
0x00，0xFF，0xFF，0xFF，0xFF，0xFF，0xFF，0x00，0x41，0x98，0x02，0x50，0x01，0x00，0x00，0x00，
0x10，0x11，0x01，0x03，0x80，0x6E，0x38，0x78，0x0B，0x0D，0xC9，0xA0，0x57，0x47，0x98，0x27，
0x12，0x48，0x4C，0xBF，0xCF，0x00，0x01，0x01，0x01，0x41，0x01，0x41，0x01，0x41，0x01，0x41，
0x01，0x41，0x01，0x41，0x01，0x41，0x8A，0x21，0x56，0x72，0x51，0x00，0x1A，0x30，0x6E，0x28，
0x55，0x00，0x7E，0x88，0x42，0x00，0x00，0x1E，0x01，0x00，0x00，0xF9，0x00，0x00，0x00，0x00，
0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0xFC，0x00，0x50，
0x48，0x44，0x35，0x30，0x33，0x39，0x4E，0x55，0x53，0x00，0x00，0x00，0x00，0x00，0x00，0xFF，
0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x01，0x3D，
0x02，0x03，0x1D，0x76，0x4A，0x84，0x14，0x16，0x12，0x05，0x13，0x07，0x03，0x1F，0x10，0x23，
0x09，0x07，0x07，0x83，0x01，0x00，0x00，0x65，0x03，0x0C，0x00，0x10，0x00，0x8C，0x0A，0xD0，
0x8A，0x20，0xE0，0x2D，0x10，0x10，0x3E，0x96，0x00，0x7E，0x88，0x42，0x00，0x00，0x18，0x8C，
0x0A，0xD0，0x90，0x20，0x40，0x31，0x20，0x0C，0x40，0x55，0x00，0x7E，0x88，0x42，0x00，0x00，
0x98，0x4B，0x0C，0x80，0x90，0x20，0xE0，0x1D，0x10，0x08，0x60，0x22，0x00，0x72，0x16，0x11，
0x00，0x00，0x18，0x8C，0x0A，0xA0，0x14，0x51，0xF0，0x16，0x00，0x26，0x7C，0x43，0x00，0x13，
0x8E，0x21，0x00，0x00，0x98，0x01，0x1D，0x80，0x18，0x71，0x1C，0x16，0x20，0x58，0x2C，0x25，
0x00，0x7E，0x88，0x42，0x00，0x00，0x1E，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0x00，0xFB，
}；
After having defined the EDID data, carry out the initialization setting then, guarantee upgrading in time and stability of system.
3 road signaling interfaces of television set receive the HDMI signal from 3 different HDMI equipment respectively.Behind signaling interface and the HDMI equipment electric connection, send the SPD signal to HDM1 equipment, HDNI equipment is according to the SPD signal that receives, and acknowledgement channel is communicated with, and starts the DDC passage.
Step 3 is called EDID from storage arrangement.
Switch switching device shifter 5 calls the EDID data that write in advance from storage arrangement 4.Switch switching device shifter 5 is connected by the pair of control pin with storage arrangement 4.Be respectively SCL_CTL and SDA_CTL.These two control pins pass through I
2The C control bus is called in EDID in the switch switching device shifter 5.SCL_CTL and SDA_CTL pass through I
2C is provided with address control registration switch and EDID storage switch, when the control address of SCL_CTL and SDA_CTL is set to 9E/9F, this moment I
2The control pin of C is LOW, and the switch of EDID memory just is set to LOW.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BE/BF, this moment I
2The control pin of C is HIGH, and the switch of EDID memory just is set to HIGH.When the control address of SCL_CTL and SDA_CTL is set to 9C/9D, this moment I
2The control pin of C is LOW, and the switch of registration controller just is set to LOW.When SCL_CTL and SDA_CTL pass through I
2When the control address of C is set to BC/BD, this moment I
2The control pin of C is HIGH, and the switch of registration controller just is set to HIGH.EDID can call in the switch controlling device 5 from storage arrangement 4 by SCL_CTL and SDA_CTL.I
2C at the write sequence of switch switching device shifter 5 is from 0X00 to 0XFF.In calling in the process of EDID, switch switching device shifter 5 is with HPDx (Hot Plug Detect, the corresponding every road HDMI of HPDx difference, setting HDMI in the present invention is 3 the tunnel, x=1 then, 2,3) be set at LOW, finish call in EDID after, switch switching device shifter 5 will allow HPD_SET[7:0] ﹠amp automatically; POWx controls HPDx.Under this pattern, CEC (user's electronic control) physical address of 3 road HDMI signaling interfaces in switch switching device shifter 5 is with following setting: Porta: directly call in (acquiescence 1.0.0.0) from EDID; Portb: be set to 2.0.0.0; Portc: be set to 3.0.0.0.The CEC physical address area of Portb and Portc is similar with Porta, and system will calculate the package value of EDID BLOCK1 automatically.The address of EDID BLOCK is 0x80～0xFF.
Switch switching device shifter 5 complete call tasks, then system allows HPD_SINK device or HPD_SET device control HPDx.The method of control HPDx is as follows: after system start-up, register EDIDBUFFCTL[7:0 is set]=0x01, be used for being provided with the CEC physical address area of S/W.But concrete setting program is: and WriteReg (Page 0.0x10,0x01).
Then EDID is imported in the switch switching device shifter 5 to Porta.Can write to the 0xFF order by 0x00.
Download the CEC physical address area again to Page0.0x17.Can write registration SWPHYADDR address for [7:0], physical address area is set in EDID memory block 1, the setting of Portb and Portc is similar to Porta.
Physical address and the package value of Portb are downloaded to Page0.0x11～0x13.The address that can write the AB_ADDR of registration table Portb is [7:0], and the address of Portb CD_ADDR is [7:0], and the package value of Portb is [7:0].
Physical address and the package value of Portc are downloaded to Page0.0x14～0x16.The address that can write the AB_ADDR of registration table Portc is [7:0], and the address of Portc CD_ADDR is [7:0], and the package value of Portc is [7:0].
Set registration function EDIDBUFFCTL[7:0 once more]=0x07, make the EDID can Be Controlled pin SCL1/SDA1, SCL2/SDA2, SCL3/SDA3 identification.Make the CEC physical address area of S/W useful, and set the CEC physical address area of S/W Portb, Portc.Can specifically be set to WriteReg (Page0.0x10,0x07).
I as Porta, Portb, Portc
2The C bus can be discerned EDID, and switch switching device shifter 5 is given the EDID storage address with automatic mark A0/A1 address.The CEC physical address of Porta will obtain from the EDID memory.The physical address of Portb, Portc and package value obtain each in Page0.0x11～0x13 and Page0.0x14～0x16.
For example: when system is set to 2.0.0.0 and 3.0.0.0 respectively with the CEC physical address of Portb, Portc, the CEC physical address area of Porta is exactly 0x98 like this.It is as follows that step specifically is set:
S41, system start-up.
S42, register EDIDBUFFCTL[7:0 is set]=0x01.
S43, be that Porta calls in EDID in the EDID memory of switch switching device shifter 5 by control pin SCL/SDA.
S44, WPHYADDR[7:0 is set]=0x98.
S45, AB_ADDR2[7:0 is set]=0x20, CD_ADDR2[7:0]=0x00, CKSUM2[7:0]=0xFFh﹠amp; (0x100h-(M﹠amp; 0xFFh)).
S46, AB_ADDR3[7:0 is set]=0x30, CD_ADDR3[7:0]=0x00, CKSUM3[7:0]=0xFFh﹠amp; (0x100h-(M﹠amp; 0xFFh)).
S47, EDIDBUFFCTL[7:0 is set]=0x07.
HPD (Hot Plug Detect) signal is controlled by register HPD_SET device [7:0] or HPD_SINK device; The HPD statement of Port3 is provided with by HPD_SET device [7:6], the HPD statement of Port2 is provided with by HPD_SET device [5:4], the HPD statement of Port 1 is provided with by HPD_SET device [3:2], and in the present embodiment, HPDx is corresponding three road HDMI (x=123) respectively.
The HPD_SINK device is controlled by storage arrangement 4, HPD_SINK=HIGH, then TV Ready
HPD_SINK=LOW, then TV Not Ready
System allows after HPD_SINK device or the HPD_SET device control HPDx, and the EDID memory is that Porta distributes address 1.0.0.0, respective signal interface 3a.The address that system upgrades Portb automatically is 2.0.0.0, respective signal interface 3b.The address that system upgrades Portc automatically is 3.0.0.0, respective signal interface 3c.
The above only is the specific embodiment of the present invention, and the present invention can also be applied in the video control apparatus of other many interfaces, as computer system etc.Protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claim was defined.
Claims (7)
1. television set comprises:
Receiving system receives the audio frequency and video digital signal that sends from signal source;
Storage arrangement is used for storing the extending display identification data that edit in advance;
The switch switching device shifter, the audio frequency and video digital signal that receives according to receiving system, invoke extensions display identification data from storage arrangement, and the audio frequency and video digital signal that receives carried out address assignment, the extending display identification data and the audio frequency and video digital signal of output receiving system correspondence;
TV pick-up attacnment, extending display identification data and audio frequency and video digital signal according to the switch switching device shifter output that receives through signal decoding, show described vision signal and play described audio signal.
2. television set according to claim 1, it is characterized in that: described switch switching device shifter also comprises: address control device, be used for a plurality of receiving systems are carried out address setting, and access the extending display identification data of receiving system correspondence separately according to the address of a plurality of receiving systems, the extending display identification data and the digital signal of output receiving system.
3. television set according to claim 1 and 2 is characterized in that: described switch switching device shifter also comprises: calling device, and be used for controlling the extending display identification data are called the switch switching device shifter from storage arrangement, described calling device is I
2The C bus.
4. television reception method for handover control may further comprise the steps:
S1 is with in the extending display identification writing data into memory device;
The audio frequency and video digital signal that the S2 receiving end/sending end sends;
S3 is the invoke extensions display identification data from storage arrangement;
The extending display identification data that S4 calls according to step S3 are carried out address assignment to each road receiver port;
The S5 TV pick-up attacnment, shows described vision signal and plays described audio signal through signal decoding according to the extending display identification data and the audio frequency and video digital signal of step S4 output.
5. television reception method for handover control according to claim 4, it is characterized in that: step S4 is further comprising the steps of:
S41 carries out address setting to a plurality of receiving systems;
S42 accesses the extending display identification data of receiving system correspondence separately according to the address of a plurality of receiving systems;
The extending display identification data and the digital signal of S43 output receiving system.
6. television reception method for handover control according to claim 5, it is characterized in that: step S41 is further comprising the steps of:
S411 is provided with the address to receiving system, and in the inner correspondence of switch switching device shifter the Port address is set;
S412 utilizes I according to corresponding address
2C calls the switch switching device shifter with the extending display identification data from storage arrangement.
7. television reception method for handover control according to claim 6 is characterized in that: described step S1 is further comprising the steps of:
S11 sets the structure of arrays of extending display identification data;
The S12 initialization system;
Step S2 is further comprising the steps of:
The S21 signal receiving end sends the SPD signal to transmitting terminal;
The S22 transmitting terminal is according to the SPD signal that receives, and acknowledgement channel is communicated with, and starts the DDC passage.
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| US9413986B1 (en) | 2015-01-27 | 2016-08-09 | Aten International Co., Ltd. | Video switch and switching method thereof |
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| KR20100104025A (en) * | 2009-03-16 | 2010-09-29 | 삼성전자주식회사 | Apparatus to process signal of digital multimedia interface and method thereof |
| CN101819761B (en) * | 2010-04-16 | 2012-06-06 | 华为终端有限公司 | Equipment information display method, system and related equipment |
| CN101916592A (en) * | 2010-09-08 | 2010-12-15 | 福建捷联电子有限公司 | Burning-free method for liquid crystal display television HDMI EDID |
| CN103391470A (en) * | 2013-07-10 | 2013-11-13 | Tcl通力电子（惠州）有限公司 | Method and device for switching information sources automatically |
| TWI518673B (en) * | 2014-04-02 | 2016-01-21 | 宏正自動科技股份有限公司 | Video switch and switching method thereof |
| US10051205B1 (en) * | 2017-08-31 | 2018-08-14 | Icron Technologies Corporation | Devices, systems, and methods for instant video switching in an extension environment |
| CN111399922B (en) * | 2020-03-17 | 2024-02-23 | 北京星网锐捷网络技术有限公司 | Dual-system display device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9413986B1 (en) | 2015-01-27 | 2016-08-09 | Aten International Co., Ltd. | Video switch and switching method thereof |
| TWI554113B (en) * | 2015-01-27 | 2016-10-11 | 宏正自動科技股份有限公司 | Video switch and switching method thereof |
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