CN102055943B

CN102055943B - Detection method, detection device and multimedia device

Info

Publication number: CN102055943B
Application number: CN 200910181088
Authority: CN
Inventors: 黄文泽
Original assignee: Wistron Corp
Current assignee: Wistron Corp
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2013-10-23
Anticipated expiration: 2029-10-28
Also published as: CN102055943A

Abstract

The invention discloses a detection method, a detection device and a multimedia device. The detection method is used for detecting the connecting states of a plurality of connection ports in the multimedia device which meets high-resolution multimedia interface specifications. The detection method comprises the steps of: acquiring a plurality of pieces of electrical information of the plurality of connection ports; and determining the connection situation of the plurality of connection ports according to the plurality of pieces of electrical information.

Description

Detection method and checkout gear and multimedia device

Technical field

The present invention relates to a kind of detection method and checkout gear and multimedia device, particularly relate to a kind of CEC channel path in addition of passing through, carry out detection method and checkout gear and multimedia device that external CEC device unusual fluctuation detects.

Background technology

High resolution multimedia interface (High-Definition Multimedia Interface, HDMI) be a kind of image/sound coffret of total digitalization, can transmit simultaneously the audio ﹠ video signal without compression (uncompressed), and all are compatible with the device of HDMI, box (set-top box) on the machine for example, CD player, personal computer, holder for TV playing, digital sound and TV etc., all can be by HDMI institute standard minimize transmission differential signal (Transition-Minimized Differential Signaling) channel, display data channel (Display Data Channel) and consumer electronics device control (Consumer Electronics Control, CEC) passage are exchanged each other's needs.Therefore, HDMI is little by little replacing the audio-visual transmission interface of existing simulation (for example SCART and RCA terminal) on the market.

Please refer to Fig. 1, Fig. 1 is the schematic diagram of an existing HDMI system 10.In HDMI system 10, all are compatible with the device of HDMI, can be categorized as source (Source) device, relaying (Repeater) device and terminal (Sink) device according to its running.Original device such as box on CD player, holder for TV playing, main frame, the machine etc., only possesses HDMI signal output function, is used for exporting the HDMI signal.Relay, HDMI signal switching device for example, possessing simultaneously the HDMI signal receives and output function, be used for the HDMI signal that original device is exported is sent to terminal installation, its mode that turns biography can be one to one, one-to-many, many-one, multi-to-multi, and can have simultaneously signal and strengthen (or amplification) function.Terminal installation, such as TV, screen etc. only has the HDMI receiving function, is used for playing or processing HDMI signal.In addition, if a certain terminal installation except possessing HDMI signal receiving function, also possesses HDMI signal output function, its role then decides according to there being its output of no-trump to be connected to the HDMI input of another terminal installation.Be connected if having with other terminal installation, then this device will be played the part of the role of relay until remove its connection status.

Generally speaking, each HDMI device all has independently control interface, such as remote controller.In this case, the consumer has more HDMI multimedia device, and then the quantity of remote controller also and then increases, and causes and uses upper greatly inconvenience.In this case, can pass through the CEC standard, realize the purpose of multiple control, that is utilize and be linked on the CEC network the arbitrarily built-in control button of other device, make that arbitrary device can be easier to control in the CEC network.

At first, Fig. 2 is the schematic diagram of the definition of a HDMI joint and each pin thereof.As shown in Figure 2, the pin 13 of HDMI joint is for being used to provide the pin of consumer electronics device control signal.By pin 13, the user can control arbitrary support HDMI-CEC device.For instance, the user can be by the TV of an outfit HDMI-CEC function, via the pin 13 of HDMI joint, control a DVD player external and that meet the HDMI-CEC standard and play, turn soon and rewinding, or control meets, and box carries out channel switching etc. on the machine of HDMI-CEC standard.

Define five large classes totally ten two devices in the CEC standard specification, and given specific logical address (Logical Address, LA).As shown in Figure 3, the LA of TV is that the LA of " 0 ", tape deck is " 1 ", " 2 " or " 9 " (such as DVD videocorder), the LA of tuner (Tuner) is " 3 ", " 6 ", " 7 " or " 10 ", the LA of playing device (such as DVD player) is " 4 ", " 8 ", " 11 ", and the LA of sound system is " 5 " ....In addition, LA is that " 12 ", " 13 " keep device use that is not defined to other.When being " 14 " for the physical address of TV (Physical Address, PA) for " 0000 ", uses LA.LA is that " 15 " are used for unregistered or broadcasting.Wherein, logical address is relevant to the classification of HDMI-CEC device, physical address then is to be relevant to the HDMI-CEC topology network, that is one the HDMI device be positioned at the address of HDMI-CEC network, for example in Fig. 1, if terminal installation is TV, then its logical address is set as " 0 ", and physical address then is set as " 0000 ".

Whether in addition, the CEC standard specification has also illustrated that the HDMI-CEC device can be by sending poll (Poll) command packet to a certain specific logical address, occupied and learn that the network that has or not device to be attached to CEC comes from this logical address.Smooth for the operation of guaranteeing whole family expenses audio-video system, even the HDMI device is not connected to the CEC network, CEC device (such as TV) gives this one to be similar to the synchronously grouping of (Synchronization) with regard to beard and hair at set intervals.In this case, the time interval of transmission polling order grouping will affect the entire system performance greatly.If it is too short to send the time interval of polling order grouping, then can increase on foot the burden of system, the oversize Operational Figure Of Merit (Sensitivity) that then can have influence on User's Interface of the time interval.

In this case, how to promote the detection efficiency of CEC device, simultaneously do not affect system burden, also just become one of target that industry makes great efforts.

Summary of the invention

Therefore, main purpose of the present invention namely is to provide a kind of detection method and checkout gear and multimedia device.

The present invention discloses a kind of detection method, is used for the connecting state that a multimedia device that meets the high resolution multimedia interface specification detects a plurality of connectivity ports, and this detection method includes a plurality of electric informations of obtaining these a plurality of connectivity ports; And according to these a plurality of electric informations, judge the connection situation of these a plurality of connectivity ports.

The present invention also discloses a kind of checkout gear, be used for the connecting state that a multimedia device that meets the high resolution multimedia interface specification detects a plurality of connectivity ports, this checkout gear includes an acquisition module, is used for obtaining a plurality of electric informations of these a plurality of connectivity ports; And a logic module, be used for judging the connection situation of these a plurality of connectivity ports according to these a plurality of electric informations.

The present invention also discloses a kind of multimedia device, is used for a multimedia system that meets the high resolution multimedia interface specification, and this multimedia device includes a plurality of connectivity ports; One switch controller is coupled to this a plurality of connectivity ports, is used for switching the signal of a connectivity port of exporting these a plurality of connectivity ports; One operating module is used for processing the signal that this switch controller is exported; An and checkout gear.This checkout gear includes an acquisition module, is used for obtaining a plurality of electric informations of these a plurality of connectivity ports; And a logic module, be used for judging the connection situation of these a plurality of connectivity ports according to these a plurality of electric informations.

Description of drawings

Fig. 1 is the schematic diagram of an existing HDMI system.

Fig. 2 is the schematic diagram of the definition of an existing HDMI joint and each pin thereof.

Fig. 3 is the device classification schematic diagram of existing CEC standard specification.

Fig. 4 is the schematic diagram of the embodiment of the invention one multimedia device.

Fig. 5 is the schematic diagram of an alternate embodiment of the multimedia device of Fig. 4.

Fig. 6 is the schematic diagram of an alternate embodiment of the multimedia device of Fig. 4.

Fig. 7 is the schematic diagram of the embodiment of the invention one conversion table.

Fig. 8 is the schematic diagram of the embodiment of the invention one HDMI relay.

Fig. 9 A to Fig. 9 E is the schematic diagram of the different operating situation of the embodiment of the invention one HDMI television set.

Figure 10 A to Figure 10 D is the detection operation workflow figure of the multimedia device of Fig. 4.

Figure 11 is an operation workflow figure of the multimedia device of Fig. 4.

The reference numeral explanation

10 HDMI systems

40,80 multimedia devices

HDMI_P1～HDMI_Pn connectivity port

400,800 switch controllers

402,802 operating modules

404,804 checkout gears

406,806 acquisition modules

408 logic modules

CH_TMDS TMDS passage

CH_CEC CEC passage

500 detecting units

Ra1～Ran, Rb1～Rbn, RL resistance

502,602 processors

600 Digital Detecting unit

604 simulate to the digital translation unit

808 delivery modules

90 HDMI television sets

P1～P6 input port

The P0 output port

100,1100 flow processs

120,140,160 sub-processes

102,104,122,124,142,144,146,162,164,166,168,1102,1104,1106,1108,1110 steps

Embodiment

In order not increase under the system burden, promote the detection efficiency of HDMI-CEC device, the present invention utilizes an extra detection mode, judge the connection situation of each connectivity port, can reflect in real time by this variation of external device, also need not increase simultaneously the transmission frequency of polling order grouping, even can exempt to divide into groups with polling order.

Please refer to Fig. 4, Fig. 4 is the schematic diagram of the embodiment of the invention one multimedia device 40.Multimedia device 40 is preferably for meeting HDMI-CEC

The TV of standard or display, but not as limit, it includes connectivity port HDMI_P1～HDMI_Pn, a switch controller 400, an operating module 402 and a checkout gear 404.Connectivity port HDMI_P1～HDMI_Pn can chimeric other HDMI device, and 400 controls according to the user of switch controller select the signal of an output connectivity port wherein to give operating module 402, to export corresponding Multimedia.Wherein, operating module 402 may comprise the soft and hardwares such as processor, electric power controller, peripheral state detection circuit, storage device, output device, and in order to realize the function of multimedia device 40, its detailed architecture is looked different system, and different the variation arranged, be not repeated herein.In addition, switch controller 400 is processed the signal of TMDS channel (CH_TMDS), and operating module 402 can be by CEC channel (CH_CEC) and each external HDMI-CEC device, and exchange is controlled signal or sent the polling order grouping.In addition, checkout gear 404 comprises an acquisition module 406 and a logic module 408, be used for by the path beyond the CEC channel CH_CEC, detect the connection situation of connectivity port HDMI_P1～HDMI_Pn, and the result that will detect is sent to operating module 402, with the state of the external HDMI device of real-time update.

Specifically, acquisition module 406 is used for obtaining the electric information of connectivity port HDMI_P1～HDMI_Pn, such as the voltage of each connectivity port, electric current, voltage difference, difference between current etc., logic module 408 is the electric information obtained according to acquisition module 406 then, judges the connection situation of connectivity port HDMI_P1～HDMI_Pn.In other words, multimedia device 40 does not need initiatively to send the polling order grouping, can learn the connection status of external HDMI device.In this case, can effectively reduce the transmission frequency of polling order grouping, to save system burden.The more important thing is, multimedia device 40 can be when having external HDMI device plug, make a response immediately, for example the picture at TV shows a message frame, the external device that represents a certain connectivity port is removed or is detected, or upgrades the content of OSD (On-screen Display).

Further, multimedia device 40 can utilize the testing result of checkout gear 404, reduces or stop the transmission of polling order grouping, certainly also can possess the defined operating mode of CEC standard, to promote compatibility.In this case, for the detection of external HDMI-CEC device, multimedia device 40 can have following three kinds of ways:

The first, software detection pattern: multimedia device 40 initiatively sends the polling order grouping, and to detect the state of external HDMI-CEC device, this kind pattern is same as the prior art.

The second, hardware detection pattern: multimedia device 40 can initiatively not send the polling order grouping, but utilize the testing result of checkout gear 404, only when external HDMI-CEC device plug, hand over (Handshaking) program of holding, to obtain necessary state information.

Three, mix detecting pattern: multimedia device 40 mixes above-mentioned two kinds of detecting patterns, and after checkout gear 404 had detected an external HDMI-CEC device plug, multimedia device 40 can continue this external HDMI-CEC device automatic regular polling.

Therefore, by checkout gear 404, multimedia device 40 can be selected the hardware detection pattern or mix detecting pattern, reaches dynamic and real-time detection, to improve the shortcoming of prior art.Should be noted, in Fig. 4, the acquisition module 406 of checkout gear 404 and logic module 408 are in order to operate required step corresponding to it.In fact, those skilled in the art with software or hardware mode, designs satisfactory framework when required according to system, also can utilize already present circuit or assembly etc. in the multimedia device 40, according to aforesaid concept, realizes purpose of the present invention.

For instance, in Fig. 5, a detecting unit 500 and resistance R a1～Ran then realize logic module 408 in order to realize acquisition module 406, one processors 502.Wherein, resistance R a1～Ran can be considered the electrical signal generation unit, is used for connection situation according to connectivity port HDMI_P1～HDMI_Pn, produces corresponding simulation electrical signal, and its source can be to be provided due to the power supply (such as 5 volts) by external device.And detecting unit 500 can be the detector of GPIO in the operating module 402 (General PurposeInput/Output) pin, it can be according to default (as by processor 502 controls), periodically detect the simulation electrical signal that resistance R a1～Ran sends, to judge the electric information of connectivity port HDMI_P1～HDMI_Pn.

When using the GPIO pin to detect the simulation electrical signal of connectivity port HDMI_P1～HDMI_Pn, detecting unit 500 needs regularly (such as per 0.1 millisecond) to detect the electrical signal of a resistance R a1～Ran.In addition, also available IRQ (Interrupt) pin detects, and then 502 need of processor are when interrupting occuring, and the unusual fluctuation variation of just inspecting connectivity port HDMI_P1～HDMI_Pn gets final product, and does not need regularly to detect, to save system resource.

In addition, the analog-to-digital converter of the operating module 402 of also can arranging in pairs or groups is to realize acquisition module 406.For example, in Fig. 6, a Digital Detecting unit 600, resistance R b1～Rbn and simulate to digital translation unit 604 in order to realizing acquisition module 406, and processor 602 is in order to realize logic module 408.Comparison diagram 6 and Fig. 5 are as can be known, the electrical signal of resistance R b1～Rbn can be through being converted to the voltage signal V_ADC with digital meaning among Fig. 6 from analog to digital translation unit 604, therefore Digital Detecting unit 600 can be the microcontroller of operating module 402, thus, as long as suitably set the value of resistance R b1～Rbn and simulate the resistance R L that comprises to digital translation unit 604 and the value of capacitor C, can by default firmware or program code, correctly judge the connection status of connectivity port HDMI_P1～HDMI_Pn.For instance, if the quantity n of connectivity port HDMI_P1～HDMI_Pn equals 4, then can select the resistance R b1 of 27K Ω, 51K Ω, 68K Ω, 91K Ω～Rb4, the resistance R L of 20K Ω, and the capacitor C of 20pF.In this case, 5 volts of power supplys by external device provides can draw conversion table as shown in Figure 7, and its 16 kinds of showing connectivity port HDMI_P1～HDMI_P4 connect situation, and corresponding voltage signal V_ADC and 8 bit digital value.By this, Digital Detecting unit 600 can regularly detect voltage signal V_ADC, produces corresponding digital value, to judge the connection situation of connectivity port HDMI_P1～HDMI_P4, so that multimedia device 40 can when external HDMI device plug is arranged, be made a response immediately.

In addition, in multimedia device 40, switch controller 400 includes a register usually, be used for keeping in the connection situation of connectivity port HDMI_P1～HDMI_Pn, then when realizing acquisition module 406, also can pass through a data-reading unit, regularly read the interior data of register of switch controller 400, judge the operation situation of connectivity port HDMI_P1～HDMI_Pn for logic module 408.

Therefore, from the above, by the detection mode beyond the CEC standard, the present invention can provide tool flexible detecting pattern, but and Effective Raise detection efficiency and resource utilization.Further, after the connection situation that detects connectivity port HDMI_P1～HDMI_Pn, multimedia device 40 can carry out corresponding processing, for example the unusual fluctuation message of output connection port HDMI_P1～HDMI_Pn.Should be noted, the running that multimedia device 40 is done according to the testing result of checkout gear 404 should be decided on the different system demand, and suitably increases or utilize original function or assembly in the operating module 402, to reach the particular procedure effect.For example, can in operating module 402, increase or utilize its original indication message generation unit, producing the indication message, and by signal corresponding to output unit output (such as display text or pattern, send the sound, flashing light etc.), or be stored in the storage element.Specifically, if multimedia device 40 is television sets, when the connection status that a connectivity port is arranged among the HDMI_P1～HDMI_Pn of connectivity port changes, can be in the variation situation of this connectivity port of screen display, or will be stored in the memory, when person to be used inquires about OSD, just show its detailed content.Yet, should be noted, no matter how follow-up processing mode carries out, its main concept all is after building on checkout gear 404 and having obtained the connection status of connectivity port HDMI_P1～HDMI_Pn.Therefore, on using, the designer should according to the actual requirements, suitably adjust flow process and the system architecture of follow-up running, and be not limited to this.

On the other hand, above-described embodiment is all take terminal installations such as TV or displays as example, in fact, because the HDMI system can comprise relay, and therefore, also can be with conception deriving of the present invention to relay.Please refer to Fig. 8, Fig. 8 is the schematic diagram of the embodiment of the invention one HDMI relay 80.HDMI relay 80 can be meet the HDMI standard one to one, the signal switching device of one-to-many, many-one or multi-to-multi, and can have simultaneously signal and add powerful, but not as limit.HDMI relay 80 includes connectivity port HDMI_P1～HDMI_Pn, a switch controller 800, an operating module 802 and a checkout gear 804.The framework of HDMI relay 80 is similar to the multimedia device of Fig. 4 40, but different be that function and the checkout gear 404 of checkout gear 804 is incomplete same.Checkout gear 804 comprises an acquisition module 806 and a delivery module 808.The function mode of acquisition module 806 is identical with acquisition module 406, also is used for obtaining the electric information of connectivity port HDMI_P1～HDMI_Pn, such as the voltage of each connectivity port, electric current, voltage difference, difference between current etc.Delivery module 808 then is the result that acquisition module 806 is obtained, turns to reach terminal installation (or another relay).In other words, HDMI relay 80 can be according to the electric information of connectivity port HDMI_P1～HDMI_Pn, judge the connection situation of connectivity port HDMI_P1～HDMI_Pn, reach terminal installation (such as multimedia device 40) but merely obtained information is turned, judged according to this connection situation of each HDMI original device by terminal installation.

Therefore, by the present invention, in the multimedia system that meets the HDMI-CEC standard, terminal installation is except the unusual fluctuation situation that can correctly judge direct-connected original device, can by the biography that turns of relay, judge the unusual fluctuation situation of the original device that relay connects simultaneously.Thus, the user can correctly judge the situation of external device, to promote ease of use.For instance, Fig. 9 A to Fig. 9 E shows respectively the different operating situation of a HDMI-CEC television set 90.Suppose that HDMI-CEC television set 90 comprises four HDMI connectivity ports, be respectively HDMI_P1, HDMI_P2, HDMI_P3 and HDMI_P4, and HDMI-CEC television set 90 is designed according to concept of the present invention, can utilize the hardware detection pattern or mix detecting pattern, reach dynamic and real-time detection.If not yet connect at the beginning external device, then the related physical connection table is shown in Fig. 9 A Lower Half.Then, if connectivity port HDMI_P1 connects not the DVD player of start, then HDMI television set 90 connection status that can detect immediately connectivity port HDMI_P1 changes, and is updated to shown in Fig. 9 B Lower Half with being about to the physics connection table.Next, if connectivity port HDMI_P4 connects not the Blu-ray player of start, and after the DVD player on the HDMI_P1 of connectivity port came into operation, then HDMI television set 90 can be updated to the physics connection table shown in Fig. 9 B Lower Half immediately.On the other hand, continuity Fig. 9 B is if connectivity port HDMI_P3 connects one 6 pairs 1 switch (six input port P1～P6, an output port P0); This switch is (such as Fig. 8) designed according to this invention, and the input port P2 of switch connects the Blu-ray player of having started shooting, and then HDMI television set 90 can be updated to the physics connection table shown in the Lower Half of Fig. 9 D immediately.Continuity Fig. 9 D, if the input port P5 of switch connects holder for TV playing (not start) again, then HDMI television set 90 can be updated to the physics connection table shown in the Lower Half of Fig. 9 E immediately.

Therefore, by detection mode of the present invention, when HDMI television set 90 can change in the connection status of arbitrary input port of connectivity port HDMI_P1～HDMI_P4 or switch, make a response immediately, and upgrade corresponding physics connection table.Further, HDMI television set 90 more behind the new physics connection table, can further show the content of upgrading, or it is stored, just show when person to be used inquires about.

In the prior art, support the HDMI terminal installation of CEC standard to send the polling order grouping with regard to beard and hair at set intervals, or when increase newly/removing one or more HDMI-CEC device, carried out once by the user passively and manually upgrade.Be sent as example with fixed intervals, if it is too short to send the time interval of polling order grouping, can increase on foot the burden of system, if the oversize Operational Figure Of Merit that then can have influence on User's Interface of the time interval; And the mode of manually upgrading is minimum to the load of system, but the problem of operation ease is arranged.In comparison, the present invention is by the path beyond the CEC channel, carries out the detection of external device unusual fluctuation, but except real time reaction, also can reduce the transmission frequency of polling order grouping, reduces system burden, increases simultaneously resource utilization.In addition, in conjunction with detection mode of the present invention, terminal installation can provide and have more flexible detecting pattern, and the convenience of Effective Raise when using.

Further, the detection function mode of multimedia device 40 can be summarized as a flow process 100 and sub-process 120,140,160 thereof, shown in Figure 10 A, Figure 10 B, Figure 10 C and Figure 10 D.Shown in Figure 10 A, flow process 100 comprises following steps:

Step 102: beginning.

Step 104: judge that multimedia device 40 is with software detection Mode S W_DT, hardware detection pattern HW_DT or mixes detecting pattern MX_DT and carry out the detection of external device.If multimedia device 40 is to carry out the detection of external device with software detection Mode S W_DT, then carry out sub-process 120; If multimedia device 40 is to carry out the detection of external device with hardware detection pattern HW_DT, then carry out sub-process 140; If multimedia device 40 is to mix the detection that detecting pattern MX_DT carries out external device, then carry out sub-process 160.

Shown in Figure 10 B, sub-process 120 comprises following steps:

Step 122: operating module 402 sends the polling order grouping by CEC channel CH_CEC.

Step 124: the restore message that operating module 402 receives with respect to the polling order grouping, to detect the connection status of connectivity port HDMI_P1～HDMI_Pn.

Shown in Figure 10 C, sub-process 140 comprises following steps:

Step 142: acquisition module 406 is regularly obtained the electric information of connectivity port HDMI_P1～HDMI_Pn.

Step 144: the electric information that logic module 408 is obtained according to acquisition module 406, judge the connection situation generation unusual fluctuation that whether has a connectivity port among the HDMI_P1～HDMI_Pn of connectivity port at least.If then carry out step 146; If not, then get back to step 142.

Step 146: 402 pairs of operating modules connect the connectivity port of situation generation unusual fluctuation and hand over the program of holding.

Shown in Figure 10 D, sub-process 160 comprises following steps:

Step 162: acquisition module 406 is linked to connectivity port HDMI_P1～HDMI_Pn in the IRQ mode, to obtain the electric information of connectivity port HDMI_P1～HDMI_Pn.

Step 164: the electric information that logic module 408 is obtained according to acquisition module 406, judge the connection situation generation unusual fluctuation that whether has a connectivity port among the HDMI_P1～HDMI_Pn of connectivity port at least.If then carry out step 166; If not, then get back to step 162.

Step 166: logic module 408 or operating module 402 judge whether the connectivity port that connects situation generation unusual fluctuation is insertion.If then carry out step 168; If not, then carry out step 170.

Step 168: 402 pairs of operating modules connect the connectivity port of situation generation unusual fluctuation and regularly send the polling order grouping, and get back to step 162, to continue to detect the connection status of other connectivity port.

Figure 10 A to Figure 10 D is relevant to the different mode that multimedia device 40 is obtained testing result, and detailed description can be with reference to aforementioned.In addition, multimedia device 40 is obtained the function mode after the testing result, can be summarized as a flow process 1100, and it comprises following steps:

Step 1102: beginning.

Step 1104: checkout gear 404 or operating module 402 are judged the connection situation generation unusual fluctuation that whether has a connectivity port among the HDMI_P1～HDMI_Pn of connectivity port at least.If then carry out step 1106; If not, then get back to step 1104.

Step 1106: operating module 402 judges that one shows whether connect the unusual fluctuation function starts.If then carry out step 1108; If not, then carry out step 1110.

Step 1108: operating module 402 output indication messages, to show the relevant information that connects situation generation unusual fluctuation.

Step 1110: operating module 402 stores the relevant information that connects situation generation unusual fluctuation.

According to flow process 1100, when checkout gear 404 or operating module 402 detect the connection situation generation unusual fluctuation of a connectivity port, if the user is just opening OSD or multimedia device 40 has been set the relevant information that automatic demonstration connects situation generation unusual fluctuation, then show the relevant information that connects situation generation unusual fluctuation, otherwise store the relevant information that connects situation generation unusual fluctuation.

In sum, the present invention is by the path beyond the CEC channel, carries out the detection of external device unusual fluctuation, but except real time reaction, also can reduce the transmission frequency of polling order grouping, reduce system burden, can provide simultaneously to have more flexible detecting pattern, and the convenience of Effective Raise when using.

The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims

1. a detection method is used for the connecting state that a multimedia device that meets the high resolution multimedia interface specification detects a plurality of connectivity ports, and this detection method includes:

Obtain a plurality of electric informations of these a plurality of connectivity ports; And

According to these a plurality of electric informations, judge the connection situation of these a plurality of connectivity ports,

Described detection method also comprises:

By a connectivity port of these a plurality of connectivity ports, obtain a plurality of electric informations of a plurality of relay connection ports of a relay; And

According to these a plurality of electric informations of these a plurality of relay connection ports, judge the connection situation of these a plurality of relay connection ports.

2. detection method as claimed in claim 1 wherein obtains the step of these a plurality of electric informations of these a plurality of connectivity ports, is according to a predetermined period, regularly obtains this a plurality of electric informations.

3. detection method as claimed in claim 1 wherein obtains the step of these a plurality of electric informations of these a plurality of connectivity ports, includes:

Obtain a plurality of simulation electrical signals of these a plurality of connectivity ports; And

Should transfer digital pattern to by a plurality of simulation electrical signals, to obtain this a plurality of electric informations.

4. detection method as claimed in claim 1 wherein obtains the step of these a plurality of electric informations of these a plurality of connectivity ports, is a register that reads the switch controller under these a plurality of connectivity ports, to obtain this a plurality of electric informations.

5. detection method as claimed in claim 1 wherein obtains the step of these a plurality of electric informations of these a plurality of connectivity ports, is connecting state in these a plurality of connectivity ports when changing, and receives these a plurality of electric informations that sent by these a plurality of connectivity ports.

6. detection method as claimed in claim 1, wherein this multimedia device is a terminal installation.

7. detection method as claimed in claim 6, wherein this terminal installation is an image player.

8. detection method as claimed in claim 1, it also comprises the connection situation according to this a plurality of connectivity ports, produces one and indicates message.

9. detection method as claimed in claim 8, it also comprises this indication message of output.

10. detection method as claimed in claim 8, it also comprises and stores this indication message.

11. a checkout gear is used for the connecting state that a multimedia device that meets the high resolution multimedia interface specification detects a plurality of connectivity ports, this checkout gear includes:

One acquisition module is used for obtaining a plurality of electric informations of these a plurality of connectivity ports; And

One logic module is used for judging the connection situation of these a plurality of connectivity ports according to these a plurality of electric informations,

Wherein this acquisition module also is used for the connectivity port by these a plurality of connectivity ports, obtain a plurality of electric informations of a plurality of relay connection ports of a relay, and this logic module also is used for these a plurality of electric informations according to these a plurality of relay connection ports, judges the connection situation of these a plurality of relay connection ports.

12. checkout gear as claimed in claim 11, wherein this acquisition module is according to a predetermined period, regularly obtains this a plurality of electric informations.

13. checkout gear as claimed in claim 11, wherein this acquisition module includes:

A plurality of electrical signal generation units are coupled to this a plurality of connectivity ports, are used for producing a plurality of simulation electrical signals of these a plurality of connectivity ports; And

One detecting unit is used for detecting these a plurality of simulation electrical signals, to obtain this a plurality of electric informations.

14. checkout gear as claimed in claim 13, wherein an electrical signal generation unit of these a plurality of electrical signal generation units is a resistance.

15. checkout gear as claimed in claim 13, it also comprises simulates to the digital translation unit, is used for transferring these a plurality of simulation electrical signals to digital pattern.

16. checkout gear as claimed in claim 11, wherein this acquisition module is a register that reads the affiliated switch controller in these a plurality of connectivity ports, to obtain this a plurality of electric informations.

17. checkout gear as claimed in claim 11, wherein this acquisition module is when the connecting state of these a plurality of connectivity ports changes, and receives these a plurality of electric informations that sent by these a plurality of connectivity ports.

18. checkout gear as claimed in claim 11, wherein this multimedia device is a terminal installation.

19. checkout gear as claimed in claim 18, wherein this terminal installation is an image player.

20. checkout gear as claimed in claim 11, it also comprises an indication message generation unit, is used for connection situation according to this a plurality of connectivity ports, produces one and indicates message.

21. checkout gear as claimed in claim 20, it also comprises an output unit, is used for exporting this indication message.

22. checkout gear as claimed in claim 20, it also comprises a storage element, is used for storing this indication message.

23. a multimedia device is used for a multimedia system that meets the high resolution multimedia interface specification, this multimedia device includes:

A plurality of connectivity ports;

One switch controller is coupled to this a plurality of connectivity ports, is used for switching the signal of a connectivity port of exporting these a plurality of connectivity ports;

One operating module is used for processing the signal that this switch controller is exported; And

One checkout gear includes:

24. multimedia device as claimed in claim 23, wherein this acquisition module is regularly obtained this a plurality of electric informations according to a predetermined period.

25. multimedia device as claimed in claim 23, wherein this acquisition module includes:

26. multimedia device as claimed in claim 25, wherein an electrical signal generation unit of these a plurality of electrical signal generation units is a resistance.

27. multimedia device as claimed in claim 25, it also comprises simulates to the digital translation unit, is used for transferring these a plurality of simulation electrical signals to digital pattern.

28. multimedia device as claimed in claim 23, wherein this switch controller comprises a register, is used for storing these a plurality of electric informations, and this acquisition module reads this register, to obtain this a plurality of electric informations.

29. multimedia device as claimed in claim 23, wherein this acquisition module is when the connecting state of these a plurality of connectivity ports changes, and receives these a plurality of electric informations that sent by these a plurality of connectivity ports.

30. multimedia device as claimed in claim 23, wherein this multimedia device is a terminal installation.

31. multimedia device as claimed in claim 30, wherein this terminal installation is an image player.

32. multimedia device as claimed in claim 23, wherein this operating module also comprises an indication message generation unit, is used for connection situation according to this a plurality of connectivity ports, produces one and indicates message.

33. multimedia device as claimed in claim 32, wherein this operating module also comprises an output unit, is used for exporting this indication message.

34. multimedia device as claimed in claim 32, wherein this operating module also comprises a storage element, is used for storing this indication message.