CN102930847A - Multi-switching display control device, matrix type display control device and control method thereof - Google Patents
Multi-switching display control device, matrix type display control device and control method thereof Download PDFInfo
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Abstract
The invention relates to a multi-switching display control device which is used for controlling multiple audio and video source and comprises a plurality of display verification units respectively provided with secret key chips and a host-machine verification unit with a host-machine secret key chip, wherein each secret key chip verifies a corresponding audio and video playing device so as to respectively generate a golden key, each audio and video playing device generates an audio and video signal according to each golden key, the host-machine secret key chip verifies a display device to generate a host-machine golden key, and the display device receives audios and videos provided by each audio and video playing device according to the host-machine golden key; and when the display device receives the audio and video source from one of the audio and video playing devices, the rest audio and video playing devices respectively send out a verification request to the corresponding display verification unit and receive the playing state maintained after a verification reply sent back by each display verification unit, and thus, the use convenience is increased.
Description
Technical field
The invention relates to a kind of audio-visual source switching device shifter and control method thereof, particularly relevant for many switchings, matrix form display control unit and the control method thereof of a kind of HDCP (HDCP).
Background technology
Along with the consideration of user demand and operating environment, more and more users are when playing audio/video signal, and the how audio-visual source of normal collocation switched system offers the more user demand of user.On the framework of how audio-visual source switched system, roughly be to comprise a plurality of input ends, commutation circuit and a plurality of output terminal.Each input end is connected with a video-audio playing device, each output terminal then is to connect a display device (such as screen, projector etc.), select video-audio playing device to provide audio-visual by commutation circuit and originate to display device, so that display device shows the video content of wanting to view and admire.
On the other hand, along with the development of video-audio signal form, the user can have the visual enjoyment that digitizing high definition (High Definition) film brings at present.And be used at present storing the Storage Media of high definition video-audio signal, the CD of blue light specification (Blu-ray Disc) and high definition CD specification (HD DVD) is arranged.In addition, when transmitting, be unlikely to suffer illegal copies in order to ensure digitized video-audio signal, also formulated at present the protection mechanism of HDCP (High-bandwidth Digital Content Protection, HDCP).In other words, audio-visual input media and video and audio output device both must have HDCP authentication (in have HDCP key chip) could successfully transmit the video-audio signal of HDCP protection.If any one is not equipped with this key chip, the image picture element of then exporting might reduce, even can not play etc.Subsidiary one carry be; that design will be verified once in about 2 seconds at HDCP protection mechanism technical; therefore must continue to keep online between audio-visual input media and the video and audio output device and keep open state just can make checking that everything goes well with your work finishes, play that operation is complete to be carried out and allow.
In sum, switch on the display device when showing if user's wish derives from a plurality of HDCP of being subjected to protection audio-visual, then following problem may occur.Because the design of present how audio-visual switched system is directly the key information of video-audio playing device to be passed to display device to verify.Thus, when originating when switching to another video-audio playing device to the video-audio playing device of display device by providing at present audio-visual, because the rear video-audio playing device that switches must re-start checking with current display device, and causes the video-audio playing device of rear switching can replay video content.
Therefore; for how audio-visual source switched system; to how to keep the checking protection mechanism of HDCP; and a plurality of video-audio playing devices can be play on selected display device; and when switching, do not interrupt the current video content of playing of video-audio playing device, become one of researchist's problem to be solved.
Summary of the invention
The embodiment of the invention is to provide a kind of display control unit, matrix form display control unit and control method thereof switched more, to allow each video-audio playing device can not be subject to the impact that signal switches, and can continue the maintenance broadcast state, to transmit video-audio signal to display device, promote ease of use with this.
According to the display control units that switch disclosed by the invention more, the audio-visual source that is provided by plural video-audio playing device that is applicable to that the control display device receives.The described display control unit that switches comprises more: two or more demonstration authentication units, each shows that authentication unit includes the key chip, wherein each key chip is verified with each corresponding video-audio playing device, producing respectively golden key, and make each video-audio playing device produce audio-visual frequency signal according to each golden key; An and host verification unit, the host verification unit includes the host key chip, wherein host key chip and display device are verified, with generation main frame gold key, and make display device receive the audio-visual frequency signal that each video-audio playing device provides according to main frame gold key; When wherein one of them provides for each video-audio playing device in the audio-visual source that display device receives, all the other video-audio playing devices send respectively checking and ask to corresponding demonstration authentication unit, and keep broadcast state after receiving the checking answer that respectively shows the authentication unit passback.
According to matrix form display control unit disclosed by the invention, be applicable to control audio-visual source that plural display device receives by being provided by plural video-audio playing device, its matrix form display control unit comprises: plural demonstration authentication unit, each shows that authentication unit includes a key chip, wherein each key chip is verified with each corresponding video-audio playing device, producing respectively a gold medal key, and make each video-audio playing device produce audio-visual frequency signal according to each golden key; And plural host verification unit, each host verification unit includes a host key chip, wherein each host key chip is verified with each corresponding display device, to produce main frame gold key, and make each display device receive the audio-visual frequency signal that this video-audio playing device respectively provides according to each main frame gold key, when wherein one of them provides for each video-audio playing device in the audio-visual source that each display device receives, all the other video-audio playing devices send respectively checking and ask to corresponding demonstration authentication unit, and keep broadcast state after receiving the checking answer that respectively shows the authentication unit passback.
The present invention also provides a kind of control method, and described method can be in order to control above-mentioned many switchings display control unit or matrix form display control unit.
In other words, the present invention is a kind of display control unit that switches more, is applicable to control a display device reception and provides audio-visual source by two above image players, and wherein, these display control units that switch comprise more:
Two or more demonstration authentication units, respectively this demonstration authentication unit includes the key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, producing respectively golden key, and makes respectively this video-audio playing device according to respectively producing video-audio signal by the gold key; And
The host verification unit, this host verification unit includes the host key chip, wherein this host key chip and this display device are verified, producing main frame gold key, and make this display device receive the video-audio signal that this video-audio playing device respectively provides according to this main frame gold key;
Wherein in this audio-visual source that this display device receives for this video-audio playing device respectively wherein one when providing, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
The display control unit that switches of the present invention wherein also comprises more:
Processing unit produces demonstration control data, the display capabilities that these demonstration control data have this display device of control;
Link block in order to connecting this display device, and is transmitted this audio-visual source to this display device;
Video control unit, couple these and show authentication unit, this host verification unit, this link block and this processing unit, this video control unit accept the control of this processing unit and choose these video-audio playing devices that this main frame linkage unit connects wherein one, and these audio-visual sources are outputed to this display device via this link block; And
Operation interface is connected in this processing unit, produces operational order in order to accept operation, and transmits this operational order to this processing unit;
Wherein, this processing unit is controlled this video control unit according to this operational order and is switched, or the content of these demonstration control data of control change.
The display control unit that switches of the present invention, wherein this link block is digital visual interface module, high resolution multimedia interface module or digital display port interface module more.
The display control unit that switches of the present invention, wherein this operation interface is change-over switch, button, screen display interface or infrared communication interface more.
A kind of matrix form display control unit of the present invention is applicable to control plural display device reception and provides audio-visual source by plural video-audio playing device, and wherein, this matrix form display control unit comprises:
Plural demonstration authentication unit, respectively this demonstration authentication unit includes the key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, producing respectively golden key, and makes respectively this video-audio playing device according to respectively producing video-audio signal by the gold key; And
Plural host verification unit, respectively this host verification unit includes the host key chip, wherein respectively this host key chip is verified with corresponding respectively this display device, producing main frame gold key, and make this display device respectively receive the video-audio signal that this video-audio playing device respectively provides according to this main frame gold key respectively;
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively wherein one when providing, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
Matrix form display control unit of the present invention, wherein how the switching display control units are accepted the user operates to select any one video-audio playing device to play this video-audio signal.
A kind of control method according to matrix form display control unit of the present invention, wherein, this control method includes the following step:
When respectively this demonstration authentication unit receives the checking request of corresponding respectively this video-audio playing device, verify with corresponding respectively this video-audio playing device by this key chip in this demonstration authentication unit respectively, to produce this gold key, make this video-audio playing device respectively produce video-audio signal according to this gold key of correspondence;
When respectively this host verification unit receives the checking request of corresponding respectively this display device, verify with corresponding respectively this display device by this host key chip in this host verification unit respectively, to produce this main frame gold key, making respectively, this display device receives video-audio signal according to this main frame gold key; And
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
The control method of a kind of display control unit of the present invention, the audio-visual source that receives in order to control at least one display device, described audio-visual source is provided by plural video-audio playing device, this display control unit comprises demonstration authentication unit and at least one host verification unit more than at least two, wherein, this control method includes the following step:
When respectively this demonstration authentication unit receives the checking request of corresponding respectively this video-audio playing device, verify with corresponding respectively this video-audio playing device by the key chip in this demonstration authentication unit respectively, to produce respectively golden key, make this video-audio playing device respectively produce video-audio signal according to this gold key of correspondence;
When described at least one host verification unit receives the checking request of this display device, verify with this corresponding display device respectively by the host key chip in this host verification unit, to produce main frame gold key, make this display device receive video-audio signal according to this corresponding main frame gold key; And
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
In sum, the present invention arranges many group keys chip in many switchings display control unit and matrix form display control unit, offer respectively each video-audio playing device and display device and carry out required checking, and when carrying out the change action in different audio-visual sources, the video-audio playing device that makes rear switching is sustainable the checking still, avoid occuring interrupting to re-start checking and the problem of playing because of checking, again promote convenience and the dirigibility of use with this.
For enabling further to understand feature of the present invention and technology contents, please refer to following relevant detailed description of the present invention and accompanying drawing, yet appended graphic only be for provide with reference to and the usefulness of explanation, the present invention is limited.
Description of drawings
Fig. 1 is the system block diagram that display control unit embodiment is switched in the present invention more.
Fig. 2 is the system block diagram of matrix form display control unit embodiment of the present invention.
Fig. 3 is the configuration diagram of matrix form display control unit embodiment of the present invention.
Fig. 4 is the control method process flow diagram of display control unit of the present invention.
The explanation of Reference numeral
Switching display control unit 10 more
10a matrix form display control unit
100 first main frame linkage units
101 second main frame linkage units
104 video control units
108 processing units
112 operation interfaces
114 link blocks
114a the first link block
114b the second link block
116 first show linkage unit
118 second show linkage unit
120 first show authentication unit
120a the first key chip
122 second show authentication unit
122a the second key chip
124 first host verification unit
124a the first host key chip
126 second host verification unit
126a the second host key chip
11 first video-audio playing devices
12 second video-audio playing devices
14 display device
16 first display device
18 second display device
Switching display control unit 40 more
400 link blocks
402 show linkage unit
406 main frame linkage units
410 power switches
412 buttons
44 display device
S1～S5 flow chart step explanation
Embodiment
(switching display control unit embodiment) more
Please refer to Fig. 1, Fig. 1 is the system block diagram of one of them device embodiment of the present invention.Many switchings display control unit 10 of Fig. 1 includes the first main frame linkage unit 100, the second main frame linkage unit 101, first shows that authentication unit 120, second shows authentication unit 122, video control unit 104, the first host verification unit 124 and link block 114.
The display control units 10 that switch are connected with the first video-audio playing device 11 by the first main frame linkage unit 100 more.The display control units 10 that switch are connected with the second video-audio playing device 12 by the second main frame linkage unit 101 more.Described the first main frame linkage unit 100, the second main frame linkage unit 101 directly and the connection line between the video control unit 104 can be in order to the transmitting image signal.Described the first video-audio playing device 11 and the second video-audio playing device 12 can be the appliance arrangement that desk computer host, server, notebook computer, video player (such as blue light player, DVD or VCD) etc. meet the HDCP technology.The display control units 10 that switch are connected with display device 14 by link block 114 more, and display device 14 then can be the image output equipment such as negative electrode iconoscope (CRT) screen or LCD screen.Described link block 114 includes first and shows linkage unit 116.
In addition, for convenience of description, in embodiments of the present invention processing unit 108 and operation interface 112 are arranged at the outsides of switching display control unit 10 more.In preferred embodiment, also processing unit 108 and operation interface 112 can be arranged at the inside of switching display control unit 10 more, and processing unit 108 can show that with described first authentication unit 120, second shows that authentication unit 122, video control unit 104, the first host verification unit 124 are connected, and processes or transmit operation with the signal of being correlated with respectively.
For instance, operation interface 112 can comprise two buttons, each button is corresponding to a main frame linkage unit, when the user presses one of them button, the button that is pressed is to processing unit 108 output signals, after processing unit 108 is judged the button that is pressed and corresponding main frame linkage unit according to the source of signal, can control video control unit 104 and switch to described respective hosts linkage unit, so that the audio-visual source that the first video-audio playing device 11 or the second video-audio playing device 12 provide outputs to corresponding display device 14 by described the first main computer unit 100 or the second main frame linkage unit 101.
Therefore, the user can see in display device 14 video image of the first video- audio playing device 11 or 12 outputs of the second video-audio playing device, and the sound of hearing the first video- audio playing device 11 or 12 outputs of the second video-audio playing device.In other words, the user can carry out by operation interface 112 operation of choosing of the first video-audio playing device 11 or the second video-audio playing device 12.
In other embodiments, operation interface 112 can be infrared communication interface, is the infrared receiver module for example, the operational order that produces in order to receiving infrared-ray signal.The user can utilize the remote controls such as telepilot to send instruction to display control unit 10, also can make the display control units 10 that switch switch to the first indicated video-audio playing device 11 of user or the second video-audio playing device 12 according to operational order more, and in display device 14, show corresponding video data.
In the middle of another embodiment, operation interface 112 is except being used for producing the operational order of specifying the first video-audio playing device 11 or the second video-audio playing device 12, also can indicate processing unit 108 to adjust or revise the demonstration that is temporary in the storage unit (not shown) and control data, change video data with this and output to display device 14 shown results out.
Take screen display (OSD) interface as operation interface 112 as example, the menu that the user can utilize screen display interface to provide, the collocation telepilot is chosen the project in the menu, and the parameter of change setting, for example change the original resolution of setting of display device 14, choose different audio track numbers, change level or vertical synchronizing frequency, start or close three-dimensional display function, or start or close network on-line function etc.
After processing unit 108 receives the operational order of above-mentioned one or more change demonstration control data, the parameter of the demonstration control data of corresponding amendment record in storage unit.Thus, the demonstration control data of upgrading in the first video-audio playing device 11 or the second video-audio playing device 12 reading cells (not shown)s, and generation is corresponding to the video image of user's demand.
First shows that authentication unit 120 is connected with the first main frame linkage unit 100.First shows that authentication unit 120 includes the first key chip 120a.The first key chip 120a is in order to verify with the first video-audio playing device 11, to produce the first gold medal key.The first video-audio playing device 11 produces the first audio-visual frequency signal according to the first gold medal key, and as the first audio-visual source.
In other words, when starting, the first video-audio playing device 11 just can produce the first authentication information, be used for requiring to verify, at this moment, the first demonstration authentication unit 120 just can be verified with the first video-audio playing device 11, and after being proved to be successful, the just smooth broadcasts of the first video-audio playing device 11 produce corresponding audio-visual frequency signal, with as the described first audio-visual source.
In addition, first shows that authentication unit 120 is made of Video processing integrated circuit (IC), and described the first key chip 120a can be integrated in the first demonstration authentication unit 120, and perhaps Independent places the storage unit (not shown).
Second shows that authentication unit 122 is connected with the second main frame linkage unit 101.Second shows that authentication unit 122 includes the second key chip 122a.The second key chip 112a is in order to verify with the second video-audio playing device 12, to produce the second gold medal key.The second video-audio playing device 12 produces the second audio-visual frequency signal according to the second gold medal key, and as the second audio-visual source.
In other words, when starting, the second video-audio playing device 12 just can produce the second authentication information, be used for requiring to verify, at this moment, the second demonstration authentication unit 122 just can be verified with the second video-audio playing device 12, and after being proved to be successful, the just smooth broadcasts of the second video-audio playing device 12 produce corresponding video-audio signal, with as the described second audio-visual source.Same, second shows that authentication unit 122 is made of Video processing integrated circuit (IC), and described the second key chip 122a can be integrated in the second demonstration authentication unit 122, and perhaps Independent places the storage unit (not shown).
In addition, explain as an example of two video-audio playing devices example among the first embodiment, it is not the number of connection that limits video-audio playing device, when if video-audio playing device is plural quantity, then need the corresponding quantity that shows authentication unit that increases, so that each video-audio playing device carries out audio-visual source when switching by many switchings display control unit 10, can keep broadcast state and do not interrupt.
The first host verification unit 124 is connected with video control unit 124.The first host verification unit 124 includes the first host key chip 124a.The first host key chip 124a is in order to verify with display device 14, to produce the first main frame gold key.Described display device 14 receives the first video-audio signal or the second video-audio signal according to the first main frame gold key.
In simple terms, the first host verification unit 124 is mainly in order to carry out proving program with display device 14.Described proving program can be same or similar in the first proving program that shows between authentication unit 120 and the first main frame linkage unit 100.
In addition, according to the magnitude setting of display device 14, can the corresponding magnitude setting that increases or reduce by the first main authentication unit 124.Same, the first host verification unit 124 is made of Video processing integrated circuit (IC), and described the first host key chip 124a can be integrated in the first host verification unit 124, and perhaps Independent places the storage unit (not shown).
(matrix form display control unit embodiment)
Next, please refer to Fig. 2, Fig. 2 is the system block diagram of another device embodiment of the present invention.First embodiment of the invention is with the second embodiment difference: the matrix form display control unit 10a of the second embodiment is connected with the first display device 16 and is connected with the second display device 18 with the second host verification unit 126 and the second link block 114b with the first host verification unit 124 and the first link block 114a.Wherein, the second main frame card unit 126 comprises the second host key chip 126a, and the second link block 114b comprises that second shows linkage unit 118.The second host key chip 126a and the second display device 18 are connected in second and show linkage unit 118.All the other parts are identical with the first embodiment haply, below repeat no more.In addition, the matrix form display control unit 10a of the second embodiment can be equivalent to matrix device (matrix).
The second host verification unit 126 is connected with video control unit 124.The second host verification unit 126 includes the second host key chip 126a.The second host verification unit 126 is connected with the second display device 18 by the second link block 114b.The second host key chip 126a is in order to verify with the second display device 18, to produce the second main frame gold key.Described the second display device 18 receives the first video-audio signal or the second video-audio signal according to the second main frame gold key.In simple terms, the second host verification unit 126 is mainly in order to verify with the second display device 18.
Same, the second host verification unit 126 is made of Video processing integrated circuit (IC), and described the second host key chip 126a can be integrated in the second host verification unit 126, and perhaps Independent places the storage unit (not shown).In addition, the first host verification unit 124 is connected with the first display device 16 by the first link block 114a.The first host key chip 124a is in order to verifying with the first display device 16, and producing the first main frame gold key, and the processing of follow-up video-audio signal and transmittance process and illustrated in the first embodiment repeat no more in this.
In addition, explain as an example of two video-audio playing devices example among the second embodiment, it is not the number of connection that limits video-audio playing device, when if video-audio playing device is plural quantity, then need the corresponding quantity that shows authentication unit that increases, so that each video-audio playing device carries out audio-visual source when switching by matrix form display control unit 10a, can keep broadcast state and do not interrupt, when wherein one of them provides for each video-audio playing device in the audio-visual source that each display device receives, all the other video-audio playing devices send respectively checking and ask to corresponding demonstration authentication unit, and keep broadcast state after receiving the checking answer that respectively shows the authentication unit passback.Same, take two display device as example explains, be not the number of connection that limits display device among the second embodiment, display device also can be plural quantity.
Fig. 3 is the configuration diagram of matrix form display control unit embodiment of the present invention.As shown in Figure 3, the display control units 40 that switch comprise link block 400 more, described link block 400 also comprises a plurality of demonstration linkage units 402 that are arranged on surface of shell, each shows that linkage unit 402 can be one and connects slot, in order to connect one to one display device 44 via the screen connecting line with attachment plug.
Except in order to the demonstration linkage unit 402 that connects display device 44, also comprise at least one main frame linkage unit 406, in order to be connected to the first video-audio playing device 11 and the second video-audio playing device 12 by the main frame connecting line.
In addition, switch display control unit 40 more and also can comprise the power switch 410 of opening or closing in order to control display control device 40, and a plurality of button 412 (corresponding to the operation interface 112 of Fig. 1 to Fig. 2).Described a plurality of operation push-button 412 corresponds to respectively a plurality of demonstration linkage units 402 one to one, and the user can directly press any operation push-button 412 wherein to specify the particular host linkage unit 406 that will choose.
(the control method embodiment of display control unit)
Please refer to Fig. 4, Fig. 4 is the control method process flow diagram of display control unit of the present invention, and described display control unit can be the described display control units that switch corresponding to Fig. 1 more, also can be the described matrix form display control unit corresponding to Fig. 2.For ease of understanding, present embodiment will illustrate as an example of many switchings display control unit shown in Figure 1 example, please in the lump with reference to Fig. 1.At first, in the S1 step, the first video-audio playing device 11 sends checking request to the first demonstration authentication unit 120 and verifies, and produces the first video-audio signal after finishing checking.In particular, when first shows that authentication unit 120 receives the checking request of the first video-audio playing device 11, verify by the first key chip 120a and the first video-audio playing device 11 in the first demonstration authentication unit 120, to produce the first gold medal key, make the first video-audio playing device 11 produce the first video-audio signal according to the first gold medal key.
In the S2 step, the second video-audio playing device 12 sends checking request to the second demonstration authentication unit 122 and verifies, and produces the second video-audio signal after finishing checking.In particular, when second shows that authentication unit 122 receives the checking request of the second video-audio playing device 12, show in the authentication unit that by second 122 the second key chip 122a and the second video-audio playing device 12 verify, to produce the second gold medal key, make the second video-audio playing device 12 produce the second audio-visual frequency signal according to the second gold medal key.In addition, above-mentioned S1 step and S2 step can be simultaneously carries out, and perhaps the S1 step is prior to the S2 step, and perhaps the S2 step is prior to the S1 step.
Next, in the S3 step, the operation that display control unit receives the user is take audio-visual source that control display device 14 is received as the first video-audio signal or the second video-audio signal.
In the S4 step, when the audio-visual source that display device 14 receives is the first video-audio signal, the first video-audio playing device 11 sends checking and asks to display device 14, and the checking of receiving and displaying device 14 passbacks is replied, so that the first video-audio playing device 11 keeps broadcast state, wherein the first host verification unit 124 is verified by the first host key chip 124a and display device 14, to produce the first main frame gold key, and described display device 14 receives the first video-audio signal or the second video-audio signal according to the first main frame gold key, and is replied by the described checking of display device 14 passbacks.At this moment, the second video-audio playing device 12 sends the request of checking to the second demonstration authentication unit 122, and receives the checking answer of the second demonstration authentication unit 122 passbacks, so that the second video-audio playing device 12 keeps broadcast states.
In the S5 step, when the audio-visual source that display device 14 receives is the second video-audio signal, the second video-audio playing device 12 sends checking and asks to display device 14, and the checking of receiving and displaying device 14 passbacks is replied, so that the second video-audio playing device 12 keeps broadcast state, wherein the first host verification unit 124 is verified by the first host key chip 124a and display device 14, to produce the first main frame gold key, and described display device 14 receives the first video-audio signal or the second video-audio signal according to the first main frame gold key, and is replied by the described checking of display device 14 passbacks.At this moment, the first video-audio playing device 12 sends the request of checking to the first demonstration authentication unit 120, and receives the checking answer of the first demonstration authentication unit 120 passbacks, so that the first video-audio playing device 11 keeps broadcast states.
In addition, matrix form display control unit (as shown in Figure 2) such as the embodiment of the invention, when if the quantity of video-audio playing device increases, then the designated direct demonstration authentication unit corresponding with it of video-audio playing device in audio-visual source that provide verified, to keep broadcast state, all the other not the video-audio playing device in designated audio-visual source then verify with each self-corresponding demonstration authentication unit, to keep broadcast state.In other words, when wherein one of them provides for each video-audio playing device in the audio-visual source that each display device (the first display device 16 as shown in Figure 2 and/or the second display device 18) receives, all the other video-audio playing devices send respectively the checking request to corresponding demonstration authentication unit, and keep broadcast state after receiving the checking answer that respectively shows the authentication unit passback, the rest may be inferred.
In addition, though the corresponding embodiment of Fig. 4 is take a display device as the example explanation, yet when except the first display device 16, also connecting the second display device 18 such as the matrix form display control unit, corresponding to the second host verification unit 126 of the second display device 18 and the running of the second host key chip 126a, also can analogize above-mentioned explanation about host verification unit 124 and the first host key chip 124a.
(the possible effect of embodiment)
In sum, the present invention arranges many group keys chip in many switchings, matrix form display control unit, offer respectively each video-audio playing device and display device and carry out required checking, and when carrying out the change action in different audio-visual sources, the video-audio playing device that makes rear switching is sustainable the checking still, avoid occuring interrupting to re-start checking and the problem of playing because of checking, again promote convenience and the dirigibility of use with this.
Although embodiment disclosed by the invention as mentioned above, these embodiment only are the usefulness of illustrated example explanation, and should not be interpreted as restriction of the invention process.Within not breaking away from essential scope of the present invention, other change or variation all belong to protection scope of the present invention.
Claims (8)
1. switch display control unit more one kind, be applicable to control a display device and receive and, it is characterized in that these many switching display control units comprise by the audio-visual source that two above image players provide:
Two or more demonstration authentication units, respectively this demonstration authentication unit includes the key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, producing respectively golden key, and makes respectively this video-audio playing device according to respectively producing video-audio signal by the gold key; And
The host verification unit, this host verification unit includes the host key chip, wherein this host key chip and this display device are verified, producing main frame gold key, and make this display device receive the video-audio signal that this video-audio playing device respectively provides according to this main frame gold key;
Wherein in this audio-visual source that this display device receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
2. the display control unit that switches according to claim 1 is characterized in that more, also comprises:
Processing unit produces demonstration control data, the display capabilities that these demonstration control data have this display device of control;
Link block in order to connecting this display device, and is transmitted this audio-visual source to this display device;
Video control unit, couple these and show authentication unit, this host verification unit, this link block and this processing unit, this video control unit accept the control of this processing unit and choose these video-audio playing devices that this main frame linkage unit connects one of them, and these audio-visual sources are outputed to this display device via this link block; And
Operation interface is connected in this processing unit, produces operational order in order to accept operation, and transmits this operational order to this processing unit;
Wherein, this processing unit is controlled this video control unit according to this operational order and is switched, or the content of these demonstration control data of control change.
3. the display control unit that switches according to claim 2 is characterized in that this link block is digital visual interface module, high resolution multimedia interface module or digital display port interface module more.
4. the display control unit that switches according to claim 2 is characterized in that this operation interface is change-over switch, button, screen display interface or infrared communication interface more.
5. matrix form display control unit is applicable to control plural display device and receives and, it is characterized in that this matrix form display control unit comprises by the audio-visual source that plural video-audio playing device provides:
Plural demonstration authentication unit, respectively this demonstration authentication unit includes the key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, producing respectively golden key, and makes respectively this video-audio playing device according to respectively producing video-audio signal by the gold key; And
Plural host verification unit, respectively this host verification unit includes the host key chip, wherein respectively this host key chip is verified with corresponding respectively this display device, producing main frame gold key, and make this display device respectively receive the video-audio signal that this video-audio playing device respectively provides according to this main frame gold key respectively;
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
6. matrix form display control unit according to claim 5 is characterized in that, these many switching display control units are accepted the user and operated to select any one video-audio playing device to play this audio-visual frequency signal.
7. the control method of a matrix form display control unit according to claim 5 is characterized in that, this control method includes the following step:
When respectively this demonstration authentication unit receives the checking request of corresponding respectively this video-audio playing device, verify with corresponding respectively this video-audio playing device by this key chip in this demonstration authentication unit respectively, to produce this gold key, make this video-audio playing device respectively produce video-audio signal according to this gold key of correspondence;
When respectively this host verification unit receives the checking request of corresponding respectively this display device, verify with corresponding respectively this display device by this host key chip in this host verification unit respectively, to produce this main frame gold key, making respectively, this display device receives video-audio signal according to this main frame gold key; And
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
8. the control method of a display control unit, the audio-visual source that receives in order to control at least one display device, described audio-visual source is provided by plural video-audio playing device, this display control unit comprises demonstration authentication unit and at least one host verification unit more than at least two, it is characterized in that this control method includes the following step:
When respectively this demonstration authentication unit receives the checking request of corresponding respectively this video-audio playing device, verify with corresponding respectively this video-audio playing device by the key chip in this demonstration authentication unit respectively, to produce respectively golden key, make this video-audio playing device respectively produce video-audio signal according to this gold key of correspondence;
When described at least one host verification unit receives the checking request of this display device, verify with this corresponding display device respectively by the host key chip in this host verification unit, to produce main frame gold key, make this display device receive video-audio signal according to this corresponding main frame gold key; And
Wherein in this audio-visual source that this display device respectively receives for this video-audio playing device respectively when one of them provides, all the other video-audio playing devices send respectively the checking request to the demonstration authentication unit of correspondence, and keep broadcast state after receiving the checking answer that respectively should show the authentication unit passback.
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