CN102930847B - 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, relate to many switchings of a kind of HDCP (HDCP), matrix form display control unit and control method thereof especially.
Background technology
Along with the consideration of user demand and operating environment, more and more user is when playing audio/video signal, and normal collocation how audio-visual source switched system is supplied to the more user demand of user.On the framework of how audio-visual source switched system, be roughly comprise multiple input end, commutation circuit and multiple output terminal.Each input end is connected with a video-audio playing device, each output terminal is then connection display device (as screen, projector etc.), video-audio playing device is selected to provide audio-visual source to display device by commutation circuit, to make the video content of display device display for viewing and admiring.
On the other hand, along with the development of video-audio signal form, current user can have the visual enjoyment that digitizing high definition (High Definition) film brings.And be used for storing the Storage Media of high definition video-audio signal at present, there is the CD of blue light specification (Blu-ray Disc) and high definition ray Disc specifications (HD DVD).In addition, being unlikely to suffer illegal copies when transmitting in order to ensure digitized video-audio signal, also having formulated the protection mechanism of HDCP (High-bandwidth Digital Content Protection, HDCP) at present.In other words, audio-visual input media and video and audio output device both must have HDCP certification (inside having HDCP key chip) successfully could carry out transmitting the video-audio signal of HDCP protection.If any one is not equipped with this key chip, then exported image picture element likely reduces, and even can not play.Subsidiary one carry be; in HDCP protection mechanism is technically design about 2 seconds will carry out verifying once; therefore must continue between audio-visual input media and video and audio output device to remain online and keep open state just can make checking everything goes well with your work completes, and allow and play that operation is complete to be carried out.
In sum, if user for by multiple by HDCP protection audio-visual derive from a display device carries out switchings show time, then may there is following problem.Design due to current how audio-visual switched system directly the key information of video-audio playing device is passed to display device to verify.Thus, when being switched to another video-audio playing device by the video-audio playing device providing audio-visual source to display device at present, because the rear video-audio playing device switched must re-start checking with current display device, and causes the video-audio playing device of rear switching to replay video content.
Therefore; for how audio-visual source switched system; how to maintain the checking protection mechanism of HDCP; and allow multiple video-audio playing device can play in selected display device; and in time switching, do not interrupt current the play video content of video-audio playing device, become one of researchist's problem to be solved.
Summary of the invention
The embodiment of the present invention is that provide a kind of switches display control unit, matrix form display control unit and control method thereof more, with the impact allowing each video-audio playing device can not be subject to signal switching, and can continue to keep broadcast state, to transmit video-audio signal to display device, promote ease of use with this.
Switch display control unit according to disclosed by the invention more, the audio-visual source provided by plural video-audio playing device that control display device receives is provided.Described many switchings display control unit comprises: two or more display authentication unit, each display authentication unit includes key chip, wherein each key chip is verified with corresponding each video-audio playing device, to produce golden key respectively, and each video-audio playing device is made to produce video-audio signal according to each golden key; And a host verifying unit, host verifying unit includes host key chip, wherein host key chip and display device are verified, to produce main frame gold key, and make display device receive according to main frame gold key the video-audio signal that each video-audio playing device provides; Time wherein in the audio-visual source that display device receives, for each video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving the passback of each display authentication unit keeps broadcast state after replying.
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 display authentication unit, each display authentication unit includes a key chip, wherein each key chip is verified with corresponding each video-audio playing device, to produce a gold medal key respectively, and each video-audio playing device is made to produce video-audio signal according to each golden key, and plural host verifying unit, each host verifying unit includes a host key chip, wherein each host key chip is verified with corresponding each display device, to produce a main frame gold key, and make each display device receive according to each main frame gold key the video-audio signal that respectively this video-audio playing device provides, time wherein in the audio-visual source that each display device receives, for each video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving the passback of each display authentication unit keeps broadcast state after replying.
The present invention also provides a kind of control method, and described method can in order to control above-mentioned many switchings display control unit or matrix form display control unit.
In other words, the present invention switches display control unit for a kind of more, and be applicable to control display device and receive and provide audio-visual source by two or more video-audio playing device, wherein, this many switchings display control unit comprises:
Two or more display authentication unit, respectively this display authentication unit includes key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, to produce golden key respectively, and makes respectively this video-audio playing device produce video-audio signal according to each this golden key; And
Host verifying unit, this host verifying unit includes host key chip, wherein this host key chip and this display device are verified, to produce main frame gold key, and make this display device receive according to this main frame gold key the video-audio signal that respectively this video-audio playing device provides;
Wherein in this audio-visual source that this display device receives for each this video-audio playing device wherein one provide time, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
Switch display control unit of the present invention more, wherein also comprise:
Processing unit, produces display and control data, and these display and control data have the display capabilities controlling this display device;
Link block, in order to connect this display device, and transmits this audio-visual source to this display device;
Video control unit, couple these display authentication unit, this host verifying unit, this link block and this processing units, this video control unit accept this processing unit control and choose these video-audio playing devices that main frame linkage unit connects wherein one, and these audio-visual sources are outputted to this display device via this link block; And
Operation interface, is connected to this processing unit, produces operational order, and transmit this operational order to this processing unit in order to acceptance operation;
Wherein, this processing unit controls this video control unit according to this operational order and switches, or controls the content changing these display and control data.
Switch display control unit 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.
Switch display control unit 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, be applicable to control plural display device and receive and provide audio-visual source by plural video-audio playing device, wherein, this matrix form display control unit comprises:
Plural display authentication unit, respectively this display authentication unit includes key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, to produce golden key respectively, and makes respectively this video-audio playing device produce video-audio signal according to each this golden key; And
Plural host verifying unit, respectively this host verifying unit includes host key chip, wherein respectively this host key chip is verified with corresponding respectively this display device, to produce main frame gold key, and each this display device is made to receive according to each golden key of this main frame the video-audio signal that respectively this video-audio playing device provides;
Wherein in this audio-visual source that each this display device receives for each this video-audio playing device wherein one provide time, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
Matrix form display control unit of the present invention, wherein this many switchings display control unit accepts user's operation to select any one video-audio playing device to play this video-audio signal.
According to a control method for matrix form display control unit of the present invention, wherein, this control method includes the following step:
When respectively this display authentication unit receives the checking request of corresponding respectively this video-audio playing device, verified with corresponding respectively this video-audio playing device by this key chip in each this display authentication unit, to produce this golden key, respectively this video-audio playing device is made to produce video-audio signal according to this golden key of correspondence;
When respectively this host verifying unit receives the checking request of corresponding respectively this display device, verified with corresponding respectively this display device by this host key chip in each this host verifying unit, to produce this main frame gold key, respectively this display device is made to receive video-audio signal according to this main frame gold key; And
Time wherein in this audio-visual source that each this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
The control method of a kind of display control unit of the present invention, in order to control the audio-visual source that at least one display device receives, described audio-visual source provided by plural video-audio playing device, this display control unit comprises at least two or more display authentication unit and at least one host verifying unit, wherein, this control method includes the following step:
When respectively this display authentication unit receives the checking request of corresponding respectively this video-audio playing device, verified with corresponding respectively this video-audio playing device by the key chip in each this display authentication unit, to produce golden key respectively, respectively this video-audio playing device is made to produce video-audio signal according to this golden key of correspondence;
When described at least one host verifying unit receives the checking request of this display device, verified with this corresponding display device respectively by the host key chip in this host verifying unit, to produce main frame gold key, this display device is made to receive video-audio signal according to this corresponding main frame gold key; And
Time wherein in this audio-visual source that each this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
In sum, the present invention arranges many group keys chip in switch in display control unit and matrix form display control unit more, be supplied to each video-audio playing device respectively and display device carries out required checking, and in time carrying out the switching action in different audio-visual source, make that the video-audio playing device of rear switching is still sustainable to be verified, avoid occurring to re-start checking and the problem play because checking interrupts, again promote convenience and the dirigibility of use with this.
Further understand feature of the present invention and technology contents for enable, please refer to following detailed description for the present invention and accompanying drawing, but institute's accompanying drawings is only to provide with reference to the use with explanation, being not used for being limited the present invention.
Accompanying drawing explanation
Fig. 1 is the system block diagram of the present invention's many switchings display control unit embodiment.
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 first link block
114b second link block
116 first display linkage units
118 second display linkage units
120 first display authentication units
120a first key chip
122 second display authentication units
122a second key chip
124 first host verifying unit
124a first host key chip
126 second host verifying unit
126a 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 display linkage units
406 main frame linkage units
410 power switches
412 buttons
44 display device
The explanation of S1 ~ S5 flow chart step
Embodiment
(many switching display control unit embodiments)
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, second main frame linkage unit 101, first display authentication unit 120, second and shows authentication unit 122, video control unit 104, first host verifying unit 124 and link block 114.
Many switchings display control unit 10 is connected with the first video-audio playing device 11 by the first main frame linkage unit 100.Many switchings display control unit 10 is connected with the second video-audio playing device 12 by the second main frame linkage unit 101.The connection line of the first described main frame linkage unit 100, second main frame linkage unit 101 directly and between video control unit 104 can in order to transmitting image signal.The first described 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 (as blue light player, DVD or VCD) etc. meet HDCP technology.Many switchings display control unit 10 is connected with display device 14 by link block 114, and display device 14 then can be equipment such as image output such as negative electrode iconoscope (CRT) screen or LCD screen etc.Described link block 114 includes the first display 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 outside switching display control unit 10 more.In preferred embodiment, also processing unit 108 and operation interface 112 can be arranged at the inside switching display control unit 10 more, and processing unit 108 can show that authentication unit 120, second shows authentication unit 122, video control unit 104, first host verifying unit 124 is connected respectively with described first, to carry out the signal transacting of being correlated with or to transmit operation.
Video control unit 104 shows authentication unit 120, second respectively and shows authentication unit 122 and be connected with first.Video control unit 104 can be video and switches integrated circuit (video switch IC), in order to receive the video data that the first video-audio playing device 11 or the second video-audio playing device 12 transmit, and the control according to processing unit 108 switches between the first main frame linkage unit 100 and the second main computer unit 101, thus choose the first video-audio playing device 11 or the second video-audio playing device 12, thus the audio-visual source that the first video-audio playing device 11 or the second video-audio playing device 12 provide is outputted to display device 14 by link block 114, perform the display of video and the broadcasting of audio frequency.
Processing unit 108 with switch display control unit 10 more and be connected.Processing unit 108 can produce display and control data, the display capabilities of described display and control Data Control display device 14.Described display and control data comprise display parameter data, color parameter data, renewal frequency supplemental characteristic, audio frequency parameter data, stereo display supplemental characteristic or network parametric data.
Processing unit 108 can be central processing unit, microprocessor or flush bonding processor etc. other there is timer (Timer), counter, random access memory (Random Access Memory, RAM), ROM (read-only memory) (Read Only Memory, ROM), central processing unit (Central Process Unit, CPU), accumulator (Accumulator), analog-to-digital device, numeral turns simulator (Digital-to-Analog Converter, DAC), and/or I/O (Input/Output, I/O) processor of interface.
Operation interface 112 is connected with processing unit 108.Operation interface 112 can be one or more button or button, screen display (On Screen Display, OSD) interface, OSB interface or infrared ray (IR) communication interface.Operation interface 112 can produce operational order in order to accept the operation of user and be sent to processing unit 108, processing unit 108 and then the instruction according to operational order, control video control unit 104 and be switched to the first main frame linkage unit 100 or the second main frame linkage unit 101.
For example, operation interface 112 can comprise two buttons, each button corresponds to a main frame linkage unit, when user presses one of them button, the button be pressed outputs signal to processing unit 108, after processing unit 108 judges the button that is pressed and corresponding main frame linkage unit according to the source of signal, video control unit 104 can be controlled and be switched to described respective hosts linkage unit, the audio-visual source that first video-audio playing device 11 or the second video-audio playing device 12 are provided outputs to corresponding display device 14 by the first described main computer unit 100 or the second main frame linkage unit 101.
Therefore, user can see in display device 14 video image that first video-audio playing device 11 or the second video-audio playing device 12 export, and hears the sound that the first video-audio playing device 11 or the second video-audio playing device 12 export.In other words, what user carried out the first video-audio playing device 11 or the second video-audio playing device 12 by operation interface 112 chooses operation.
In other embodiments, operation interface 112 can be infrared communication interface, such as, be infrared receiver module, the operational order produced in order to receiving infrared-ray signal.User can utilize the remote controls such as telepilot to send instruction to display control unit 10, also many switching display control units 10 can be made to be switched to the first video-audio playing device 11 or the second video-audio playing device 12 indicated by user according to operational order, and in display device 14, to show corresponding video data.
In the middle of another embodiment, operation interface 112 is except can being used for producing the operational order of appointment first video-audio playing device 11 or the second video-audio playing device 12, also can adjust or revise the display and control data be temporary in storage unit (not shown) by instruction processing unit 108, change video data with this and to output to shown by display device 14 result out.
For screen display (OSD) interface as operation interface 112, the menu that user can utilize screen display interface to provide, the project in menu chosen by collocation telepilot, and the parameter of change setting, such as change the resolution of display device 14 originally setting, choose different audio sound number of channels, change level or vertical synchronizing frequency, startup or close three-dimensional display function, or start or close network on-line function etc.
After processing unit 108 receives the operational order of one or more change display and control data above-mentioned, the parameter of corresponding amendment record display and control data in the memory unit.Thus, display and control data updated in the first video-audio playing device 11 or the second video-audio playing device 12 reading cells (not shown), and produce the video image corresponding to user's demand.
Link block 114 is connected with the first host verifying unit 124, video control unit 104, and the connection line wherein between link block 114 and video control unit 104 can in order to transmitting image signal.Link block 114 can be other display interface specifications such as digital visual interface (DVI) module, high resolution multimedia interface (HDMI) module or digital display port (Display Port, DP) interface module.In addition, link block 114 can be the connection slot (socket) corresponding to described interface module, has the attachment plug of same-interface and be electrically connected on display device 14 in order to correspondence connection.
First display authentication unit 120 is connected with the first main frame linkage unit 100.First display authentication unit 120 includes the first key chip 120a.First key chip 120a in order to verify with the first video-audio playing device 11, to produce the first gold medal key.First video-audio playing device 11 produces the first video-audio signal according to the first gold medal key, and as the first audio-visual source.
In other words, just the first authentication information can be produced when the first video-audio playing device 11 starts, being used for requirement verifies, now, first display authentication unit 120 just can be verified with the first video-audio playing device 11, and after being proved to be successful, the first video-audio playing device 11 just smooth broadcasting produces corresponding video-audio signal, using as the described first audio-visual source.
In addition, first display authentication unit 120 can be such as be made up of Video processing integrated circuit (IC), and the first described key chip 120a can be integrated in the first display authentication unit 120, or be independently arranged in storage unit (not shown).
Second display authentication unit 122 is connected with the second main frame linkage unit 101.Second display authentication unit 122 includes the second key chip 122a.Second key chip 112a in order to verify with the second video-audio playing device 12, to produce the second gold medal key.Second video-audio playing device 12 produces the second video-audio signal according to the second gold medal key, and as the second audio-visual source.
In other words, just the second authentication information can be produced when the second video-audio playing device 12 starts, being used for requirement verifies, now, second display authentication unit 122 just can be verified with the second video-audio playing device 12, and after being proved to be successful, the second video-audio playing device 12 just smooth broadcasting produces corresponding video-audio signal, using as the described second audio-visual source.Same, second display authentication unit 122 can be such as be made up of Video processing integrated circuit (IC), and the second described key chip 122a can be integrated in the second display authentication unit 122, or be independently arranged in storage unit (not shown).
In addition, explain for two video-audio playing devices in first embodiment, and be not used to the number of connection limiting video-audio playing device, if when video-audio playing device is plural quantity, then need the corresponding quantity increasing display authentication unit, when carrying out the switching of audio-visual source to make each video-audio playing device by many switching display control units 10, can broadcast state be kept and not interrupt.
First host verifying unit 124 is connected with video control unit 124.First host verifying unit 124 includes the first host key chip 124a.First host key chip 124a in order to verify with display device 14, with produce 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 verifying unit 124 is main in order to carry out proving program with display device 14.Described proving program can same or similar proving program between the first display authentication unit 120 and the first main frame linkage unit 100.
In addition, according to the magnitude setting of display device 14, may correspond to the magnitude setting increasing or reduce by the first main authentication unit 124.Same, first host verifying unit 124 can be such as be made up of Video processing integrated circuit (IC), and the first described host key chip 124a can be integrated in the first host verifying unit 124, or be independently arranged in 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 to be connected with the first display device 16 with the first host verifying unit 124 and the first link block 114a and to be connected with the second display device 18 with the second host verifying unit 126 and the second link block 114b.Wherein, the second main frame card unit 126 comprises the second host key chip 126a, and the second link block 114b comprises the second display linkage unit 118.Second host key chip 126a and the second display device 18 are connected to the second display 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).
Second host verifying unit 126 is connected with video control unit 124.Second host verifying unit 126 includes the second host key chip 126a.Second host verifying unit 126 is connected with the second display device 18 by the second link block 114b.Second host key chip 126a in order to verify with the second display device 18, with produce second main frame gold key.The second described 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 verifying unit 126 is main in order to verify with the second display device 18.
Same, second host verifying unit 126 can be such as be made up of Video processing integrated circuit (IC), and the second described host key chip 126a can be integrated in the second host verifying unit 126, or be independently arranged in storage unit (not shown).In addition, the first host verifying unit 124 is connected with the first display device 16 by the first link block 114a.First host key chip 124a, in order to verify with the first display device 16, to produce the first main frame gold key, and the process of follow-up video-audio signal and transmittance process and illustrated in the first embodiment, repeats no more in this.
Processing unit 108 can accept operation interface 112 according to operating the operational order that produces, so learn be selected to receive the first display device 16 or the second display device 18 that audio-visual source presented.Therefore, video control unit 104 can be subject to processing unit 108 and the control of operation interface 112, determines respectively to export the first display device 16 or the second display device 18 to by the first video-audio playing device 11 or the second video-audio playing device 12.
In addition, explain for two video-audio playing devices in second embodiment, and be not used to the number of connection limiting video-audio playing device, if when video-audio playing device is plural quantity, then need the corresponding quantity increasing display authentication unit, when carrying out the switching of audio-visual source to make each video-audio playing device by matrix form display control unit 10a, can broadcast state be kept and not interrupt, time wherein in the audio-visual source that each display device receives, for each video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving the passback of each display authentication unit keeps broadcast state after replying.Same, explain for two display device in the second embodiment, and be not used to the number of connection limiting display device, 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, many switchings display control unit 40 comprises link block 400, described link block 400 also comprises multiple display linkage unit 402 being arranged on surface of shell, each display linkage unit 402 can be a connection slot, in order to connect display device 44 one to one via the screen connecting line with attachment plug.
Except the display linkage unit 402 in order to connect 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 main frame connecting line.
In addition, the display control unit 40 that switches also can comprise controlling the power switch 410 that display control unit 40 opens or cut out more, and multiple button 412 (operation interface 112 corresponding to Fig. 1 to Fig. 2).Described multiple operation push-buttons 412 correspond to multiple display linkage unit 402 respectively one to one, and user directly can press the particular host linkage unit 406 that wherein any one operation push-button 412 will be chosen with appointment.
(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 corresponding to the many switchings display control unit described in Fig. 1, also can be corresponding to the matrix form display control unit described in Fig. 2.For ease of understanding, the present embodiment illustrates for the many switchings display control unit shown in Fig. 1, please with reference to Fig. 1.First, in S1 step, the first video-audio playing device 11 sends checking request and verifies to the first display authentication unit 120, and produces the first video-audio signal after completing checking.In particular, when the first display authentication unit 120 receives the checking request of the first video-audio playing device 11, verified by the first key chip 120a in the first display authentication unit 120 and the first video-audio playing device 11, to produce the first gold medal key, the first video-audio playing device 11 is made to produce the first video-audio signal according to the first gold medal key.
In S2 step, the second video-audio playing device 12 sends checking request and verifies to the second display authentication unit 122, and produces the second video-audio signal after completing checking.In particular, when the second display authentication unit 122 receives the checking request of the second video-audio playing device 12, by second display authentication unit in 122 the second key chip 122a and the second video-audio playing device 12 verify, to produce the second gold medal key, the second video-audio playing device 12 is made to produce the second video-audio signal according to the second gold medal key.In addition, above-mentioned S1 step and S2 step can be carries out simultaneously, or S1 step is prior to S2 step, or S2 step is prior to S1 step.
Next, in S3 step, the operation that display control unit receives user is the first video-audio signal or the second video-audio signal with the audio-visual source controlling display device 14 and receive.
In S4 step, when the audio-visual source that display device 14 receives is the first video-audio signal, first video-audio playing device 11 sends checking request to display device 14, and the checking that receiving and displaying device 14 returns is replied, broadcast state is kept to make the first video-audio playing device 11, wherein the first host verifying 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 return described checking reply by display device 14.Now, the second video-audio playing device 12 sends checking request to the second display authentication unit 122, and the checking receiving the second display authentication unit 122 passback is replied, and keeps broadcast state to make the second video-audio playing device 12.
In S5 step, when the audio-visual source that display device 14 receives is the second video-audio signal, second video-audio playing device 12 sends checking request to display device 14, and the checking that receiving and displaying device 14 returns is replied, broadcast state is kept to make the second video-audio playing device 12, wherein the first host verifying 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 return described checking reply by display device 14.Now, the first video-audio playing device 12 sends checking request to the first display authentication unit 120, and the checking receiving the first display authentication unit 120 passback is replied, and keeps broadcast state to make the first video-audio playing device 11.
In addition, as the matrix form display control unit (as shown in Figure 2) of the embodiment of the present invention, if when the quantity of video-audio playing device increases, then be designated and provide the direct display authentication unit corresponding with it of the video-audio playing device in audio-visual source to verify, to keep broadcast state, all the other video-audio playing devices not being designated audio-visual source are then verified with each self-corresponding display authentication unit, to keep broadcast state.In other words, time wherein in the audio-visual source that each display device (the first display device 16 and/or the second display device 18 as shown in Figure 2) receives, for each video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving the passback of each display authentication unit keeps broadcast state after replying, the rest may be inferred.
In addition, though the embodiment corresponding to Fig. 4 illustrates for a display device, but as matrix form display control unit except the first display device 16, also connect the second display device 18 time, corresponding to the second host verifying unit 126 of the second display device 18 and the running of the second host key chip 126a, the above-mentioned explanation about host verifying unit 124 and the first host key chip 124a also can be analogized.
(possible effect of embodiment)
In sum, the present invention arranges many group keys chip in many switchings, matrix form display control unit, be supplied to each video-audio playing device respectively and display device carries out required checking, and when carrying out the switching action in different audio-visual source, make that the video-audio playing device of rear switching is still sustainable to be verified, avoid occurring to re-start checking and the problem play because checking interrupts, again promote convenience and the dirigibility of use with this.
Although embodiment disclosed by the invention is described above, these embodiments are only the use of illustrated example explanation, and should not be interpreted as restriction of the invention process.Not departing from essential scope of the present invention, other change or change, all belong to protection scope of the present invention.
Claims (8)
1., switch a display control unit more, be applicable to a control display device receive and the audio-visual source provided by two or more video-audio playing device, it is characterized in that, this many switchings display control unit comprises:
Two or more display authentication unit, respectively this display authentication unit includes key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, to produce golden key respectively, and makes respectively this video-audio playing device produce video-audio signal according to each this golden key; And
Host verifying unit, this host verifying unit includes host key chip, wherein this host key chip and this display device are verified, to produce main frame gold key, and make this display device receive according to this main frame gold key the video-audio signal that respectively this video-audio playing device provides;
Time wherein in this audio-visual source that this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
2. according to claim 1 switch display control unit more, it is characterized in that, also comprise:
Processing unit, produces display and control data, and these display and control data have the display capabilities controlling this display device;
Link block, in order to connect this display device, and transmits this audio-visual source to this display device;
Video control unit, couple these display authentication unit, this host verifying unit, this link block and this processing units, this video control unit accept this processing unit control and choose these video-audio playing devices that main frame linkage unit connects one of them, and these audio-visual sources are outputted to this display device via this link block; And
Operation interface, is connected to this processing unit, produces operational order, and transmit this operational order to this processing unit in order to acceptance operation;
Wherein, this processing unit controls this video control unit according to this operational order and switches, or controls the content changing these display and control data.
3. according to claim 2ly switch display control unit, it 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. according to claim 2ly switch display control unit, it is characterized in that, this operation interface is change-over switch, button, screen display interface or infrared communication interface more.
5. a matrix form display control unit, be applicable to control plural display device receive and the audio-visual source provided by plural video-audio playing device, it is characterized in that, this matrix form display control unit comprises:
Plural display authentication unit, respectively this display authentication unit includes key chip, wherein respectively this key chip is verified with corresponding respectively this video-audio playing device, to produce golden key respectively, and makes respectively this video-audio playing device produce video-audio signal according to each this golden key; And
Plural host verifying unit, respectively this host verifying unit includes host key chip, wherein respectively this host key chip is verified with corresponding respectively this display device, to produce main frame gold key, and each this display device is made to receive according to each golden key of this main frame the video-audio signal that respectively this video-audio playing device provides;
Time wherein in this audio-visual source that each this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
6. matrix form display control unit according to claim 5, is characterized in that, this matrix form display control unit accepts user's operation to select any one video-audio playing device to play this video-audio signal.
7. a control method for matrix form display control unit according to claim 5, is characterized in that, this control method includes the following step:
When respectively this display authentication unit receives the checking request of corresponding respectively this video-audio playing device, verified with corresponding respectively this video-audio playing device by this key chip in each this display authentication unit, to produce this golden key, respectively this video-audio playing device is made to produce video-audio signal according to this golden key of correspondence;
When respectively this host verifying unit receives the checking request of corresponding respectively this display device, verified with corresponding respectively this display device by this host key chip in each this host verifying unit, to produce this main frame gold key, respectively this display device is made to receive video-audio signal according to this main frame gold key; And
Time wherein in this audio-visual source that each this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
8. the control method of a display control unit, in order to control the audio-visual source that at least one display device receives, described audio-visual source provided by plural video-audio playing device, this display control unit comprises at least two or more display authentication unit and at least one host verifying unit, it is characterized in that, this control method includes the following step:
When respectively this display authentication unit receives the checking request of corresponding respectively this video-audio playing device, verified with corresponding respectively this video-audio playing device by the key chip in each this display authentication unit, to produce golden key respectively, respectively this video-audio playing device is made to produce video-audio signal according to this golden key of correspondence;
When described at least one host verifying unit receives the checking request of this display device, verified with this corresponding display device respectively by the host key chip in this host verifying unit, to produce main frame gold key, this display device is made to receive video-audio signal according to this corresponding main frame gold key; And
Time wherein in this audio-visual source that each this display device receives, for each this video-audio playing device, one of them provides, all the other video-audio playing devices send checking request respectively to corresponding display authentication unit, and the checking receiving respectively this display authentication unit passback keeps broadcast state after replying.
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