CN112637536B - Multimedia control card and identification method thereof and image array device - Google Patents
Multimedia control card and identification method thereof and image array device Download PDFInfo
- Publication number
- CN112637536B CN112637536B CN201911228005.9A CN201911228005A CN112637536B CN 112637536 B CN112637536 B CN 112637536B CN 201911228005 A CN201911228005 A CN 201911228005A CN 112637536 B CN112637536 B CN 112637536B
- Authority
- CN
- China
- Prior art keywords
- signal
- multimedia
- control card
- level
- multimedia interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000004044 response Effects 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims description 11
- 238000012905 input function Methods 0.000 claims description 8
- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical group C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 description 16
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controls And Circuits For Display Device (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a multimedia control card and a recognition method thereof, wherein a control signal is changed from a first level to a second level by driving a switcher circuit, and then the control signal is output by a multimedia interface. Then, the multimedia interface is used to receive the first response signal, and the first response signal corresponds to the control signal. And finally, identifying the connection state of the multimedia interface according to the first response signal. In one embodiment, the multimedia control card and the identification method can be applied to a switcher, for example: an image array device.
Description
[ Field of technology ]
The present invention relates to a multimedia input or output device identification technology, and more particularly to a multimedia control card, an identification method thereof and an image array device capable of automatically identifying a multimedia input device or an output device and providing a misconnection message to prompt a user.
[ Background Art ]
Referring to fig. 1A and 1B, a schematic diagram of a multi-port (port) multimedia switching device according to the prior art is shown. The prior art multimedia switching apparatus generally has a plurality of input ports and a plurality of output ports, wherein each input port is used for coupling with a multimedia signal input device (such as a DVD player or a computer, etc.), and each output port is used for coupling with a multimedia signal output device (such as a flat panel display or a projector).
In general, this type of multi-port multimedia switching device has each port interface predefined as an input port or an output port at design time. For example: the upper row of interfaces in fig. 1A is defined as an input port 100, and the lower row of interfaces in fig. 1A is defined as an output port 101; alternatively, the left half of the interfaces in fig. 1B are defined as output ports 102, and the right half of the interfaces in fig. 1B are defined as input ports 103.
As shown in fig. 2, the HDMI transmission protocol is shown. When the multimedia signal input device (e.g., computer or DVD player) is connected with the multimedia signal output device (e.g., display device such as TV and projector), the multimedia signal input device sends Vcc signal of 5V to the multimedia signal output device according to HDMI communication protocol, then the multimedia signal output device adjusts the signal level of the Hot Plug Detection (HPD) channel to HIGH (HIGH) level, and then the multimedia signal input device requests EDID information from the multimedia signal output device via the display information channel (DISPLAY DATA CHANNEL, DDC). After the multimedia signal output device replies the EDID information of the multimedia signal input device, the multimedia signal input device outputs TMDS signals to the multimedia signal output device through a TMDS channel, so that corresponding images and audios are displayed.
In the above HDMI transmission protocol, there is no mechanism for the user to identify whether there is a wrong multimedia signal input or output device, so in the use of the multi-port (port) multimedia switching device, if the multimedia signal input device or output device is connected to the opposite port, that is, the multimedia signal output device is connected to the input port or the multimedia signal input device is connected to the output port, the user cannot know in real time at the first time point. Therefore, when a multi-port (port) multimedia switching apparatus connects a very multimedia signal input device and a multimedia signal output device, and a problem of connection to the opposite port occurs, a user often needs to spend a lot of time to clear whether each port has a problem of erroneous connection.
In view of the foregoing, there is a need for a multimedia control card, an identification method thereof, and an image array device for solving the problems of the prior art.
[ Invention ]
The invention provides a multimedia control card, an identification method thereof and an image array device, which can detect the response of an external device to judge whether the external device is connected correctly or incorrectly or not or the connection state is not achieved, reduce the time required by users for debugging and correcting the connection error, and improve the use convenience.
In one embodiment, the present invention provides a method for identifying a multimedia control card, which includes the steps of first driving a control signal to change from a first level (level) to a second level with a switch circuit. Then, the control signal is outputted by the multimedia interface. Then, the first response signal is detected by the multimedia interface, and the first response signal corresponds to the control signal. And finally, identifying the connection state of the multimedia interface according to the first response signal.
In another embodiment, the present invention provides a multimedia control card having a signal receiving function or a signal outputting function, the multimedia control card including a multimedia interface, a switch circuit and a controller. The switch circuit is connected with the multimedia interface, drives the control signal to change from the first level to the second level, and outputs the control signal through the multimedia interface. The switch circuit receives a first response signal received from the multimedia interface. The first response signal is a control signal corresponding to the second level. The controller is connected with the switcher circuit and recognizes the connection state of the multimedia interface according to the first response signal.
In another embodiment, the present invention provides an image array device, which includes a switching unit and at least one multimedia control card. At least one multimedia control card electrically connected with the switching unit, wherein each multimedia control card comprises a multimedia interface, a switcher circuit and a controller. The switch circuit is connected with the multimedia interface, changes the control signal from the first level to the second level, outputs the control signal through the multimedia interface, and receives a first response signal received by the multimedia interface, wherein the first response signal corresponds to the control signal. And the controller is connected with the switcher circuit and recognizes the connection state of the multimedia interface according to the first response signal.
In one embodiment, the present invention uses Hot Plug Detect (HPD) as a control signal, breaks through the conventional manner, and enables a control card belonging to the multimedia signal input to generate the HPD signal, and uses the communication protocol of the control card port to use signals in a specific channel, for example: signals in the data channels (DISPLAY DATA CHANNEL, DDC) and differential signal channels (TMDS) are displayed to determine the status of the control card connection. Therefore, the use of additional elements or circuits can be reduced, and the effect of judging whether the connection is wrong can be achieved.
The specific technology adopted by the present invention will be further described by the following examples and attached drawings.
[ Description of the drawings ]
Fig. 1A and 1B are schematic diagrams of a multi-port (port) multimedia switching device in the prior art.
Fig. 2 is a schematic diagram of an HDMI transmission protocol.
Fig. 3A is a schematic diagram of an embodiment of a multimedia control card according to the present invention.
Fig. 3B is a schematic diagram of a switch circuit according to an embodiment of the invention.
Fig. 4 is a flowchart of a method for identifying a multimedia control card according to an embodiment of the invention.
Fig. 5 is a schematic diagram of another embodiment of the multimedia control card of the present invention.
Fig. 6 is a flowchart illustrating an embodiment of identifying a connection status of a first multimedia interface according to the present invention.
Fig. 7 is a schematic diagram of a switch circuit according to an embodiment of the invention.
FIG. 8 is a schematic diagram of an image array device according to an embodiment of the invention.
Description of main reference numerals:
2.2 a-a multimedia control card; 20-a first multimedia interface; 21-a second multimedia interface; 22-a switcher circuit; 220-a switching circuit; 221-a detection circuit; 222-controlling the switching element; 222a, 222 b-tangential point positions; 23-a controller; a 24-comparator; 25-mode switcher; a 40-array switcher; 90-signal lines; 91-application means; 91a, 91 d-multimedia signal output means; 91b, 91 c-a multimedia signal input source; 92-a first level signal; 3-method; 30-35-step; 350-359-step; 4-image array means; a 40-array switcher; 41. 42-a computer; 43-network.
[ Detailed description ] of the invention
Various exemplary embodiments may be more fully described below with reference to the accompanying drawings, in which some exemplary embodiments are shown. This inventive concept may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. Like numbers refer to like elements throughout. The following embodiments are described with reference to the drawings, but the following embodiments are not intended to limit the invention.
Referring to fig. 3A, an embodiment of a multimedia control card according to the present invention is shown. In this embodiment, the multimedia control card 2 is made into an adapter card structure, which has a first multimedia interface 20 and a second multimedia interface 21. The first multimedia interface 20 may be HDMI, DVI, or DisplayPort, and is configured to be electrically connected to the application device 91. In the present embodiment, the first multimedia interface 20 is electrically connected to the application device 91 via the signal line 90. The second multimedia interface 21 may be connected to a switching device, such as a contact switch (crosspoint switch) in an array switch, by way of a flat cable or other signal transmission medium, but is not limited thereto. It should be noted that, in an embodiment, the port type of the first multimedia interface 20 conforms to the port type specified by HDMI, DVI, or DisplayPort communication protocol; the port type of the second multimedia interface 21 may be encapsulated data (PACKET DATA) formed by the user's own encoding/decoding, in addition to the manner conforming to various communication protocols as described above. It should be noted that the type of the port may be determined according to the needs of the user, and is not limited.
In one embodiment, the application device 91 may be a multimedia signal input source, for example: computer, player, etc. Alternatively, in another embodiment, the application device 91 may be a multimedia signal output device, for example: liquid crystal displays, light emitting diode displays, projectors, and other display devices.
The multimedia control card 2 also has a switch circuit 22 and a controller 23. The switch circuit 22 is electrically connected to the first multimedia interface 20 and the controller 23. Fig. 3B is a schematic diagram of a switch circuit according to an embodiment of the invention. The switch circuit 22 includes a switch circuit 220 and a detection circuit 221. The switch circuit 220 is used for receiving an input signal and converting the input signal into a corresponding switch signal. In one embodiment, the input signal may be a signal indicative of a data channel signal (DDC), and the switch signal may be a voltage level signal, which in one embodiment is a TTL voltage level. After receiving the switch signal, the detection circuit 221 determines the level of the switch signal, and inputs the first signal level to the controller 23. In one embodiment, the switch circuit 22 may be a voltage monitor (voltage monitor), such as a texas instruments factory TPS3823, the operation of which will be described in detail below. The multimedia control card 2 further has a comparator 24, and the comparator 24 can receive the signal returned from the application device 91, determine the level thereof, and then return the determined result to the controller 23.
Referring to fig. 3A-3B and fig. 4, fig. 4 is a schematic diagram of a method for identifying a multimedia control card according to the present invention. Generally, in one embodiment, the multimedia control card 2 may be a control card for fixedly receiving a multimedia signal input source or a control card for fixedly outputting a multimedia signal to a multimedia signal output device, as shown in fig. 3A. In another embodiment, as shown in fig. 5, the multimedia control card may be a control card 2a having both the foregoing two functions, and the terminal sets the card as an input control card or an output control card by a user. In any of the above control cards, the user may not pay attention to the control card, and may connect an improper device to the multimedia control card. For example: the application device belonging to the image source is connected to the control card belonging to the multimedia signal output, or the application device belonging to the display is connected to the control card belonging to the multimedia signal input. It should be noted that, in the embodiment of the control card of fig. 5, there is a mode switch 25 inside the multimedia control card 2a of this type, and the controller 23 may be configured by hardware or by software, so as to change the operation mode of the control card, for example: the control card is set as a control card with signal input or a control card with signal output. In order to automatically determine whether the user has a misconnection, the method of the embodiment of fig. 4 can determine whether the application device 91 connected to the multimedia control card 2 or 2a is a multimedia signal input source or a multimedia signal output device, so as to avoid misconnection.
In step 30 of the method 3 of fig. 4, the user connects the application device to the multimedia control card 2 at will, it is to be noted that the user does not need to deliberately distinguish whether the application device is a multimedia signal input source or a multimedia signal output device, but connects the application device 91 to the multimedia control card 2 at will. Next, in step 31, the driving switch circuit 22 changes the control signal from the first level to the second level, and outputs the control signal to the application device 91 via the first multimedia interface 20. In one embodiment of this step, the control signal is a Hot Plug Detect (HPD) signal, which is generated by the controller 23, but is not limited thereto. The HPD signal has two levels, a first level being a LOW Level (LOW) and a second level being a HIGH level (HIGH). In one embodiment, the control signal has a low level when entering the switch circuit 22, and the switch circuit 22 modulates the low level to a high level state, and then transmits the low level to the application device 91 via the first multimedia interface 20 and the signal line 90. In another embodiment, the controller 23 may directly generate the high-level control signal and transmit the high-level control signal to the application device 91 via the first multimedia interface 20 and the signal line 90.
Note that, the pins of the first multimedia interface 20 for transmitting the HPD signal may be different depending on the type of interface, and the 19 th pin is the pin for transmitting the HPD signal if the HDMI signal is used, the 16 th pin is the pin for transmitting the HPD signal if the DVI signal is used, and the 18 th pin is the pin for transmitting the HPD signal if the DisplayPort signal is used. It should be noted that signals corresponding to pins of various signal protocols are well known to those skilled in the art, and are not described herein.
In one embodiment of changing the signal level in step 31, as shown in fig. 3A, the controller 23 generates the switching signal CTRL1 to the switch circuit 22, so that the power Vcc, the resistor R and the switch control switching element 222 are included therein and switched to the position 222a, so that Vcc pulls the control signal to the second level (HIGH), and when the switching signal CTRL1 switches the control switching element 222 to the position 222b, the control signal returns to the first Level (LOW). The above embodiments can change the level of the control signal. It should be noted that the manner of controlling the level of the level control can be changed by those skilled in the art according to the prior art and knowledge thereof, and the present invention is not limited to the embodiment.
After the control signal is pulled to the second level (HIGH), step 32 transmits the control signal at the second level to the application device 91 via the first multimedia interface 20 and the transmission line 90. Next, in step 33, after the application device 91 receives the control signal at the second level, the application device 91 generates a corresponding first response signal and returns the first response signal to the multimedia control card 2 via the signal line 90. In one embodiment, the first response signal is a signal indicative of a data channel signal (DDC). Generally, in the HDMI communication protocol, the 15 th pin is responsible for transmitting the DDC clock signal (DDC CLK or I2C serial clock signal), and the 16 th pin is responsible for transmitting the DDC data signal (DDC data or I2C serial data signal). In this embodiment, the first response signal may be selected as the frequency signal of the DDC.
In another embodiment, the 6 th pin is generally responsible for transmitting the DDC clock signal (DDC CLK) and the 7 th pin is generally responsible for transmitting the DDC data signal (DDC data) for DVI signals. In yet another embodiment, if a DisplayPort signal, the DDC frequency and data are transmitted over auxiliary channels (AUX) on pins 15 and 17. Therefore, although the present embodiment is mainly described with HDMI signals, DVI or DisplayPort, or even other standard signals, can be implemented according to the spirit.
Next, step 34 is performed, where the first multimedia interface 20 detects a first response signal corresponding to the control signal. Then, in step 35, the controller 23 determines the connection status of the first multimedia interface 20 according to the first response signal, wherein the connection status includes whether the first multimedia interface 20 is in an unconnected state, or whether the application device 91 connected to the first multimedia interface 20 belongs to a multimedia signal input source (or source), or a multimedia signal output device (or sink).
Referring to fig. 6, a flowchart of an embodiment of the invention for identifying a connection status of a first multimedia interface is shown. In this embodiment, referring to fig. 3A and 3B, first, in step 350, the switch circuit 22 receives the first response signal and converts the first response signal to the first signal level. In step 350, the signal processing and detection is performed mainly by the switch circuit 22 shown in fig. 3A and 3B. In the present embodiment, the switch circuit 22 includes a switch circuit 220 and a detection circuit 221. The switch circuit 220 is configured to generate a corresponding switch signal according to the first response signal, and the detection circuit is configured to detect whether the level of the switch signal is a HIGH level or a LOW level, and if the switch signal is a HIGH level, output a first level signal representing HIGH, otherwise output a first level signal representing LOW.
In one embodiment, the switch circuit 220 and the detection circuit 221 are integrated into a circuit element, such as: power supply voltage monitor, model number: TPS3823 is one example. As shown in fig. 7, the switch circuit and the detection circuit are integrated in a TPS3823 of a device, wherein the MR pin is electrically connected to the pin of the first response signal (e.g., DDC CLK signal), and the RST pin is electrically connected to the controller 23. The RST pin is used to output the first signal level. In one embodiment, when the MR Pin level is HIGH, i.e., when there is a DDC CLK signal, the RST level is HIGH; on the other hand, when LOW is present, i.e., when there is no DDC CLK signal, the RST level is LOW.
After step 350, step 351 is performed, in which the first signal level (HIGH or LOW) is transmitted to the controller 23, and the controller 23 determines whether the application device 91 connected to the first multimedia interface 20 belongs to a multimedia signal source (source) or a display device (sink) according to the first signal level, or whether the multimedia interface is in an unconnected state, that is, the multimedia signal source or the display device is not connected. In step 351, when the first level signal 92 received by the controller 23 is in the LOW state, it represents that the application device 91 connected to the first multimedia interface 20 is a multimedia signal input source (source terminal). The main reason is that, taking HDMI protocol as an example, when HPD signal is HIGH, if it is a multimedia signal output device (sink end), it is necessary to respond to the related display information via DDC channel, for example: EDID information. In one embodiment, according to the foregoing, the DDC CLK of the DDC channel is used as the first response information, so if the application device 91 is a multimedia signal output device, the first response signal will have the information of the DDC CLK, and the switch circuit 22 can output HIGH. On the other hand, if the state of the multimedia signal input source is not recovered, the output of the switch circuit 22 is in the LOW state. Based on the above communication protocol, the controller 23 can determine whether the connection state of the first multimedia interface 20 is connected to the multimedia signal input source according to the returned message.
When the first signal level of the first response signal received by the controller 23 is LOW, step 352 is performed, and the controller 23 determines that the signal is connected to the multimedia signal input source. Then, step 353 is performed to determine whether the multimedia interface 20 is connected by mistake according to the signal receiving function or the signal outputting function corresponding to the multimedia control card 2. As mentioned above, each of the multimedia control cards 2 may be a control card with a multimedia signal receiving function, and such a control card is used for electrically connecting with a multimedia signal input source; or a control card with a multimedia signal output function for electrically connecting with a multimedia signal output device such as a display device. In addition, there is a multimedia control card having a function capable of switching settings, and selecting a mode as a multimedia signal output function or an input function. Thus, the user can choose to switch either mode by hardware or software control.
In step 353, when the multimedia control card is in the input function mode, the application device connected thereto is a multimedia signal source device, for example: the computer is a DVD player, etc., that is, a multimedia control card representing the correct connection of the multimedia signal input source to the input function. On the contrary, if the multimedia control card is in the output function mode, the application device 91 connected thereto is a device of the multimedia signal input source, i.e. the multimedia control card representing the user to connect the multimedia signal input source to the output function by mistake, because the first signal level is LOW. In this case, the controller 23 performs the step of activating the alert 354 to issue a corresponding alert message, for example: sound, light, voice or text warning message.
Returning to step 351, when the first signal level of the first response signal received by the controller is HIGH, step 355 is performed to provide the voltage Vcc to the application device, so as to further determine whether the first multimedia interface 20 is connected to the multimedia signal output device or not. Taking HDMI communication specification as an example, voltage is supplied through 18 th pin. If the first multimedia interface 20 is an HDMI interface, the voltage of step 355 is provided to the application device 91 via the 18 th pin. If the first multimedia interface 20 is a DVI interface, a voltage is provided to the application device via pin 14. If the first multimedia interface 20 is DisplayPort, the voltage is supplied on the 20 th pin. After receiving the voltage signal, the application device 91 generates a corresponding second response signal, which in this embodiment is a TMDS signal. The TMDS signal is a TMDS clock (TMDS clock), so in one embodiment, the frequency signal in the TMDS signal may be used as the second response signal. It should be noted that the TMDS data signal (TMDS data) may also be implemented, and is not limited to the TMDS frequency signal.
Next, in step 356, the controller 23 in the multimedia control card 2 receives the second response signal generated by the application device 91 through the first multimedia interface 20, and determines. Referring to FIG. 3A, the TMDS CLK pin signal in the returned second response signal enters the comparator 24. The comparator 24 outputs a second signal level to the controller 23 according to the state of the TMDS CLK signal. Taking HDMI signal as an example, by the standard specification of HDMI, when the voltage signal VCC is applied to the application device, if the application device is a multimedia signal output device (or Sink), the TMDS level of the multimedia signal output device must be 3.3V. Therefore, the comparator 24 can determine the signal of the TMDS CLK pin, and generate the second level signal, that is, the result processed by the comparator 24, which is provided to the controller 23 to determine what kind of the currently connected application device 91 belongs to.
After step 356, step 357 is performed, where the controller 23 determines that the application device 91 electrically connected to the first multimedia interface 20 is a multimedia signal output device according to the second level signal outputted from the comparator 24, and when the level of the second level signal is HIGH, the second response signal is a TMDS CLK signal, so that step 358 is performed. Otherwise, when the level of the second level signal is LOW, it represents that there is no second response signal, so it is determined in step 359 that the first multimedia interface 20 is not connected to any device.
Either step 358 or step 359 is followed by returning to step 353 to determine if there is a misconnection. Taking step 358 to step 353 as an example, as described above, step 353 mainly depends on whether the multimedia control card 2 belongs to the multimedia signal receiving control card or the multimedia signal outputting control card. For example: when the multimedia control card 2 is in the output function mode, the application device 91 connected thereto is a multimedia signal output device, for example: a liquid crystal display, a plasma television, or a projection device or the like, that is, a multimedia control card representing a user to properly connect the multimedia signal output device to the output function. On the contrary, if the multimedia control card is in the input function mode, the second signal level is HIGH, and the application device connected with the second signal level is the multimedia signal output device, thus representing the user error of the multimedia control card connecting the multimedia signal output device to the input function. In this case, the controller 23 performs the step of activating the alert 354 to issue a corresponding alert message, for example: sound, light, voice or text warning message. Similarly, taking step 359 as an example, when the level of the second response signal received by the controller 23 is LOW, the controller 23 determines that the first multimedia interface 20 is in a state of not being connected to the application device 91, so that in step 353, the user is alerted to the fact that the multimedia signal interface 20 of the control card is not connected through the alert message.
Referring to fig. 8, a schematic diagram of an image array device according to an embodiment of the invention is shown. The image array device 4 includes an array switcher 40 and a plurality of multimedia control cards 2. The array switch 40 is a contact switch in an embodiment, and may be a matrix type contact combination, such as 4x4 (i.e. 4 input ports and 4 output ports), 16x16 (i.e. 16 input ports and 16 output ports), or 32x32 (i.e. 32 input ports and 32 output ports), where the number of contact combinations is not particularly limited in the present invention. Each of the multimedia control cards 2 may be a fixed signal source input control card or an output control card as shown in fig. 3A. Or the mode-switchable multimedia control card 2a as shown in fig. 5.
In one embodiment, the image array device 4 may be set or controlled by a proximal computer 41. In another embodiment, the image array device 4 can be set or controlled by a remote computer 42 via a network 43. The first multimedia interface 20 (which may be an HDMI, DVI or DisplayPort interface) of each multimedia control card 2 or 2a is electrically connected to a multimedia signal input source (e.g., a computer or a DVD player), and the first multimedia interface 20 may also be electrically connected to a multimedia signal output device (e.g., a television or a display device such as a projector). The multimedia control card 2 or 2a is electrically connected to the array switch 40 through the second multimedia interface 21, so that the array switch 4 can pair any one of the multimedia signal receiving control cards with any one of the multimedia signal outputting control cards through control pairing, so that the multimedia signal received by the multimedia signal receiving control card is transmitted to the control card as the multimedia signal outputting function through the array switch 40, and then outputted to the multimedia signal outputting device 91a or 91d.
Since the image array device 4 has a plurality of multimedia control cards 2 or 2a, and thus has a plurality of first multimedia interfaces 20 for connecting with the multimedia signal input source or the multimedia signal output device, the user may have a connection error. The image array device of the embodiment uses the multimedia control card of fig. 3A or fig. 5 and the processes shown in fig. 4 and fig. 6, so that when there is a fault, the user can be warned of the fault, and the user can carry out correction, thereby reducing the time required by the user to debug and correct the connection fault, and improving the use convenience.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the details of the shape, construction, features, methods and the number of the embodiments described in the claims can be modified somewhat without departing from the spirit and scope of the present invention.
Claims (14)
1. The identification method of the multimedia control card is characterized by comprising the following steps of:
the driving switch circuit changes the control signal from the first level to the second level;
Outputting the control signal by a multimedia interface;
receiving a first response signal by the multimedia interface, wherein the first response signal corresponds to the control signal; and
And identifying the connection state of the multimedia interface according to the first response signal, wherein the connection state is a state for identifying whether the multimedia interface is connected with a multimedia signal source, connected with display equipment or not connected.
2. The method for identifying a multimedia control card according to claim 1, wherein identifying the connection state of the multimedia interface according to the first response signal further comprises the steps of:
The switcher circuit receives the first response signal and converts the first response signal into a first signal level; and
And judging that the multimedia interface is connected to the multimedia signal source when the first signal level has a first state, and generating an alarm message when the multimedia control card is a multimedia control card with a signal output function.
3. The method for identifying a multimedia control card according to claim 1, wherein identifying the connection state of the multimedia interface according to the first response signal further comprises the steps of:
the switcher circuit receives the first response signal and converts the first response signal into a first signal level;
judging that when the first signal level has a second state, providing voltage by the multimedia interface;
Receiving a second response signal corresponding to the voltage; and
And judging whether the multimedia interface is connected to the display equipment or not according to the second response signal.
4. The method for recognizing a multimedia control card according to claim 3, wherein the judging of the connection state of the multimedia interface further comprises the steps of:
Receiving the second response signal to generate a second signal level;
Judging that the multimedia interface is in an unconnected state when the second signal level has a third state; and
And when the second signal level is judged to have a fourth state, identifying that the multimedia interface is connected to the display equipment, and generating an alarm message when the multimedia control card is a multimedia control card with a signal input function.
5. A multimedia control card having a signal receiving function or a signal outputting function, the multimedia control card comprising:
a multimedia interface;
The switch circuit is connected with the multimedia interface, changes a control signal from a first level to a second level, and outputs the control signal through the multimedia interface, and receives a first response signal received by the multimedia interface, wherein the first response signal corresponds to the control signal; and
And the controller is connected with the switcher circuit and recognizes the connection state of the multimedia interface according to the first response signal, wherein the connection state is a state for recognizing whether the multimedia interface is connected with a multimedia signal source, connected with display equipment or not connected.
6. The multimedia control card of claim 5, wherein the switch circuit converts the first response signal into a first signal level, and recognizes that the multimedia interface is connected to the multimedia signal source when the first signal level is determined to have a first state, wherein the multimedia control card issues an alert message when the multimedia control card is a multimedia control card with a signal output function.
7. The multimedia control card of claim 6, wherein the switcher circuit further comprises:
the switching circuit generates a corresponding switching signal according to the first response signal; and
The detection circuit receives the switch signal and generates the first signal level according to the switch signal.
8. The multimedia control card of claim 5, wherein the switch circuit receives the first response signal and converts the first response signal to a first signal level, and outputs a voltage through the multimedia interface when the first signal level has a second state.
9. The multimedia control card of claim 8, further comprising a comparator for receiving a second response signal corresponding to the voltage, identifying the multimedia interface as being in an unconnected state when the second signal level is determined to have a third state, and identifying the multimedia interface as being connected to the display device when the second signal level is determined to have a fourth state, wherein when the multimedia interface is connected to the display device, an alert message is issued if the multimedia control card is a signal input function multimedia control card.
10. An image array device, characterized in that the image array device comprises:
A switching unit; and
At least one multimedia control card electrically connected with the switching unit, each multimedia control card comprising:
a multimedia interface;
the switch circuit is connected with the multimedia interface, changes a control signal from a first level to a second level, outputs the control signal through the multimedia interface, and receives a first response signal received by the multimedia interface, wherein the first response signal corresponds to the control signal; and
And the controller is connected with the switcher circuit and recognizes the connection state of the multimedia interface according to the first response signal, wherein the connection state is a state for recognizing whether the multimedia interface is connected with a multimedia signal source, connected with display equipment or not connected.
11. The image array device of claim 10, wherein the switch circuit converts the first response signal into a first signal level, and recognizes that the multimedia interface is connected to the multimedia signal source when the first signal level is determined to have a first state, wherein the multimedia control card issues a warning message when the multimedia control card is a multimedia control card with a signal output function.
12. The image array device of claim 11, wherein the switcher circuit further comprises:
the switching circuit generates a corresponding switching signal according to the first response signal; and
The detection circuit receives the switch signal and generates the first signal level according to the switch signal.
13. The image array device of claim 10, wherein the switch circuit receives the first response signal and converts the first response signal to a first signal level, and outputs a voltage through the multimedia interface when the first signal level has a second state.
14. The image array device of claim 13, further comprising a comparator for receiving a second response signal corresponding to the voltage, identifying the multimedia interface as being in an unconnected state when the second signal level is determined to have a third state, and identifying the multimedia interface as being connected to the display device when the second signal level is determined to have a fourth state, and sending an alert message if the multimedia control card is a signal input function multimedia control card.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108134499A TWI697206B (en) | 2019-09-24 | 2019-09-24 | Multimedia controlling adapter and method for recognizing thereof and a video matrix device using the same |
| TW108134499 | 2019-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112637536A CN112637536A (en) | 2021-04-09 |
| CN112637536B true CN112637536B (en) | 2024-06-07 |
Family
ID=72176424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911228005.9A Active CN112637536B (en) | 2019-09-24 | 2019-12-04 | Multimedia control card and identification method thereof and image array device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112637536B (en) |
| TW (1) | TWI697206B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200941288A (en) * | 2008-03-31 | 2009-10-01 | Aten Int Co Ltd | KVM switch and method capable of providing EDID of display for computer coupled thereto |
| TWI611697B (en) * | 2016-10-04 | 2018-01-11 | 神雲科技股份有限公司 | Hdmi device and method for controlling the same |
| CN108205512A (en) * | 2016-12-16 | 2018-06-26 | 佛山市顺德区顺达电脑厂有限公司 | High-definition multimedia interface device and its control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6618773B1 (en) * | 2000-01-25 | 2003-09-09 | Dell Usa L.P. | Receiving a particular identification file among an analog identification file and a digital identification file in response to a request to a dual-interface monitor |
| TW544617B (en) * | 2001-11-08 | 2003-08-01 | Aten Int Co Ltd | Intelligent computer switch |
| US20100064066A1 (en) * | 2008-09-05 | 2010-03-11 | Aten International Co., Ltd. | KVM switch system and interface adapter for detecting interface of computer |
| TWI634787B (en) * | 2017-11-17 | 2018-09-01 | 宏正自動科技股份有限公司 | Apparatus and method for switching video signal |
-
2019
- 2019-09-24 TW TW108134499A patent/TWI697206B/en active
- 2019-12-04 CN CN201911228005.9A patent/CN112637536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200941288A (en) * | 2008-03-31 | 2009-10-01 | Aten Int Co Ltd | KVM switch and method capable of providing EDID of display for computer coupled thereto |
| TWI611697B (en) * | 2016-10-04 | 2018-01-11 | 神雲科技股份有限公司 | Hdmi device and method for controlling the same |
| CN108205512A (en) * | 2016-12-16 | 2018-06-26 | 佛山市顺德区顺达电脑厂有限公司 | High-definition multimedia interface device and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI697206B (en) | 2020-06-21 |
| TW202114350A (en) | 2021-04-01 |
| CN112637536A (en) | 2021-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2140689B1 (en) | Automated compliance testing for video devices | |
| US20050225547A1 (en) | Display system and control method thereof | |
| TW201717609A (en) | Multimedia communication apparatus and control method for audio and video transmission over standard cable | |
| US7123248B1 (en) | Analog multi-display using digital visual interface | |
| KR101239338B1 (en) | Display device and method of the driving | |
| US9955112B2 (en) | Digital-image transmission apparatus which performs communication, self-diagnosis, and control | |
| US20130050582A1 (en) | Enhanced hdmi system and method | |
| US10817242B2 (en) | Image display device, connection method of image display device, and multi-display system | |
| CN112073659B (en) | HDMI (high-definition multimedia interface) control method and device and display equipment | |
| US20080303785A1 (en) | Display apparatus and method for notifying user of state of external device | |
| US11375270B2 (en) | Cable, method of controlling cable, connection device, electronic device, and method of controlling electronic device | |
| JP6949860B2 (en) | HDMI optical cable and HDMI optical converter | |
| CN112637536B (en) | Multimedia control card and identification method thereof and image array device | |
| KR20060111202A (en) | Display apparatus, control method thereof and communication system | |
| US6243780B1 (en) | Interface of a monitor communicating with personal computer | |
| US20210135708A1 (en) | Cable, method for controlling cable, transmission device, method for controlling transmission device, reception device, and method for controlling reception device | |
| US11792361B2 (en) | Redriver capable of switching between linear and limited modes | |
| JP2005091795A (en) | Display device | |
| US20130117491A1 (en) | Electronic device and control method thereof | |
| JP6823729B2 (en) | Video equipment and connection judgment method | |
| EP2058794B1 (en) | Video processing apparatus and control method thereof | |
| US20070153128A1 (en) | Smart cable for controlling video capture device | |
| US8994702B2 (en) | Display system and associated control method | |
| TW202110169A (en) | Circuit and method for use in a first display device to facilitate communication with a second display device, and display communication system | |
| TW201321989A (en) | Input/output devices and display apparatuses using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |