CN112911168A - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN112911168A CN112911168A CN202110121637.6A CN202110121637A CN112911168A CN 112911168 A CN112911168 A CN 112911168A CN 202110121637 A CN202110121637 A CN 202110121637A CN 112911168 A CN112911168 A CN 112911168A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04N5/222—Studio circuitry; Studio devices; Studio equipment
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Abstract
The application discloses a data transmission method and a device, wherein the method comprises the following steps: the central controller acquires a video demand signal of the first external equipment through at least two downlink Type-C interfaces and sends a first control instruction to the channel controller; responding to the first control instruction, the channel controller acquires the parameter information of the first external equipment and transmits the parameter information to the second external equipment connected with the uplink Type-C interface; the central controller receives a video display format supported by the first external equipment, which is determined by the second external equipment according to the parameter information; based on that the video display format supported by the first external equipment is a DP video signal format, the central controller sends a second control instruction to the video signal splitter; and responding to the second control instruction, the video signal splitter receives the DP video signal from the second external equipment and sends the DP video signal to the first external equipment. The DP video signal transmission between the second external equipment host and the first external equipment is realized through a plurality of downlink Type-C interfaces.
Description
Technical Field
The present application relates to the field of computer interface technologies, and in particular, to a data transmission method and apparatus.
Background
The existing Universal Serial Bus (USB) interface includes three different types of interfaces, namely Type-A, Type-B and Type-C. Type-C has a volume much smaller than both Type-A and Type-B, and is the latest USB interface appearance standard. In addition, Type-C is an interface that can be applied to both host devices and external devices.
However, the conventional Type-C interfacing apparatus generally includes only one downstream Type-C interface, and even a multi-port repeater (HUB) having a plurality of Type-C interfaces does not support multi-path (display) video signal transmission, so that DP video signal transmission between a host and a plurality of external devices cannot be realized.
How to realize DP video signal transmission between a host and a plurality of external devices through a plurality of downlink Type-C interfaces is a technical problem to be solved urgently at present.
Disclosure of Invention
An embodiment of the present application provides a data transmission method, including: the central controller acquires a video demand signal of first external equipment through at least two downlink Type-C interfaces and sends a first control instruction to the channel controller, wherein the first control instruction is used for indicating the channel controller to acquire parameter information of the first external equipment; responding to the first control instruction, the channel controller acquires the parameter information of the first external equipment and transmits the parameter information to the second external equipment connected with the uplink Type-C interface; the central controller receives a video display format supported by the first external equipment, which is determined by the second external equipment according to the parameter information; based on that the video display format supported by the first external equipment is a video interface (DP) video signal format, the central controller sends a second control instruction to the video signal splitter, wherein the second control instruction is used for indicating the video signal splitter to receive the DP video signal sent by the second external equipment; and responding to the second control instruction, the video signal splitter receives the DP video signal from the second external equipment and sends the DP video signal to the first external equipment.
Examples of the present application also provide a data transmission apparatus, including: the downlink Type-C interfaces are used for being connected with the first external equipment; the uplink type-C interface is used for being connected with a second external device; the central controller is used for acquiring a video demand signal of the first external equipment through at least two downlink Type-C interfaces and sending a first control instruction; the system comprises a channel controller, a central controller and a DP video signal processing module, wherein the channel controller is used for responding to a first control instruction, the first control instruction is used for indicating the channel controller to acquire parameter information of first external equipment, the channel controller is also used for transmitting the parameter information to second external equipment, the central controller is also used for receiving a video display format which is determined by the second external equipment according to the parameter information and supported by the first external equipment, and sending a second control instruction for the DP video signal format based on the video display format supported by the first external equipment; and the video signal splitter is used for responding to the second control instruction, receiving the DP video signal from the second external equipment and sending the DP video signal to the first external equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present application.
Fig. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present application.
Fig. 3 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 4 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 5 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 6 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 7 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 8 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 9 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 10 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 11 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 12 is a flowchart illustrating a data transmission method according to an embodiment of the present application.
Fig. 13 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
Fig. 14 is a schematic circuit diagram of a data transmission device according to an embodiment of the present application.
Fig. 15 is a block diagram of a configuration of a central controller according to an embodiment of the present application.
Fig. 16 is a block diagram showing a configuration of a channel controller according to an embodiment of the present application.
Fig. 17 is a block diagram showing a configuration of a video signal splitter according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
In order to solve the problems in the prior art, an embodiment of the present application provides a data transmission method, and fig. 1 is a schematic flow chart of the data transmission method according to the embodiment of the present application.
As shown in fig. 1, the method comprises the steps of:
102, the central controller acquires a video demand signal of first external equipment through at least two downlink Type-C interfaces and sends a first control instruction to the channel controller, wherein the first control instruction is used for indicating the channel controller to acquire parameter information of the first external equipment;
104, responding to the first control instruction, acquiring parameter information of the first external equipment by the channel controller, and transmitting the parameter information to second external equipment connected with an uplink Type-C interface;
In step 102, the first external device is a device connected to a downlink Type-C interface, such as a display, a mobile phone, a computer, a head-mounted electronic device, and the like, where one downlink Type-C interface corresponds to one external device.
Optionally, in an embodiment, at least one downlink Type-C interface of the at least two downlink Type-C interfaces is connected to a first external device. Or, optionally, in an embodiment, each of the at least two downlink Type-C interfaces is connected to a first external device.
The video demand signal may be a video signal that the first external device requests to acquire a DP video signal, where the DP video signal refers to a video signal that the DP protocol supports transmission. For example, a video signal having a high frequency such as 1920 × 1080 resolution or a video signal having a low frequency such as 640 × 480 resolution.
In step 102, the central controller is configured to control the channel controller to obtain parameter information of the first external device, where the parameter information of the first external device includes, for example, a resolution of a video display format supported by the first external device, such as 1920 × 1080, 720 × 480, or 640 × 480, information of a number of video transmission channels supported by the first external device, a transmission rate, and the like, and a color depth of a video signal supported by the first external device is 24 bits or 18 bits, and the like.
In step 104, a second external device connected to the uplink type-C interface, such as a host (e.g., a mobile phone, a computer, etc.), is used to provide a corresponding video signal resource based on the video demand signal of the first external device. And the channel controller implements DP negotiation training through the auxiliary channel to realize communication and negotiation between the second external equipment and the downlink first external equipment, so that DP video signal transmission is obtained and carried out according to the parameter information of the first external equipment.
In step 108, the central controller is further configured to control the video signal splitter to receive the DP video signal sent by the second external device, so that in step 109, the DP video signal is sent to the first external device sending the video demand signal through the video signal splitter.
Optionally, in an embodiment, as shown in fig. 2, before the video signal splitter receives the DP video signal from the second external device, the method further includes the following steps:
and step 204, the central controller controls the video signal splitter to receive the DP video signal from the second external device through the first channel based on the number information of the video transmission channels supported by the first external device.
In this embodiment, a predetermined number of first channels are provided between the video signal splitter and the upstream Type-C interface, where the predetermined number of first channels is greater than or equal to the number of video transmission channels supported by the first external device, so that the video signal splitter is sufficient for receiving the DP video signal sent by the second external device and sending the DP video signal to the corresponding first external device.
Optionally, in another embodiment, as shown in fig. 3, before the video signal splitter receives the DP video signal from the second external device, the method further includes:
in step 306, the video signal splitter receives the DP video signal from the second external device through the first channel and the second channel, and sends the DP video signal to the first external device.
In this embodiment, in addition to having a predetermined number of first channels between the video signal splitter and the upstream Type-C interface, there are also a predetermined number of second channels between the signal switcher and the upstream Type-C interface, which may also be used to receive DP video signals of a second peripheral. For example, this embodiment may be used in the case where the predetermined number of first channels is less than the number of video transmission channels supported by the first external device, and the DP video signal transmitted by the second external device is received only by the first channel insufficient video signal splitter.
Therefore, in step 304, the signal switch needs to be switched to the second channel to connect with the video signal splitter, so that the video signal splitter can receive the DP video signal sent by the second external device through a sufficient channel and send the DP video signal to the corresponding first external device.
For example, the first external device sending the video demand signal is a 4K display, and the second external device determines that the 4K display needs four channels to transmit the DP video signal according to the parameter information of the second external device. For example, the number of the first channels between the video signal splitter and the uplink Type-C interface is only two, which is not enough for the video signal splitter to receive the DP video signal sent by the second external device. For example, the number of the second channels between the signal switch and the uplink Type-C interface may also be two, and then the signal switch may be switched to the second channel to be connected with the video signal splitter, and the DP video signal sent by the second external device is received through the two first channels and the two second channels.
Optionally, in an embodiment, as shown in fig. 4, the data transmission method further includes:
in step 406, the first USB hub receives the non-video data from the second external device and sends the non-video data to the first external device.
As described above, in step 102, the central controller can obtain the video demand signal of the first external device through at least two downlink Type-C interfaces. In this embodiment, in step 404, the central controller obtains a non-video demand signal of the first external device through at least two downlink Type-C interfaces, where the non-video demand signal is, for example, a non-video data received and transmitted by a Universal Serial Bus (USB) hub.
In this embodiment, the signal switch switches to the second channel to communicate with the first USB hub, and the number of the second channel is sufficient for receiving the non-video data corresponding to the non-video demand signal of the first external device. Therefore, through a second channel between the signal change-over switch and the uplink Type-C interface, the first USB concentrator sends the received non-video data to the corresponding first external equipment.
That is, the second channel between the signal switch and the uplink Type-C interface can be multiplexed between the video signal splitter and the first USB hub.
Specifically, when the first external device sends a video demand signal and the number of first channels used for receiving the DP video signal between the video signal splitter and the uplink Type-C interface is less than the number of video transmission channels supported by the first external device, the signal switch switches to the second channel to communicate with the video signal splitter, and receives the DP video signal sent by the second external device through the first channel and the second channel. When the first external equipment sends a non-video demand signal, the signal switch is switched to a second channel to be communicated with the first USB hub, and non-video data sent by the second external equipment is received through the second channel.
Optionally, in an embodiment, as shown in fig. 5, the data transmission method further includes:
in step 504, the second USB hub receives the non-video data from the second external device and sends the non-video data to the first external device.
In this embodiment, the second USB hub may directly receive the non-video data transmitted by the second external device through the upstream Type-C interface. The channel between the second USB hub and the uplink Type-C interface may be different from the first channel between the video signal splitter and the uplink Type-C interface.
Optionally, in an embodiment, as shown in fig. 6, in step 109, the video signal splitter sends the DP video signal to the first external device, including the following steps:
The video signal branching unit divides DP video signals sent by the second external equipment into the same number of branches as the number of the first external equipment sending the video demand signals, and one branch corresponds to one first external equipment. The video signal branching unit copies the DP video signals sent by the second external equipment into the same number of parts as the corresponding branches, and synchronously sends the DP video signals to each correspondingly connected first external equipment.
In addition, as described above, the second external device determines the number information of the video transmission channels supported by the first external device according to the parameter information of the first external device, and determines to transmit the DP video signal to the first external device through several channels. And if the second external equipment determines that the first external equipment supports two or more channels for transmission according to the parameter information of the first external equipment, transmitting the DP video signal to the first external equipment through the two or more channels. For example, the first external device is (augmented reality glasses) AR glasses, the second external device determines that the AR glasses need two channels to transmit according to the parameter information of the first external device, and each byte of the DP video signal transmitted in series is transmitted through the two channels respectively. Specifically, the 1 st byte of the DP video signal uses the 1 st channel, the 2 nd byte uses the 2 nd channel, and accordingly, the subsequent 3 rd, 5 th, 7 th, 9 … th odd bytes also use the 1 st channel, and the 4 th, 6 th, 8 th, 10 … even bytes also use the 2 nd channel.
Similarly, for example, the first external device is a 4K display, and the second external device determines that the 4K display needs four channels to transmit according to the parameter information, so that each byte of the DP video signal transmitted in series is transmitted through two channels respectively. Specifically, the 1 st byte of the DP video signal uses the 1 st channel, the 2 nd byte uses the 2 nd channel, the 3 rd byte uses the 3 rd channel, and the 4 th byte uses the 4 th channel. Accordingly, the subsequent 5 th, 9 th, 13 th, … th byte uses the 1 st channel, the 6 th, 10 th, 14 th, … th byte uses the 2 nd channel, the 7 th, 11 th, 15 th, … th byte uses the 3 rd channel, and the 8 th, 12 th, 16 th, … th byte uses the 4 th channel.
In step 602, the video signal splitter multiplexes the DP video signals transmitted from the second external device via two or more channels, for example, 2-channel or 4-channel, into two or more branches corresponding to the number of the two or more first external devices, and in step 604, each branch synchronously transmits the DP video signals corresponding to the branch to the two or more first external devices via two or more channels, for example, 2-channel or 4-channel, so that the two or more first external devices display the same DP video signals.
Taking two first external devices as an example, the first external device is a 4K display, the second external device determines to send the DP video signals in 4 channels according to the parameter information of the 4K display, and then the video signal splitter divides the DP video signals into two branches corresponding to the number of the two external devices after receiving the DP video signals sent by the second external device through the 4 channels in the upstream, and each branch synchronously sends the corresponding DP video signals to a corresponding first external device in 4 channels. Therefore, the two first external devices display the same DP video signal at the same time.
In this embodiment, the video signal splitter splits the DP video signal into the same number of splits as the number of first external devices corresponding to the video demand signal, so that each split transmits the DP video signal sent by the second external device to the corresponding first external device synchronously, and each first external device displays the same DP video signal simultaneously. Namely, the different screens can be displayed simultaneously in a synchronous and shunt way.
Optionally, in one embodiment, the DP video signal comprises two or more different video signals. As shown in fig. 7, before the video signal splitter transmits the DP video signal to the first external device in step 109, the method further includes:
two or more different video signals are asynchronously received from a second external device over the same channel, step 702. That is, the second external device transmits different video signals to the video splitter in a time-sharing manner through the same channel.
In this embodiment, the sum of the bandwidth rates of two or more different video signals asynchronously received by the video signal splitter over the same channel is less than the bandwidth rate of the same channel. For example, 30ms transmits video signal 1 and the next 30ms transmits video signal 2. In this way, the video signal splitter can asynchronously receive two or more different video signals from the second external device over the same channel.
The video signal splitter transmitting the DP video signal to the first external device includes step 704 of transmitting two or more different video signals to the two or more first external devices, so that the two or more first external devices display the different DP video signals, respectively.
In this embodiment, unlike the embodiment of fig. 6, when the DP video signal includes different video signals, the number of these different video signals is equivalent to the number of the first external devices. In this way, different video signals received asynchronously on the same channel can be transmitted in an asynchronous manner. For example, one 30ms transmits video signal 1 to one first external device, and the next 30ms transmits video signal 2 to another first external device. Therefore, different video signals are asynchronously received through the same channel and correspondingly sent to different first external devices through different branches, namely different-screen different-display is realized in an asynchronous and same channel mode.
Optionally, in one embodiment, the DP video signal comprises two or more different video signals. As shown in fig. 8, before the video signal splitter transmits the DP video signal to the first external device in step 109, the method includes:
two or more different video signals are simultaneously received from a second external device over different channels, step 802.
Unlike the implementation of fig. 7, in this embodiment, the video signal splitter receives two or more different video signals simultaneously through different channels. Here, the bandwidth rate of each video signal is less than the bandwidth of the channel to which it is transmitted. The video signal splitter may receive two or more different video signals from the second external device synchronously through different channels.
Here, the video signal splitter transmitting the DP video signal to the first external device includes a step 804 of transmitting two or more different video signals to the two or more first external devices so that the two or more first external devices display the different DP video signals, respectively.
In this embodiment, the number of different video signals is also comparable to the number of first external devices. Therefore, different video signals received by different channels can be synchronously and respectively transmitted to the corresponding first external equipment. Thereby through different channel synchronous reception different video signal to correspond through different shunts and send different first external device, realize different screen abnormal display promptly through the mode of the same step with different channel.
Optionally, in an embodiment, as shown in fig. 9, in step 102, the central controller obtains a video demand signal of the first external device through at least two downlink Type-C interfaces, and sends a first control instruction to the channel controller, where the method includes the following steps:
in step 908, the uplink interface control module sends the request to the connection module, so that the connection module notifies the external control module of the central controller to send a first control instruction to the channel controller based on the request.
In this embodiment, the central controller includes an uplink interface control module, a connection module, a downlink interface control module, and an external control module. Through the modules, the central controller realizes communication information interaction with the first external equipment, the second external equipment, the channel controller and the like, and realizes data transmission.
Optionally, in an embodiment, as shown in fig. 10, before the step 104 of acquiring parameter information of the first external device and transmitting the parameter information to the second external device connected to the upstream Type-C interface, the method further includes the following steps:
in step 1004, the data distribution module sends the parameter information to the data uplink transceiver module of the channel controller, so that the data uplink transceiver module transmits the parameter information to the second external device.
In this embodiment, the channel controller includes a data uplink transceiver module, a data allocation module, and a data downlink transceiver module. Through the modules, the channel controller realizes communication information interaction with the first external equipment and the second external equipment, and realizes data transmission.
Optionally, in an embodiment, as shown in fig. 11, the step 109 of the video signal splitter receiving the DP video signal from the second external device and sending the DP video signal to the first external device includes the following steps:
in step 1106, the output module of the video signal splitter sends the DP video signal to the first external device through the corresponding channel based on the channel allocated by the allocating module.
In this embodiment, the video signal splitter includes a recovery module, a distribution module, and an output module. Through the modules, the video signal splitter realizes communication information interaction with the central controller, the first external equipment and the second external equipment, and data transmission is realized.
Optionally, in an embodiment, as shown in fig. 12, before the video signal splitter receives the DP video signal from the second external device in step 109, the method further includes the following steps:
in step 1206, the central controller receives a matching result notification that the random code sent by the second external device matches the preset code, and sends a second control instruction to the video signal splitter.
In this embodiment, the random code is used to probe whether a channel state of the second external device transmitting the DP video signal to the first external device is a path, and if the first external device determines that the random code sent by the second external device matches the preset code, the corresponding channel is a path and may be used for DP video signal transmission. And if the first external equipment judges that the random code sent by the second external equipment is not matched with the preset code, the corresponding channel cannot be used for DP video signal transmission. The second external device may inform the channel controller to obtain the matching result from the corresponding first external device and feed back the matching result to the first external device, so that the first external device may determine a channel that may be used to transmit the DP video signal.
Specifically, according to an embodiment of the present application, in step 908, the connection module of the central controller notifies the external control module of the central controller to send a first control instruction to the data distribution module of the channel controller based on the request sent by the uplink interface control module of the central controller, and the data distribution module sends the received first control instruction to the data downlink transceiver module of the channel controller, so that the data downlink transceiver module obtains the parameter information of the first external device according to the first control instruction.
In the above step 1102, the distribution module of the video signal splitter receives a second control instruction sent by the external control module of the central controller, and enables the recovery module of the video signal splitter to receive and recover the clock and the video data corresponding to the DP video signal from the second external device according to the second control instruction, and in step 1104, the distribution module of the video signal splitter receives a channel number sent by the external control module of the central controller according to the DP video signal, and distributes the recovered DP video signal transmitted by the recovery module to a corresponding channel based on the channel number.
In step 1202, a random code generated by the second external device according to the parameter information is received via the recovery module of the video signal splitter, and the random code is assigned to the output module by the assignment module of the video signal splitter, so that the random code is transmitted to the first external device by the output module of the video signal splitter.
In step 1204, a matching result of the first external device determining whether the random code matches the preset code is received via the data downlink transceiver module of the channel controller, and sent to the data distribution module of the channel controller, and the matching result is distributed to the data uplink transceiver module of the channel controller by the data distribution module, so that the data uplink transceiver module sends the matching result to the second external device.
In step 1206, the uplink interface control module of the central controller receives a matching result notification that the random code sent by the second external device matches the preset code, and sends the matching result notification to the connection module of the central controller, and the connection module sends the matching result notification to the external control module of the central controller, so as to send a second control instruction to the distribution module of the video signal splitter through the external control module, as described above, so that the recovery module of the video signal splitter receives and recovers the DP video signal from the second external device.
In the embodiment of the application, the central controller acquires a video demand signal of first external equipment through at least two downlink Type-C interfaces, and sends a first control instruction to the channel controller to instruct the channel controller to acquire parameter information of the first external equipment; responding to the first control instruction, the channel controller acquires the parameter information of the first external equipment and transmits the parameter information to the second external equipment connected with the uplink Type-C interface; the central controller receives a video display format which is determined by the second external equipment according to the parameter information and supported by the first external equipment, and sends a second control instruction to the video signal splitter based on the DP video signal format supported by the first external equipment so as to instruct the video signal splitter to receive the DP video signal sent by the second external equipment; and responding to the second control instruction, the video signal splitter receives the DP video signal from the second external equipment and sends the DP video signal to the first external equipment, so that the DP video signal transmission between the second external equipment and the plurality of first external equipment can be realized through a plurality of downlink Type-C interfaces.
Furthermore, the function that the second external equipment and the plurality of first external devices synchronously play the corresponding DP videos can be realized by transmitting the DP video signals of the second external equipment to the plurality of first external devices connected with the plurality of downlink Type-C interfaces.
In addition, in order to solve the problems existing in the prior art, an embodiment of the present application further provides a data transmission apparatus, including: the downlink Type-C interfaces are used for being connected with the first external equipment; the uplink Type-C interface is used for being connected with a second external device; the central controller is used for acquiring a video demand signal of the first external equipment through at least two downlink Type-C interfaces and sending a first control instruction; the system comprises a channel controller, a central controller and a DP video signal processing module, wherein the channel controller is used for responding to a first control instruction, the first control instruction is used for indicating the channel controller to acquire parameter information of first external equipment, the channel controller is also used for transmitting the parameter information to second external equipment, the central controller is also used for receiving a video display format which is determined by the second external equipment according to the parameter information and supported by the first external equipment, and sending a second control instruction for the DP video signal format based on the video display format supported by the first external equipment; and the video signal splitter is used for responding to the second control instruction, receiving the DP video signal from the second external equipment and sending the DP video signal to the first external equipment.
Fig. 13 shows a structural example of the data transmission device according to the present application, and as shown in fig. 13, the data transmission device of this example is designed in a form of a multi-port Type-C, and includes a plug 10 and two slots 20, where the plug 10 is an uplink Type-C interface, and the slot 20 is a downlink Type-C interface. The plug 10 is used for being connected with the second external equipment, and the Type-C signal of the full function of the second external equipment is transmitted to the interior of the data transmission device through the plug 10 and the cable. The two slots 20 are used for connecting with the first external device, so that the second external device sends the video signal corresponding to the video demand signal of the first external device to the corresponding first external device through the slots 20.
It should be noted that the data transmission apparatus of the present application is not limited to the structural form of the embodiment in fig. 13, nor to the downlink Type-C interfaces in which the number of the embodiments in fig. 13 is two, and any data transmission apparatus having an uplink Type-C interface and multiple downlink Type-C interfaces falls within the protection scope of the present application.
Referring now to fig. 14, fig. 14 is a schematic circuit diagram of a data transmission device according to an embodiment of the present application. As shown in the figure, the data transmission device in this embodiment of the present application includes an uplink Type-C interface 1010, a central controller 1040, a channel controller 1050, a video signal splitter 1060, and at least two downlink Type-C interfaces, for example, a downlink Type-C interface 1, a downlink Type-C interface 2, a.
A downlink Type-C interface is connected with a first external device. For example, in the example of fig. 14, the downlink Type-C interface 1 is connected to the first external device 1, the downlink Type-C interface 2 is connected to the first external device 2, and.
In one embodiment, only the downlink Type-C interface 1 is connected to the first external device 1, and other downlink Type-C interfaces may be left vacant or may be connected to a third external device. The third external device may be, for example, a non-video playing device such as a USB flash drive.
In one embodiment, at least one downlink Type-C interface of the at least two downlink Type-C interfaces is connected with a first external device, that is, n is greater than m.
In one embodiment, each of the at least two downlink Type-C interfaces is connected to a first external device, that is, n is equal to m.
Hereinafter, the number of the first external devices connected corresponding to the following Type-C interface is two. For example, the downlink Type-C interface 1 is connected to the first external device 1, and the downlink Type-C interface 2 is connected to the first external device 2.
The uplink Type-C interface 1010 is used for being connected to the second external device 30, for example, the uplink Type-C interface 1010 designed by a plug is inserted into a slot of the second external device 30, so that the second external device 30 can be connected to the data transmission device.
Well accuse ware 1040 obtains the video demand signal of first external device 1 through descending Type-C interface 1, obtains the video demand signal of first external device 2 through descending Type-C interface 2 to send first control instruction.
The channel controller 1050 responds to the first control instruction, which is used to instruct the channel controller 1050 to acquire the parameter information of the first external device 1 and the first external device 2, and the channel controller 1050 is also used to transmit the parameter information to the second external device 30. The central controller 1040 is further configured to receive the video display formats supported by the first external device 1 and the first external device 2, which are determined by the second external device 30 according to the parameter information, and send a second control instruction for the DP video signal format based on the video display formats supported by the first external device 1 and the first external device 2.
The video signal splitter 1060 is configured to receive the DP video signal from the second external device 30 in response to the second control command, and transmit the DP video signal to the first external device 1 and the first external device 2.
As shown in fig. 14, the central controller 1040 senses the upstream second external device 30 through a CC channel, senses the first external device 1 connected to the downstream Type-C interface 1 through a P1_ CC channel, and senses the second external device 2 connected to the downstream Type-C interface 2 through a P2_ CC channel.
When sensing that the first external device 1 and the first external device 2 are connected through the P1_ CC and the P2_ CC channels, the central controller 1040 may actively obtain the video demand information of the first external device 1 and the first external device 2.
In addition, the central controller 1040 may also sense whether the correspondingly connected first external device 1 and first external device 2 are inserted in the forward direction or the reverse direction through the P1_ CC and P2_ CC channels. The central controller correspondingly opens the transmission channel for forward insertion or the transmission channel for reverse insertion through the forward and reverse insertion selector switches 1 and 2 according to the sensing result.
The central controller 1040 acquires the video demand signal of the first external device 1 through the P1_ CC channel, acquires the video demand signal of the first external device 2 through the P2_ CC channel, and sends a first control instruction to the channel controller 1050, so that the channel controller 1050 acquires the parameter information of the first external device 1 and the first external device 2 according to the instruction of the first control instruction.
As shown in fig. 14, the channel controller 1050 communicates with the second external device 30 that is upstream through the AUX channel, communicates with the first external device connected to the downstream Type-C interface 1 through the P1_ AUX channel, and communicates with the second external device 2 connected to the downstream Type-C interface 2 through the P2_ AUX channel. Therefore, the channel controller 1050 correspondingly obtains the parameter information of the first external device 1 and the first external device 2 through the P1_ AUX channel and the P2_ AUX channel, respectively, according to the instruction of the first control instruction, and transmits the parameter information to the second external device 30 through the AUX channel.
The video signal splitter 1060 receives the DP video signal from the second external device 30 through a first channel, e.g., the two channels TX2, RX2 as shown. In this case, the video signal splitter 1060 transmits the received DP video signal downstream to the first external device 1 through two channels, for example, P1ML0 and P1ML1 channels shown in fig. 14, and transmits the received DP video signal to the first external device 2 through P2ML0 and P2ML1 channels shown in fig. 14.
As shown in fig. 14, the data transmission apparatus further includes: a signal switch 1070, the signal switch 1070 is configured to switch to a second channel, for example, the two channels TX1 and RX1 are shown to communicate with the video signal splitter 1060, and the video signal splitter 1060 receives the DP video signal from the second external device 30 through the four channels of the first channel TX2 and RX2 and the second channels TX1 and RX 1. In this case, the video signal splitter 1060 transmits the received DP video signal downstream to the first external device 1 through four channels, for example, P1ML0, P1ML1, P1ML2, and P1ML3 channels shown in fig. 14, and transmits the received DP video signal to the first external device 2 through P2ML0, P2ML1, P2ML2, and P2ML3 channels shown in fig. 14.
In one embodiment, as shown in fig. 14, the data transmission apparatus further includes: the first USB hub 1080 and the signal switch 1070 are further configured to switch to a second channel to communicate with the first USB hub 1080, and the first USB hub 1080 is configured to receive the non-video data from the second external device 30 and send the non-video data to the first external device 1 and the second external device 2.
Specifically, the signal switch 1070 receives the non-video data from the second external device 30 through the second channels TX1 and RX1 and transmits the non-video data to the first USB hub 1080 through the TX and RX channels, so that the non-video data is transmitted to the first external device 1 through the TX11 and RX11 channels and the non-video data is transmitted to the first external device 2 through the TX22 and RX22 channels by the first USB hub 1080.
In one embodiment, as shown in fig. 14, the data transmission apparatus further includes: the second USB hub 1090 and the second USB hub 1090 are configured to receive non-video data from the second external device 30 and transmit the non-video data to the first external device 1 and the first external device 2. Specifically, the second USB hub 1090 communicates with the second external device 30 through the D channel and transmits non-video data to the corresponding first external device 1 and first external device 2 through the P1_ D, P2_ D channel, respectively.
Fig. 15 is a block diagram illustrating a configuration of a central controller according to an embodiment of the present application, and as shown in fig. 15, the central controller 1040 includes: the downlink interface control module 1042 is configured to obtain a video demand signal of the first external device based on sensing that the first external device is inserted into at least two downlink Type-C interfaces; a connection module 1044, configured to receive and forward the video demand signal sent by the downlink interface control module 1042; the uplink interface control module 1046 is configured to send the video demand signal forwarded by the connection module 1044 to the second external device, and send a request, sent by the second external device in response to the video demand signal, for acquiring parameter information of the first external device to the connection module; and an external control module 1048, configured to send, according to the notification sent by the connection module 1044 based on the request, a first control instruction to the channel controller.
Optionally, the uplink interface control module 1046 is further configured to: and receiving the video display format supported by the first external equipment determined by the second external equipment according to the parameter information. A connection module 1044, further configured to: and receiving the determined video display format sent by the uplink interface control module. An external control module 1048 further configured to: and sending a second control instruction to the video signal splitter according to the notification of the video display format sent by the connection module.
Specifically, the uplink interface control module 1046 is connected to the CC channel, and after the uplink Type-C interface is connected to the second external device, the uplink interface control module 1046 enables the second external device to sense that the data transmission device has been accessed.
When the connection module 1044 notifies that the first external device requests the second external device to provide the resource corresponding to the video demand signal, the uplink interface control module 1046 sends a message to the second external device through the CC channel to request and confirm the corresponding resource output. When receiving a message sent by the second external device, the uplink interface control module 1046 transfers the message to the connection module 1044 for processing. In addition, when a connection problem occurs in the uplink Type-C interface, the uplink interface control module 1046 may further notify the connection module 1044 to perform processing.
Specifically, the connection module 1044 has the following functions: the downlink interface control module 1042 acquires parameter information of the first external device required by the second external device; the video demand signal sent by the downlink interface control module 1042 is forwarded to the uplink interface control module 1046; processing the connection problem of an uplink Type-C interface and a downlink Type-C interface; and making corresponding control actions to inform the video signal branching unit and the channel controller, wherein the control actions comprise sending a second control instruction to the video signal branching unit, sending a first control instruction to the channel controller and sending a control signal to the positive and negative insertion changeover switch.
Fig. 16 is a block diagram showing a configuration of a channel controller according to an embodiment of the present application, and as shown in fig. 16, the channel controller 1050 includes: the data downlink transceiving module 1052 is configured to, before transmitting the parameter information to the second external device connected to the uplink Type-C interface, acquire and send the parameter information of the first external device according to the first control instruction; a data distribution module 1054, configured to receive and forward the parameter information; and an uplink transceiver module 1056, configured to transmit the parameter information forwarded by the data distribution module 1054 to the second external device.
Specifically, the uplink transceiver module 1056 is connected with the AUX channel, and the data distribution module 1054 is connected with the video signal splitter and the channel controller; the data downlink transceiver module 1052 is connected with at least two downlink Type-C interfaces.
Fig. 17 is a block diagram illustrating a structure of a video signal splitter according to an embodiment of the present application, and as shown in fig. 17, the video signal splitter 1060 includes: the recovery module 1062 is configured to receive and recover a clock and video data corresponding to the DP video signal from the second external device based on the second control instruction sent by the central controller; the distribution module 1064 is configured to receive a channel number sent by the central controller according to the DP video signal, and distribute, based on the channel number, the recovered DP video signal transmitted by the recovery module to a corresponding channel; and an output module 1066, configured to send the DP video signal to the first external device through a corresponding channel based on the channel allocated by the allocation module 1064.
In this embodiment, the DP video signal sent by the channel contains the transmitted video digital information, and after the DP video signal is transmitted through the channel, the DP video signal may generate frequency conversion, which may cause data to be out of order. Therefore, the recovery module 1062 needs to recover the clock and the video data corresponding to the received DP video signal, so that the time occupied by each data is fixed, thereby recovering the clock signal. For example, each clock cycle occupies one bit of data, the clock determines the received data, one bit of data is received at a fixed time, a plurality of data bits represent the corresponding DP video signal, and the DP video signal from the second external device is restored through the restoring step, so that the corresponding first external device normally displays the received DP video signal.
The data transmission device provided in the embodiment of this specification can implement each process implemented by the method embodiments of fig. 1 to 12, and is not described here again to avoid repetition.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the embodiments of this application have been described in connection with the accompanying drawings, the application is not limited to the specific embodiments described above, which are intended to be illustrative rather than limiting, and that many modifications may be made by those skilled in the art without departing from the scope of the application.
Claims (24)
1. A method of data transmission, comprising:
the method comprises the steps that a central controller acquires a video demand signal of first external equipment through at least two downlink Type-C interfaces and sends a first control instruction to a channel controller, wherein the first control instruction is used for indicating the channel controller to acquire parameter information of the first external equipment;
responding to the first control instruction, the channel controller acquires the parameter information of the first external equipment and transmits the parameter information to a second external equipment connected with an uplink Type-C interface;
the central controller receives the video display format supported by the first external equipment, which is determined by the second external equipment according to the parameter information;
based on that the video display format supported by the first external device is a video interface (DP) video signal format, the central controller sends a second control instruction to the video signal splitter, wherein the second control instruction is used for instructing the video signal splitter to receive the DP video signal sent by the second external device; and
and responding to the second control instruction, the video signal splitter receives the DP video signal from the second external equipment and sends the DP video signal to the first external equipment.
2. The method of claim 1, wherein at least one of the at least two downstream Type-C interfaces is connected with a first external device.
3. The method of claim 1, wherein each of the at least two downstream Type-C interfaces has a first peripheral connected thereto.
4. The method of claim 1, wherein the video signal splitter sending the DP video signal to the first peripheral device comprises:
splitting the DP video signal into two or more splits commensurate with the number of two or more of the first peripherals; and
and synchronously sending the two or more branched DP video signals to two or more first external devices so that the two or more first external devices display the same DP video signal.
5. The method of claim 1, wherein the DP video signal comprises two or more different DP video signals, and wherein the video signal splitter further comprises, prior to transmitting the DP video signal to the first peripheral device:
asynchronously receiving the two or more different DP video signals from the second external device over the same channel;
the video signal splitter transmitting the DP video signal to the first external device includes:
and sending the two or more different DP video signals to two or more first external devices so that the two or more first external devices respectively display different DP video signals.
6. The method of claim 1, wherein the DP video signal comprises two or more different DP video signals, and wherein the video signal splitter further comprises, prior to transmitting the DP video signal to the first peripheral device:
synchronizing the two or more different DP video signals for reception from the second external device over different channels;
the video signal splitter transmitting the DP video signal to the first external device includes:
and sending the two or more different DP video signals to two or more first external devices so that the two or more first external devices respectively display different DP video signals.
7. The method of claim 1, wherein prior to the video signal splitter receiving the DP video signal from the second peripheral device, further comprising:
the central controller obtains the number information of the video transmission channels supported by the first external equipment, which is determined by the second external equipment according to the parameter information, and controls the video signal splitter to receive the DP video signal from the second external equipment through a first channel based on the number information of the video transmission channels supported by the first external equipment.
8. The method of claim 1, wherein prior to the video signal splitter receiving the DP video signal from the second peripheral device, further comprising:
the central controller acquires the number information of the video transmission channels supported by the first external equipment, which is determined by the second external equipment according to the parameter information, and sends a third control instruction to the signal switch based on the number information of the video transmission channels supported by the first external equipment;
responding to the third control instruction, the signal switch switches to a second channel to be communicated with the video signal splitter; and
the video signal splitter receives DP video signals from the second external equipment through the first channel and the second channel, and sends the DP video signals to the first external equipment.
9. The method of claim 1, further comprising:
the central controller acquires a non-video demand signal of the first external device through the at least two downlink Type-C interfaces, and sends a fourth control instruction to the signal switch based on the non-video demand signal;
in response to the fourth control instruction, the signal selector switch switches to a second channel to be communicated with the first USB hub; and
and the first USB hub receives non-video data from the second external equipment and sends the non-video data to the first external equipment.
10. The method of claim 1, further comprising:
the central controller acquires a non-video demand signal of the first external equipment through the at least two downlink Type-C interfaces; and
and the second USB hub receives the non-video data from the second external equipment and sends the non-video data to the first external equipment.
11. The method of any one of claims 1 to 10, wherein the central controller obtains the video demand signal of the first external device through at least two downlink Type-C interfaces, and the sending the first control instruction to the channel controller comprises:
a downlink interface control module of the central controller acquires a video demand signal of first external equipment based on sensing that the first external equipment is inserted into the at least two downlink Type-C interfaces, and sends the video demand signal to a connection module of the central controller;
the connection module forwards the video demand signal to an uplink interface control module of the central controller;
the uplink interface control module sends the video demand signal to the second external equipment and receives a request which is sent by the second external equipment in response to the video demand signal and is used for acquiring the parameter information of the first external equipment; and
and the uplink interface control module sends the request to the connection module so that the connection module informs an external control module of the central controller to send the first control instruction to the channel controller based on the request.
12. The method according to any one of claims 1 to 10, before the channel controller obtains the parameter information of the first external device and transmits the parameter information to the second external device connected by the upstream type-C interface, further comprising:
the data downlink transceiving module of the channel controller acquires parameter information of the first external device according to the first control instruction and sends the parameter information to the data distribution module of the channel controller; and
and the data distribution module sends the parameter information to a data uplink transceiving module of the channel controller, so that the data uplink transceiving module transmits the parameter information to the second external device.
13. The method of any of claims 1 to 10, wherein the video signal splitter receives a DP video signal from the second peripheral device, and sending the DP video signal to the first peripheral device comprises:
based on the second control instruction sent by the central controller, a recovery module of the video signal splitter receives and recovers a clock and video data corresponding to the DP video signal from the second external device;
the distribution module of the video signal splitter receives the channel number sent by the central controller according to the DP video signal, and distributes the recovered DP video signal transmitted by the recovery module to a corresponding channel based on the channel number; and
and the output module of the video signal splitter sends the DP video signal to the first external equipment through a corresponding channel based on the channel distributed by the distribution module.
14. The method of any of claims 1 to 10, further comprising, before the video signal splitter receives the DP video signal from the second peripheral device:
sending a random code generated by the second external device according to the parameter information to the first external device via the video signal splitter;
sending a matching result of the first external device for judging whether the random code is matched with a preset code to the second external device through the channel controller; and
and the central controller receives a matching result notification of the random code and the preset code, which are sent by the second external device, and sends the second control instruction to the video signal splitter.
15. A data transmission apparatus, the apparatus comprising:
the downlink Type-C interfaces are used for being connected with the first external equipment;
the uplink type-C interface is used for being connected with a second external device;
the central controller is used for acquiring a video demand signal of the first external equipment through at least two downlink Type-C interfaces and sending a first control instruction;
the channel controller is used for responding to the first control instruction, wherein the first control instruction is used for indicating the channel controller to acquire parameter information of the first external equipment, the channel controller is also used for transmitting the parameter information to second external equipment, the central controller is also used for receiving a video display format which is determined by the second external equipment according to the parameter information and supported by the first external equipment, and sending a second control instruction for a DP video signal format based on the video display format supported by the first external equipment; and
and the video signal splitter is used for responding to a second control instruction, receiving the DP video signal from the second external equipment and sending the DP video signal to the first external equipment.
16. The apparatus of claim 15, wherein the video signal splitter receives a DP video signal from the second peripheral device over a first channel.
17. The apparatus of claim 15, further comprising: and the signal switch is used for switching to a second channel to be communicated with the video signal splitter, and the video signal splitter receives the DP video signal from the second external equipment through the first channel and the second channel.
18. The apparatus of claim 15, further comprising: the signal switch is further used for switching to a second channel to be communicated with the first USB hub, and the first USB hub is used for receiving non-video data from the second external equipment and sending the non-video data to the first external equipment.
19. The apparatus of claim 15, further comprising: and the second USB hub is used for receiving the non-video data from the second external equipment and sending the non-video data to the first external equipment.
20. The apparatus of any one of claims 15 to 19, wherein the central controller comprises:
the downlink interface control module is used for acquiring a video demand signal of the first external equipment based on sensing that the first external equipment is inserted into the at least two downlink Type-C interfaces;
the connection module is used for receiving and forwarding the video demand signal sent by the downlink interface control module;
the uplink interface control module is used for sending the video demand signal forwarded by the connection module to the second external device and sending a request, sent by the second external device in response to the video demand signal, for acquiring the parameter information of the first external device to the connection module; and
and the external control module is used for sending the first control instruction to the channel controller according to the notification sent by the connection module based on the request.
21. The apparatus of claim 20, wherein,
the uplink interface control module is further configured to: receiving the video display format which is determined by the second external equipment according to the parameter information and supported by the first external equipment;
the connection module is further configured to: receiving the determined video display format sent by the uplink interface control module; and
the external control module is further configured to: and sending the second control instruction to the video signal splitter according to the notification of the video display format sent by the connection module.
22. The apparatus of any of claims 15 to 19, wherein the channel controller comprises:
the data downlink transceiving module is used for acquiring and sending the parameter information of the first external equipment according to the first control instruction before the parameter information is transmitted to the second external equipment connected with the uplink type-C interface;
the data distribution module is used for receiving and forwarding the parameter information; and
and the uplink transceiving module is used for transmitting the parameter information forwarded by the data distribution module to the second external device.
23. The apparatus of any one of claims 15 to 19, wherein the video signal splitter comprises:
the recovery module is used for receiving and recovering a clock and video data corresponding to the DP video signal from the second external equipment based on the second control instruction sent by the central controller;
the distribution module is used for receiving the channel number sent by the central controller according to the DP video signal and distributing the recovered DP video signal transmitted by the recovery module to a corresponding channel based on the channel number; and
and the output module is used for sending the DP video signal to the first external equipment through a corresponding channel based on the channel distributed by the distribution module.
24. The apparatus of any one of claims 15 to 19,
the video signal splitter is further configured to: before receiving a DP video signal from the second external device, sending a random code generated by the second external device according to the parameter information to the first external device;
the channel controller is further configured to: sending a matching result of the first external device for judging whether the random code is matched with a preset code to the second external device; and
the central controller is further used for: and receiving a matching result notification that the random code and the preset code are matched, which is sent by the second external device, and sending the second control instruction to the video signal splitter based on the matching result.
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| CN103595943A (en) * | 2013-11-16 | 2014-02-19 | 京东方科技集团股份有限公司 | Video signal transmission equipment, playing system and video signal transmission method |
| US20190082141A1 (en) * | 2017-09-12 | 2019-03-14 | Aten International Co., Ltd. | Video signal transmission switching apparatus |
| CN210781063U (en) * | 2019-12-12 | 2020-06-16 | 深圳市绿联科技有限公司 | Multifunctional matrix switcher based on USB TYPE-C interface |
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| CN103595943A (en) * | 2013-11-16 | 2014-02-19 | 京东方科技集团股份有限公司 | Video signal transmission equipment, playing system and video signal transmission method |
| US20190082141A1 (en) * | 2017-09-12 | 2019-03-14 | Aten International Co., Ltd. | Video signal transmission switching apparatus |
| CN210781063U (en) * | 2019-12-12 | 2020-06-16 | 深圳市绿联科技有限公司 | Multifunctional matrix switcher based on USB TYPE-C interface |
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